MEDLINE Journals

    Possible labile inhibition of the growth of Streptococcus uberis in milk from cows free from mastitis.

    Authors
    Kliem KE, Hillerton JE 
    Institution

    Institute for Animal Health, Newbury, Berkshire, RG20 7NN, UK. kirsty.kliem@bbsrc.ac.uk

    Source
    J Dairy Res 2002 Aug; 69(3) :375-82.
    Abstract

    Milk from dairy cows never known to have had an intramammary infection with Streptococcus uberis can inhibit growth of Str. uberis for up to 7 h. This inhibition is abolished if milk is heated to 80 degrees C. Inhibition appears not to be related to immune defences as it occurs in skimmed milk (cell free), is unrelated to the concentration of immunoglobulin and survives heating to 56 degrees C. The effect is partly overcome by addition of selected amino acids and vitamins. It is suggested that the inhibition is caused by a restriction in the supply of essential nutrients part of which may require the conversion of plasminogen to plasmin.

    Mesh
    Animals
    Antibodies, Bacterial
    Cattle
    Enzyme-Linked Immunosorbent Assay
    Female
    Fibrinolysin
    Immunoglobulin G
    Kinetics
    Lactoperoxidase
    Mastitis, Bovine
    Milk
    Plasminogen
    Streptococcus
    Language

    eng

    Pub Type(s)
    Journal Article Research Support, Non-U.S. Gov't
    PubMed ID

    12369408

    Content Manager
    Related Content

    		Further studies on the efficacy of a live vaccine against mastitis caused by Streptococcus uberis.

    		Decreased growth of Streptococcus uberis in milk from mammary glands of cows challenged with the same mastitis pathogen.

    		Immune modification of the pathogenesis of Streptococcus uberis mastitis in the dairy cow.

    		Dynamics of leukocytes and cytokines during experimentally induced Streptococcus uberis mastitis.

    		Bactericidal activity of macrophages against Streptococcus uberis is different in mammary gland secretions of lactating and drying off cows.

    		MtuA, a lipoprotein receptor antigen from Streptococcus uberis, is responsible for acquisition of manganese during growth in milk and is essential for infection of the lactating bovine mammary gland.

    		Isolation and characterization of a mutant strain of Streptococcus uberis, which fails to utilize a plasmin derived beta-casein peptide for the acquisition of methionine.

    		Short communication: growth characteristics of Streptococcus uberis in UHT-treated milk.