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Why is multidrug-resistant tuberculosis difficult to treat?
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antimicrobial agent
Iodine, as in the form of Dobell's iodine solution, is an effective antimicrobial agent.
Multidrug-resistant tuberculosis (MDR-TB) is difficult to treat primarily because the causative bacilli have developed resistance to the two most effective first-line antituberculosis drugs: isoniazid and rifampicin.123
Because standard antibiotics are ineffective against these resistant strains, treatment requires more complex regimens involving alternative agents. These challenges include:4
- Increased Toxicity: The alternative drugs used to treat MDR-TB are often associated with more severe side effects than standard first-line medications.14
- Extended Duration: A successful cure typically requires a significantly longer treatment period, often lasting up to two years.1
- Adherence Difficulties: The length and complexity of the required therapy make it difficult for patients to maintain consistent adherence to the treatment regimen.4
- Limited Options: If treatment is incomplete, the bacilli can develop further resistance, potentially progressing to extensively drug-resistant tuberculosis (XDR-TB), which is even harder to manage and requires aggressive, specialized drug combinations.123
Effective management often relies on directly observed therapy (DOT) to ensure patient compliance and prevent the further spread of resistant strains.1