Claudio José Von Zuben - Academia.edu (original) (raw)

Papers by Claudio José Von Zuben

In this paper we present a mathematical model for the type of dispersal concerned relates to diss... more In this paper we present a mathematical model for the type of dispersal concerned relates to dissemination of postfeeding larvae from the centre of the substrate, searching for a suitable site of pupation, where the spatial scale of dispersal is very small, of the order of a few meters.

Neotropical Entomology, 2012

Dipteran blowflies (Calliphoridae) are of great medical and hygienic importance as vectors of pat... more Dipteran blowflies (Calliphoridae) are of great medical and hygienic importance as vectors of pathogens and as parasites of living and dead tissue, and their association with carrion allows their use in forensic entomology. The objective of this study was to determine the synanthropic index of adult Calliphoridae (Diptera) collected in Rio Claro, São Paulo. Sampling occurred between September 2009 and August 2010. Traps baited with sardines, beef liver, and minced meat were assessed for five consecutive days per month in three distinct ecological areas representing urban, rural, and forest environments. The most abundant species was Lucilia eximia (Wiedemann), followed by Chrysomya albiceps (Wiedemann) and Chrysomya megacephala (Fabricius). Lucilia eximia was the only species present in all seasons and the only species collected during the winter. The season with the lowest abundance was winter, with 69 (5.5%) specimens, and spring was the season with the greatest number of specimens collected (774-61.8%). The only species found outside inhabited areas (synanthropic) was Lucilia cuprina (Wiedemann), with a synanthropy index (SI) value of +5.7. The SI values for the other species were negative, showing a preference for uninhabited areas. The rural and urban areas were most similar in terms of species composition as were the beef and sardine baits. Among the baits used, liver attracted the greatest abundance of calliphorids, whereas minced meat attracted the greatest diversity.

Journal of Vector Ecology, 2013

Because of the high adaptive capacity of mosquitoes, studies that focus on transitional environme... more Because of the high adaptive capacity of mosquitoes, studies that focus on transitional environments become very important, such as those in rural areas, which are considered as bridges between wild diseases and human populations of urban areas. In this study, a survey of the existing species of mosquitoes was performed in an Atlantic Forest area of the city of Santa Bárbara d'Oeste, São Paulo state, Brazil, using traps for immatures and analyzing the frequency and distribution of these insects over the sampling months. Five mosquito species were found: Aedes albopictus (the most frequent species), Aedes aegypti, Aedes fluviatilis, Culex quinquefasciatus, and Toxorhynchites theobaldi. The 4,524 eggs collected in ovitraps showed the presence of the tribe Aedini. Aedes aegypti and Ae. albopictus were identified after larval hatching in the laboratory, with different spatial distributions: the first of which coincides with the area of greatest diversity calculated using the Simpson index, while the second does not. The association of ecological analysis of spatial diversity with simple methods of data collection enables the identification of possible epidemiological risk situations and is a strategy that may be implemented to monitor ecological processes resulting from the interaction among different species of mosquitoes.

Journal of Forensic Sciences, 2009

Journal of Applied Entomology, 1993

... Zusammenfassung. Populationsdynamik von Chrysomya putoria (Wied.) (Dipt., Calliphoridae). ...... more ... Zusammenfassung. Populationsdynamik von Chrysomya putoria (Wied.) (Dipt., Calliphoridae). ... n t + 1 = 1/2 F(n t )S(n t )n t. Das dynamische Verhalten dieser Gleichung wurde festgesetzt, um die natürliche Populations-dynamik von C. putoria herzuleiten. ...

... André Antonio Cutolo1,2* Marcella Zampoli Troncarelli3 Juliana Giantomassi Machado3 Maria Cec... more ... André Antonio Cutolo1,2* Marcella Zampoli Troncarelli3 Juliana Giantomassi Machado3 Maria Cecília Rui Luvizotto4 Claudio José Von Zuben5 Helio ... 9). Faz divisa com as cidades de Campinas, Hortolândia, Santa Bárbara D'Oeste, Sumaré, Indaiatuba, Elias Fausto e Capivari ...

Quando se considera a historia da ecologia, e pouco conhecido o papel de alguns pesquisadores no ... more Quando se considera a historia da ecologia, e pouco conhecido o papel de alguns pesquisadores no desenvolvimento mundial desse ramo da ciencia. Dentro desse contexto, e importante ressaltar o trabalho pioneiro do biologista dinamarques Eugen Warming, autor do primeiro livro no mundo devotado especificamente a ecologia, publicado em 1895. Um detalhe interessante e o fato desse pesquisador ter iniciado sua carreira no Brasil, tendo trabalhado em Lagoa Santa, a 40 Km de Belo Horizonte, de 1863 a 1866, pesquisando a vegetacao da regiao. Seu trabalho pioneiro combinou sistematica, taxonomia, morfologia e biogeografia, sintetizando-as em uma nova ciencia chamada ecologia. Ele formalizou a ideia de que uma comunidade natural e composta e caracterizada pelas especies individuais que nela ocorrem. Eugen Warming e considerado o pai da ecologia vegetal e o fundador da ecologia nos tropicos.

Dialogues in Health, 2022

O municipio de Santa Barbara d.Oeste - SP vem sendo assolado por sucessivas epidemias de Dengue n... more O municipio de Santa Barbara d.Oeste - SP vem sendo assolado por sucessivas epidemias de Dengue nos ultimos 19 anos.Em virtude desta problematica, este trabalho tem por objetivo analisar os fatores epidemiologicos envolvidos na transmissao do dengue, no municipio de Santa Barbara d.Oeste, no periodo de 1995 a 2010. Para efetuar tal procedimento foram utilizados procedimentos geoestatisticos, que possibilitaram a visualizacao de cenarios da evolucao desta epidemia.Os resultados mostram que a dengue possui duas areas de risco bem proeminentes. ma delas esta localizada a nordeste da cidade e a outra na porcao centro-sul.

Dengue fever has become a cause for extreme concern worldwide in recent years because with about ... more Dengue fever has become a cause for extreme concern worldwide in recent years because with about millions of people infected for year, threatening 2.5 million people and resulting in the hospitalization of 500,000 for year. This epidemic is considered the most important arboviral disease that affects humans. In the Sao Paulo State, the infestation by the vector occurred in 1985, and the weather conditions and synanthropic environment provided ideal conditions for the proliferation of Aedes aegypti and later, in 1990, to the circulation of the dengue virus. Based on this perspective the objective of this paper is making a diagnosis of temporal evolution of the dengue fever epidemic in Rio Claro - SP, for the period from 1996 to 2010.

Applied Microbiology and Biotechnology, 2021

The diseases transmitted by mosquito vectors are a great public health issue. Thus, effective vec... more The diseases transmitted by mosquito vectors are a great public health issue. Thus, effective vector control becomes the main strategy to reduce their prevalence. However, insecticide resistance has become a huge concern for the mitigation of mosquitoes; here, we propose the use of rhamnolipids in emulsion with clove oil against Aedes aegypti and Culex quinquefasciatus. The toxicity of rhamnolipids and clove oil to two species of mosquitoes transmitting tropical diseases was investigated. After 24 h, the LC50 was 140 mg/L when rhamnolipids were used and 154 mg/L when clove oil was used against Aedes aegypti larvae. In the case of Culex quinquefasciatus, the LC50 was 130 mg/L for rhamnolipids and 19 mg/L for clove oil. When the concentrations of the upper limits of one of the solutions (rhamnolipid or clove oil) were mixed, 100% mortality was obtained after 24 h. The bioassay of insecticidal action for solutions of rhamnolipids and clove oil in the lower limit, upper limit, and lethal concentration 50 to determine the effect on 50% of the population (KD50) achieved low results from KD50 to the upper limit compared to the other concentrations for both Aedes aegypti and Culex quinquefasciatus. The rhamnolipids and clove oil at the upper limit concentration had the greatest repellent activity against the two mosquito species. Bioassays using different concentrations of rhamnolipids revealed variations in the morphology of the intestinal epithelium (800 mg/L). A concentration of 900 mg/L led to the most severe morphological changes in the organization of the epithelium and the cells lining the intestines of these larvae. When larvae were exposed to a concentration of 1000 mg/L, the marginalization of chromatin in the nucleus of epithelial cells was very severe, indicating the onset of cell death.Key points• The toxicity of rhamnolipids and clove oil has a larvicidal, insecticidal, and repellent effect.• The combination of concentrations of these compounds enhances their action.• Different concentrations of rhamnolipids led to severe morphological changes in the organization of the epithelium and the cells and the intestines of larvae.

PloS one, 2017

Biosurfactants are microbial metabolites with possible applications in various industrial sectors... more Biosurfactants are microbial metabolites with possible applications in various industrial sectors that are considered ecofriendly molecules. In recent years, some studies identified these compounds as alternatives for the elimination of vectors of tropical diseases, such as Aedes aegypti. The major bottlenecks of biosurfactant industrial production have been the use of conventional raw materials that increase production costs as well as opportunistic or pathogenic bacteria, which restrict the application of these biomolecules. The present study shows the potential of hemicellulosic sugarcane bagasse hydrolysate as a raw material for the production of a crystalline glycolipidic BS by Scheffersomyces stipitis NRRL Y-7124, which resulted in an emulsifying index (EI24) of 70 ± 3.4% and a superficial tension of 52 ± 2.9 mN.m-1. Additionally, a possible new application of these compounds as biolarvicides, mainly against A. aegypti, was evaluated. At a concentration of 800 mg.L-1, the prod...

Bepa Boletim Epidemiologico Paulista, Aug 1, 2012

Lecture Notes in Computer Science, 2015

Based solely on the dengue confirmed-cases of six densely populated urban areas in Brazil, distri... more Based solely on the dengue confirmed-cases of six densely populated urban areas in Brazil, distributed along the country, we propose in this paper regularized linear and nonlinear autoregressive models for one-week ahead prediction of the future behaviour of each time series. Though exhibiting distinct temporal behaviour, all the time series were properly predicted, with a consistently better performance of the nonlinear predictors, based on MLP neural networks. Additional local information associated with environmental conditions will possibly improve the performance of the predictors. However, without including such local environmental variables, such as temperature and rainfall, the performance was proven to be acceptable and the applicability of the methodology can then be directly extended to endemic areas around the world characterized by a poor monitoring of environmental conditions. For tropical countries, predicting the short-term evolution of dengue confirmed-cases may represent a decisive feedback to guide the definition of effective sanitary policies.

O crescimento das áreas urbanas tem alterado as condições climáticas das cidades. Muitos estudos ... more O crescimento das áreas urbanas tem alterado as condições climáticas das cidades. Muitos estudos sugerem que tais modificações têm proporcionado o aquecimento do ar superficial incitando o fenômeno de ilhas de calor. As modificações no criptoclima modificam os níveis de interação entre os componentes do sistema urbano, pois permite o incremento de um ambiente sinantrópico, que favorece a proliferação de criadouros de mosquitos. A presença do Aedes aegypti, em áreas urbanas, tem causado muitas epidemias de dengue. Esta espécie de culicídeo é considerada o principal vetor urbano desta arbovirose. Pesquisas realizadas apontam que as populações de Aedes aegypti, possuem uma relação com a temperatura da superfície, pois a mesma interfere no seu ciclo de vida. O seu desenvolvimento é limitado pela temperatura, abaixo de 10 o C o mosquito não sobrevive, entre 20 o e 40 o C, as pupas se desenvolvem para o indivíduo adulto e acima de 40 ºC os adultos encontram o limite máximo térmico de sobr...

Journal of Medical Entomology, 1993

The laboratory population dynamics of Chrysomya megacephala (F.) was explored with a mathematical... more The laboratory population dynamics of Chrysomya megacephala (F.) was explored with a mathematical model of density-dependent growth. Fecundity and survival decreased significantly as a function of larval density. Parameters in the exponential regressions fitted to the fecundity and survival data were incorporated into a finite-difference equation that incorporates the delayed effect of larval density on fecundity and survival of adults. The theoretical population model of C. megacephala showed cyclic behavior with a stable limit cycle of two points for adults and immatures.

Departamento de Zoologia, Instituto de Biociencias, UNESP, Campus de Rio Claro - SP, Avenida 24A,... more Departamento de Zoologia, Instituto de Biociencias, UNESP, Campus de Rio Claro - SP, Avenida 24A, 1515, Bela Vista, CEP 13506-900, Rio Claro, SP, Brazil

Moscas-varejeiras utilizam substratos discretos e efemeros para reproducao e para nutricao larval... more Moscas-varejeiras utilizam substratos discretos e efemeros para reproducao e para nutricao larval. Apos a exaustao da comida, as larvas comecam a se dispercar a procura de locais para a pupacao ou de fonte adicional de alimento, processo denominado de dispercao larval pos-alimentar. O tipo de substrato pode afetar esse processo e alguns de seus aspectos foram investigados em Chrysomya albiceps neste trabalho, utilizando uma arena circular coberta com vermiculita, a fim de permitir a dispercao radial larval a partir do centro e comparar com outros estudos com serragem. Para determinar a localizacao de capa pupa, a arena foi dividida em 72 setores iguais. Para cada pupa a distância a partir do centro da arena, o peso e a profundidade de enterramento foram determinados. Testes estatisticos de regressao e correlacao a 95% de confianca e analises direcionais para as variaveis estudadas foram feitos para verificar a relacao entre peso, profundidade e distância de enterramento para pupacao. Diferencas entre sexos quanto as distâncias percorridas, peso e profundidade de enterramento foram feitas com uso do teste de Kruskal-Wallis. Foi verificado que as larvas que mais dispersam sao aquelas com menor peso, o que corrobora os dados obtidos em outros estudos. A maioria das larvas alcancou a distância de enterramento para pupacao entre 5 e 20 cm (21,39 em media). A compreensao do estudo desse processo de dispercao pode ser utilizado na estimativa do intervalo pos-morte ( IPM ) para cadaveres humanos em investigacoes medico-criminais.