Naturally acquired bovine besnoitiosis: Differential distribution of parasites in the skin of chronically infected cattle

Veterinary Parasitology
Gereon ScharesN S Gollnick

Abstract

Bovine besnoitiosis is caused by Besnoitia besnoiti, an apicomplexan parasite closely related to Toxoplasma gondii and Neospora caninum. In the acute stage of besnoitiosis, cattle suffer from pyrexia, swollen lymph nodes, anorexia and subcutaneous edema. In the chronic stage, tissue cysts are formed in a variety of tissues including the skin. Knowledge about the distribution of tissue cysts of different parts of the skin of infected animals is scarce. Four chronically infected cattle were euthanized and skin samples were taken from a total of 77 standardized cutaneous locations per animal. Portions of the dermis were taken, from which DNA was extracted and examined by real-time PCR. Cycle of transition (Ct) values reflecting the amount of parasite DNA in the samples were determined. For statistical analysis, samples were attributed to 11 larger skin regions ('OuterHindlegDistal', 'Rump, ForelegMiddle', 'NoseFrontEars', 'CheekEye', 'SideLowerPart', 'ForelegDistal', 'SideUpperPart', 'LegsInner', 'VentralHeadNeck', 'DorsalNeckWithersBackTail'). While all samples revealed a positive result in three female cattle, only 63.6% (49/77) of the samples of a bull showed positive results. For statistical analysis, a Ct value of 45 was assu...Continue Reading

References

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Citations

Apr 29, 2016·The Veterinary Record·E G RyanT de Waal
Jan 19, 2018·Transboundary and Emerging Diseases·N S GollnickM C Langenmayer
Dec 31, 2019·Veterinary Parasitology·Carlos Diezma-DíazGema Álvarez-García
Oct 24, 2020·Parasites & Vectors·Christelle GrisezPhilippe Jacquiet

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