Study of Virulence Genes, Antibiotic and β-Lactamase Profiles of Proteus mirabilis Isolated from Livestock and Livestock ProductsSurya Teja Naidu,Bhavana Bodempudi,Bindu Kiranmayi Chinnam,Subhashini Nelapati,Srinivasa Rao Tummati,Nagaveni Cherukuri,Venkata Chaitanya Pedada.
Proteus mirabilis is an emerging foodborne pathogen and has been associated with food poisoning outbreaks, urinary tract infections and may cause serious diseases. The present study was undertaken to characterize P. mirabilis species of animal origin based on cultural isolation, PCR confirmation, virulence profiles, antibiogram and production of β-lactamases. Among the 183 samples (135 foods of animal origin and 48 chicken cloacal swabs), 61 (33.33%) isolates were found to be P. mirabilis by species-specific PCR. All the P. mirabilis isolates carried different combinations of putative virulence genes. β-lactamase genes were detected in a total of 37 isolates out of 61(60.65%) with blaTEM being the predominant gene detected (89.18%) followed by blaOXA (10.81%), blaSHV (5.40%) and DHA (2.70%). The findings of this study revealed that there may be a danger of transmission of drug resistant P. mirabilis to consumers through consumption of improperly cooked meat which can lead to treatment failure.
Key words: P. mirabilis, PCR, Virulotyping, MAR index, β-Lactamases, ESBLs, AmpC β-lactamases.