“…IVOC specimens were incubated with either one of the patient‐derived staphylococci, or with one of RN6390, a reference wildtype exotoxin‐ but nonenterotoxin‐producing S. aureus (Agr+ Sar+, producing α, β, and δ hemolysins, lipase, protein A, fibronectin‐binding protein),29 RN6911, a nonexotoxin‐producing Agr‐deficient mutant of RN6390,29 or one of two clinically derived strains (courtesy of Dr. Nigel Curtis), an SEB enterotoxin‐producing strain or Staph B, a nonenterotoxin‐producing EDIN‐B exotoxin producing strain 30. In addition to negative controls (no bacteria), an enteropathogenic E. coli (EPEC), E2348/69,28 was used as a positive control.…”