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Volume 8, Number 11—November 2002
THEME ISSUE
Tuberculosis Genotyping

Tuberculosis Genotyping Network, United States

Statewide Molecular Epidemiology of Mycobacterium tuberculosis Transmission in a Moderate- to Low-Incidence State: Are Contact Investigations Enough?

Wendy A. Cronin*Comments to Author , Jonathan E. Golub*, Monica J. Lathan†, Leonard N. Mukasa*, Nancy Hooper*, Jafar H. Razeq*, Nancy G. Baruch*, Donna Mulcahy‡, William H. Benjamin§, Laurence S. Magder¶, G. Thomas Strickland¶, and William R. Bishai#
Author affiliations: *Maryland Department of Health and Mental Hygiene, Baltimore, Maryland, USA; †American Public Health Association, Washington, D.C., USA; ‡Alabama Department of Public Health, Montgomery, Alabama, USA; §University of Alabama at Birmingham, Birmingham, Alabama, USA; ¶University of Maryland—Baltimore, Maryland, USA; #The Johns Hopkins University, Baltimore, Maryland, USA;

Main Article

Table 4

Comparison of selected risk-group characteristics of 114 recent tuberculosis (TB) patients by method of source patient identification

Characteristic Total recent
TB patients
(n=114) (%) Source patient identified by routine contact investigation
(n=72) (%) Source patient identified by cluster investigation
(n=42) (%) p value
Residence
Baltimore city 56 (49.0) 33 (45.8) 23 (54.8) 0.38
Other state jurisdictions 58 (51.0) 39 (54.2) 19 (45.2)
Country of birth
United States 104 (91.3) 63 (87.5) 41 (97.6) 0.07
Other 10 (8.7) 9 (12.5) 1 (2.4)
Long-term care resident
Yes 7 (6.1) 3 (4.2) 4 (9.5) 0.25
No 107 (93.9) 69 (95.8) 38 (90.5)
Homeless
Yes 18 (15.8) 6 (8.3) 12 (28.6) 0.004
No 96 (84.2) 66 (91.7) 30 (71.4)
Prison resident
Yes 13 (11.4) 8 (11.1) 5 (11.9) 0.86
No 101 (88.6) 64 (88.9) 37 (88.1)
Abuses alcohol
Yes 40 (35.0) 19 (26.4) 21 (50.0) 0.01
No 74 (65.0) 53 (73.6) 21 (50.0)
Uses injection drugs
Yes 17 (14.9) 11 (15.3) 6 (14.3) 0.89
No 97 (85.1) 61 (84.7) 36 (85.7)
Uses noninjection drugs
Yes 35 (30.7) 23 (31.9) 12 (28.6) 0.71
No 79 (69.3) 49 (68.1) 30 (71.4)
HIV-infected
Yes 28 (24.6) 16 (22.2) 12 (28.6) 0.45
No 86 (75.4) 56 (77.8) 30 (71.4)

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