Summer mastitis experimentally induced by Hydrotaea irritans exposed to bacteria

J. Chirico, P. Jonsson, S. Kjellberg, G. Thomas

    Research output: Contribution to journalArticleAcademicpeer-review

    23 Citations (Scopus)

    Abstract

    Summer mastitis is an acute suppurative bacterial infection of the udder in heifers and dry cows. To ascertain the possible role of flies in the transmission of the disease, experimental exposures of recipient heifers to Hydrotaea irritans previously exposed to bacteria were carried out. Flies were allowed to feed on secretions from clinical cases of summer mastitis. The pathogens present were the bacteria Staphylococcus aureus, Streptococcus dysgalactiae, Actinomyces pyogenes, Stuart-Schwan cocci, Peptococcus indolicus, Fusobacterium necrophorum and Bacterioides species. The teats of eight heifers were exposed to flies with verified pathogen content. Two teats of each animal were deliberately damaged before fly exposure. One teat was cut, another pricked with insect needles to mimic insect bites. Two of the heifers developed summer mastiris in the quarters where teats had been cut. The bacterial species isolated from these quarters corresponded to those that had previously been fed to the flies. For the first time, it is now demonstrated that H. irritans is capable of transmitting summer mastitis pathogens and so causing summer mastitis in recipient heifers. Lesions on the teat orifice may be a predisposing factor in the development of the disease.
    Original languageEnglish
    Pages (from-to)187-192
    JournalMedical and Veterinary Entomology
    Volume11
    Issue number2
    DOIs
    Publication statusPublished - 1997

    Fingerprint

    Hydrotaea irritans
    Mastitis
    teats
    Diptera
    mastitis
    heifers
    Bacteria
    bacterium
    summer
    bacteria
    pathogen
    pathogens
    Peptostreptococcus indolicus
    Peptococcus
    Fusobacterium necrophorum
    insect
    Insect Bites and Stings
    Streptococcus dysgalactiae
    Arcanobacterium pyogenes
    Actinomyces

    Cite this

    Chirico, J. ; Jonsson, P. ; Kjellberg, S. ; Thomas, G. / Summer mastitis experimentally induced by Hydrotaea irritans exposed to bacteria. In: Medical and Veterinary Entomology. 1997 ; Vol. 11, No. 2. pp. 187-192.
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    abstract = "Summer mastitis is an acute suppurative bacterial infection of the udder in heifers and dry cows. To ascertain the possible role of flies in the transmission of the disease, experimental exposures of recipient heifers to Hydrotaea irritans previously exposed to bacteria were carried out. Flies were allowed to feed on secretions from clinical cases of summer mastitis. The pathogens present were the bacteria Staphylococcus aureus, Streptococcus dysgalactiae, Actinomyces pyogenes, Stuart-Schwan cocci, Peptococcus indolicus, Fusobacterium necrophorum and Bacterioides species. The teats of eight heifers were exposed to flies with verified pathogen content. Two teats of each animal were deliberately damaged before fly exposure. One teat was cut, another pricked with insect needles to mimic insect bites. Two of the heifers developed summer mastiris in the quarters where teats had been cut. The bacterial species isolated from these quarters corresponded to those that had previously been fed to the flies. For the first time, it is now demonstrated that H. irritans is capable of transmitting summer mastitis pathogens and so causing summer mastitis in recipient heifers. Lesions on the teat orifice may be a predisposing factor in the development of the disease.",
    author = "J. Chirico and P. Jonsson and S. Kjellberg and G. Thomas",
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    Summer mastitis experimentally induced by Hydrotaea irritans exposed to bacteria. / Chirico, J.; Jonsson, P.; Kjellberg, S.; Thomas, G.

    In: Medical and Veterinary Entomology, Vol. 11, No. 2, 1997, p. 187-192.

    Research output: Contribution to journalArticleAcademicpeer-review

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