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Development and application of a multiplex PCR assay for rapid detection of 4 major bacterial pathogens in ducks.

B. Wei,S. Cha,Min Kang,In‐Jae Park,O. Moon,Choi-Kyu Park,H. Jang

Published 2013 in Poultry Science

ABSTRACT

Infections with Pasteurella multocida, Salmonella enterica, Riemerella anatipestifer, and Escherichia coli result in high morbidity and mortality, which cause significant economic loss in the poultry industry. It can be difficult to distinguish these pathogens based on clinical signs because these pathogens can cause similar clinical signs and coinfections can occur. Thus, rapid and sensitive detection of these 4 major bacterial pathogens are important in ducks. The aim of this study was to develop a multiplex PCR (mPCR) assay for simultaneously detecting and identifying these 4 pathogenic bacteria in a single tube reaction. The target genes used were KMT1 of P. multocida, the invasion protein gene of S. enterica, 16S rDNA of R. anatipestifer, and the alkaline phosphatase gene of E. coli. The detection limit of the assay for all bacterial DNA was 10 pg. The mPCR did not produce any nonspecific amplification products when tested against other related pathogens, including Staphylococcus aureus, Streptococcus pyogenes, Clostridium perfringens, Mycoplasma gallinarum, Mycoplasma synoviae, and Mycoplasma gallisepticum, which can also infect ducks. We applied mPCR to field samples, and the results were the same as the single PCR results. These results suggest that mPCR for the 4 bacteria is a useful and rapid technique to apply to field samples.

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