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TB Elimination. Treatment Options for Latent TB Infection

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TB Elimination. Treatment Options for Latent TB Infection TB Elimination Treatment Options for Latent Tuberculosis Infection Introduction Table1: Candidates for the Treatment of Latent TB Infection Treatment of latent tuberculosis (TB) infection (LTBI) is essential to controlling and eliminating Groups Who Should be Given High Priority for TB in the United States, because it substantially Latent TB Infection Treatment reduces the risk that TB infection will progress to TB disease. Certain groups are at very high risk People who have a People who have a of developing TB disease once infected. Once positive IGRA result or positive IGRA result or the diagnosis of LTBI has been made, health care a TST reaction of 5 or a TST reaction of 10 or providers must choose the most appropriate and more millimeters more millimeters effective treatment regimen, and make every effort • HIV-infected persons • Recent immigrants to ensure those persons complete the entire course (< 5 years) from high- of treatment for LTBI. • Recent contacts of a TB case prevalence countries However, if exposed to and infected by a person • Persons with • Injection drug users with multidrug-resistant TB (MDR TB) or extensively fibrotic changes on • Residents and drug-resistant TB (XDR TB), preventive treatment chest radiograph employees of high- may not be an option. consistent with old risk congregate TB settings (e.g., Pretreatment Evaluation • Organ transplant correctional facilities, recipients nursing homes, To decide whether an individual who has a positive homeless shelters, tuberculin skin test (TST) or interferon gamma • Persons who are hospitals, and other release assay (IGRA) result is a candidate for immunosuppressed health care facilities) treatment of LTBI for other reasons (e.g., taking the • Mycobacteriology • Determine the benefits of treatment by equivalent of laboratory personnel evaluating the individual’s risk for developing >15 mg/day of • Children under TB disease prednisone for 1 4 years of age, • Assess the person’s level of commitment month or longer, or children and to completion of treatment and resources taking TNF-α adolescents exposed available to ensure adherence antagonists) to adults in high-risk categories Once the decision is made to treat an individual for LTBI, the health care provider must establish rapport with the patient and Persons with no known risk factors for TB may be considered for treatment of LTBI if they have • Discuss benefits and risks of treatment either a positive IGRA result or if their reaction • Review possible medication side effects or to the TST is 15 mm or larger. However, targeted drug interactions TB testing programs should only be conducted • Emphasize importance of adherence among high-risk groups. All testing activities should be accompanied by a plan for follow-up care for • Identify potential barriers to adherence persons with TB infection or disease. • Establish a plan to ensure adherence (Page 1 of 3) National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention Division of Tuberculosis Elimination CS228419_E Choosing the Most Effective Regimen Isoniazid (INH) Treatment of LTBI should be initiated after the The standard treatment regimen for LTBI is possibility of TB disease has been excluded. Persons nine months of daily INH. This regimen is very suspected of having TB disease should receive the effective and is the preferred regimen for HIV- recommended multidrug regimen for treatment infected people taking antiretroviral therapy, of disease until the diagnosis is confirmed or ruled and children aged 2-11 years of age. out. Isoniazid (INH) and Rifapentine (RPT) Consultation with a TB expert is advised if the Regimen known source of TB infection has drug-resistant TB. The 12-dose regimen of INH and RPT does not Table 2. Latent TB Infection Treatment Regimens replace other recommended LTBI treatment regimens; it is another effective regimen Minimum option for otherwise healthy patients aged ≥12 Drugs Duration Interval doses years who have predictive factor for greater likelihood of TB developing, which includes Daily 270 recent exposure to contagious TB, conversion Isoniazid 9 months from negative to positive on an indirect test Twice 76 for infection (i.e., interferon-γ release assay or weekly* tuberculin test), and radiographic findings of healed pulmonary TB. Daily 180 Isoniazid 6 months Twice This regimen is not recommended for 52 weekly* • Children younger than 2 years old, Isoniazid & Once 3 months 12 Rifapentine weekly* • People with HIV/AIDS who are taking antiretroviral treatment, Rifampin 4 months Daily 120 • People presumed to be infected with INH or RIF-resistant M. tuberculosis, and *Use Directly Observed Therapy (DOT). Note: Due to the reports of severe liver injury and • Pregnant women or women expecting deaths, CDC recommends that the combination to become pregnant within the 12-week of rifampin (RIF) and pyrazinamide (PZA) should regimen. generally not be offered for the treatment of latent TB infection. Adverse Drug Reactions Patients on treatment for LTBI should be Although regimens are broadly applicable, there instructed to report any signs and symptoms are modifications that should be considered of adverse drug reactions to their health care under special circumstances (e.g., HIV infection, provider, including suspected drug resistance, pregnancy, or treatment • Unexplained anorexia, nausea or vomiting, of children). Table 2 lists the current recommended dark urine*, or icterus regimens. Refer to Targeted Tuberculin Testing and Recommendations for Use of an Isoniazid– • Persistent paresthesia of hands or feet Rifapentine Regimen with Direct Observation to Treat • Persistent weakness, fatigue, fever, or Latent Mycobacterium tuberculosis Infection for abdominal tenderness detailed information about the treatment of LTBI. • Easy bruising or bleeding (Page 2 of 3) *Advise patients taking RIF or RPT that they will Additional Information notice a normal orange discoloration of body fluids, 1. ATS/CDC. Targeted tuberculin testing and including urine and tears. Contact lenses may be treatment of latent TB infection. (PDF) MMWR permanently stained. 2000;49(No. RR- 6). http://www.cdc.gov/ Obtain a list of patient’s current medications to MMWR/PDF/rr/rr4906.pdf avoid drug interactions. Some interactions to note: 2. CDC. Recommendations for Use of an Isoniazid–Rifapentine Regimen with Direct • INH increases blood levels of phenytoin Observation to Treat Latent Mycobacterium (Dilantin) and disulfiram (Antabuse) tuberculosis Infection. MMWR 2011; 60:1650 • RIF and RPT decrease blood levels of many –1653. http://www.cdc.gov/mmwr/ drugs including oral contraceptives, warfarin, preview/mmwrhtml/mm6048a3.htm?s_ sulfonureas, and methadone cid=mm6048a3_w 3. CDC. Update: Adverse Event Data and • RIF and RPT are contraindicated in HIV-infected Revised American Thoracic Society/CDC individuals being treated with protease Recommendations Against the Use of inhibitors (PIs) and most nonnucleoside reverse Rifampin and Pyrazinamide for Treatment of transcriptase inhibitors (NNRTIs) Latent Tuberculosis Infection. MMWR 2003; 52 (No. 31). http://www.cdc.gov/mmwr/preview/ Monitoring During Treatment mmwrhtml/mm5231a4.htm Baseline and routine laboratory monitoring during 4. Updated Guidelines for the Use of Rifamycins treatment of LTBI are indicated only when there is a for the Treatment of Tuberculosis Among HIV- history of liver disease, HIV infection, pregnancy (or Infected Patients Taking Protease Inhibitors within 3 months post delivery), or regular alcohol or Nonnucleoside Reverse Transcriptase use. Baseline hepatic measurements of serum Inhibitors. MMWR 2004: 53 (No. 2). http:// AST, ALT, and bilirubin are used in the situations www.cdc.gov/mmwr/preview/mmwrhtml/ mentioned above and to evaluate symptoms mm5302a6.htm of hepatotoxicity. Laboratory testing should be performed to evaluate possible adverse reactions 5. Latent Tuberculosis Infection: A Guide for that occur during the treatment regimen. Primary Health Care Providers. http://www. cdc.gov/tb/publications/LTBI/default.htm Clinical monitoring, including a brief physical 6. Targeted Tuberculosis (TB) Testing and examination, should occur at monthly visits to Treatment of Latent TB Infection. http://www. assess adherence, rationale for treatment, and cdc.gov/tb/publications/slidesets/LTBI/default. to identify signs or symptoms of adverse drug htm reactions. 7. Treatment of Latent Tuberculosis Infection: CDC collects reports of all severe adverse events Maximizing Adherence. http://www.cdc. (e.g., liver injury, metabolic acidosis, anaphylaxis, gov/tb/publications/factsheets/treatment/ seizure, severe dermatitis) leading to hospitalization LTBIadherence.htm or death of a person receiving treatment for 8. CDC Division of Tuberculosis Elimination LTBI. Report these adverse events to the Division website http://www.cdc.gov/tb of Tuberculosis Elimination by sending an email to [email protected]. http://www.cdc.gov/tb (Page 3 of 3) November 2011.
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