Encapsulated, coagulase-negative strain of Staphylococcus simulans.

An encapsulated strain of Staphylococcus simulans (strain 76) isolated from a clinical case of bovine mastitis was demonstrated by the India ink technique, using both a light microscope and an electron microscope. The strain failed to kill mice after intraperitoneal inoculation but resisted ingestion by peritoneal phagocytic cells. The behavior of the strain helps to delineate the antiphagocytic role of the capsule.