Tuberculin Skin Test Interpretation - Threshold for treatment
Induration cutoff >5mm:
• Recent exposure to an individual with active TB
• Abnormal CXR consistent with old TB disease
• HIV infected patients
• Immunocompromised patients
Induration cutoff >10mm:
• Children > 4 years of age
• Born in countries with incidence
• Residents/employees in high risk settings (healthcare facilities, prisons/jails, homeless shelters, mycobacteriology labs)
• Patients who have:
• kidney disease and are on hemodialysis
• diabetes mellitus
• leukemia/lymphoma or carcinoma of head/neck/lung
• jejunoileal bypass
• silicosis
• Underweight
• Injection drug users
Induration cutoff >15mm:
• Healthy individuals
#Tuberculosis #Tuberculin #SkinTest #TST #diagnosis #Interpretation #Induration #Criteria #Thresholds #PPD
