Many serious infections involve both aerobic bacteria (which require oxygen) and anaerobic bacteria (which thrive in low-oxygen environments). Common anaerobes include Bacteroides, Clostridium, and Fusobacterium, often found in abscesses, deep wounds, and intra-abdominal infections.
This culture is ordered to investigate suspected deep tissue or visceral infections, abscess drainage, surgical site infections, bite wounds, and bloodstream infections where anaerobic involvement is possible. Susceptibility testing on significant isolates guides antibiotic selection. Proper specimen collection — avoiding air exposure and using appropriate transport media — is essential for recovering anaerobes. Sample type depends on the suspected source of infection.