biofilm formation, hemolysin production and antimicrobial susceptibilities of streptococcus agalactiae isolated from the mastitis milk of dairy cows in shahrekord district, iran
نویسندگان
چکیده
streptococcus agalactiae is a major contagious pathogen causing bovine sub-clinical mastitis. the present investigation was carried out to determine some phenotypic characteristics of the s. agalactiae strains isolated from bovine mastitis cases in dairy cows of shahrekord in the west-center of iran. one hundred eighty california mastitis test (cmt) positive milk samples were bacteriologically studied. a total of 31 (17.2%) s. agalactiae isolated. twenty eight (90.3%) of the isolates were biofilm producers. this finding may indicate the high potential of pathogenicity in isolated strains. sixteen (51.6%) isolates were α hemolysin producers. only 19.3%, 22.5% and 29.0% of the isolates were sensitive to streptomycin, flumequine and kanamycin, respectively. none of these three agents is recommended for treatment of mastitis cases.
منابع مشابه
Biofilm formation, hemolysin production and antimicrobial susceptibilities of Streptococcus agalactiae isolated from the mastitis milk of dairy cows in Shahrekord district, Iran
Streptococcus agalactiae is a major contagious pathogen causing bovine sub-clinical mastitis. The present investigation was carried out to determine some phenotypic characteristics of the S. agalactiae strains isolated from bovine mastitis cases in dairy cows of Shahrekord in the west-center of Iran. One hundred eighty California mastitis test (CMT) positive milk samples were ...
متن کاملBiofilm formation, hemolysin production and antimicrobial susceptibilities of Streptococcus agalactiae isolated from the mastitis milk of dairy cows in Shahrekord district, Iran
Streptococcus agalactiae is a major contagious pathogen causing bovine sub-clinical mastitis. The present investigation was carried out to determine some phenotypic characteristics of the S. agalactiae strains isolated from bovine mastitis cases in dairy cows of Shahrekord in the west-center of Iran. One hundred eighty California mastitis test (CMT) positive milk samples were bacteriologically ...
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Characteristics of staphylococci isolated from clinical and subclinical mastitis cows in Shahrekord, Iran
Staphylococci isolated from 98 mastitic cow’s milk samples were analyzed for the production of alpha,beta and delta-hemolysin on sheep, bovine and horse red blood cells and in vitro susceptibility to several antimicrobial agents. Out of a total of 18 isolated strains, 100% demonstrated hemolytic activity either alone or in combined forms. Among 8 isolates of S. aureus 3 isolates produced α/β an...
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The objective of this study was to evaluate the effectiveness of different antibiotics against mastitis causing microorganisms during first phase of lactation in herd of 320 Holstein cows in east of Slovakia. Milk samples from quarters were cultured and identified bacteria were subjected to antimicrobial susceptibility test by disc diffusion method to a large number of antibiotics. The results ...
متن کاملIdentification of Streptococcus canis isolated from milk of dairy cows with subclinical mastitis.
Streptococcus canis was isolated from 31 milk samples from 11 cows in a dairy herd (with 49 lactating cows) affected by subclinical mastitis in north Rhine-Westphalia, Germany. Thirty-one isolates from the infected udder quarters were further characterized for their phenotypic and molecular properties. Most isolates (83.9%) produced alpha-galactosidase, and all were negative for beta-d-glucuron...
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عنوان ژورنال:
veterinary research forumناشر: faculty of veterinary medicine, urmia university
ISSN 2008-8140
دوره 4
شماره 4 2013
کلمات کلیدی
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