Research
In areas where TB is highly endemic, it is not unusual to encounter patient with a fever, but in whom no source of infection is found. The physician may then, after extensive investigation has excluded all other diseases, resort to a trial of TB treatment. The regimen used is HEZ for a minimum of three weeks; RMP and STM are omitted from the regimen because they are broad spectrum antibiotics, whereas the other three first-line drugs treat only mycobacterial infection. Resolution of the fever after three weeks of treatment is good evidence for occult TB and the patient should then be changed to conventional TB treatment (2HREZ/4HR). If the fever does not resolve after three weeks of treatment then it is reasonable to conclude that the patient has another cause for his fever.
This approach is not without its critics, who argue that all such patients should instead be treated as having TB.
Read more about this topic: Tuberculosis Management
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