PMID: 9652383Jul 4, 1998Paper

Hypobiosis of Haemonchus contortus in natural infections of sheep and goats in a semi-arid area of Kenya

Veterinary Parasitology
P M GatongiM E Scott

Abstract

A total of 42 lambs, 42 kids, 21 ewes and 21 does were necropsied during an investigation of the epidemiology of Haemonchus contortus infection of sheep (Red Maasai) and goats (Small East African Goat) in a semi-arid area of Kenya. Availability and establishment of the infective stages were monitored by the necropsy of 21 tracer lambs and 21 tracer kids. Prevalence of H. contortus was over 90% in both sheep and goats and this species contributed to about 80% of the total worm burden. Only about 10% of the hypobiotic larvae were recovered from the mucosal digest whereas about 90% were recovered from the abomasal contents and washings, thereby suggesting that hypobiotic larvae may be loosely attached to the abomasal mucosa from which they may be dislodged during the processing of the abomasa for examination. Throughout the study, both adult worms and hypobiotic larvae were found in proportions that varied with seasons. Statistically, a higher proportion of hypobiotic larvae was found during the dry months than during the wet months, an indication that hypobiosis was an important feature in the survival of H. contortus during the dry months. Negligible worm burdens were acquired by the tracers during the short rains, suggesting th...Continue Reading

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Citations

Jun 24, 1998·Veterinary Parasitology·R M WaruiruJ W Ngotho
Aug 28, 2014·International Journal for Parasitology. Parasites and Wildlife·Erin E GorsichAnna E Jolles
Sep 10, 2016·Parasite : Journal De La Société Française De Parasitologie·Salah MeradiBourhane Bentounsi
Oct 21, 2016·International Journal for Parasitology. Parasites and Wildlife·Marta Kołodziej-SobocińskaRafał Kowalczyk
Nov 1, 2001·Psychological Science in the Public Interest : a Journal of the American Psychological Society·K RaynerM S Seidenberg
Jul 21, 2005·New Zealand Veterinary Journal·H J Pharo

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