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Prevalence, biology, pathology, and public health importance of linguatulosis of camel in Iran

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Abstract

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 undercooked liver and visceral organs of camel by humans of this region, the importance of careful inspection at slaughter needs to be emphasized.

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Acknowledgments

The authors would like to thank the authorities of Veterinary School, Shiraz University for their financial support and cooperation. We are also grateful to Mr. L. Shirvani and Mr. G. Yousefi from the Department of Pathobiology, School of Veterinary Medicine, Shiraz University, Shiraz, Iran for their technical assistance.

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  1. Department of Pathobiology, School of Veterinary Medicine, Shiraz University, Shiraz, Iran

    Ahmad Oryan & Monireh Khordadmehr

  2. Department of Clinical Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Iran

    Vahid Reza Ranjbar

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  1. Ahmad Oryan
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Correspondence to Ahmad Oryan.

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Oryan, A., Khordadmehr, M. & Ranjbar, V.R. Prevalence, biology, pathology, and public health importance of linguatulosis of camel in Iran. Trop Anim Health Prod 43, 1225–1231 (2011). https://doi.org/10.1007/s11250-011-9830-4

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