MHLU - Health Status Resource

Other Communicable Diseases and Outbreak Investigations

Other Communicable Diseases and Outbreak Investigations

Key Findings: 
  • In 2009 and 2010, there were seven confirmed Clostridium difficile infection (CDI) outbreaks reported in public hospitals in Middlesex-London, and 83 outbreak associated CDI cases (data not shown).
  • Females represented 59.0% of CDI cases reported for Middlesex-London in 2009 and 2010, and one-third of cases were 80 years of age or over (36.1%) (data not shown).
  • Between 2000 and 2010, an average of 16 invasive Group A Streptococcus (iGAS) infections were reported in Middlesex-London per year (Fig. 8.41), the majority of whom were 60 years of age and over (37.4%) (data not shown).
  • Over the 11-year time period of interest, the incidence of iGAS infections was similar in both Middlesex-London and Ontario as whole (Fig. 8.42).
  • Between 2000 and 2010, an average of eight active tuberculosis (TB) infections per year were reported and followed up in Middlesex-London (Fig. 8.43).
  • Between 2005 and 2010, the incidence rate of active TB infections reported for Middlesex-London was significantly lower than the rate for the province as a whole (Fig. 8.44).
  • In the 11-year time period between 2000 and 2010, there were two Creutzfeldt-Jakob disease (CJD), eight legionella, and four Q fever infections reported in Middlesex-London (data not shown).
  • On average, 142 confirmed and 21 potential outbreaks were investigated per year in Middlesex-London between 2005 and 2011 (data not shown).
  • Between 2005 and 2011, an average of 74 enteric and 64 respiratory outbreaks were investigated and confirmed annually in Middlesex-London (Fig. 8.45).
  • In the 5-year period between 2007 and 2011, the majority of confirmed enteric outbreaks investigated in Middlesex-London were in child care centres (42.6%); two-thirds of confirmed respiratory outbreaks were in long-term care homes (LTCHs) (67.3%) (Fig. 8.46).
  • Between 2007 and 2011, norovirus (50.8%) was the most commonly identified pathogen among confirmed outbreak investigations in Middlesex-London where an enteric pathogen was isolated; rhinovirus (29.2%) and influenza A (27.2%) were most common among confirmed outbreaks where a respiratory pathogen was identified (Fig. 8.46).
How this Indicator was Calculated: 
Ontario Public Health Standard: 

Population Health Assessment and Surveillance Protocol - Section 1, Subsections a-i, b-iii

Infectious Diseases Prevention and Control Standard - Requirement #3

Tuberculosis Prevention and Control Standard - Requirement #2