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  • Title: Influence of nonlactating and peripartum bovine mammary secretions on growth of Staphylococcus species.
    Author: Oliver SP, Juneja VK, Harmon RJ.
    Journal: J Dairy Sci; 1990 Apr; 73(4):995-9. PubMed ID: 2345209.
    Abstract:
    Bovine mammary secretions from individual quarters were collected from five cows at 0, 14, and 28 d of involution, at parturition, and 14 d after parturition and used in a microassay to evaluate growth of several Staphylococcus species. All Staphylococcus species evaluated followed similar growth patterns in secretions. Mammary secretions obtained at 14 and 28 d of involution were poor media for growth of Staphylococcus species. Conversely, mammary secretions collected at cessation of milking, parturition, and early lactation supported growth of all species evaluated. Growth of Staphylococcus species in mammary secretions differed slightly among cows but was similar among quarters of a cow. Results suggested that the ability of bovine mammary secretions to support or inhibit growth of Staphylococcus species was related to functional states of the mammary gland.
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