AFB Blood Culture By Bact/Alert 3d

You should get an AFB blood culture if you have prolonged unexplained fever, night sweats, weight loss, or enlarged liver, spleen, or lymph nodes, especially with advanced HIV, organ transplant, or other immunosuppression. It is also recommended for suspected disseminated tuberculosis or MAC infection, and fever of unknown origin not responding to treatment.

No fasting is required for an AFB blood culture. Ideally, give the sample before starting TB medicines or antibiotics such as fluoroquinolones or macrolides, as these can reduce detection. Inform your doctor about any recent treatment, HIV status, or immunosuppressive medicines. Your skin will be cleaned carefully to prevent contamination, and repeat samples may be needed.

No, fasting is not required for an AFB blood culture. You can eat and drink normally before giving your sample, and it can be collected at any time of day. Ideally, the sample should be taken before starting TB medicines or antibiotics, as these can reduce the chance of detecting mycobacteria.