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Antibiotic Resistance Threats in the United States, 2013 report

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DRUG-RESISTANT<br />

TUBERCULOSIS<br />

1,042<br />

DRUG-RESISTANT<br />

TUBERCULOSIS CASES<br />

IN 2011 (U.S.)<br />

10,528<br />

TUBERCULOSIS<br />

CASES IN 2011<br />

(U.S.)<br />

THREAT LEVEL<br />

SERIOUS<br />

This bacteria is a serious concern and requires prompt<br />

and susta<strong>in</strong>ed action to ensure <strong>the</strong> problem does not grow.<br />

TUBERCULOSIS IS AMONG THE MOST COMMON INFECTIOUS DISEASES AND<br />

FREQUENT CAUSES OF DEATH WORLDWIDE<br />

Tuberculosis (TB) is among <strong>the</strong> most common <strong>in</strong>fectious diseases and a frequent cause of death worldwide. TB is caused by <strong>the</strong> bacteria Mycobacterium tuberculosis<br />

(M. tuberculosis) and is spread most commonly through <strong>the</strong> air. M. tuberculosis can affect any part of <strong>the</strong> body, but disease is found most often <strong>in</strong> <strong>the</strong> lungs. In most cases, TB is<br />

treatable and curable with <strong>the</strong> available first-l<strong>in</strong>e TB drugs; however, <strong>in</strong> some cases, M. tuberculosis can be resistant to one or more of <strong>the</strong> drugs used to treat it. Drug-resistant TB<br />

is more challeng<strong>in</strong>g to treat — it can be complex and requires more time and more expensive drugs that often have more side effects. Extensively Drug-Resistant TB (XDR TB) is<br />

resistant to most TB drugs; <strong>the</strong>refore, patients are left with treatment options that are much less effective. The major factors driv<strong>in</strong>g TB drug resistance are <strong>in</strong>complete or wrong<br />

treatment, short drug supply, and lack of new drugs. In <strong>the</strong> <strong>United</strong> <strong>States</strong> most drug-resistant TB is found among persons born outside of <strong>the</strong> country.<br />

RESISTANCE OF CONCERN<br />

■■<br />

■■<br />

■■<br />

■■<br />

<strong>Resistance</strong> to antibiotics used for standard <strong>the</strong>rapy<br />

<strong>Resistance</strong> to isoniazid (INH)<br />

Some TB is multidrug-resistant (MDR), show<strong>in</strong>g resistance to at least INH<br />

and rifampic<strong>in</strong> (RMP), two essential first-l<strong>in</strong>e drugs<br />

Some TB is XDR TB, def<strong>in</strong>ed as MDR TB plus resistance to any<br />

fluoroqu<strong>in</strong>olone and to any of <strong>the</strong> three second-l<strong>in</strong>e <strong>in</strong>jectable drugs<br />

(i.e., amikac<strong>in</strong>, kanamyc<strong>in</strong>, capreomyc<strong>in</strong>)<br />

PUBLIC HEALTH THREAT<br />

Of a total of 10,528 cases of TB <strong>in</strong> <strong>the</strong> <strong>United</strong> <strong>States</strong> <strong>report</strong>ed <strong>in</strong> 2011, antibiotic<br />

resistance was identified <strong>in</strong> 1,042, or 9.90%, of all TB cases.<br />

Number of cases<br />

Cases per 100,000<br />

U.S. population<br />

Percent of all TB<br />

cases <strong>in</strong> U.S.<br />

Any first-l<strong>in</strong>e resistance 1,042 0.33 10%<br />

INH resistance 740 0.24 7%<br />

MDR TB 124 0.04 1%<br />

XDR TB 6 0.0019

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