Gastrointestinal nematode larvae in the grazing land of cattle in Guwahati, Assam -

摘要

Aim: To know the prevalence of gastrointestinal nematode larvae (L ₃ ) in the grazing land of cattle in Guwahati, Kamrup district, Assam. Materials and Methods: Pastures were collected and examined for the presence of nematode larvae (L ₃ ) from six localities of Guwahati at monthly interval from August 2012 to July 2013. The counted larvae were then expressed as per kg dry matter of herbage (L ₃ /kg DM). Results: Examination of pastures revealed presence of nematode larvae (L ₃ ) in pastures throughout the year which varied from 4.5 L ₃ /kg DM in January to a maximum of 106.33 L ₃ /kg DM in August. The L ₃ of Haemonchus contortus , Trichostrongylus spp., Oesophagostomum spp., Cooperia spp., and Mecistocirrus spp. were recovered from pastures. The average pasture larval burden (PLB) was 34.75?3.48 L ₃ /kg DM. Season-wise PLB revealed the presence of 23.89?3.01, 67.54?5.41, 26.67?1.92, and 7.28?0.89 L ₃ /kg DM during pre-monsoon, monsoon, post-monsoon, and winter seasons, respectively. Monsoon season has significant (p 3 ) in the pastures of Guwahati, Assam throughout the year, statistically significant during monsoon season.