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...

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...

Background: In our 1976 controlled venom immunotherapy trial, 33% of 182 patients with a history of systemic reactions to insect stings were excluded because of negative venom skin test responses. There have been reports of patients with negative skin test responses who have had severe reactions to subsequent stings. Objective: Our aim is to increase awareness about the patient with a negative ...

Introduction:: Recent reports have suggested that gastroesophageal reflux disease (GERD) is link with cow’s milk allergy (CMA) in children. The aim of this study was to determine the frequency of CMA in young children with GERD.Materials and Methods: This cross- sectional study included 33 children (median age, 2.93±1.90 years) with GERD according to a valid gastroesophageal reflux questionnair...

OBJECTIVES To evaluate the prevalence of aetiological allergens identifiable by skin prick test alone in patients suffering from chronic rhinitis in Hong Kong, and also compare the clinical history and symptoms of skin prick test-positive versus skin prick test-negative patients. DESIGN Prospective study. SETTING Otorhinolaryngology clinic in Queen Mary Hospital of Hong Kong. PATIENTS A t...