Establishment of camel isolates of Haemonchus longistipes and Trichostrongylus colubriformis in goats.
Two main nematode parasites, Haemonchus longistipes and Trichostrongylus colubriformis, have been reported to cause morbidity and mortality in camels. Although goats are usually reared with camels in the combined animal husbandry system prevailing in Northern India, these parasites have not been reported in goats. Therefore, it was planned to conduct an experimental cross-transmission study of H. longistipes and T. colubriformis isolated from camels and transferred to young goats. Twelve healthy kids (5-6 months) were divided into three groups of four each. Groups I and II were infected orally with third stage infective larvae of H. longistipes and T. colubriformis cultured in the laboratory from faecal isolates from camels, at the rate of 50,000 and 100,000 larvae, respectively; group III comprised uninfected healthy controls. Daily clinical and faecal examinations were made. Body weights and blood haematological indices were measured at weekly intervals. The infection became established in both infected groups, and the animals started passing ova 17 days postinfection. Egg counts varied from 275.00 +/- 248.74 to 6150 +/- 2830.63 eggs g-1. Animals were killed 28 days postinfection. On postmortem examination mature as well as immature worms were recovered from the abomasum and intestine with typical postmortem changes seen in both the groups. Clinical manifestations were weakness and loss of body weight but no diarrhoea. There was a marked fall in haemoglobin and packed cell volume, indicating anaemia in both infected groups.
Singh
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Department of Veterinary Parasitology, College of Veterinary Sciences, Haryana Agricultural University, Hisar, India.
Kumar
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Yadav
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D000018:Abomasum / Q000469:parasitology; D000818:Animals; D002162:Camelus / Q000469:parasitology*; D004195:Disease Models, Animal; D005243:Feces / Q000469:parasitology; D015511:Goat Diseases / Q000209:etiology*; D006041:Goats; D006188:Haemonchiasis / Q000209:etiology / Q000662:veterinary*; D007411:Intestinal Diseases, Parasitic / Q000209:etiology / Q000662:veterinary*; D007421:Intestine, Small / Q000469:parasitology; D010270:Parasite Egg Count / Q000662:veterinary; D011897:Random Allocation; D014253:Trichostrongylosis / Q000209:etiology / Q000662:veterinary*