alexa Cutaneous Ulcerations Due To Infection with Stenotrophomonas Maltophilia | OMICS International
ISSN: 2155-9554
Journal of Clinical & Experimental Dermatology Research
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Cutaneous Ulcerations Due To Infection with Stenotrophomonas Maltophilia

Aviva C Berkowitz1, Caren Waintraub1, Alexandra Flamm1*, Catherine Ding1 and Katy Burris1,2

1SUNY Downstate, Department of Dermatology, Brooklyn, Newyork, USA

2Department of Dermatology, Hofstra North Shore LIJ School of Medicine, Manhasset, Newyork, USA

*Corresponding Author:
Alexandra Flamm
SUNY Downstate, Department of Dermatology
450 Clarkson Ave, Box 46, Brooklyn, NY 11203, USA
Tel: 718-270-1229
Fax: 718-270-2794
E-mail: [email protected]

Received December 10, 2014; Accepted January 22, 2015,; Published January 29, 2015

Citation: Berkowitz AC, Waintraub C, Flamm A, Ding C, Burris K (2015) Cutaneous Ulcerations Due To Infection with StenotrophomonasMaltophilia . J Clin Exp Dermatol Res 6:258. doi: 10.4172/2155-9554.1000258

Copyright: © 2015 Berkowitz AC et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Abstract

Stenotrophomonas maltophilia is an aerobic gram-negative bacillus that most commonly causes infection in immune-compromised hospitalized individuals, especially those with hematologic malignancy, neutropenia, and history of treatment with broad-spectrum antibiotics. This infection has been known to affect multiple organ systems, but cutaneous involvement has been increasingly recognized over the years, albeit still relatively rare. Here we report a case of ulcerations on the palm and wrist, which were found to be positive for S. maltophilia. We also review the various skin and mucocutaneous findings that have been reported with this organism as well as treatment for this often multiple drug resistant organisms.

Introduction

Stenotrophomonas maltophilia is a gram-negative bacillus with both aerobic and anaerobic capabilities and is associated with nosocomial and community-acquired infections [1]. Initially thought to be a relative of Pseudomonas , and classified as Pseudomonas maltophilia , it was later recognized as its own species of the genus Stenotrophomonas . The organism primarily causes infections in immune-compromised patients, frequently via colonization of synthetic devices and machinery [2]. Clinically, S. maltophilia can cause bacteremia, endocarditis and respiratory, urinary, ophthalmologic, and central nervous system infections, as well as skin and soft tissue infections, as we describe in the case below [1,3].

Case Report

Dermatology was consulted in the inpatient setting to evaluate ulcerations on the wrist of a 68-year-old Panamanian male present for at least one week (Figure 1). The patient had originally been admitted approximately one month prior for dehydration, increasing weakness, diabetic ketoacidosis and acute kidney injury. He was soon after transferred to the intensive care unit due to multiorgan failure and was treated with 3 weeks of linezolid and ceftriaxone for MRSA pneumonia and a urinary tract infection. Past medical history included prostate cancer and diabetes mellitus.

clinical-dermatology-wrist-palm

Figure 1: Ulcerations of the right ventral wrist and palm.

Physical examination was notable for several well-demarcated ulcerations with angulated borders and fibrinous yellow exudate on the right ulnar wrist and palmar surface of the right hand. Several rounds, superficial ulcerations were found on the mucosal surface of the lower lip. Viral cultures and biopsies for H&E and tissue culture were performed. Viral cultures were negative for growth, and H&E demonstrated multiple bacterial colonies in the dermis that were negative on gram stain but positive on PAS and GMS (Figure 2). Tissue culture grew S. maltophilia , sensitive to ceftazidine and trimethoprim-sulfamethoxazole (TMP-SMX), along with Staphylococcus aureus. Urine culture was also positive for S. maltophilia . The patient then completed a week course of Bactrim DS with eventual resolution of the cutaneous findings and clearance of urine cultures.

clinical-dermatology-palm-ulcer

Figure 2: Histopathologic findings of right palm ulcer on H&E at 4x (A) and 40x (B). Gram stain, GMS, and PAS at 40x (C-E), shown respectively.

Discussion

S. maltophilia can cause a variety of mucocutaneous findings. Vartivarian described five patients with S. maltophilia -related primary cellulitis, mostly associated with catheter use, as well as six patients with metastatic cellulitis [2]. Cellulitis-like lesions of the legs and chest have also been described in three additional patients, likely due to septic emboli [4]. Ecthyma gangrenosum has been reported in association with S. maltophilia infection in a patient with a recent allogeneic bone marrow transplantation [5]. Mucocutaneous infections, as seen here, have also been noted, with ulcerations described on the lips, gingiva, and buccal mucosa [2]. Non-healing leg and foot ulcers and digital skin ulcer associated with the pathogen have also been described [6-8].

Hospitalized patients who are immunocompromised are at greatest risk of developing infection with S. maltophilia , though cases in immunocompetent individuals have rarely been described [6,8]. Most occur in the setting of malignancy, particularly hematologic cancers being treated with chemotherapy. Other risk factors include administration of broad-spectrum antibiotics and use of intravenous catheters, mechanical ventilation or tracheotomy [3,4,6,9,10].

The route of infection is not entirely known, but it seems that the organism invades via damaged skin and mucous membranes, or colonization of venous catheters, and then spreads hematogenously [2,4,10]. Recovery is dependent upon early recognition of the infection and treatment with effective antibiotics [1,10]. S. maltophilia has become resistant to many broad-spectrum antimicrobial agents, including beta-lactams, carbapenems and aminoglycosides; therefore, the current therapy of choice is TMP-SMX, due to its activity against most strains of the bacterium. Removal of all associated invasive synthetic devices is also critical [2].

It is important that S. maltophilia be considered in the differential diagnosis of a skin or soft tissue infection in an immunocompromised patient with malignancy, particularly due to its high resistance to therapy. Our case contributes to the growing body of knowledge regarding skin manifestations attributed to S. maltophilia infection, and highlights the need to consider this pathogen when presented with an ulcer of unknown etiology in an immunocompromised patient.

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