Streptococcus gallolyticus ssp. pasteurianus bacteremia during chemotherapy-induced neutropenia in a patient with malignant lymphoma

Hiroshima Journal of Medical Sciences Volume 69 Issue 2 Page 47-50 published_at 2020-06-30
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Title ( eng )
Streptococcus gallolyticus ssp. pasteurianus bacteremia during chemotherapy-induced neutropenia in a patient with malignant lymphoma
Creator
TOISHIGAWA Kayo
Source Title
Hiroshima Journal of Medical Sciences
Volume 69
Issue 2
Start Page 47
End Page 50
Journal Identifire
[PISSN] 0018-2052
[EISSN] 2433-7668
[NCID] AA00664312
Abstract
Background: Streptococcus gallolyticus ssp. pasteurianus is a commensal bacterium of the alimentary tract in humans and animals. This microorganism not only causes sepsis, endocarditis, and meningitis but is also associated with colorectal tumors. We report herein a rare case of S. gallolyticus ssp. pasteurianus bacteremia in a patient with concomitant colon cancer and aggressive malignant lymphoma during the neutropenic period after chemotherapy against lymphoma.
Case presentation: A 79-year-old man was found to have an adenoma in the ascending colon, and endoscopic mucosal resection (EMR) was planned to remove the lesion. However, he was diagnosed with diffuse large B-cell lymphoma during the pre-operation examination. The EMR was postponed, and he received rituximab, cyclophosphamide, etoposide, vincristine, and prednisolone (R-CEOP). He had a neutropenic fever with positive blood cultures for S. gallolyticus ssp. pasteurianus during the first course of R-CEOP. He improved as soon as cefepime was administered. Bacteremia did not recur thereafter, and he underwent EMR after completing six cycles of R-CEOP. The histological diagnosis of the colon tumor was well-differentiated adenocarcinoma in adenoma. Streptococcus gallolyticus ssp. pasteurianus was not detected in the culture of the resected tissue.
Conclusion: Although there have been few reports of bloodstream infection due to S. gallolyticus ssp. pasteurianus in patients with hematological malignancies undergoing cytotoxic chemotherapy, physicians should investigate the presence of coexisting colorectal tumors when this bacterium is isolated from blood cultures.
Keywords
Streptococcus gallolyticus ssp. pasteurianus
febrile neutropenia
malignant lymphoma
Language
eng
Resource Type departmental bulletin paper
Publisher
Hiroshima University Medical Press
Date of Issued 2020-06-30
Rights
Copyright (c) 2020 Hiroshima University Medical Press
Publish Type Version of Record
Access Rights open access
Source Identifier
[ISSN] 0018-2052
[ISSN] 2433-7668
[NCID] AA00664312
[DOI] 10.24811/hjms.69.2_47
[DOI] https://doi.org/10.24811/hjms.69.2_47