Study of respiratory symptoms among sputum positive

An induration of 2 1Omm is classified as positive in all persons who
do not meet any of the above criteria but who belong to one is more of the
following groups having high risk for TB. Injected-dmg users know to be
HIV seronegative persons who have other medical conditions that have
been reported to increase the risk for progressing from latent TB infection
to active TB, including diabetes mellitus, conditions requiring prolonged
high-dose corticosteroid therapy and other immunosuppressive therapy
(including bone marrow and organ transplantation), chronic renal failure,
some hematologic disorders (e.g. leukemias and lymphomas). Other
specific malignancy (e.g. carcinoma of the head or neck). Weight loss of
210 % below ideal body weight, silicosis, gastrectomy and jegunoileal
bypass. Residents and employees of high risk. Children < 4 years of age or
infants, children and adolescents exposed to adults in high-risk categories.
Congegate setting: prisons, jails, nursing homes and other long-
tern1 facilities for the elderly, l~ealth care facilities (including some
residential mental health facilities), and homeless shelters.
An induration of > 15mm is classified as positive in persons who do
not meet any of the above criteria (Bloch, 1998).
b- Medical research council test:
A new diagnostic test for TB has been described that can be done as
two skin tests, or from blood samples based on the reaction to 38.A and
38.G peptide of 38 kDa. Reaction to peptide 38.A identifies people who
have had BCG vaccination or previous TB, or those who have active TB.
Reaction to 38.G identifies people the first two of these categories but not
the third, as people with active TB lose the T-cell response to it. Thus, the