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Volume 17, Number 3—March 2011
Research

Active Tuberculosis among Homeless Persons, Toronto, Ontario, Canada, 1998–2007

Kamran KhanComments to Author , Elizabeth Rea, Cameron McDermaid, Rebecca Stuart, Catharine Chambers, Jun Wang, Angie Chan, Michael Gardam, Frances B. Jamieson, Jae Yang, and Stephen W. Hwang
Author affiliations: Author affiliations: St. Michael’s Hospital, Toronto, Ontario, Canada (K. Khan, C. Chambers, J. Wang, A. Chan, J. Yang, S.W. Hwang); University of Toronto, Toronto (K. Khan, E. Rea, M. Gardam, F. Jamieson, S.W. Hwang); Toronto Public Health, Toronto (E. Rea, R. Stuart); City of Ottawa, Ottawa, Ontario, Canada (C. McDermaid); University Health Network, Toronto (M. Gardam); Ontario Agency for Health Promotion and Protection, Toronto (F. Jamieson)

Main Article

Table 5

Characteristics of isolates from 91 homeless persons with tuberculosis, Toronto, Ontario, Canada, 1998–2007*

Characteristic Culture-confirmed case, no. (%) Canada-born, no. (%) Foreign born, no. (%) p value† 1998–2002, no. (%) 2003–2007, no. (%) p value‡
RFLP type <0.001 0.13
Strain A 32 (48) 25 (52) 6 (38) 17 (59) 15 (41)
Strain B 8 (12) 7 (15) 1 (6) 3 (10) 5 (14)
Strain C 7 (11) 7 (15) 0 5 (17) 2 (5)
Strain D 3 (5) 3 (6) 0 0 3 (8)
Other strain 16 (24) 6 (13) 9 (56) 4 (14) 12 (32)
Not tested
 20
 7
 12
11
 9
Antimicrobial drug resistance 1.00 0.21
No 84 (98) 54 (98) 27 (96) 38 (95) 46 (100)
Yes§ 2 (2) 1 (2) 1 (4) 2 (5) 0

*Birthplace information available for 88 persons. RFLP, restriction fragment-length polymorphism.
†Probability of a significant difference between Canada-born and foreign-born persons for each variable; calculated by using the 2-sided Fisher exact test or χ2 test, as appropriate.
‡Probability of a significant difference between the 2 periods for each variable; calculated by using the 2-sided Fisher exact test or χ2 test, as appropriate.
§Represents 1 Canada-born person whose isolate was resistant to ethambutol only and 1 foreign-born case whose isolate was resistant to isoniazid only.

Main Article

Page created: July 25, 2011
Page updated: July 25, 2011
Page reviewed: July 25, 2011
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