All of the following are TRUE statements about staphylococci, EXCEPT:
Impetigo pyoderma, a disease characterized by blister-like multifocal pustules on the face and hands in children and adults, can be caused by Staphylococcus aureus and/or beta hemolytic Streptococcus pyogenes, not only by S. aureus. All of the other statements are true. Also Know: Staphylococci form clusters and are catalase-positive. In staphylococcal TSS, the pyrogenic exotoxin TSST-1 is produced during the course of a staphylococcal infection with systemic disease as a result of absorption of toxin from the local site. TSS may be the result of in vivo production of any of the Staph SAgs, with TSST-1 simply the most common offender. Ref :Ray C.G., Ryan K.J. (2010). Chapter 24. Staphylococci. In C.G. Ray, K.J. Ryan (Eds), Sherris Medical Microbiology, 5e.