High Rates of Staphylococcus aureus USA400 Infection, Northern Canada - Volume 17, Number 4—April 2011 - Emerging Infectious Diseases journal - CDC

Surveillance of Staphylococcus aureus infections in 3 northern remote communities of Saskatchewan was undertaken. Rates of methicillin-resistant infections were extremely high (146-482/10,000 population), and most (98.2%) were caused by USA400 strains. Although USA400 prevalence has diminished in the United States, this strain is continuing to predominate throughout many northern communities in Canada.