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- Jia Chen, Lijuan Pan, Shiqiang Qu, Tiejun Qin, Zhijian Xiao, and Zefeng Xu.
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China.
- Curr Med Res Opin. 2022 Mar 1; 38 (3): 371-374.
BackgroundPost-essential thrombocythemia myelofibrosis (post-ET MF) is a type of Philadelphia chromosome-negative MF. Patients with MF treated with ruxolitinib are immunosuppressed, and therefore more at risk of infection. Several opportunistic infections can occur in the first 6 months of ruxolitinib treatment. However, cases of MF complicated by intra-abdominal Streptococcus agalactiae infection during treatment with ruxolitinib are rare.Case ReportWe report the case of a 42-year-old female patient who had resumed ruxolitinib at 20 mg twice daily on 28 February 2020 and was referred for management of JAK2V617F-positive post-ET MF on 24 April 2020. She complained of progressive abdominal distention 1 week before admission. During hospitalization, she experienced an abrupt episode of middle-grade fever without chills or peritoneal irritation. Subsequently, S. agalactiae (Group B Streptococcus, GBS) was isolated twice from ascites cultures, and an intra-abdominal infection was diagnosed. The infection was successfully treated using meropenem.ConclusionsOur case indicates that ruxolitinib is a risk factor for GBS infection in MF patients. Accurate pathogen identification is critical for effective antimicrobial treatment and improved patient outcomes.
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