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Papers by JOSE MANUEL MACARIO REBELO

Research paper thumbnail of First record of Aedeomyia squamipennis (Lynch Arribálzaga, 1878) (Diptera: Culicidae) in the state of Maranhão: epidemiological implications and distribution in Brazil

Check List, Apr 4, 2017

We record Aedeomyia squamipennis from the state of Maranhão, Brazil (municipalities of Bacurituba... more We record Aedeomyia squamipennis from the state of Maranhão, Brazil (municipalities of Bacurituba, Barra do Corda, Cajapió, Governador Nunes Freire, and Santo Amaro do Maranhão). We show that this species is well distributed in the state. The potential in the epidemiology of avian malaria and arboviruses is discussed briefly in connection with its discovery in Santo Amaro do Maranhão, due to the great number of bird species on Lake Santo Amaro. Finally, we present the known distribution of the species in Brazil.

Research paper thumbnail of Genetic differentiation in natural populations of Lutzomyia longipalpis (Lutz & Neiva) (Diptera: Psychodidae) with different phenotypic spot patterns on tergites in males

Neotropical Entomology, Aug 1, 2011

Entomological surveys in the state of Maranhão have recorded morphologically distinct populations... more Entomological surveys in the state of Maranhão have recorded morphologically distinct populations of Lutzomyia longipalpis (Lutz & Neiva). Some populations have one pair of spots (1S) on the fourth tergite, while others have two pairs (2S) on the third and fourth tergites of males. In the present study we investigated the degree of genetic polymorphism among four populations in the municipalities of Caxias, Codó and Raposa, in the state of Maranhão, Brazil, by using RAPD (Random Ampli ied Polymorphic DNA) markers. A total of 35 loci were identi ied, of which 30 were polymorphic. The highest polymorphism was observed with primer OPA 4, which produced 11 different pro iles. Genetic diversity was assessed using grouping methods that produced a dendrogram in which the genotypes could be clearly separated into two main clades according to the number of spots on the male abdominal tergites. One cluster contained the populations from Caxias and Codó, and the other was formed by the populations from Raposa and Codó. The results of our RAPD analysis showed a clear separation between the populations with one and two pairs of spots. The epidemiologic signi icance of this genetic differentiation should be investigated in future studies.

Research paper thumbnail of Solenopsis saevissima (Smith) (Hymenoptera: Formicidae) Activity Delays Vertebrate Carcass Decomposition

Sociobiology, Oct 17, 2017

In addition to climatic conditions, such as temperature and rainfall, the presence of and ecologi... more In addition to climatic conditions, such as temperature and rainfall, the presence of and ecological interactions between insect guilds play a key role in the decomposition rate of vertebrate carcasses (Simmons et al. 2010; Santos & Alves, 2016). Ants (Hymenoptera: Formicidae) are among the insects involved in decomposition processes, and exhibit both predatory and necrophagous behavior (Carvalho et al. 2004; Cruz & Vasconcelos, 2006). Furthermore, they interact with other arthropods around decomposing bodies (Rámon & Donoso, 2015). Due to their aggressive behavior, ants from the genus Solenopsis can reduce the number of eggs and larvae in cadaver-occupying species, impacting carcass colonization (Stoker et al., 1995) and either accelerating or delaying the rate of decomposition (Andrade-Silva et al. 2015). Therefore, these ants may potentially confound interpretation of the postmortem interval (PMI).

Research paper thumbnail of Temporal Variation in Species Abundance and Richness of Culicoides (Diptera: Ceratopogonidae) in a Tropical Equatorial Area

Journal of Medical Entomology, 2019

The aim of this study was to investigate whether temperature, rainfall, and humidity influence th... more The aim of this study was to investigate whether temperature, rainfall, and humidity influence the annual distribution of Culicoides Latreille 1809, species abundance and richness in rural areas on São Luís Island in the state of Maranhão, Brazil. Biting midges were collected in housing for domestic animals in the peridomestic areas of 10 homes. A CDC light trap was installed in each peridomestic area from 6:00 p.m. to 6:00 a.m. once a month for 12 mo. In total, 23,633 individuals belonging to 26 Culicoides species were captured. The most abundant species were Culicoides diabolicus Hoffman, 1925 (27.43%), C. ignacioi Forattini, 1957 (25.9%), C. flavivenulus Costa Lima, 1937 (15.53%), C. insignis Lutz, 1913 (10.66%), C. filariferus Hoffman, 1939 (6.21%), C. boliviensis Spinelli & Wirth, 1984 (6.07%), C. foxi Ortíz, 1950 (2.83%), and C. leopoldoi Ortíz, 1951 (2.54%). Species richness and abundance were greater during the rainy season (24 species; 88% of the individuals) than during th...

Research paper thumbnail of Occurrence of Phlebotominae (Diptera: Psychodidae) in Urban Leishmaniasis Transmission Foci in North-Eastern Brazil

Journal of Medical Entomology, 2018

In this study, we analyzed species composition, richness, and monthly and seasonal abundance of s... more In this study, we analyzed species composition, richness, and monthly and seasonal abundance of sand flies in an urban area, municipality Caxias, state Maranhão, endemic for American visceral and tegumentary leishmaniasis. Sand flies were caught using Center for Disease Control (CDC) light traps in peridomicile (animal shelter) and extradomicile (forest) environments twice a month for 1 yr. A total of 16,332 specimens belonging to 20 species were captured. The predominant species identified in this study were Lutzomyia longipalpis (Diptera: Psychodidae) (Lutz and Neiva 1912) (43.08%) and Lutzomyia whitmani (Diptera: Psychodidae) (Antunes and Coutinho 1939) (43.02%), which occurred throughout the year (every month). The highest abundance of phlebotomine was recorded during the dry season (53.75%) and in the urban peridomicile environment (59.1%), wherein 17 species were found. In the study area, L. longipalpis and L. whitmani are reported to be effective visceral or tegumentary leishmaniasis vectors, respectively, due to their abundance throughout the year.

Research paper thumbnail of Utilization of trap nests by Euglossini species (Hymenoptera: Apidae)

Research paper thumbnail of An ecological study of sand flies (Diptera: Psychodidae) in the vicinity of Lençóis Maranhenses National Park, Maranhão, Brazil

Parasites & Vectors, Aug 28, 2015

Background: The Lençóis Maranhenses National Park, located in Maranhão, Brazil, is a region of ex... more Background: The Lençóis Maranhenses National Park, located in Maranhão, Brazil, is a region of exceptional beauty and a popular tourist destination. The adjoining area has suffered from the impact of human activity and, consequently, has experienced outbreaks of leishmaniasis. This study aimed to evaluate the composition, abundance, species richness and seasonal distribution of sand flies in the region and to determine the constancy of the insect population. Methods: The survey was conducted at three sites located in the municipalities of Barreirinhas and Santo Amaro between September 2012 and August 2013. Sampling was performed monthly using automatic light traps installed 1.5 m above the soil adjacent to 13 randomly selected rural dwellings. At each site, one trap was placed in the peridomicile near to animal enclosures and another (extradomicile) at 500 m from the peridomicile. Results: A total of 4,474 individual sand flies were collected over the year with the highest abundance recorded during the rainy season (December to June). Nine species were collected: L. whitmani, L. longipalpis, L. lenti, L. sordellii, L. evandroi, L. flaviscutellata, L. wellcomei, L. termitophila and L. intermedia. Although peridomiciliary and extradomiciliary environments presented similar species richness, the Shannon diversity index was significantly lower in the former (H' = 2.4) compared with the latter (H' = 4.98). Lutzomyia whitmani and L. longipalpis were the most abundant species and were classified as constant (constancy index, CI = 100 %) along with L. lenti (CI = 58.3), L. evandroi (CI = 58.3) and L. sordellii (CI = 66.7). The remaining four species presented CI values between 25 and 50 % and were considered accessory. Conclusions: The present results confirm the present of L. whitmani and L. longipalpis in the peridomicile of houses in Lençóis National Park. The abundance of these species could explain, respectively, the endemicity of cutaneous leishmaniasis and sporadic cases of visceral leishmaniasis in the study area. However, in the case of cutaneous leishmaniasis, the presence of other sand fly vectors (in addition to L. whitmani) cannot be neglected. Finally, this study emphasizes the need for a more effective and permanent supervision to control the expansion of these vectors and leishmaniasis outbreaks.

Research paper thumbnail of Ocorrência de flebotomíneos (Diptera, Psychodidae) em focos de leishmanioses, em área de ecoturismo do entorno do Parque Nacional dos Lençóis Maranhenses, Brasil

Cadernos De Saude Publica, 2010

The distribution and relative abundance of sand fly species were studied in the municipality of

Research paper thumbnail of Diversity of Culicoides (Diptera: Ceratopogonidae) in Rural Settlements and Degraded Seasonal Deciduous Forests

Journal of Medical Entomology, 2021

Biting midges are widespread in Brazilian natural ecosystems. However, deforestation and other ac... more Biting midges are widespread in Brazilian natural ecosystems. However, deforestation and other activities that impact the environment are reducing natural habitats where biting midges proliferate. The objective of this study was to verify whether there is variation in the composition, richness, abundance, and seasonality of biting midges between wild and rural environments, in a forest area with intense deforestation. Biting midges were captured using 6 traps installed at an average height of 1.5 m in the peridomicile, intradomicile, and deciduous seasonal forests, once a month from May 2012 to April 2013. In total, 2,182 specimens of 13 species of the genus Culicoides were captured. Species richness was similar in the intradomicile (13 species), forest (12), and peridomicile (11), but species diversity was greater in the peridomicile (H’ = 0.803) compared with the intradomicile (H’ = 0.717) and forest (H’ = 0.687). The order of species dominance varied between the forest (Culicoide...

Research paper thumbnail of Predominance of Leishmania (Leishmania) amazonensis DNA in Lutzomyia longipalpis sand flies (Diptera: Psychodidae) from an endemic area for leishmaniasis in Northeastern Brazil

Revista Do Instituto De Medicina Tropical De Sao Paulo, 2022

This is an open-access article distributed under the terms of the Creative Commons Attribution Li... more This is an open-access article distributed under the terms of the Creative Commons Attribution License.

Research paper thumbnail of Distribuição de Panstrongylus megistus (Hemiptera, Reduviidae, Triatominae) no estado do Maranhão, Brasil

Acta Amazonica, 1999

Apresenta-se a distribuição de Panstrongylus megistus no Estado do Maranhão, com base nos dados d... more Apresenta-se a distribuição de Panstrongylus megistus no Estado do Maranhão, com base nos dados do inquérito triatomínico realizado pela Fundação Nacional de Saúde, de 1982 a 1995. O método básico utilizado foi a captura de adultos e ninfas nos ambientes peri e intradomiciliares. Os trabalhos de coleta dentro das casas começavam pelos cômodos dos fundos, passando de um aposento para o outro, até a frente. Na parte externa das casas foram inspecionados pátio, quintal, jardim e anexos - galinheiro, chiqueiro, estábulo, curral etc. Todos os exemplares encontrados eram capturados, identificados e, quando possível, examinado o conteúdo intestinal para detecção de Trypanosoma. O estudo envolveu 87 dos 136 municípios em que se divide geograficamente o Maranhão. O Panstrongylus megistus encontrava-se confinado em 14 municípios pertencentes à zona dos cerrados que caracterizam a porção mais meridional do Estado. Dos 1.632 exemplares capturados 277 foram examinados, resultando no índice globa...

Research paper thumbnail of Phytogeographic regions and geographic distance do not predict genetic structure in the orchid bee Euglossa cordata

Journal of Apicultural Research

Herein, we investigated the genetic diversity and population structure of <i>Euglos... more Herein, we investigated the genetic diversity and population structure of <i>Euglossa cordata</i> L., an orchid bee species widely distributed at the heterogeneous set of vegetal physiognomies encompassed in a transition zone (TZ) of different Brazilian biomes. We then tested whether phytogeographic regions would play some rule for the genetic diversity. Results revealed that only 12 and 28 out 78 pairs of samples showed some degree of genetic structure for microsatellites (<i>F</i><sub>ST</sub>≤ 0.029; <i>D<sub>est</sub></i>≤0.091; p ST≤ 0.495; p E. cordata may have experienced some local bottlenecks despite its resilience to anthropic interferences. These are the first records of relatively high genetic structure in <i>E. cordata</i> populations and have important implications for orchid bees' conservation.

Research paper thumbnail of DNA Barcoding Culicoides Biting Midges (Diptera: Ceratopogonidae) in Northeast Brazil

Journal of Medical Entomology, Mar 2, 2023

Research paper thumbnail of Detection of Wolbachia in Mosquitoes (Diptera: Culicidae) in the State of Maranhão, Brazil

Journal of Medical Entomology

Recently, the endobacteria Wolbachia has emerged as a biological tool for the control of arboviru... more Recently, the endobacteria Wolbachia has emerged as a biological tool for the control of arboviruses. Thus, we investigated the rate of natural infection by Wolbachia in Culicidae species from Maranhão, Brazil. For this, we amplified the Wolbachia surface protein gene (wsp) from mosquitoes collected in six localities of Maranhão, and positive samples were subjected to new analysis using group-specific primers. In total, 448 specimens comprising 6 genera and 18 species of mosquitoes were analyzed. Wolbachia DNA was PCR-detected in 7 species, three of which are new records: Aedes scapularis (Rondani, 1848), Coquillettidia juxtamansonia (Chagas, 1907) and Cq. venezuelensis (Theobald, 1912), in addition to Ae. albopictus (Skuse, 1894) and Culex quinquefasciatus Say, 1823, which are commonly described as permissive to maintain this bacterium in natural environments, and two species of the subgenera Anopheles (Nyssorhynchus) Blanchard, 1902 and Culex (Melanoconion) Theobald, 1903 which co...

Research paper thumbnail of SOROPREVALÊNCIA, ASPECTOS CLÍNICOS E BIOQUÍMICOS DA INFECÇÃO POR Leishmania EM CÃES NATURALMENTE INFECTADOS E FAUNA DE FLEBOTOMÍNEOS EM UMA ÁREA ENDÊMICA NA ILHA DE SÃO LUÍS, MARANHÃO, BRASIL

Revista Brasileira De Parasitologia Veterinaria, 2008

ABREU-SILVA, A.L.; LIMA, T.B.; DE MACEDO, AA.; MORAES-JÚNIOR, F. DE J.; DIAS, E.L.; BATISTA, Z. D... more ABREU-SILVA, A.L.; LIMA, T.B.; DE MACEDO, AA.; MORAES-JÚNIOR, F. DE J.; DIAS, E.L.; BATISTA, Z. DA S.; CALABRESE, K. DA S.; MORAES, J.L.P.; REBÊLO, J.M.M.; GUERRA, R.M.S.N. DE C. [Seroprevalence, clinical and biochemical data of dogs naturally infected by Leishmania and phlebotominae sandfly fauna in an endemic area in São Luis Island, Maranhão State, Brazil]. Soroprevalência, aspectos clínicos e bioquímicos da infecção por Leishmania em cães naturalmente infectados e fauna de flebotomíneos em uma área endêmica na ilha de São Luís, Maranhão, Brasil. Revista Brasileira de Parasitologia Veterinária, v. 17, supl. 1, p. 197-203, 2008. Departamento de Patologia, Universidade Estadual do Maranhão, Cidade Universitária Paulo VI, Caixa Postal 09, Tirirical, São Luís, MA 65055-970, Brasil. E-mail: anabreu@ioc.fiocruz.br The aim of this study was to determine the seroprevalence, clinical and biochemical profile of Leishmania chagasi infection in dogs naturally infected and identify the phlebo...

Research paper thumbnail of Orchid bees (Apidae: Euglossini) in Cerrado remnants in northeast Brazil

Journal of Natural History, 2018

There is a general lack of information concerning the diversity of bees belonging to the Euglossi... more There is a general lack of information concerning the diversity of bees belonging to the Euglossini tribe in Cerrado areas closest to the Brazilian Amazon. The state of Maranhão is situated in the northeast Brazilian Cerrado and has become the agricultural frontier of the country due to the advancement of monoculture and cattle farming. These activities have suppressed animal and plant populations in large areas of the Cerrado remnants, for which we have not yet obtained adequate scientific knowledge of local species. The objective of this study was to conduct a survey of Euglossini fauna in the northeast Cerrado. We evaluated the variation in species richness, composition and abundance between two distinct vegetation types: Cerrado sensu stricto (s.s.) and gallery forest. Male bees were captured from 7:00 a.m. to 5:00 p.m. over two consecutive days. Captures were carried out once per month from July 2012 to December 2013, using a combination of passive and active collection techniques, including baited traps, as well as a collector with an entomological net to collect bees near traps. We collected a total of 766 Euglossini males belonging to 24 species and five genera. The most abundant species were Eulaema bombiformis, Eulaema nigrita and Eulaema cingulata for the gallery forest site, whereas Eulaema nigrita, Euglossa melanotricha and Euglossa cordata were more abundant in the Cerrado s.s. The gallery forest yielded a higher number of male Euglossini (n = 503, 21 species) compared with the Cerrado s.s. (n = 263, 16 species). The presence of seven exclusive species in the gallery forest and three in the Cerrado s.s. indicated that both environments are important for the maintenance of Euglossini species in this region and highlight the increasing need for conservation programmes for the protection of Cerrado environments.

Research paper thumbnail of Detection of Leishmania DNA and Blood Meal Identification in Sand Flies (Diptera: Psychodidae) From Lençois Maranhenses National Park Region, Brazil

Journal of medical entomology, Jan 21, 2017

To elucidate portions of the transmission cycles of American tegumentary leishmaniasis (TL) and v... more To elucidate portions of the transmission cycles of American tegumentary leishmaniasis (TL) and visceral leishmaniasis (VL) occurring in the region surrounding the Lençóis Maranhenses National Park, an important tourist center in Brazil, the present study objectives were to determine the rate of natural infection by Leishmania spp. and the blood meal in caught sand flies species in the region. Sand flies were captured over 36 mo in 62 locations of the municipality of Barreirinhas, Maranhão with notifications of disease incidence. Species identification of parasites was performed with internal transcribed spacer 1 (ITS1) PCR-RFLP using HaeIII enzyme. Blood meal identification was performed with cytochrome b (cytb) gene PCR-RFLP using HaeIII and MboI enzyme. The species Lutzomyia longipalpis (Lutz and Neiva 1912) presented a positivity rate of 3.7% for Leishmania infantum. Species not considered vectors of this parasite such as Lu. lenti (Mangabeira 1938) and Lu. whitmani (Antunes & C...

Research paper thumbnail of Infestation of Brazilian Peridomiciliary Areas by Culicoides (Diptera: Ceratopogonidae) in Humid and Semihumid Climates

Journal of medical entomology, Jan 24, 2016

This study investigates Culicoides infestation in peridomestic environments in two villages in Ma... more This study investigates Culicoides infestation in peridomestic environments in two villages in Maranhão, one with hot and humid climate and the other with semihumid climate. We evaluated the composition, richness, abundance, and seasonality of species. We captured insects using CDC light traps installed in animal shelters once a month, from 6 pm to 6 am, for 24 mo (May 2012 to April 2014). In this study, 17 species were found. Of these, 10 occurred simultaneously in two areas; six were found only in hot and humid area, while one occurred only in the semihumid area. Species richness was higher in the hot and humid climate (16 species) than in the semihumid (11 species). The rank of abundance was uneven across areas: C. foxi, C. insignis, C. filariferus, C. ignacioi, and C. flavivenula were dominant in the hot and humid area, and C. ignacioi, C. foxi, C. filariferus, C. insignis, and C. boliviensis in the semihumid. Midges were more abundant in the rainy season in both areas. This res...

Research paper thumbnail of First record of Aglae caerulea (Hymenoptera, Apidae, Euglossini) in Brazilian Cerrado east of the Amazon Region, Maranhão State, Brazil

Brazilian journal of biology = Revista brasleira de biologia, Jan 8, 2016

Research paper thumbnail of Vertical stratification of sand flies (Diptera: Psychodidae) in riparian forests between the Amazon and northeast Brazil

Journal of Vector Ecology, 2015

Research paper thumbnail of First record of Aedeomyia squamipennis (Lynch Arribálzaga, 1878) (Diptera: Culicidae) in the state of Maranhão: epidemiological implications and distribution in Brazil

Check List, Apr 4, 2017

We record Aedeomyia squamipennis from the state of Maranhão, Brazil (municipalities of Bacurituba... more We record Aedeomyia squamipennis from the state of Maranhão, Brazil (municipalities of Bacurituba, Barra do Corda, Cajapió, Governador Nunes Freire, and Santo Amaro do Maranhão). We show that this species is well distributed in the state. The potential in the epidemiology of avian malaria and arboviruses is discussed briefly in connection with its discovery in Santo Amaro do Maranhão, due to the great number of bird species on Lake Santo Amaro. Finally, we present the known distribution of the species in Brazil.

Research paper thumbnail of Genetic differentiation in natural populations of Lutzomyia longipalpis (Lutz & Neiva) (Diptera: Psychodidae) with different phenotypic spot patterns on tergites in males

Neotropical Entomology, Aug 1, 2011

Entomological surveys in the state of Maranhão have recorded morphologically distinct populations... more Entomological surveys in the state of Maranhão have recorded morphologically distinct populations of Lutzomyia longipalpis (Lutz & Neiva). Some populations have one pair of spots (1S) on the fourth tergite, while others have two pairs (2S) on the third and fourth tergites of males. In the present study we investigated the degree of genetic polymorphism among four populations in the municipalities of Caxias, Codó and Raposa, in the state of Maranhão, Brazil, by using RAPD (Random Ampli ied Polymorphic DNA) markers. A total of 35 loci were identi ied, of which 30 were polymorphic. The highest polymorphism was observed with primer OPA 4, which produced 11 different pro iles. Genetic diversity was assessed using grouping methods that produced a dendrogram in which the genotypes could be clearly separated into two main clades according to the number of spots on the male abdominal tergites. One cluster contained the populations from Caxias and Codó, and the other was formed by the populations from Raposa and Codó. The results of our RAPD analysis showed a clear separation between the populations with one and two pairs of spots. The epidemiologic signi icance of this genetic differentiation should be investigated in future studies.

Research paper thumbnail of Solenopsis saevissima (Smith) (Hymenoptera: Formicidae) Activity Delays Vertebrate Carcass Decomposition

Sociobiology, Oct 17, 2017

In addition to climatic conditions, such as temperature and rainfall, the presence of and ecologi... more In addition to climatic conditions, such as temperature and rainfall, the presence of and ecological interactions between insect guilds play a key role in the decomposition rate of vertebrate carcasses (Simmons et al. 2010; Santos & Alves, 2016). Ants (Hymenoptera: Formicidae) are among the insects involved in decomposition processes, and exhibit both predatory and necrophagous behavior (Carvalho et al. 2004; Cruz & Vasconcelos, 2006). Furthermore, they interact with other arthropods around decomposing bodies (Rámon & Donoso, 2015). Due to their aggressive behavior, ants from the genus Solenopsis can reduce the number of eggs and larvae in cadaver-occupying species, impacting carcass colonization (Stoker et al., 1995) and either accelerating or delaying the rate of decomposition (Andrade-Silva et al. 2015). Therefore, these ants may potentially confound interpretation of the postmortem interval (PMI).

Research paper thumbnail of Temporal Variation in Species Abundance and Richness of Culicoides (Diptera: Ceratopogonidae) in a Tropical Equatorial Area

Journal of Medical Entomology, 2019

The aim of this study was to investigate whether temperature, rainfall, and humidity influence th... more The aim of this study was to investigate whether temperature, rainfall, and humidity influence the annual distribution of Culicoides Latreille 1809, species abundance and richness in rural areas on São Luís Island in the state of Maranhão, Brazil. Biting midges were collected in housing for domestic animals in the peridomestic areas of 10 homes. A CDC light trap was installed in each peridomestic area from 6:00 p.m. to 6:00 a.m. once a month for 12 mo. In total, 23,633 individuals belonging to 26 Culicoides species were captured. The most abundant species were Culicoides diabolicus Hoffman, 1925 (27.43%), C. ignacioi Forattini, 1957 (25.9%), C. flavivenulus Costa Lima, 1937 (15.53%), C. insignis Lutz, 1913 (10.66%), C. filariferus Hoffman, 1939 (6.21%), C. boliviensis Spinelli & Wirth, 1984 (6.07%), C. foxi Ortíz, 1950 (2.83%), and C. leopoldoi Ortíz, 1951 (2.54%). Species richness and abundance were greater during the rainy season (24 species; 88% of the individuals) than during th...

Research paper thumbnail of Occurrence of Phlebotominae (Diptera: Psychodidae) in Urban Leishmaniasis Transmission Foci in North-Eastern Brazil

Journal of Medical Entomology, 2018

In this study, we analyzed species composition, richness, and monthly and seasonal abundance of s... more In this study, we analyzed species composition, richness, and monthly and seasonal abundance of sand flies in an urban area, municipality Caxias, state Maranhão, endemic for American visceral and tegumentary leishmaniasis. Sand flies were caught using Center for Disease Control (CDC) light traps in peridomicile (animal shelter) and extradomicile (forest) environments twice a month for 1 yr. A total of 16,332 specimens belonging to 20 species were captured. The predominant species identified in this study were Lutzomyia longipalpis (Diptera: Psychodidae) (Lutz and Neiva 1912) (43.08%) and Lutzomyia whitmani (Diptera: Psychodidae) (Antunes and Coutinho 1939) (43.02%), which occurred throughout the year (every month). The highest abundance of phlebotomine was recorded during the dry season (53.75%) and in the urban peridomicile environment (59.1%), wherein 17 species were found. In the study area, L. longipalpis and L. whitmani are reported to be effective visceral or tegumentary leishmaniasis vectors, respectively, due to their abundance throughout the year.

Research paper thumbnail of Utilization of trap nests by Euglossini species (Hymenoptera: Apidae)

Research paper thumbnail of An ecological study of sand flies (Diptera: Psychodidae) in the vicinity of Lençóis Maranhenses National Park, Maranhão, Brazil

Parasites & Vectors, Aug 28, 2015

Background: The Lençóis Maranhenses National Park, located in Maranhão, Brazil, is a region of ex... more Background: The Lençóis Maranhenses National Park, located in Maranhão, Brazil, is a region of exceptional beauty and a popular tourist destination. The adjoining area has suffered from the impact of human activity and, consequently, has experienced outbreaks of leishmaniasis. This study aimed to evaluate the composition, abundance, species richness and seasonal distribution of sand flies in the region and to determine the constancy of the insect population. Methods: The survey was conducted at three sites located in the municipalities of Barreirinhas and Santo Amaro between September 2012 and August 2013. Sampling was performed monthly using automatic light traps installed 1.5 m above the soil adjacent to 13 randomly selected rural dwellings. At each site, one trap was placed in the peridomicile near to animal enclosures and another (extradomicile) at 500 m from the peridomicile. Results: A total of 4,474 individual sand flies were collected over the year with the highest abundance recorded during the rainy season (December to June). Nine species were collected: L. whitmani, L. longipalpis, L. lenti, L. sordellii, L. evandroi, L. flaviscutellata, L. wellcomei, L. termitophila and L. intermedia. Although peridomiciliary and extradomiciliary environments presented similar species richness, the Shannon diversity index was significantly lower in the former (H' = 2.4) compared with the latter (H' = 4.98). Lutzomyia whitmani and L. longipalpis were the most abundant species and were classified as constant (constancy index, CI = 100 %) along with L. lenti (CI = 58.3), L. evandroi (CI = 58.3) and L. sordellii (CI = 66.7). The remaining four species presented CI values between 25 and 50 % and were considered accessory. Conclusions: The present results confirm the present of L. whitmani and L. longipalpis in the peridomicile of houses in Lençóis National Park. The abundance of these species could explain, respectively, the endemicity of cutaneous leishmaniasis and sporadic cases of visceral leishmaniasis in the study area. However, in the case of cutaneous leishmaniasis, the presence of other sand fly vectors (in addition to L. whitmani) cannot be neglected. Finally, this study emphasizes the need for a more effective and permanent supervision to control the expansion of these vectors and leishmaniasis outbreaks.

Research paper thumbnail of Ocorrência de flebotomíneos (Diptera, Psychodidae) em focos de leishmanioses, em área de ecoturismo do entorno do Parque Nacional dos Lençóis Maranhenses, Brasil

Cadernos De Saude Publica, 2010

The distribution and relative abundance of sand fly species were studied in the municipality of

Research paper thumbnail of Diversity of Culicoides (Diptera: Ceratopogonidae) in Rural Settlements and Degraded Seasonal Deciduous Forests

Journal of Medical Entomology, 2021

Biting midges are widespread in Brazilian natural ecosystems. However, deforestation and other ac... more Biting midges are widespread in Brazilian natural ecosystems. However, deforestation and other activities that impact the environment are reducing natural habitats where biting midges proliferate. The objective of this study was to verify whether there is variation in the composition, richness, abundance, and seasonality of biting midges between wild and rural environments, in a forest area with intense deforestation. Biting midges were captured using 6 traps installed at an average height of 1.5 m in the peridomicile, intradomicile, and deciduous seasonal forests, once a month from May 2012 to April 2013. In total, 2,182 specimens of 13 species of the genus Culicoides were captured. Species richness was similar in the intradomicile (13 species), forest (12), and peridomicile (11), but species diversity was greater in the peridomicile (H’ = 0.803) compared with the intradomicile (H’ = 0.717) and forest (H’ = 0.687). The order of species dominance varied between the forest (Culicoide...

Research paper thumbnail of Predominance of Leishmania (Leishmania) amazonensis DNA in Lutzomyia longipalpis sand flies (Diptera: Psychodidae) from an endemic area for leishmaniasis in Northeastern Brazil

Revista Do Instituto De Medicina Tropical De Sao Paulo, 2022

This is an open-access article distributed under the terms of the Creative Commons Attribution Li... more This is an open-access article distributed under the terms of the Creative Commons Attribution License.

Research paper thumbnail of Distribuição de Panstrongylus megistus (Hemiptera, Reduviidae, Triatominae) no estado do Maranhão, Brasil

Acta Amazonica, 1999

Apresenta-se a distribuição de Panstrongylus megistus no Estado do Maranhão, com base nos dados d... more Apresenta-se a distribuição de Panstrongylus megistus no Estado do Maranhão, com base nos dados do inquérito triatomínico realizado pela Fundação Nacional de Saúde, de 1982 a 1995. O método básico utilizado foi a captura de adultos e ninfas nos ambientes peri e intradomiciliares. Os trabalhos de coleta dentro das casas começavam pelos cômodos dos fundos, passando de um aposento para o outro, até a frente. Na parte externa das casas foram inspecionados pátio, quintal, jardim e anexos - galinheiro, chiqueiro, estábulo, curral etc. Todos os exemplares encontrados eram capturados, identificados e, quando possível, examinado o conteúdo intestinal para detecção de Trypanosoma. O estudo envolveu 87 dos 136 municípios em que se divide geograficamente o Maranhão. O Panstrongylus megistus encontrava-se confinado em 14 municípios pertencentes à zona dos cerrados que caracterizam a porção mais meridional do Estado. Dos 1.632 exemplares capturados 277 foram examinados, resultando no índice globa...

Research paper thumbnail of Phytogeographic regions and geographic distance do not predict genetic structure in the orchid bee Euglossa cordata

Journal of Apicultural Research

Herein, we investigated the genetic diversity and population structure of <i>Euglos... more Herein, we investigated the genetic diversity and population structure of <i>Euglossa cordata</i> L., an orchid bee species widely distributed at the heterogeneous set of vegetal physiognomies encompassed in a transition zone (TZ) of different Brazilian biomes. We then tested whether phytogeographic regions would play some rule for the genetic diversity. Results revealed that only 12 and 28 out 78 pairs of samples showed some degree of genetic structure for microsatellites (<i>F</i><sub>ST</sub>≤ 0.029; <i>D<sub>est</sub></i>≤0.091; p ST≤ 0.495; p E. cordata may have experienced some local bottlenecks despite its resilience to anthropic interferences. These are the first records of relatively high genetic structure in <i>E. cordata</i> populations and have important implications for orchid bees' conservation.

Research paper thumbnail of DNA Barcoding Culicoides Biting Midges (Diptera: Ceratopogonidae) in Northeast Brazil

Journal of Medical Entomology, Mar 2, 2023

Research paper thumbnail of Detection of Wolbachia in Mosquitoes (Diptera: Culicidae) in the State of Maranhão, Brazil

Journal of Medical Entomology

Recently, the endobacteria Wolbachia has emerged as a biological tool for the control of arboviru... more Recently, the endobacteria Wolbachia has emerged as a biological tool for the control of arboviruses. Thus, we investigated the rate of natural infection by Wolbachia in Culicidae species from Maranhão, Brazil. For this, we amplified the Wolbachia surface protein gene (wsp) from mosquitoes collected in six localities of Maranhão, and positive samples were subjected to new analysis using group-specific primers. In total, 448 specimens comprising 6 genera and 18 species of mosquitoes were analyzed. Wolbachia DNA was PCR-detected in 7 species, three of which are new records: Aedes scapularis (Rondani, 1848), Coquillettidia juxtamansonia (Chagas, 1907) and Cq. venezuelensis (Theobald, 1912), in addition to Ae. albopictus (Skuse, 1894) and Culex quinquefasciatus Say, 1823, which are commonly described as permissive to maintain this bacterium in natural environments, and two species of the subgenera Anopheles (Nyssorhynchus) Blanchard, 1902 and Culex (Melanoconion) Theobald, 1903 which co...

Research paper thumbnail of SOROPREVALÊNCIA, ASPECTOS CLÍNICOS E BIOQUÍMICOS DA INFECÇÃO POR Leishmania EM CÃES NATURALMENTE INFECTADOS E FAUNA DE FLEBOTOMÍNEOS EM UMA ÁREA ENDÊMICA NA ILHA DE SÃO LUÍS, MARANHÃO, BRASIL

Revista Brasileira De Parasitologia Veterinaria, 2008

ABREU-SILVA, A.L.; LIMA, T.B.; DE MACEDO, AA.; MORAES-JÚNIOR, F. DE J.; DIAS, E.L.; BATISTA, Z. D... more ABREU-SILVA, A.L.; LIMA, T.B.; DE MACEDO, AA.; MORAES-JÚNIOR, F. DE J.; DIAS, E.L.; BATISTA, Z. DA S.; CALABRESE, K. DA S.; MORAES, J.L.P.; REBÊLO, J.M.M.; GUERRA, R.M.S.N. DE C. [Seroprevalence, clinical and biochemical data of dogs naturally infected by Leishmania and phlebotominae sandfly fauna in an endemic area in São Luis Island, Maranhão State, Brazil]. Soroprevalência, aspectos clínicos e bioquímicos da infecção por Leishmania em cães naturalmente infectados e fauna de flebotomíneos em uma área endêmica na ilha de São Luís, Maranhão, Brasil. Revista Brasileira de Parasitologia Veterinária, v. 17, supl. 1, p. 197-203, 2008. Departamento de Patologia, Universidade Estadual do Maranhão, Cidade Universitária Paulo VI, Caixa Postal 09, Tirirical, São Luís, MA 65055-970, Brasil. E-mail: anabreu@ioc.fiocruz.br The aim of this study was to determine the seroprevalence, clinical and biochemical profile of Leishmania chagasi infection in dogs naturally infected and identify the phlebo...

Research paper thumbnail of Orchid bees (Apidae: Euglossini) in Cerrado remnants in northeast Brazil

Journal of Natural History, 2018

There is a general lack of information concerning the diversity of bees belonging to the Euglossi... more There is a general lack of information concerning the diversity of bees belonging to the Euglossini tribe in Cerrado areas closest to the Brazilian Amazon. The state of Maranhão is situated in the northeast Brazilian Cerrado and has become the agricultural frontier of the country due to the advancement of monoculture and cattle farming. These activities have suppressed animal and plant populations in large areas of the Cerrado remnants, for which we have not yet obtained adequate scientific knowledge of local species. The objective of this study was to conduct a survey of Euglossini fauna in the northeast Cerrado. We evaluated the variation in species richness, composition and abundance between two distinct vegetation types: Cerrado sensu stricto (s.s.) and gallery forest. Male bees were captured from 7:00 a.m. to 5:00 p.m. over two consecutive days. Captures were carried out once per month from July 2012 to December 2013, using a combination of passive and active collection techniques, including baited traps, as well as a collector with an entomological net to collect bees near traps. We collected a total of 766 Euglossini males belonging to 24 species and five genera. The most abundant species were Eulaema bombiformis, Eulaema nigrita and Eulaema cingulata for the gallery forest site, whereas Eulaema nigrita, Euglossa melanotricha and Euglossa cordata were more abundant in the Cerrado s.s. The gallery forest yielded a higher number of male Euglossini (n = 503, 21 species) compared with the Cerrado s.s. (n = 263, 16 species). The presence of seven exclusive species in the gallery forest and three in the Cerrado s.s. indicated that both environments are important for the maintenance of Euglossini species in this region and highlight the increasing need for conservation programmes for the protection of Cerrado environments.

Research paper thumbnail of Detection of Leishmania DNA and Blood Meal Identification in Sand Flies (Diptera: Psychodidae) From Lençois Maranhenses National Park Region, Brazil

Journal of medical entomology, Jan 21, 2017

To elucidate portions of the transmission cycles of American tegumentary leishmaniasis (TL) and v... more To elucidate portions of the transmission cycles of American tegumentary leishmaniasis (TL) and visceral leishmaniasis (VL) occurring in the region surrounding the Lençóis Maranhenses National Park, an important tourist center in Brazil, the present study objectives were to determine the rate of natural infection by Leishmania spp. and the blood meal in caught sand flies species in the region. Sand flies were captured over 36 mo in 62 locations of the municipality of Barreirinhas, Maranhão with notifications of disease incidence. Species identification of parasites was performed with internal transcribed spacer 1 (ITS1) PCR-RFLP using HaeIII enzyme. Blood meal identification was performed with cytochrome b (cytb) gene PCR-RFLP using HaeIII and MboI enzyme. The species Lutzomyia longipalpis (Lutz and Neiva 1912) presented a positivity rate of 3.7% for Leishmania infantum. Species not considered vectors of this parasite such as Lu. lenti (Mangabeira 1938) and Lu. whitmani (Antunes & C...

Research paper thumbnail of Infestation of Brazilian Peridomiciliary Areas by Culicoides (Diptera: Ceratopogonidae) in Humid and Semihumid Climates

Journal of medical entomology, Jan 24, 2016

This study investigates Culicoides infestation in peridomestic environments in two villages in Ma... more This study investigates Culicoides infestation in peridomestic environments in two villages in Maranhão, one with hot and humid climate and the other with semihumid climate. We evaluated the composition, richness, abundance, and seasonality of species. We captured insects using CDC light traps installed in animal shelters once a month, from 6 pm to 6 am, for 24 mo (May 2012 to April 2014). In this study, 17 species were found. Of these, 10 occurred simultaneously in two areas; six were found only in hot and humid area, while one occurred only in the semihumid area. Species richness was higher in the hot and humid climate (16 species) than in the semihumid (11 species). The rank of abundance was uneven across areas: C. foxi, C. insignis, C. filariferus, C. ignacioi, and C. flavivenula were dominant in the hot and humid area, and C. ignacioi, C. foxi, C. filariferus, C. insignis, and C. boliviensis in the semihumid. Midges were more abundant in the rainy season in both areas. This res...

Research paper thumbnail of First record of Aglae caerulea (Hymenoptera, Apidae, Euglossini) in Brazilian Cerrado east of the Amazon Region, Maranhão State, Brazil

Brazilian journal of biology = Revista brasleira de biologia, Jan 8, 2016

Research paper thumbnail of Vertical stratification of sand flies (Diptera: Psychodidae) in riparian forests between the Amazon and northeast Brazil

Journal of Vector Ecology, 2015