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*
, Jan Tapy*, Patricia Calixto*, William J. Burman*†, Randall R. Reves*†, Zhenhua Yang‡§, and M. Donald Cave‡§
, Jan Tapy*, Patricia Calixto*, William J. Burman*†, Randall R. Reves*†, Zhenhua Yang‡§, and M. Donald Cave‡§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).
