Use of DNA Probes to Detect Mycobacterium intracellulare and “X” Mycobacteria among Clinical Isolates of Mycobacterium avium Complex

A mycobacterial DNA probe (designated X) wasrecently developed to help identify Mycobacterium avium complex (MAC) isolates that are nonreactive with probes specific for M. avium or Mycobacterium intracellulare. The prevalence of X probe-positive mycobacteria in clinical specimens and their role in c...

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Bibliographic Details
Published in:The Journal of infectious diseases 1992-07, Vol.166 (1), p.191-194
Main Authors: Cregan, Patricia, Yajko, David M., Ng, Valerie L., Gonzalez, Patricia C., Nassos, Patricia S., Sanders, Cynthia A., Keith Hadley, W.
Format: Article
Language:English
Subjects:
Acquired Immunodeficiency Syndrome - microbiology
Adult
Aged
AIDS/HIV
American culture
Blood
Bronchoalveolar Lavage Fluid - microbiology
Cerebrospinal fluid
Concise Comunications
DNA Probes
DNA, Bacterial
Epidemiology
Female
HIV 1
Humans
Infections
Male
Microbiology
Middle Aged
Mycobacterium
Mycobacterium avium
Mycobacterium avium complex
Mycobacterium avium Complex - genetics
Mycobacterium avium Complex - isolation & purification
Mycobacterium avium-intracellulare Infection - microbiology
Mycobacterium intracellulare
Nucleic Acid Hybridization
Sputum - microbiology
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Summary:A mycobacterial DNA probe (designated X) wasrecently developed to help identify Mycobacterium avium complex (MAC) isolates that are nonreactive with probes specific for M. avium or Mycobacterium intracellulare. The prevalence of X probe-positive mycobacteria in clinical specimens and their role in causing disease is unknown. Using a DNA probe kit that includes the X probe, we characterized 100 consecutive clinical MAC isolates as M. avium, M. intracellulare, or X. Lysates from 81 of the isolates reacted with the M. avium probe, 13 with the M. intracellulare probe, 3 with the X probe, and 3 failed to hybridize with any of the probes. All three X-positive isolates were recovered from sputa of patients who were recent immigrants to the United States and who presented with hemoptysis. One isolate was from a Hispanic man infected with human immunodeficiency virus type 1 (HIV-1) and the other 2 were from Filipino patients with no HIV-1 risk factors. This study also showed a higher than expected number of M. intracellulare isolates from blood and cerebrospinal fluid of HIV-I-infected patients.
ISSN:0022-1899
1537-6613
DOI:10.1093/infdis/166.1.191