Community-acquired pneumonia with Acinetobacter radioresistens bacteremia in an immunocompetent host: A case report

• Published in: Asian Pacific Journal of Tropical Medicine
• Main Authors: Yi Hern Tan, Lishan Jessica Quah, Humaira Shafi
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wolters Kluwer Medknow Publications 2019
• Subjects: acinetobacter baumanii; blaoxa-23 gene; carbapenem-hydrolyzing oxacillinases; rare respiratory infections; Arctic medicine. Tropical medicine; RC955-962; Arctic
• Online Access: https://doi.org/10.4103/1995-7645.261308; https://doaj.org/article/f713da2916224e1fb8cfd1dce98ebb2b

Rationale: Acinetobacter radioresistens is a non-fermentative Gram-negative coccobacillus that is environmentally ubiquitous and is an uncommon cause of pneumonia in an immunocompetent patient with no known chronic medical illness. Patient concerns: A middle-aged Asian male with a smoking history presented with fever and cough. Physical examination was unremarkable. Chest imaging was consistent with pulmonary parenchymal infection and blood culture grew Acinetobacter radioresistens. Diagnosis: Community acquired pneumonia with Acinetobacter radioresistens bacteremia. Interventions: The patient received a combination of intravenous and oral ampicillin-sulbactam over 2 weeks. Outcomes: Repeat blood cultures showed resolution of bacteremia. Completion of antimicrobial treatment saw resolution of respiratory symptoms and radiological pneumonic changes. Lessons: Acinetobacter radioresistens causing community-acquired pneumonia in an immunocompetent host has never been described before. It may be a novel emerging infectious agent in pulmonary infections. Its clinical course in this immunocompetent patient appears to be relatively benign.