Infectious Disease Compendium

Alcaligenes

Microbiology

Nonfermenting gram negative rods, includes A. denitrificans, A. faecalis, A. piechaudii, A. xylosoxidans. Found in soil and water. Some have been renamed Achromobacter.

Epidemiologic Risks

Found in soil.

Syndromes

Various infections in bad hosts, often found in open, icky wounds, such as diabetic foot infections.

Treatment

Ceftazadime, imipenem.

Notes

Quinolones, aminoglycosides, cefotaxime and ceftriaxone and, aztreonam not reliable; A. faecalis is more susceptible.