Exoprotein and slime production by coagulase-negative staphylococci isolated from goats' milk

Veterinary Microbiology
N Bedidi-MadaniY Richard

Abstract

Milk from mastitis-free goats from French herds was examined for the presence of coagulase-negative staphylococci (CNS), and 165 positive isolates were evaluated for their capacity to produce exoproteins. Most isolates were identified as Staphylococcus caprae (N = 91) or S. xylosus (N = 36), but members of at least nine other species were present. Overall, some 57% of isolates produced toxins with phenotypic properties of alpha-hemolysin, and 75% produced toxins resembling S. aureus beta and/or delta-hemolysins. Thermostable desoxyribonuclease (TNAse) was secreted by 29% of isolates and thermolabile DNAse by 66%. Slime was produced by 42% of our cultures and, although none of them showed activity to insoluble elastase, over 70% lysed the soluble substrate. No clinical consequences were observed to correlate with exoprotein production, which proved to be inconstant within individual CNS species.

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Citations

Jun 20, 2012·Polish Journal of Veterinary Sciences·M Bochniarz, W Wawron
Sep 22, 2015·Toxins·Luiza PinheiroMaria de Lourdes Ribeiro de Souza da Cunha
Sep 14, 2015·Journal of Dairy Science·Maged El-AshkerHelmut Hotzel
Aug 8, 2006·The Journal of Veterinary Medical Science·Yumiko KomineKen-ichi Komine

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