, community-acquired S. argenteus infection in northeast Thailand since 2006/07, when 4% of isolates from 246 unselected patients presenting to Sunpasitthiprasong Hospital (one of the study hospitals) with invasive putative S. aureus disease were actually S. argenteus [6]. The basis for this is unclear, although we note that S. argenteus sepsis occurred more often in men and may be associated with occupation or differential exposure for other reasons.