3.2. Laboratory investigation
3.2.1. Human S. aureus isolates
From all of the four samples taken from cases enterotoxigenic
S. aureus of spa-type t127 (clonal complex CC1), displaying phenotypic
fusidic acid (FUS) resistance and harbouring the sea gene together with
further enterotoxin genes (seh, sek, seq) could be isolated. All four
isolates produced enterotoxin A in the culture supernatant (SEA+).
In addition, from one out of three employees of the hotel restaurant
an enterotoxigenic, seb and sep (sea N315) gene positive S. aureus of
spa-type t160 (CC12) was identified. The isolate produced enterotoxin
B in the culture supernatant (SEB+).