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OJVRTM

Online Journal of Veterinary Research©

 Volume 11 (3): 14-23, 2007

Bacterial study of clinical postpartum endometritis in Holstein dairy cows

 

Yavari M1, Haghkhah M2, Ahmadi MR1

 

Department of Clinical Sciences1 and Pathobiology2 School of Veterinary Medicine, Shiraz University, Iran

ABSTRACT

 

Yavari M, Haghkhah M, Ahmadi MR Bacterial study of clinical postpartum endometritis in Holstein dairy cows, Online J Vet Res, 11 (3): 14-23, 2007 Endometritis is inflammation of the endometrial lining of the uterus and is associated with delayed uterine involution and poor reproductive performance. The aim of this study was to present the results of bacteriological culture from uterine swabs of dairy cows affected with postpartum endometritis and to evaluate the antimicrobial susceptibility of the isolated bacteria. In total, eighty nine Holstein cows affected with postpartum endometritis were selected and sampled between 21-35 day postpartum. Swabs (n=89) were collected from the uterine lumen of dairy cattle. Bacteria were identified following aerobic and anaerobic culture and the disk diffusion method was used to determine susceptibility of the major pathogenic isolated bacteria. The results revealed that the most common isolates from cases of endometritis in study cows were Arcanobacterium pyogenes, E. coli, and non-differentiated streptococci, staphylococci and bacilli. The antimicrobial susceptibility tests showed that E. coli were sensitive to enrofloxacin and ceftiofur, but resistant to tetracycline and oxytetracycline. For A. pyogenes, 72, 66, 72 and 72 percent of isolates were resistant to oxytetracycline, tetracycline, enrofloxacin and ceftiofur respectively. All isolates showed resistance to penicillin. In conclusion, oxytetracycline which is the most traditional antimicrobial therapy for postpartum endometritis in cows appears not to be efficient. There is widespread resistance to enrofloxacin and third generation cephalosporins too. Therefore, dairy farms need to evaluate alternatives to treating and preventing post-partum endometritis including non antibiotic options.

 

Keywords: Endometritis; Bacteria; Antimicrobial susceptibility; Uterus; Dairy cow

 

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