[The occurrence and significance of plasma coagulase negative staphylococci from the genital tract of horses].

This study explored the various plasma-coagulase negative (plc-) staphylococci types present in the genital tracts of mares and stallions, examined the variations in distribution between the two, and investigated the potential correlation between certain plc- staphylococci and infertility in mares. The testing for Fc-fragment binding receptors found no detectable receptors in any of the isolated plc- staphylococcal strains.

Staphylococci Distribution

• The researchers isolated 389 strains of plc- staphylococci from horse genital tracts. These were identified and grouped based on biochemical properties into species including St. sciuri, St. equorum, St. xylosus, St. epidermidis, St. simulans, and many more.
• There were notable variations in the representation of different bacterial species between mares and stallions. St. sciuri and St. Lentus were found to be more prevalent in stallions while St. equorum, St. epidermidis, St. haemolyticus, and others were more common in mares.
• St. simulans was discovered at similar levels in both mares and stallions.

Investigation into Infertility

• The study also looked at associations between the presence of specific staphylococcal species and mare infertility. However, no significant connection was discovered between any specific plc- staphylococci and mares not becoming pregnant following coitus.

Protein A Production Testing

• All 389 plc- staphylococci strains were tested for protein A production, specifically for the production of Fc-fragment binding receptors. This involved a microenzyme-assay using peroxidase-labelled rabbit immunoglobulin G.
• The test results revealed that none of the plc- staphylococcal strains had identifiable cell-bound or extracellular Fc-receptors, suggesting that this bacterial group does not produce Fc-fragment binding receptors.