Characteristics and Antimicrobial Susceptibilities of Pasteurella (Moraxella) anatipestifer Isolated from Ducks in Thailand

Abstract

Twenty isolates of Pasteurella (Moraxella) anatipestifer from twenty outbreaks of infectious serositis in ducks during October 1988 to July 1989 were examined on their biochemical, physiological characteristics, enzymatic reactions and antimicrobial susceptibilities. Eighteen isolates out of 20 isolates were glucose and maltose positive, 3 isolates were fructose positive and one of each was mannose, arabinose, trehalose and sorbitol positive from biochemical tests. Physiological characteristics of all isolates were gelatinase positive and urease negative, while 2/20, 3/20, 5/20 and 6/20 were positive to indole test, Camp test, milk proteolysis and coagulated serum proteolysis, respectively. All isolates were highly susceptible to cephalexin, cephaloridine, erythromycin, oleandomycin, tetracycline and dimethylchlorotetracycline. From APIZYM reactions, seven enzymes (phosphatase alkaline, esterase (C4), esterase lipase (C8), leucine arylamidase, valine arylamidase, phosphatase acid and phosphoamidase) were detected from all isolates.