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2022, Cilt 52, Sayı 2, Sayfa(lar) 139-143
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Moraxella Bacteremia: Three Case Reports
Özgenur Demirkol1, Meltem Sarı1, Ayşegül Karahasan1, Marisa Marku2, Nuri Çağatay Çimşit3
1Marmara Üniversitesi, Tıp Fakültesi, Pendik Eğitim ve Araştırma Hastanesi, Tıbbi Mikrobiyoloji Anabilim Dalı, İstanbul, Türkiye
2Marmara Üniversitesi, Tıp Fakültesi, Pendik Eğitim ve Araştırma Hastanesi, Enfeksiyon Hastalıkları Klinik Mikrobiyoloji Anabilim Dalı, İstanbul, Türkiye
3Marmara Üniversitesi, Tıp Fakültesi, Pendik Eğitim ve Araştırma Hastanesi, Radyoloji Anabilim Dalı, İstanbul, Türkiye
Keywords: Moraxella, bacteremia, pneumonia

Objective: Moraxella species are Gram-negative, oxidase and catalase-positive bacteria that can colonize mucosal surfaces. Moraxella catarrhalis, the most commonly detected species, is one of the most frequently isolated pathogens in childhood sinusitis, otitis media and chronic lower respiratory tract disease in adults. It can cause pneumonia in immunocompromised patients or those with chronic obstructive pulmonary disease (COPD). M. catarrhalis pneumonia is rarely associated with bacteremia. M. catarrhalis is mostly resistant to beta-lactams due to its BRO-1 and BRO-2 genes. We present three cases of Moraxella isolated from blood samples in our study.

Methods: Cases in which Moraxella species were grown in blood cultures between December 2020 and October 2021 at Marmara University Pendik Training and Research Hospital were examined.

Results: Moraxella catarrhalis caused bacteremia after pneumonia in two patients. Operated for breast cancer, A 68-year-old female patient with diabetes mellitus died on the 8th day despite antibiotic treatment, and a 3-year-old male patient without a chronic disease was discharged after 10 days of antibiotic treatment. Our third case, a 46-year-old female patient who was diagnosed with chronic lymphocytic leukemia and breast cancer and received chemotherapy, developed bacteremia due to Moraxella nonliquefaciens after sinusitis, and this patient recovered with antibiotic treatment.

Conclusion: Gram-negative diplococci are rarely detected in blood samples, and when it is possible to warn the clinician at an early stage with careful direct examination, initiation of effective antibiotic therapy is life-saving.


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