“…tested with Microscreen@ Campylobacter latex test (Mercia Diagnostics, Guildford) according to the manufacturer's instructions. A single, representative, presumptive campylobacter-positive colony from each sample, was subcultured from the filtration plate and further characterized by the following biochemical tests : growth in air, oxidase, catalase (Skirrow and Benjamin 1980), nitrate reduction (Cook 1950), H,S production (Roop et al 1984a), susceptibility to nalidixic acid and cephalothin (Skirrow and Benjamin 1980), hydrolysis of hippurate (Harvey 1980) and indoxyl acetate (Mills and Gherna 1987), growth at various temperatures and in the presence of 1% glycine (Lander and Gill 1985), and finally by DNA-DNA hybridization.…”