No new cases were reported after 23 March. By Monday
25 March, only nine students and one kitchen staff
were still off sick, and by Thursday 28 March, symp-toms had resolved in all those affected, and all had
returned back to school or work.
All 19 stool specimens tested positive for C. perfrin-gens. Isolates from 18 of 19 patients were found to
have the enterotoxin gene, and all 18 enterotoxigenic
isolates were undistinguishable by molecular typ-ing (fAFLP CLP.39), which was indicative of a common