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J Clin Microbiol. 1987 November; 25(11): 2037-2039

Synergistic hemolysis associated with coagulase-negative staphylococci isolated from bovine mammary glands.

Mastitis Research Laboratory, Louisiana State University Agricultural Center, Homer 71040.

ABSTRACT

A total of 353 coagulase-negative staphylococcus (CNS) isolates from infected bovine mammary glands were tested for cytolysin production by using the synergistic hemolysin assay (SHA). Overall, 34.6% of CNS isolates were SHA positive. Human-associated, coagulase-negative staphylococcal species contained the greatest number of SHA-positive strains. Milk leukocyte levels expressed as somatic cell counts (SCC) were elevated with SHA-positive Staphylococcus epidermidis, Staphylococcus hominis, and Staphylococcus warneri strains. Elevated SCC levels were associated with strains of Staphylococcus hyicus and Staphylococcus chromogenes. However, no difference in SCC levels was observed between SHA-positive and SHA-negative strains. Results indicated that the SHA was a sensitive test for the detection of cytolysin-producing CNS.

This article has been cited by other articles:

• Zhang, S., Maddox, C. W. (2000). Cytotoxic Activity of Coagulase-Negative Staphylococci in Bovine Mastitis. Infect. Immun. 68: 1102-1108 [Abstract] [Full Text]