Staphylococcus felis  Staphylococcus felis is a Gram-positive, coagulase-negative member of the bacterial genus "Staphylococcus" consisting of clustered cocci. It demonstrates limited hemolytic activity, but is does show evidence of urease activity and the ability to use sucrose, mannose, and trehalose. "S. felis" has been isolated from and is associated with skin infections in cats.