Bacterial contaminants in extended boar semen and selection of effective antimicrobials
2010
Kim, H.Y., Animal Disease Diagnostic Center, National Veterinary Research and Quarantine Service, Anyang, Republic of Korea | Byun, J.W., Animal Disease Diagnostic Center, National Veterinary Research and Quarantine Service, Anyang, Republic of Korea | Shin, D.H., Animal Disease Diagnostic Center, National Veterinary Research and Quarantine Service, Anyang, Republic of Korea | Kim, H.S., Animal Disease Diagnostic Center, National Veterinary Research and Quarantine Service, Anyang, Republic of Korea | Yoon, H.C., National Veterinary Research and Quarantine Service, Anyang, Republic of Korea | Park, C.K., Animal Disease Diagnostic Center, National Veterinary Research and Quarantine Service, Anyang, Republic of Korea | Lee, O.S., Animal Disease Diagnostic Center, National Veterinary Research and Quarantine Service, Anyang, Republic of Korea | Jung, B.Y., Animal Disease Diagnostic Center, National Veterinary Research and Quarantine Service, Anyang, Republic of Korea
Bacterial contamination is an unavoidable finding of the semen collection process in boar and can lead in deleterious effects on semen quality and longevity if left uncontrolled. The purpose of this study is to identify the bacteria in extended boar semen and to select the effective antimicrobials to control of the contaminants. Of 116 extended boar semen samples submitted from eight AI centers in Korea, 39 (33.6%) samples were positive for bacterial contamination. Among 39 contaminated semen, most of them (84.6%) were contaminated with one or two bacterial species and there was no significant difference between two age groups (less-than or equal to 24 and greater than 24 month old). Stenotrophomonas maltophilia (n=18) was the most predominant bacterium followed by Elizabethkingia meningoseptica (n=12), phingomonas paucimobilis (n=12), Myroides spp. (n=5), Ochrobactrum anthropi (n=3), and so on. Enrofloxacin (72.9%), florfenicol (72.9%), bacitracin (49.2%) and tylosin (49.2%) showed higher sensitivity compared with penicillin (13.6%) or aminoglycosides (6.8%-18.6%). Brucella spp., Leptospira spp., Mycoplasma hyopneumoniae, Mycoplasma hyorhinis, Mycobacterium tuberculosis complex were not detected in semen by PCR.
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