@article{MAKHILLJAVA200873446,
    title = {Coagulase Negative <I>Staphylococci</I> and <I>Staphylococcus aureus</I>, the Main Organisms Causing Pre and Post Calving Heifer Mastitis in a Holstein Dairy Farm},
    journal = {Journal of Animal and Veterinary Advances},
    volume = {7},
    number = {3},
    pages = {299-302},
    year = {2008},
    issn = {1680-5593},
    doi = {javaa.2008.299.302},
    url = {https://makhillpublications.co/view-article.php?issn=1680-5593&doi=javaa.2008.299.302},
    author = {A. H. Fallah Rad},
    keywords = {Heifer mastitis,CNS,Staph. aureus,SCC,TBC},
    abstract = {The main microbial causes of IMI in heifers in a dairy farm with long history of high incidence of mastitis were studied in 53 pregnant heifers. Mammary secretions (52 samples) and milk (53 samples) were taken on day 5±5 before and day 10±5 after calving, respectively. Each sterile composite sample from 4 quarters was obtained, refrigerated and transported into the lab for culture and SCC. Results showed that in the pre calving samples, the most frequent bacteria found were: <I>CNS</I>, <I>Staph. aureus, E.coli, Strep. dysgalactia </I>and<I> Strep. uberis</I> at the rate of 71, 68, 57, 35 and 32% of the samples, respectively. In post calving samples, prevalence of <I>CNS, Staph. aureus, E.coli, Strep. dysgalactia</I>, <I>agalactia, bovis </I>and<I> uberis</I> was 69, 47, 18, 37, 24 and 5%, respectively. <I>Streptococci</I> were found in all the pre and/or post parturition samples. Yeasts were isolated from 7.7% of the pre and 9.43% of the post calving samples. The most prevalent CNS was <I>Staph. chromogenes</I> which was found in 20% of the pre and 28% of the post parturition samples. SCC in all the samples were higher than the local standards (2×10<SUP>5</SUP>), showing high contamination of the mammary glands with environmental and/or contagious microorganisms.}
    }