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Indian Journal of Comparative Microbiology, Immunology and Infectious Diseases
Year : 2009, Volume : 30, Issue : 2
First page : ( 105) Last page : ( 112)
Print ISSN : 0970-9320. Online ISSN : 0974-0147.

Occurrence of multiple drug resistant (MDR) aerobic bacteria in vaginal swabs of mares and their association with infertility

Singh B.R.*Principal Scientist (Veterinary Microbiology)

National Research Centre on Equines, Hissar, Haryana, India-125 001.

* ICAR Research Complex for NEH Region Nagaland Centre, Jharnapani-191 106; e.mail - brs1762@yahoo.co.in, brs1762@ gmail.com.


Only few attempts have been made to understand reproductive tract (RT) flora of infertile mares. This study was conducted to reveal diversity in aerobic bacteria and their antimicrobial drug resistance of breeding mares. Vaginal swabs of 54 infertile and 12 healthy mares were cultured for aerobic bacteria. Pseudomonas aeruginosa, Aeromonas hydrophila, Edwardsiella tarda, Enterobacter agglomerans, Streptococcus zooepidemicus and majority (18/19) of Enterococcus cecorum were isolated from infertile mares only, while Klebsiella pneumoniae, Escherichia coli, Proteus mirabilis, P. vulgaris, Enterococcus faecium, E. faecalis, Enterobacter aerogenes and Streptococcus vestibularis and S. mitis were isolated both from infertile and fertile mares. Multiple drug resistance (MDR) was present in bacterial isolates irrespective of reproductive status of mares. All streptococcal isolates were resistant to ⩾ 12 antimicrobials. Enterococci and E. coli isolates from infertile mares were significantly more resistant to imipenem and â-lactam antibiotics, respectively. The isolation rate of Proteus spp. and Enterococcus spp. was significantly (χ2, 0.05) higher in mares with history of antimicrobial therapy. The study revealed substantial change in aerobic bacteria of RT of infertile mares, change favoured potential pathogens with MDR and antimicrobial therapy modulated to some extent RT microflora.


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