The Pathogen Diagnosis and Drug Sensitivity Test of Swollen Eye Chicken from Qingyuan City

Different clinical symptoms of swollen eye and runny nose were shown on three groups of chicken in Qingyuan district,Guangdong Province and ideal clinical treatment result had not achieved.In order to detect the pathogen of these three groups of chickens,bacterial isolation and culture,gram staining and wright stain were performed on nasal fluids taken from them as well as biochemical and slide agglutination tests on relevant isolated bacterial strains.The results showed that the bacteria were gram negative and blue for wright stain,showed the shape of bacilli or cocci under oil immersion objective,bipole stained,could strongly agglutinate with Haemophilus paragallinarum(HPG) serotype A serum but not with serotype B or C serum.Consequenty,the pathogen of this swollen eye chicken was identified as HPG serotype A.Drug sensitivity test was carried out simultaneously on this pathogen and showed that HPG serotype A was super hypersensitive to ceftiofur,florfenicol and penicillin.