On the helminth parasites of buffalo-calves with special reference to Toxocara vitulorum

Selim, M.K.

Assiut Veterinary Medical Journal 7((Suppl 1)): 43-48


ISSN/ISBN: 1012-5973
Accession: 000942055

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Among 1005 buffalo calves of varying ages examined, 74.4% of 40-day-old calves slaughtered at Cairo abattoir, Egypt, were infected with Toxocara vitulorum. The worm burden ranged from 70 to > 500 (mean 219) worms/animal and they were concentrated mostly in the 2nd, 3rd and 4th m of small intestine. Examination of a further 4329 buffaloes of a variety of ages (from < 2 months to > 6 years) showed there was a tendency for the rate of infection with T. vitulorum to decrease with an increase in age. 2 buffalo cows were experimentally infected with 3 doses of 100 embryonated eggs of T. vitulorum one, 2 and 3 months after being served, and their calves were subsequently examined. Eggs were detected in the faeces of the male calf 17 days after birth (patent period 75 days) and of the female calf 28 days after birth (patent period 88 days). Maximum egg counts were recorded on days 50 and 58, respectively, of the patent period. Both calves showed unthriftiness, rought coats, stunted growth and alternation between constipation and diarrhoea. None of 29 buffaloes aged 6 to 54 months inoculated with 500 000 embryonated eggs of T. vitulorum. was successfully infected. Mice, however, were successfully infected, larvae being detected in the caecum 2.5 h after infection and recovered from the mesenteric system and liver after 3.5 h. Larvae were also detected in the kidneys, spleen, brain and genital organs.