Study of respiratory symptoms among sputum positive

caseation, the patient usually notice cough and sputum, often associated
with haemoptysis (Rossman and Mayock, 1999).
In this study CT was done for 15 patient, 12 was smear +ve and 3
was smear -ve for AFB. The findings were non significantly different,
although some findings appeared only in smear +ve cases as, nodular and
micronodular, single cavity, multiple small cavities and pleural effusion.
When CT findings were compared with CXR notification some findings
were not apparent in CXR as this in CT e.g. pleural effusion appeared in 3
cases by CT and only one in CXR, multiple small cavities in 2 cases by
C.T. only in one case in CXR, nodular and micro nodular in 4 cases by CT
and only 2 in CXR (tab. 30, 31 ). Many authors reported the role of CT in
diagnosis of pulmonary T8 as by Lee et al., (1995 and 1996), they
concluded that thin section CT is accurate in specific diagnosis of
pulmonary tuberculosis, by enabling differentiation ofactive tuberculosis
from inactive lesion, CT also assists in the management oftuberculosis.
Table (32) tuberculin skin test positivity in smear +ve cases were
significantly higher than in smear - ve cases. It was 75.3% in smear +ve
and 500/0 in smear -ve cases. Similar results were obtained by Stead (1969)
and Holden et al. (1971) and in our locality similar results reported by
Osman 1993 and Gamal El Din (1997). This results can be explained as
tuberculin test does not discriminate between active TB, past infection with
mycobacteria or BeG vaccinated (Kox, 1995). And also, anergic state was
attributed to compartmentalization of sensitize CD4 + T cells to sites of
active disease may playa role (Rohrbach and william, 1986). Also, ATS
(1978), reported that anergy may not always be due to failure of the
immune system to responde but may be the result ofpositive suppressive
reaction.
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