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PHO Rounds: Epidemiology: Evaluation of a Risk-Based Screening Tool for Tuberculosis Contacts – Does It Work?
Thursday, March 24, 2016 12:00 pm to 01:00 pm
Venue: 480 University Ave, Suite 300 Toronto, ON M5G 1V2 Boardroom 345
Infectious Diseases
City: Toronto
Type: PHO Rounds: Epidemiology
Format: In Person; Webinar

Note: This is an open invitation, and may be forwarded to interested parties.

In 2007, Toronto Public Health (TPH) developed a Contact Screening Parameters Tool (CSPT) to provide a more systematic, risk-based approach for prioritizing contact follow-up for pulmonary tuberculosis (TB) cases.  The CSPT was based on an analysis of case and contact outcomes in Toronto as well as exposure-time parameters drawn from the literature, and benchmarking with North American TB programs. Cases are classified as low, medium or high risk based on the case's acid-fast bacilli (AFB) smear results, chest x-ray findings, and symptoms. The screening guidelines incorporate the circumstances of exposure (e.g. setting and time spent together while infectious) and susceptibility of contacts. 

We conducted an evaluation to assess the effectiveness and operational use of the CSPT in an applied public health setting, and to determine whether the source case infectivity rating and individual tool parameters successfully predicted the likelihood of transmission.  This project was partly funded by a grant from Public Health Ontario. 

DISCLAIMER: The opinions expressed by speakers and moderators do not necessarily reflect the official policies or views of Public Health Ontario, nor does the mention of trade names, commercial practices, or organizations imply endorsement by Public Health Ontario. 

Presenter: Teresa Leung

Teresa Leung is an epidemiologist with Toronto Public Health supporting the Tuberculosis Prevention and Control Program.  She is a former field epidemiologist who was placed with Vancouver Coastal Health Authority.  Teresa has also worked with the Public Health Agency of Canada across several program areas, including immunization and respiratory infections, enteric outbreak management, and emergency preparedness and response. 

Public Health Ontario Rounds are approved for continuing medical education from the Royal College of Physicians and Surgeons.
PHO Rounds are also approved by Council of Professional Experience for professional development hours (PDHs) for members of the Canadian Institute of Public Health Inspectors (CIPHI).
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Public Health Ontario is committed to complying with the Accessibility for Ontarians with Disabilities Act (AODA).
If you require accommodations to participate in this event, please contact 647-260-7100 or

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