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[Two cases of Achromobacter xylosoxidans sepsis]
A Kobayashi1, K Mori, M Konishi
1Second Department of Internal Medicine, Nara Medical University.
Abstract:
Achromobacter xylosoxidans is a gram-negative bacterium whose natural habitat has not been clearly defined. It has been isolated from ear discharge and the large intestine of humans and from various hospital or environmental water sources. Infection with A. xylosoxidans in humans has been documented, and resulting illnesses include meningitis, pneumonia, cholecystitis, peritonitis and urinary tract infection. Bacteremia due to A. xylosoxidans is rare, and little information on treatment is available. Two cases of bacteremia due to A. xylosoxidans in patients with hemapoietic malignancies are reported herein. Case 1 involved a 70-yr. male whose clinical diagnosis was IgA lambda-type plasmacytoma. Case 2 involved 72-yr. male whose clinical diagnosis was acute lymphatic leukemia (L2). Both patients had been catheterized. Neutropenia was noted and the white blood cell counts were 20/microliter in case 1 and 35/microliter in case 2 when A. xylosoxidans was isolated from the blood culture. We suggest that bacteremia due to A. xylosoxidans may have been related to the presence of the catheter and neutropenia.
Insights
Achromobacter xylosoxidans bacteremia is rare in humans, particularly in immunocompromised patients. This study reports two cases in patients with hematologic malignancies, suggesting a link to catheters and neutropenia.
Area of Science:
- Medical Microbiology
- Infectious Diseases
Background:
- Achromobacter xylosoxidans is a Gram-negative bacterium found in diverse environments, including hospitals.
- Human infections with A. xylosoxidans can lead to various conditions, but bacteremia is uncommon.
- Limited data exists on the treatment of A. xylosoxidans bacteremia.
Observation:
- Two cases of A. xylosoxidans bacteremia in patients with hematologic malignancies (plasmacytoma and acute lymphatic leukemia) are presented.
- Both patients had indwelling catheters and presented with neutropenia (WBC counts of 20/microliter and 35/microliter).
Findings:
- A. xylosoxidans bacteremia occurred in two immunocompromised patients.
- The presence of catheters and neutropenia were noted in both cases.
Implications:
- Catheter use and neutropenia may be risk factors for developing A. xylosoxidans bacteremia in susceptible individuals.
- Further research is needed to understand the pathogenesis and optimal treatment strategies for A. xylosoxidans bacteremia.
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