author(s)
D Choudhury, SC Phukan, S Islam, KH Bulbul, DC Milli, RK Sarmah and A Baruah

abstract
Gastrointestinal nematodes (GINs) particularly Trichostrongylids play a pivotal role in production and productivity of cattle by reducing their milk and milk production due to poor health condition, anorexia, anaemia, diarrhoea etc. Due to variations in the prevalence of GINs from region to region, it becomes important to map out precisely the Trichostrongylid nematodes infections of a particular region i.e. Kamrup metro district of Assam for development of appropriate control measures. Therefore, a total of 510 faecal samples from an organized cattle farm were collected and examined over a period of one year from March 2012 to February 2013 to record the prevalence of different Trichostrongylid GINs. The study revealed 40.78% animals were infected with GINs. The highest prevalence was found to be recorded in the month of July (60.00%) and lowest in March (19.15%). Coproculture showed Trichostrongylus spp. (16.47%) were found to be predominant species, followed by Haemonchus spp. (11.56%) Oesophagostomum spp. (5.69%), Mecistocirrus spp. (4.90%) and Cooperia spp. (2.74%). However 14.71% animals were found to be infected with either two or three genera of Trichostrongylid. The study also revealed the highest prevalence in monsoon season (52.41%) and the lowest in winter season (28.46%).