Afzal, M

A Study Of Intestinal Nematodes With Taxonomy Of The Species Of Genus Trichostrongylus In Sheep In District Bahawalpur - 1992

Study of intestinal nernatodes with taxonomy of the species of genus Trichostmngyjs in sheep in district Bahawalpur was conducted. For this purpose two hundred guts of' sheep were collected from Bahawalpur Abattoir aid adjacent areas of' Cholistan. The study was conducted from January, 1992 to April, 1 992. The parasites were recovered by sedimentation and Sieving method performed at Divisional Diagnostic Laboratory l3ahawalpur. Parasites were identified directly under microscope by preparing lwrmancllt mounts in the Parasitology Section, College of Veterinary Sciences, Lahore. The overall incidences of gastro- intestinal nematodes was 63% in sheep.
The species of nematodes observed during the study were:

Oesophagostomum venulosum 62%
Oesophagostomum clumbianum 52%
Trichuris ovis 38.5%
Trichuris globulosa 24%
Nematodirus spathiger : 25%
Haemonochus contortus: 14%
Trichostrongylus colubriformis: 24%
Trichostrongylus axei: 13.5%

Monthwise prevalence of nematodes infection was also carried out and it was observed that the highest infection rate was 84% during the months of April and 68% during the month of March. In February the infection was 56%. The lowest incidence was recorded as 44% during the month of January. The taxonomy of the species of genus lrichostrongyjis was studied. Trichostrongylus colubriformis and Trichostrongylus axei
Species were identified.

Department of Parasitology


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