Methicillin-resistant Staphylococcus aureus in Canada: a historical perspective and lessons learned

Area of Science:

• Infectious Diseases
• Microbiology
• Public Health

Background:

• Methicillin-resistant Staphylococcus aureus (MRSA) emerged in Canada in 1964, with early reports of community isolates in the 1970s.
• Nosocomial MRSA outbreaks became common by 1978, escalating into endemic institutional prevalence by the 1990s.

Observation:

• Both hospital-acquired and community-acquired MRSA strains have caused significant medical issues in Canada over the past decade.
• A recent epidemic of Canadian community-acquired MRSA-10 has heightened public health concerns.

Findings:

• Canadian MRSA surveillance systems are maturing, with a typing system for epidemic clones now available.
• The financial burden of MRSA surveillance, treatment, and control is substantial, correlating with rising isolation rates.

Implications:

• While surveillance is key for MRSA management, greater attention must be paid to MRSA reservoirs.
• Public health initiatives for MRSA control require broad dissemination in both healthcare settings and community/home environments.