To study the prevalence of infections with Campylobacter spp in Haryana, India, a stool sample was collected using a rectal swab from 30 buffaloes, 62 cattle, 95 pigs and 94 children and was bacteriologically cultured. The subjects were either apparently healthy or had diarrhoea. The organisms were isolated in a medium containing reducing agents and antibiotics, and culture plates were incubated in a candle jar at 42 degrees C. 63% of all thermophilic Campylobacter were cultured from rectal swabs taken from young livestock and children with diarrhoea. Of 32 isolates fully identified, 23 were C. jejuni, 8 were C. coli and 1 was C. laridis. The C. jejuni isolates belonged to the Lior's biotype II.