Methicillin Resistant Staphylococcus aureus

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Methicillin Resistant Staphylococcus aureus

• and
• Socioeconomic Status

Kim Simmonds, Douglas C Dover Michael
Sanderson Alberta Health Wellness June 4, 2008
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Outline

• Background
• Objective
• Methods
• Results
• Implications Conclusions

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Background

• CMRSA 7 10 are of concern in Alberta
• Outbreak in 2004-05 resulted in the awareness of
  CA-MRSA
• SES is frequently determined at aggregate level
  not at the individual level
• Albertans currently pay health care premiums

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Objective

• To describe the relationship between
• socio-economic status and Community Acquired
  MRSA cases in Alberta.

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Methods

• Cases
• All new infections, among Alberta residents
  less than 65 years, identified from laboratory
  surveillance, as CMRSA 7 or CMRSA 10.
• Between January 1, 2006-December 31, 2007

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Methods-Subsidy levels
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CMRSA 7 Rates by SES
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Results CMRSA 7

• The infection rate has increased for First
  Nations over time across most age groups
• The infection rate has not increased for other
  SES groups.
• First Nations are over represented with a
  relative risk of 14.8 (95 CI 13.7-16.1) in 2007
  compared to those receiving no subsidy

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CMRSA 10 Rates by SES
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(No Transcript)
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Results CMRSA 10

• The infection rate has increased for all subsidy
  groups, with the age and gender distribution
  remaining the same.
• First Nations and those on social assistance
  remain over represented
• RR for First Nation 5.5 (95 CI 5.1-5.9)
• RR for Social Assistance 6.4 (95 CI5.8-7.0)
• compared to those with no subsidy

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Strengths/ Limitations

• Limitations
• Omission of those gt65 years of age
• Only two years of complete data
• Strengths
• Individual based SES measure
• Population based surveillance

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Conclusions

• CMRSA 7 and CMRSA 10 have different epidemiology
• CMRSA 7 has increased among First Nations
• CMRSA 10 has increased for all SES groups
• Surveillance is important to determine changes in
  the epidemiology of CA-MRSA
• Focus efforts on these groups

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Thank you

• Further Information
• Kimberley Simmonds,
• Infectious Disease Surveillance Team Lead,
• Alberta Health Wellness
• 780-415-2803
• Kimberley.simmonds_at_gov.ab.ca