Thursday, September 2, 2010


This is from a blood culture of a 50 year old HIV positive patient who has never been on antiretrovirals, now with a CD4 count of 4 (nadir) who presents with fever, night sweats, abdominal pain, diarrhea, and weight loss. Labs show anemia, elevated alkaline phosphatase, and elevated LDH.

Challenge: Diagnosis?

Image is in the public domain.


city said...

that has to be MAC

Z said...

It looks like acid fast bacilli - TB?

Craig Chen said...

yes acid fast bacilli - mac!

This is Mycobacterium avium complex (MAC) infection (the title refers to a Big Mac).

Sources: UpToDate; Wikipedia.