The Authors describe their experience in rapid diagnosis of mycobacter
ial infections using a combination of a radiometric blood culture (Bac
tec 13 A) and a nucleic acid hybridization system (Gen probe, Accuprob
e) to detect and identify Mycobacteria. They found out that a high num
ber of septicaemias in HIV positive patients are due to Mycobacterium
avium, while in HIV negative subjects Mycobacterium tuberculosis is th
e most frequent mycobacterium.