Administrative Rules of Montana
Department 37 - PUBLIC HEALTH AND HUMAN SERVICES
Chapter 37.114 - COMMUNICABLE DISEASE CONTROL
Subchapter 37.114.10 - Tuberculosis Control
Rule 37.114.1001 - TUBERCULOSIS DIAGNOSIS
Universal Citation: MT Admin Rules 37.114.1001
Current through Register Vol. 18, September 20, 2024
(1) A case of active tuberculosis disease exists if the case meets the laboratory or clinical criteria in (2) or (3).
(2) Laboratory criteria for active tuberculosis diagnosis:
(a) isolation of M. tuberculosis complex from
a clinical specimen;
(b)
demonstration of M. tuberculosis complex from a clinical specimen by nucleic
acid amplification test; or
(c)
demonstration of acid-fast bacilli in a clinical specimen when a culture has
not been or cannot be obtained or is falsely negative or contaminated.
(3) Clinical criteria for active tuberculosis diagnosis:
(a)
usually a positive tuberculin skin test result or positive interferon gamma
release assay for M. tuberculosis;
(b) other signs and symptoms compatible with
tuberculosis are for example: abnormal chest radiograph, abnormal chest
computerized tomography scan or other chest imaging study, or clinical evidence
of current disease;
(c) treatment
with two or more antituberculosis medications; and
(d) a completed diagnostic evaluation.
(4) A case of latent tuberculosis infection exists if the case meets the laboratory and clinical criteria in (5) and (6).
(5) Laboratory criteria for latent tuberculosis infection:
(a) a
positive tuberculin skin test (TST); or
(b) a positive interferon gamma release assay
(IGRA).
(6) Clinical criteria for latent tuberculosis infection:
(a) no clinical evidence compatible with TB
disease including no signs or symptoms consistent with TB disease;
and
(b) chest imaging without
abnormalities consistent with TB disease (chest radiograph or CT scan);
or
(c) abnormal chest imaging that
could be consistent with TB disease with microbiologic testing that is negative
for abnormal chest imaging that could be consistent with TB disease with
microbiologic testing that is negative for Mycobacterium Tuberculosis Complex
and where TB disease has been clinically ruled out.
AUTH: 50-1-202, 50-17-103, 50-17-105, MCA; IMP: 50-1-202, 50-17-103, 50-17-105, MCA
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