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Query is a dynamic tool that allows public health professionals to instantly explore, manipulate and analyze health data using pre-defined reports and variables. Access to Query is limited to authorized public health professionals.

Infectious Diseases (ID) Query


Due to annual system maintenance, data in ID Query will not be refreshed until Thursday, January 24, 2019. The data are current to Monday, December 31, 2018.

ID Query focuses on aggregated infectious disease data extracted from the integrated Public Health Information System (iPHIS). The data are refreshed weekly and includes summarized counts of reportable disease cases from January 1, 2005. No personal health information is included. 



ID Query may contain confidential and sensitive information, and are restricted to public health professionals who take part in public health decision-making and have relevant skills and knowledge to interpret this data.

To gain access, please ensure you meet the criteria above and are registered on our website. Once registered, send an e-mail to using the subject line “Registered User – Request ID Query Access – (Your PHU or organization's name).

If approved, a confirmation will be sent to your account email.

Learn about our data access levels.



Health care-associated infection (HAI) Query


HAI Query focuses on aggregated health care-associated infections extracted from the Hospital Self Reporting Initiative (SRI) database. These reports include data for Clostridium difficile infection (CDI), methicillin-resistant Staphylococcus aureus (MRSA) bacteremias and vancomycin-resistant enterococcus (VRE) bacteremias. The data are refreshed monthly (CDI) or quarterly (MRSA and VRE). No personal health information is included.



All registered PHO website users have access to HAI Query. To gain access, please register on our website.


Factors affecting reportable diseases in Ontario, 1991-2016

Interested in changes to reportable diseases status in Ontario? This report documents major changes to reportable disease status, case definitions, as well as outbreaks and changes to laboratory testing, which impacted reportable disease trends in Ontario from 1991 to 2016.




Page last reviewed:
Page last updated: 2019-01-10 8:30 AM
Uncontrolled print copy. Valid only on day of Print: [date]
Page updated on [date/time] 2019-01-10 8:30 AM
© , Ontario Agency for Health Protection and Promotion