[Coagulase-negative staphylococci isolated from the milk of cows with subclinical mastitis].
Studied were a total of 450 strains of coagulase-negative staphylococci, 60.2 per cent of which were sensitive to novobiocin, and 37.1 per cent were producing delta toxin, 35.2 per cent were yielding lysosime, and 27.8 per cent - fibrinolysin. As compared to staphylococci isolated from normal cows they showed higher protease, DN-ase, and lecitinase activity. A scheme is suggested for the differentiation of the coagulase-negative mastitis staphylococci, of primary importance being the evaluation of their virulence to chick embryos or cell cultures.
D000818:Animals; D002417:Cattle; D002478:Cells, Cultured; D002642:Chick Embryo; D003030:Coagulase / Q000378:metabolism*; D005260:Female; D008414:Mastitis, Bovine / Q000382:microbiology*; D051379:Mice; D008892:Milk / Q000166:cytology / Q000382:microbiology*; D013210:Staphylococcus / Q000201:enzymology* / Q000302:isolation & purification* / Q000472:pathogenicity; D014774:Virulence
D003030:Coagulase
Prouchvaniia vŭrkhu koagulazonegativni stafilokoki, izolirani ot mliako na kravi sus subklinichen mastiti.