title: Collagen binding, elastase production, and slime production associated with coagulase-negative staphylococci isolated from bovine intramammary infections.
abstract: Collagen binding, elastase production, slime production, and associated somatic cell counts were determined with 160 strains of coagulase-negative staphylococci isolated from bovine intramammary infections. Mean binding values for type I and II collagen with Staphylococcus epidermidis, S. chromogenes, and S. hyicus strains were 5.8, 6.6, and 7.4 and 4.3, 4.2, and 4.9%, respectively. Eleven of 28 (39.3%) S. epidermidis, 1 of 38 (2.6%) S. chromogenes, and 1 of 94 (1.1%) S. hyicus strains were elastase positive. Slime production was noted with 12 (42.9%) S. epidermidis, 1 (2.6%) S. chromogenes, and 11 (11.7%) S. hyicus strains. No differences in somatic cell counts were observed with type I or type II collagen binding, elastase production, or slime production with S. epidermidis or S. chromogenes. However, somatic cell counts associated with S. hyicus strains with collagen type I binding affinities of greater than 5 and type II binding affinities of greater than 3 were 320.7 x 10(3) compared with 163.9 x 10(3) for strains with lower binding affinities.
authors.affiliation: Mastitis Research Laboratory, Louisiana State University Agricultural Center, Homer 71040.
authors.forename: J L
authors.initials: JL
authors.lastname: Watts
authors.forename: A S
authors.initials: AS
authors.lastname: Naidu
authors.forename: T
authors.initials: T
authors.lastname: Wadström
mesh_terms: D000818:Animals; D002417:Cattle; D002452:Cell Count / Q000662:veterinary; D003094:Collagen / Q000378:metabolism*; D005260:Female; D008414:Mastitis, Bovine / Q000382:microbiology*; D010196:Pancreatic Elastase / Q000096:biosynthesis*; D013203:Staphylococcal Infections / Q000382:microbiology*; D013210:Staphylococcus / Q000201:enzymology / Q000378:metabolism* / Q000472:pathogenicity; D013212:Staphylococcus epidermidis / Q000201:enzymology / Q000378:metabolism / Q000472:pathogenicity; D014774:Virulence
chemical_list: D003094:Collagen; D010196:Pancreatic Elastase