Outbreak Updates

Outbreak Information

Trillium Health Partners (THP) places the safety of patients, people, and the community first. Our Infection Prevention and Control (IPaC) Team monitors new infectious diseases and takes proactive steps to manage outbreaks in the hospital, working to prevent the spread of infections.

What is an Outbreak?

An outbreak happens when there is suspected spread of an infection or specific organism amongst patients or staff within a specific area of the hospital over a certain time period. The Ministry of Health sets the rules for defining outbreaks.

What Happens When an Outbreak is Declared?

When the IPaC team declares an outbreak, extra steps are taken to prevent the spread in order to protect patients, staff, and the community. These may include:

  • Placing patients on isolation when needed
  • Ensuring the availability and use of the proper protective equipment (PPE)
  • Screening and testing patients and staff as needed
  • Closing affected units to new admissions and transfers
  • Tracking potential exposures
  • Enhancing cleaning and disinfection
  • Enhancing hand hygiene and safety audit
  • Limiting visitors in the affected area

Total Outbreaks

Dec 23, 2025 - Three (3) patients on GB Mental Health Unit at Mississauga Hospital have tested positive for Influenza A. These cases are suspected to have been hospital acquired and meets threshold for outbreak declaration.

Current Outbreak Numbers
As of Dec 24, 2025 5:00 p.m.

Confirmed patients in this unit: 3
Confirmed positive staff in this unit: 0

Dec 18, 2025 - Two (2) patients on Orthopedic IP Unit at Queensway Health Centre have tested positive for Influenza A . These cases are suspected to have been hospital acquired and meets threshold for outbreak declaration.

Current Outbreak Numbers
As of Dec 24, 2025 5:00 p.m.

Confirmed positive patients in this unit: 2
Confirmed positive staff in this unit: 0

Dec 16, 2025 5C Rehabilitation Unit - This outbreak is no longer active.

Dec 21, 2025 4C Medicine Unit - This outbreak is no longer active.

Dec 21, 2025 4D Medicine Unit - This outbreak is no longer active.

Dec 22, 2025 4B Medicine Unit - This outbreak is no longer active.

Dec 24, 2025 3C-1 Geriatric Seniors Unit - This outbreak is no longer active.