Ottawa Public Health Respiratory and Enteric Surveillance Report January 5, 2018 (Week 1)

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1 Ottawa Public Health Respiratory and Enteric Surveillance Report January 5, 2018 (Week 1) This report summarizes information on influenza in the community and acute care in Ottawa and the rest of the province. It also includes information about respiratory and enteric in institutions such as long term care, retirement homes and acute care. Table 1: Respiratory Highlights** Data Source Lab-confirmed cases (Ottawa residents only) Percent positivity for specimens submitted for testing for influenza Long-term care, Retirement Home, and Hospital Outbreaks Ottawa emergency room visit trends for respiratory illness (ACES) OPH Influenza activity level reported to Public Health Ontario (week 52) Ontario Respiratory Pathogen Bulletin (week 52) Activity Level Compared To Previous Week Higher than last week. Higher than last week. Similar to last week. Lower than last week. Similar to last week. Higher than last week. Details There have been 129 cases of influenza reported to Ottawa Public Health since September 1, Of these, 82 (63.6%) were influenza A. Seven influenza A cases have been subtyped are H3. The median age of cases is 71 years of age. The percent positivity of all respiratory samples tested for influenza at EORLA and PHOL is 16% There are 2 new respiratory reported this week. There have been 8 influenza and 19 noninfluenza respiratory reported since September 1, There are 10 ongoing respiratory. The numbers of visits due to respiratory illness in Ottawa emergency rooms is lower in comparison to last week. Localized activity Since September 1, 2017, 1247 laboratory-confirmed influenza cases have been reported. Among these cases, 70% (873/1247) were influenza A. Of the reported influenza A cases with subtype information available 90.2% (239/265) were H3N2. Coronavirus (10.1%) is the most common circulating respiratory virus in Ontario. Information is shared from the Public Health Ontario website.

2 Table 2: Enteric Highlights** Data Source Activity Level Details Long-term care, Retirement Home, and Hospital Enteric Outbreaks Similar to last week. Three new were reported this week. Fifteen enteric have been reported this season. There are 12 ongoing enteric. ** Data are as of 12 pm, January 5, Lab-confirmed cases Table 3: Summary of lab-confirmed cases of influenza, Ottawa, Age (years) Season to date Proportion of total labconfirmed cases (%) Incidence (per 100,000) Less than % to % to % to % % 50.7 Total influenza cases Data source: iphis, MOHLTC, extracted by Ottawa Public Health on January 5, 2018

3 Figure 1: Number of reported laboratory-confirmed influenza cases by episode week and age group, Ottawa residents, September 1, 2017 (week 35) to January 5, 2018 (week 1) and historical trends Data source: iphis, MOHLTC, extracted by Ottawa Public Health on January 5, Percent Positivity for Influenza Figure 2: % positivity in Ottawa (EORLA Virology Lab and Ontario Public Health lab), as of week 52

4 3. Respiratory Institutional Outbreaks Figure 3: Respiratory Outbreaks, LTC, Acute Care, And Retirement Homes, Current Season ( ), Ottawa and three-year mean Data source: iphis, MOHLTC, extracted by Ottawa Public Health on January 5, Syndromic Surveillance This information is obtained from Acute Care Enhanced Surveillance (ACES), based at KFL&A Public Health, which monitors the reason for visits to emergency rooms in Ottawa. An influenza-like illness or ILI is a possible diagnosis of influenza based on a set of common symptoms: fever, chills, body aches, coughing, shortness of breath or gastrointestinal complaints for those under 5. These counts do not represent diagnosed cases of influenza because cases may have symptoms due to other conditions. Detailed ILI reports (English only) are available from KFL&A. Because syndrome visits are coded from presenting complaints, ILI syndrome visit counts are not specific to ILI and may be due to other causes. This means the ILI syndrome counts will be higher than the number of visits that are genuinely due to ILI.

5 Figure 4: Ottawa emergency department respiratory visits with 7 day moving average and two standard deviations 5. Enteric Outbreaks Figure 5: Enteric Outbreaks, LTC, Acute Care, And Retirement Homes, Current Season ( ), Ottawa and three-year mean Data source: iphis, MOHLTC, extracted by Ottawa Public Health on January 5, 2018

6 Data tables Table for Figure 1: Number of reported laboratory-confirmed influenza cases by episode week and age group Week <5 years 5-19 years years >65 years

7 Week <5 years 5-19 years years >65 years

8 Table for Figure 2: % positivity in Ottawa (EORLA Virology Lab and Ontario Public Health lab) Week Total number of tests Influenza A % positivity Influenza B % positivity Total Influenza % positivity

9 Week Total number of tests Influenza A % positivity Influenza B % positivity Total Influenza % positivity Table for Figure 3: Respiratory Outbreaks, LTC, Acute Care, And Retirement Homes, Current Season ( ), Ottawa and three-year mean Week Non-influenza Influenza A Influenza B 3 year mean

10 Week Non-influenza Influenza A Influenza B 3 year mean

11 Week Non-influenza Influenza A Influenza B 3 year mean Table for Figure 5: Enteric Outbreaks, LTC, Acute Care, And Retirement Homes, Current Season ( ), Ottawa and three-year mean Week Norovirus C. difficile infections All other enteric 3 year mean

12 Week Norovirus C. difficile infections All other enteric 3 year mean

13 Week Norovirus C. difficile infections All other enteric 3 year mean