Study on capability of bacteriophages in dissolving pathogenic Escherichia coli caused respiratory disease in chickens

Abstract

The study was conducted to isolate and evaluate the bacteriophages having capability to dissolve pathogenic Escherichia coli (E. coli) that caused respiratory disease in the Noi chickens raising in An Giang province and Can Tho city. The studied result showed that E. coli presented in all samples (100%) and a total of 18 bacteriophages (25%) were isolated. By PCR technique, three virulent genes, such as: papC, iss and tsh were identified in E. coli with the rate of 30.6%, 31.9%, and 31.9%, respectively. The results of evaluating capability of bacteriophages in dissolving the pathogenic E. coli E.D.BD1 strain in An Giang province and E. coli E.D.CD6 strain in Can Tho city at 24, 48, and 72 hours showed that P.DH.MHH6 and P.D.CD3 bacteriophages presented higher capability in dissolving E.coli than others. P.DH.MHH6 and P.D.CD3 are therefore potential bacteriophages for testing the effective prevention and treatment for the respiratory diseases in chickens caused by E.coli.