Result of isolating Riemerella anatipestifer bacteria from duck specimens with symptoms of septicemia disease

Abstract

In this study, Riemerella anatipestifer (RA) bacteria was isolated and identified from the specimens of 408 ducks at different ages with symptoms of septicemia disease. The studied results showed that the percentage of ducks suffering with septicemia disease caused by RA was 35.04%, on average.
The infection rate of ducks with RA bacteria decreased gradually by age, in which, the ducks under 8 weeks presented the highest positive rate (47.37%.) with RA bacteria. The result of analyzing sequence of the 16S rRNA gene revealed that, all of the isolated RA bacteria strains belonged to Riemerella anatipestifer species