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An inhibitor typing scheme for Streptococcus uberis.

J R Tagg, L G Vugler

    The Journal of Dairy Research
    |August 1, 1986
    PubMed
    Summary
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    A new typing scheme effectively differentiates Streptococcus uberis strains based on bacteriocin-like inhibitory substances. This method aids in understanding the epidemiology of Streptococcus uberis mastitis in dairy cattle.

    Area of Science:

    • Microbiology
    • Veterinary Science
    • Epidemiology

    Background:

    • Streptococcus uberis is a significant pathogen causing mastitis in dairy cattle.
    • Accurate typing methods are crucial for epidemiological investigations of mastitis outbreaks.

    Purpose of the Study:

    • To develop and evaluate a novel typing scheme for Streptococcus uberis strains.
    • To assess the potential of this scheme in aiding the epidemiological study of Streptococcus uberis mastitis.

    Main Methods:

    • A typing scheme was employed to test 15 Streptococcus uberis strains.
    • Strains were characterized by their production (P-type) and sensitivity (S-type) to bacteriocin-like inhibitory substances.
    • Reproducibility of P-type and S-type designations was confirmed.

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    Main Results:

    • Twelve of the 15 strains were identified as inhibitor producers, with nine distinct P-types detected.
    • All strains were typable for inhibitor sensitivity, revealing ten different S-types.
    • Combining P-typing and S-typing generated highly discriminatory inhibitor 'fingerprints' for each strain.

    Conclusions:

    • The developed typing scheme demonstrates high discriminatory power for Streptococcus uberis isolates.
    • This method shows significant potential for epidemiological investigations of Streptococcus uberis mastitis in dairy cattle.