Twelve Bonsmara tracer calves (aged 6-12 months) were used to monitor helminth infections in the communal farming system of Botshabelo in the Free State. One calve was slaughtered each month from December 1995 to November 1996 and processed for helminth recovery. All the calves harboured worms, but the numbers were always low. The order of prevalence of the major parasites was Trichostrongylus ...

A strain of Trichostrongylus colubriformis from Nottingham Road, in Natal, was found to be solidly resistant to levamisole and morantel at the recommended dose levels. Untreated control sheep in fact harboured fewer worms at slaughter than either of the 2 treated groups. In contrast, the benzimidazoles and ivermectin were more than 99.9% effective against this worm strain. The possible implicat...

the effect of phenylen di-isothiocyanate (jonit) in the mass treatment of various intestinal helminthiases was evaluated among the inhabitants of a village in dezful, southwest iran. stool samples collected and examined from 17 persons showed infection rates of 80% for ancylostoma duodenale, 57.3% for ascaris, 46.7% for trichostronylus spp. and 22.8% for h. nana.seventy- one persons (41 childre...

Background: Trichostrongylus is an intestinal parasite that highly prevalent in humans and livestock worldwide. There limited information about the prevalence epidemiology of species among infected Mazandaran Province, northern Iran. This study aimed to identify spp. small ruminants using morphometric molecular methods. Materials Methods: Small organs sheep goats, slaughtered were examined for ...

the prevalence of various intestinal helminthiases among the inhabitants of 7 villages was compared with that among the nomadic bakhtiari tribe with its migratory habits. stool examination of 736 nomads and 784 persons of the same ethnic group settled in 7 villages showed that, among the settled population, the pre­valence of infection with ascaris, trichostrongylus spp., trichuris trichiura, h...

Intensive use of anthelmintics to control gastrointestinal nematodes selects for anthelmintic resistance, which has become an important issue in many European countries. Presence of nematode strains resistant to benzimidazoles, imidazothiazoles and/or macrocyclic lactones has been repeatedly reported, particularly for the three most important genera, Haemonchus, Teladorsagia and Trichostrongylu...

1. All free-living stages of the nematode parasite of sheep, Trichostrongylus colubriformis Giles, survived exposure to freezing temperatures in contact with water, with the exception of the first-stage juvenile (J1). The third-stage juvenile (J3) was the most resistant stage. The order of relative survival of the different stages was different from that of the lowest F50 (the temperature at wh...