Staphylococcus aureus has developed many mechanisms to escape from human immune responses. To resist phagocytic clearance, S. aureus expresses a polysaccharide capsule, which effectively masks the bacterial surface and surface-associated proteins, such as opsonins, from recognition by phagocytic cells.

Is Staphylococcus aureus capsule positive or negative?

aureus was first described in 1931 by Gilbert (38). However, since capsule detection methods were crude (India ink negative staining, colony morphology on agar plates and in serum-soft agar, and lack of cell-associated clumping factor), very few strains of S. aureus were recognized as capsule positive.

Does Staphylococcus aureus have endospores?

S. aureus is nonmotile, non-spore forming, catalase and coagulase positive.