background tubercle bacilli most often are transmitted from one person by the airborne route. the aim of the present study was to determine the frequency of latent tuberculosis infection and active pulmonary tuberculosis among patients with chronic psychiatric disorders in hamedan. patients and methods in a cross sectional study, 215 patients with chronic psychiatric disorders were investigated...

background: the tuberculin test is widely used to identify tuberculosis infection. some individuals infected with mycobacterium tuberculosis may have an initial negative skin test reaction to tuberculin. the two step purified protein derivative skin test can decrease misinterpretation of tuberculin test .this study was aimed at comparing the two- step tuberculin skin test and booster phenomenon...

Background: The tuberculin test is widely used to identify tuberculosis infection. Some individuals infected with Mycobacterium tuberculosis may have an initial negative skin test reaction to tuberculin. The two step purified protein derivative skin test can decrease misinterpretation of tuberculin test .This study was aimed at comparing the two- step tuberculin skin test and booster phenomenon...

results tst was positive in 198 (60.4%) health care workers out of 328. likelihood of positive tst among hcws increased in nurses (or = 4.617, 95% ci = 1.181-18.054, p = 0.028), increasing working experience (or = 1.178, 95% ci = 1.131 - 1.226, p < 0.001), and history of exposure to patients with tb (or = 9.035, 95% ci = 4.018 - 20.315, p < 0.001). age, gender and bcg vaccination scar were not ...

current guidelines suggest that the ppd mantoux tuberculin test should be read after 48 or 72 hours. we have compared the measurements at these time points. a 5-tuberculin unit (tu) ppd mantoux test was administered to 100 subjects (91% with bacillus calmette- guerin scars). induration was measured 48 and 72 hours following the injection. results the measurements made at 72nd hour were signific...

background: prompt diagnosis and treatment of latent tuberculosis (tb) infection (ltbi) are needed to control tb. the aim of the study was to compare the performance of quanti feron-tb test (qft) with conventional tst for the diagnosis of ltbi. methods: in this analytical - comparison study, we enrolled 87 nurses working in teaching hospitals in ahvaz. all study subjects were tested by tst.  ts...

background with respect to the prevalence of tuberculosis in our country, bcg vaccination at birth seems to be an effective means of prevention. the present study was designed to evaluate the efficiency of bcg vaccination and factors influencing the tuberculin skin reaction. materials and methods the inoculum of live bcg organisms in vaccinated infants was evaluated at birth and the correlation...

conclusion skin test anergy is uncommon among drug users and the ppd skin test may be reliably used for the identification of latent tb infection in the population. results a total of 221 patients (216 male, mean age 43.5 ± 14.3 years) were studied. tuberculin skin test results showed that 87 subjects (39.4%) tested positive for tb reactivity. reactivity to tetanus and candida antigens were obs...