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Volume 8, Number 11—November 2002
Tuberculosis Genotyping

Tuberculosis Genotyping Network, United States

Quality Assessment of Mycobacterium tuberculosis Genotyping in a Large Laboratory Network

Christopher R. Braden*Comments to Author , Jack T. Crawford*, and Barbara A. Schable*
Author affiliations: *Centers for Disease Control and Prevention, Atlanta, Georgia, USA;

Main Article

Table 1

Percent of restriction fragment length polymorphism images matching reference patterna for all isolates in quality assessment panels

Panel 1
% (16 isolates, 124 images) Panel 2 
% (8 isolates, 53 images) Panel 3
% (13 isolates, 103 images) All panels
% (37 isolates, 280 images)
Match 73 85 66 73
Match ±1b 91 98 85 90
Match ±2b 98 98 96 97

aReference pattern was the pattern that matched exactly in the greatest number of laboratories.
bMatch ±1, exact match with the exception of one band; match ±2, exact match with the exception of two bands.

Main Article