For 2010 there were 1,577 new active and re-treatment TB cases reported to the CTBRS, with a corresponding incidence rate of 4.6 per 100,000 population. This represents an unprecedented national low since collection of TB data began in Canada in 1924. However, reported TB incidence rates varied by jurisdiction, and in particular there was a disproportionately high number of cases reported in Nunavut. As a result of an ongoing outbreak in Nunavut, the territory reported 101 active TB cases for 2010, almost twice the number as reported in 2009, resulting in a reported incidence rate of 304.0 per 100,000 population.
From the preliminary reports, all provinces and territories reported at least one case of active TB disease in 2010. Newfoundland and Labrador reported a drop in the number of reported cases from 22 in 2009 to 8 in 2010. For the remaining provinces and territories with the exception of Nunavut, the number of reported cases in 2010 was stable relative to the number of cases reported in 2009.
Individuals between the ages of 25 and 34 years made up the largest number of reported cases in 2010, accounting for 18% of the total. However, the corresponding reported incidence rate of 6.0 per 100,000 population for this age group was surpassed by the rate of 9.6 per 100,000 reported for those greater than 74 years of age.
Across the provinces and territories, patterns generally follow the national trend with most cases reported among individuals between 25 and 44 years of age. However, there were a couple of deviations from this trend. Almost 50% of the cases reported in 2010 from Saskatchewan were among individuals between 0 and 24 years of age, whereas this age group comprised only 18% of overall cases across Canada. In British Columbia, 21% of reported cases were 75 years of age and older, whereas this proportion was only 14% for all cases reported in Canada.
In 2010, 66% of all reported TB cases were among foreign-born individuals, 21% among Canadian-born Aboriginal people and 12% of cases were among Canadian-born non-Aboriginal people. In Alberta, British Columbia, Ontario and Quebec, the majority of cases were reported among foreign-born individuals. In Manitoba, Saskatchewan and the North (which includes Northwest Territories, Nunavut and Yukon), the majority of cases were among Canadian-born Aboriginal peoples. In the Atlantic provinces, the small number of reported cases were mostly distributed between foreign-born and Canadian-born non-Aboriginal peoples; Newfoundland and Labrador, however did report cases among Aboriginal peoples.
For 2010, pulmonary TB continued to be the main disease site, representing 64% of all reported cases. In all provinces and territories the majority of cases were diagnosed with pulmonary disease. In Saskatchewan and the Northwest Territories, a greater proportion of cases were diagnosed with primary disease compared to other jurisdictions.
Finally, there were a total of 64 cases of primary TB reported in 2010; 67% of these were among Canadian-born Aboriginal peoples. Of the 197 peripheral lymph node TB cases, 89% were diagnosed in foreign-born individuals.
To obtain a copy of the report, send your request to:
Centre for Communicable Diseases and Infection Control
Public Health Agency of Canada
Room 1341, 100 Eglantine Driveway, Health Canada Building
A.L. 0601A, Tunney's Pasture
Ottawa, ON K1A 0K9