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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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