[Virulence factors of coagulase-negative Staphylococcus of human and bovine origin].
Virulence factors such as hydrophobicity of cell surface, capsule formation and slime production were investigated in 393 CNS strains, 190 isolated from bovine mastitis and 203 from human infections; in addition a selected number of CNS species were experimentally infused into the teat cistern of lactating rabbits for pathogenicity tests. Most human (95%) and bovine (82.6%) strains showed cell hydrophobicity properties, however only 11.3% and 7.9% were capsulated strains, respectively. Slime production was detected in 10.5% of bovine strains but only in 0.9% of human strains. Using the lactating rabbit model it was shown that S. chromogenes, S. epidermidis, S. saprophyticus and S. haemolyticus were the most pathogenic species.
Saa
E
E
Instituto de Microbiología, Universidad Austral de Chile, Valdivia.
Kruze
J
J
D000818:Animals; D016667:Bacterial Capsules / Q000032:analysis; D001940:Breast / Q000382:microbiology / Q000473:pathology; D002417:Cattle / Q000382:microbiology*; D003030:Coagulase; D005260:Female; D006801:Humans; D008070:Lipopolysaccharides / Q000378:metabolism; D008413:Mastitis / Q000382:microbiology / Q000473:pathology; D008414:Mastitis, Bovine / Q000382:microbiology*; D011135:Polysaccharides, Bacterial / Q000378:metabolism; D011817:Rabbits; D013045:Species Specificity; D013203:Staphylococcal Infections / Q000382:microbiology* / Q000662:veterinary; D013210:Staphylococcus / Q000145:classification / Q000201:enzymology / Q000302:isolation & purification / Q000472:pathogenicity*; D013499:Surface Properties
D003030:Coagulase; D008070:Lipopolysaccharides; D011135:Polysaccharides, Bacterial