Abstract: In this study, we conducted a survey on the prevalence of Campylobacter jejuni of different varieties of poultry in parts of Guangdong province and identified isolates according to the biological characteristics, such as colony and cell morphology, and cultivating characteristics, and multiplex PCR method. The results showed that Campylobacter jejuni infection rates of chickens, ducks and geese in Guangdong region were respectively 7.93%, 2.46% and 4.16%. The result of clicksFpathogenicity test of 10 selected from the isolates showed that the main pathological changes of the avian Campylobacter jejuni diarrhea, blood in the stool, liver white necrosis of the cecum congestion, swelling filled with bubbles and red contents.

Key words: Campylobacter jejuni; identification and isolation; pathogenicity