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Journal of Clinical Microbiology, 03 1996, 554-559, Vol 34, No. 3
BR Bird, MM Denniston, RE Huebner and RC Good
The resurgence of tuberculosis, which includes an increase in the isolation
of multidrug-resistant strains of Mycobacterium tuberculosis, emphasizes
the need for more rapid laboratory testing for identification of the
etiological agent of the disease. In December 1991, state and territorial
public health laboratories were surveyed to determine the methods that they
were using for testing and reporting of M. tuberculosis. A follow-up survey
was conducted in June 1994 to measure changes in the testing and reporting
practices that had occurred as a result of efforts focused on the disease
and on laboratory improvement. Completed questionnaires were received from
51 of 55 laboratories. Comparative data indicate that the proportion of
laboratories reporting testing results within the number of days
recommended by the Centers for Disease Control and Prevention has
increased. Starting from the time at which the laboratory receives the
specimen, the proportion of laboratories reporting the results of
microscopic smear examination within the recommended 24 h has increased
from 52.1 to 77.6%; the proportion reporting isolation and identification
within 21 days has increased from 22.1 to 72.9%; and the proportion
reporting results of isolation, identification, and drug susceptibility
testing within 28 days has increased from 16.7 to 48.9%. Use of the
recommended rapid testing methods has also increased: the proportion of
laboratories using fluorescence staining for acid-fast microscopy has
increased from 71.4 to 85.7%, the proportion using BACTEC for primary
culture has increased from 27.1 to 79.6%, the proportion using rapid
methods for M. tuberculosis identification has increased from 74.5 to
100.0%, and the proportion using BACTEC for primary drug susceptibility
testing has increased from 26.2 to 73.3%. By implementing the recommended
methods for M. tuberculosis testing and reporting, state and territorial
public health laboratories are now able to transmit results to physicians
more rapidly.
Copyright © 1996 by the American Society for Microbiology. All rights reserved.
Changing practices in mycobacteriology: a follow-up survey of state and territorial public health laboratories
Division of Laboratory Systems, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA. brb2@phpdls1.em.cdc.gov
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