Studies on abomasal nematodes of sheep in relation to temperate climatic factors

Tariq KA Lateef M      

Abstract

An epidemiological study with an objective to assess the seasonal dynamics and over winter survival of abomasal nematodes of sheep in a temperate climate of Kashmir valley, India was carried out in naturally infected sheep over a period of two years. Faecal examination [prevalence (%age) and faecal egg counts (epg), larval differentiation] and necropsy of the study animals were the methods employed. Haemonchus contortus and Teladorsagia (Ostertagia) circumcincta were most prevalent followed by Trichostrongylus sp. however; the prevalence differed (non-significant) in the two years. Summer showed significantly higher prevalence of all the three parasites as compared to other seasons. The observations revealed arrested development (hypobiosis) within the host body during winter (P = 0.008), which was confirmed through the recovery of L4 and adult nematodes from host abomasums in winter. The present study indicates the seasonality and arrested development of abomasal nematodes in the sheep in the temperate climatic conditions and validates their strategic overwinter survival and resumption of development on the onset of suitable environmental conditions in spring.


MS Received Date:   2017-09-27  MS Accepted Date:  2017-11-08  MS Published Date:  2017-11-09
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Tariq KA, Lateef M. "Studies on abomasal nematodes of sheep in relation to temperate climatic factors" Journal of Zoology Studies 4.5 (2017): 1-5.
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Tariq, KA., Lateef, M. (2017). Studies on abomasal nematodes of sheep in relation to temperate climatic factors. Journal of Zoology Studies, 4(5), 1-5.
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Tariq KA, Lateef M. Studies on abomasal nematodes of sheep in relation to temperate climatic factors. Journal of Zoology Studies. 2017; 4(5): 1-5.
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