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

Tuberculosis Genotyping Network, United States

Skin-Test Screening and Tuberculosis Transmission among the Homeless1

Po-Marn Kong*Comments to Author , Jan Tapy*, Patricia Calixto*, William J. Burman*†, Randall R. Reves*†, Zhenhua Yang‡§, and M. Donald Cave‡§
Author affiliations: *Denver Public Health, Denver, Colorado, USA; †University of Colorado Health Sciences Center, Denver, Colorado, USA; ‡Regional Tuberculosis Genotyping Laboratory, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA; §Central Arkansas Veterans Healthcare System, Little Rock, Arkansas, USA;

Main Article

Table 2

DNA fingerprinting results for culture-confirmed tuberculosis cases among homeless persons, Denver Health Tuberculosis Clinic, 1988–1998a

Years
RFLP clusters
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
Total
A 1 1 2
B 1 [1]b [2] 1 2 [3]
C 1 1 1 3
D 1 1 2
E 1 1 2
F 2 2
G 1 1 [2] 2 [2]
H 1 3 [1] 2 1 [1] 7 [2]
I 2 3 1 [2] 3 [1] 1 2 [2] [2] 12 [7]
Total clusters 1 1 4 9 [2] 4 [4] 6 [1] 3 5 [2] 0 [2] 0 [3] 1 34 [14]
Unique RFLP 1 1 3 2 3 6 3 7 5 6 5 42
Test ratioc 2/4
(50) 2/2
(100) 7/7
(100) 11/11
(100) 7/7
(100) 12/12
(100) 6/6
(100) 12/17
(71) 5/7
(71) 6/7
(86) 6/7
(86) 76/87
(87)

aRFLP, restriction fragment length polymorphism.
bNumbers in brackets refer to the 14 case isolates from nonhomeless patients that share DNA fingerprinting patterns with the homeless patients.
cNumber of case isolates with DNA fingerprinting results divided by total culture-positive cases (% tested).

Main Article

1 This study was presented in part at the 2001 International Meeting of the American Thoracic Society, San Francisco, California.

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