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September 1987

Infections Caused by Pseudomonas maltophilia: Expanding Clinical Spectrum

Author Affiliations

From the Departments of Medicine, Mercy Hospital (Dr Muder), Veterans Administration Medical Center (Drs Muder and Yu), University of Pittsburgh (Drs Dummer and Yu), and Forbes Health Center (Dr Vinson), Pittsburgh.

Arch Intern Med. 1987;147(9):1672-1674. doi:10.1001/archinte.1987.00370090148025

Pseudomonas maltophilia (Xanthomonas maltophilia) is a frequently isolated commensal that is gaining increasing recognition as an opportunistic pathogen in debilitated hosts. We report three unusual infections due to P maltophilia that illustrate the ability of the organism to cause life-threatening illness. We describe a case of postoperative meningitis, a case of recurrent bacteremia complicated by ecthyma gangrenosum, and a case of native valve endocarditis in a drug addict. Because of frequent isolation from noninfected sites, the pathogenic potential of P maltophilia may be overlooked. The notable resistance of this organism is commonly used βlactam and aminoglycoside antibiotics may complicate therapy.

(Arch Intern Med 1987;147:1672-1674)