Latent Tuberculosis Infection Treatment Guidelines

Identification of High-Risk Groups

The Centers for Disease Control and Prevention recommends that HIV-infected persons must receive treatment given their 5-10% annual reactivation risk (compared to 5-15% lifetime risk in HIV-negative individuals) 1
The American Thoracic Society suggests that recent close contacts of persons with infectious pulmonary TB should be treated immediately, regardless of test results, after active TB is excluded 1, 2
The Centers for Disease Control and Prevention recommends that patients on immunosuppressive therapy, including those initiating anti-TNF biologics, preparing for organ or hematological transplantation, or receiving high-dose corticosteroids, should receive treatment 3, 1
The American College of Chest Physicians recommends that persons with chest radiographs showing fibrotic changes consistent with prior untreated TB should receive treatment 3, 4

The Centers for Disease Control and Prevention recommends that targeted testing should only be conducted among high-risk groups and discouraged in low-risk populations 4, 6
The American Academy of Pediatrics recommends that all children <4 years old or those exposed to adults in high-risk categories should be treated with TST ≥10 mm 3, 4
The Centers for Disease Control and Prevention recommends that isoniazid for 9 months is the only recommended regimen for children 1

The American College of Obstetricians and Gynecologists recommends that high-risk pregnant women (HIV-infected or recent infection) should receive LTBI treatment without delaying for the first trimester 1
The Centers for Disease Control and Prevention recommends that patients with drug-resistant source cases should receive alternative treatment regimens, such as rifampin + pyrazinamide for 2 months, or rifampin alone for 4 months for isoniazid-resistant, rifampin-susceptible cases 1

The American Thoracic Society recommends that active TB disease must be definitively ruled out before initiating any LTBI treatment, through history and physical examination, mandatory chest radiography, and sputum samples for acid-fast bacilli smear and culture if symptoms or abnormal chest X-ray are present 1, 2

The Centers for Disease Control and Prevention recommends that never treat LTBI without first excluding active TB disease through proper evaluation and chest radiography 1
The American College of Chest Physicians recommends that do not withhold treatment based on age alone in high-risk individuals (e.g., healthcare workers with ongoing exposure) 5
The Centers for Disease Control and Prevention recommends that avoid the rifampin-pyrazinamide regimen routinely due to unacceptable hepatotoxicity rates 1