The prevalence of Linguatula serrata nymphs in mesenteric and mediastinal lymph nodes in one-humped camels (Camelus dromedarius) slaughtered in Rafsanjan slaughterhouse, Iran (original) (raw)
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Veterinary research forum : an international quarterly journal, 2012
Linguatula serrata, well known as tongue worm; is an aberrant cosmopolitan parasite, which inhabits the canine respiratory system (final host). The discharged eggs infect many plant feeder animals including human causing visceral and nasopharyngeal linguatulosis which is known as "Marrara syndrome". In current study, the prevalence of infection with L. serrata nymphs in mesenteric lymph nodes (MLNs) of slaughtered camels was investigated in Isfahan Province, Iran. The MLNs of 232 slaughtered camels, including 115 females and 117 males, were examined for L. serrata nymphs. Camels were categorized into four age groups, namely under six months, six months to two years, two to four years and greater than four years. Also, the morphometrics of the nymphs were measured using the classic parasitology methods. Results showed that 21.12% of examined camels were infected with L. serrata. Age and sex had no significant effect on the prevalence of this parasite in camels. The size of ...
Research in Veterinary Science, 2008
The prevalence of Linguatula serrata nymphs in livers and mesenteric lymph nodes (MLNs) of 400 camels of different sex and age groups was investigated. The lymph nodes and livers were examined macroscopically. A digestion method was also applied for investigation of liver samples. The MLNs in 84 camels out of 400 (21.0%) and the livers of 18 camels out of 400 (4.5%) were infected by L. serrata nymphs. The infection rate increased with age (p < 0.01). No significant difference was observed between the prevalence in males and females (p > 0.1). It is concluded that consumption of raw or under-cooked camel liver may result in nasopharyngeal linguatulosis in humans.
Prevalence, biology, pathology, and public health importance of linguatulosis of camel in Iran
Tropical Animal Health and Production, 2011
Linguatula serrata is a cosmopolitan zoonotic parasite with its adult form occurring in the nasal and respiratory passages of canids as the definitive hosts, while its immature stages localize in the mesenteric lymph nodes, liver, spleen, lungs, and, rarely, in other organs, such as the ocular region of herbivorous intermediate hosts. Humans can behave as both intermediate and final host and are infected by visceral and nasopharyngeal linguatulosis. Consumption of infected, improperly cooked viscera of the intermediate hosts, including sheep, goats, cattle, camels, or other herbivores containing the larval stages of this parasite is a potential source of infection of human beings with the nasopharyngeal form of linguatulosis. However, nasopharyngeal secretions or feces of carnivores containing eggs of Linguatula are the main sources for infecting human beings with the visceral form of this infection. In the present study, the prevalence of infection by nymphs of L. serrata in 101 camels in Yazd Province, central Iran, was estimated based on histopathological studies of samples from two, apparently enlarged, mesenteric lymph nodes (MLN), together with one sample from a whitish pinpoint spot on the liver and spleen of each animal. Thirteen camels (12.9%) were infected with the nymphal stage of L. serrata. Age and sex did not play a significant role in the prevalence of this parasitic infection. The number of parasites in each MLN ranged from one to six larvae. In view of the consumption of raw or under-cooked liver and visceral organs of camel by humans of this region, the importance of careful inspection at slaughter needs to be emphasized.
Prevalence of Linguatula serrata Infection in Animals from the Cairo Abattoir
The Journal of Parasitology, 1976
Background: Linguatulosis is a rare zoonotic parasitic infection, in which human plays the role of both definitive and intermediate host and can be occasionally infected. This study determines the status of infection in livestock and its potential risk to men in the northwestern province of Azarbaijan-e-Sharghi, Iran. Methods: In a cross-sectional study from June 2007 to June 2008, 800 slaughtered animals including 400 cattle and 400 buffaloes from Tabriz abattoir in Azarbaijan-e-Sharghi Province were randomly selected and examined for L. serrata nymphs. After primary macroscopical inspection, all liver and lung samples were cut to small pieces, treated with a tissue digestion method and checked macroscopically and microscopically for free or encapsulated nymphs. Results: Out of 800 animals, 3 (0.38%) were found to be infected with L. serrata nymphs and the prevalence of infection in cattle and buffaloes was determined to be 0.25% and 0.5%, respectively. Conclusion: Linguatula infection occurs as an endemic zoonosis in the study area and has an active transmission life cycle.
International Journal of Advanced Research in Biological Sciences, 2017
Linguatula serrata is an arthropod of the class pentastomida, found worldwide. It has a zoonotic importance to humans either by ingestion of nymphs (nasopharyngeal linguatulosis) or by ingestion of eggs (visceral linguatulosis). This study aimed to record the prevalence rate of this zoonotic parasite in camels and goats as well as experimental infestation of dogs to collect and identify the adults male and female as well as eggs. Four hundred slaughtered camels and goats (200 Goats, 200 Camels) were inspected from Cairo abattoir, of different sex and age at the period of January to December 2015. One hundred donkeys were also inspected on postmortem examination for infestation with L. serrata nymphs from slaughterhouse at Giza zoo, Egypt. Fecal samples, nasal swab were collected from 150 stray dogs for coprological detection of natural infestation with adult L. serrata with negative results. The total prevalence rate of infestation in herbivorous animals was 22.8% with L. serrata ny...
Bulgarian Journal of Veterinary Medicine
Linguatulosis is one of the important zoonotic diseases that cause public health problems worldwide. This study was carried out from March 2014 to February 2015 to estimate the prevalence of nymphal stages of Linguatula serrata in ruminants of different sex and age slaughtered at the Kermanshah municipal abattoir, in western Iran. For this purpose, the mesenteric lymph nodes (MLNs) were examined grossly and three MLNs for each animal were collected for parasitological and pathological studies. Of the total of 456 sheep (252 ♂ and 204 ♀), 390 goats (215 ♂ and 175 ♀) and 412 cattle (255 ♂ and 157 ♀), 90 (19.7%), 98 (25.1%) and 53 (12.8%) were infected with nymph stages of L. serrata, respectively. A significant difference in the prevalence of linguatulosis was observed among studied animals (P<0.05) and the highest and lowest prevalence were detected in goats and cattle, respectively. Prevalence of L. serrata nymphs in males and females was not significantly different (P>0.05). The prevalence increased with age (P<0.05). Grossly, the infected MLNs were enlarged, and their cross-sectional areas were coarse, firm, granulated, oedematous, and red in colour. Necrosis, oedema, haemorrhages, depletion of the lymphocytes and granulomatous reactions which are characterised by infiltration of mononuclear inflammatory cell around the parasite were the main histopathological lesions. These results indicated the high prevalence of L. serrata infection in livestock animals in Kermanshah. Furthermore, this study provides a preliminary baseline data for the future monitoring of this potentially important parasitic disease. The potential importance of these findings to human health is discussed.
Prevalence of Linguatula serrata in lymph nodes of small ruminants: case from Iran
Comparative Clinical Pathology, 2013
Linguatulosis is a zoonotic parasitic disease caused by Endoparasite that belongs to the arthropod class. This study surveys the status of infection in North of Iran and its potential risks for humans. In a crosssectional study during June 2010 to June 2011 on slaughtered livestock in Amol slaughterhouse including 107 goats, 100 sheep and 100 cattle from northern provinces were selected randomly and their mesenteric lymph nodes macroscopically and microscopically examined for Linguatula serrate nymph. Totally 110 animals out of 307 were infected with Linguatula serrate nymph and prevalence of rate in goat, sheep and cattle were 19(19%), 17(17%) and 74 (69.15%), respectively. Linguatulosis is an endemic infection in the most of Iran provinces and it has an active transmission. Therefore, more studies and attention of authorities are required regarding its prevention and control.
Prevalence of Linguatula serrata Nymph in Goat in Tabriz, North-West of Iran
Abstract Linguatula serrata is one of well-known members of Pentastomida which infects both humans and animals. The aim of this study was to evaluate the prevalence of L. serrata in mesenteric lymph nodes, livers and lungs of goats slaughtered in Tabriz area, Iran. Mesenteric lymph nodes (MLNs), livers and lungs of 280 goats slaughtered in Tabriz, North-west of Iran were investigated for nymphs of L. serrata from September 2009 to September 2010. The organs were examined macroscopically and then a tissue digestion method was also done for investigation of liver and lung of the goats that were infected MLN. The liver and lung samples were mostly taken from the condemned and rejected part of organs. The infection rate of L. serrata nymphs in MLNs, livers and lungs was 27.1 %, 2.8 % and 2.8 % respectively. The number of isolated nymph in infected lymph nodes varied from 1 to 22 with a mean of 7. Only one nymph was isolated from each infected livers and lungs. The infection rate increas...