Clinical Microbiology Reviews, Oct 1996, 435-447, Vol 9, No. 4
MA Saubolle, TE Kiehn, MH White, MF Rudinsky and D Armstrong
Reports of the association of Mycobacterium haemophilum with disease in
humans have greatly increased. At least 64 cases have now been reported,
with symptoms ranging from focal lesions to widespread, systemic disease.
The organism is now known to cause primarily cutaneous and subcutaneous
infection, septic arthritis, osteomyelitis, and pneumonitis in patients who
are immunologically compromised and lymphadenitis in apparently
immunocompetent children. Underlying conditions in the compromised patients
have included AIDS; renal, bone marrow, and cardiac transplantation;
lymphoma; rheumatoid arthritis; marrow hypoplasia; and Crohn's disease.
Reports have originated from diverse geographic areas worldwide. The
epidemiology of M. haemophilum remains poorly defined; there appears to be
a genetic diversity between strains isolated from different regions. The
organism is probably present in the environment, but recovery by sampling
has not been successful. M. haemophilum has several unique traits,
including predilection for lower temperatures (30 to 32 degrees C) and
requirement for iron supplementation (ferric ammonium citrate or hemin).
These may in the past have compromised recovery in the laboratory. Therapy
has not been well elucidated, and the outcome appears to be influenced by
the patient's underlying immunosuppression. The organisms are most
susceptible to ciprofloxacin, clarithromycin, rifabutin, and rifampin.
Timely diagnosis and therapy require communication between clinician and
the laboratory.
Copyright © 1996 by the American Society for Microbiology. All rights reserved.
Mycobacterium haemophilum: microbiology and expanding clinical and geographic spectra of disease in humans
Department of Pathology, Good Samaritan Regional Medical Center, Phoenix, Arizona 85006, USA.
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