A Rare Case of Parvimonas micra Bacteremia in a 90-Year-Old Male With Severe Sepsis and Multifocal Pneumonia: A Case Report

<i>Parvimonas micra</i> (<i>P. micra</i>) is an anaerobic, gram-positive coccus that is part of the normal flora of the oral cavity and gastrointestinal tract, but is rarely implicated in systemic infections. We present a case of a 90-year-old male with severe sepsis, multifocal pneumonia, and a urinary tract infection, whose blood cultures revealed <i>P. micra</i> bacteremia, an extremely rare infection. The diagnosis was made using rapid matrix-assisted laser desorption ionization-time of flight (MALDI-TOF) technology, which enabled targeted antibiotic therapy. This case emphasizes the importance of considering rare anaerobic pathogens in immunocompromised or elderly patients with sepsis, and highlights the role of advanced microbiological diagnostics in early detection and optimized medical management.