Evidence Hub

Lung Infection Due to Species Infrequently Isolated in the Community Setting: Klebsiella variicola and Acinetobacter baumannii

Geller M, Suchmacher M, Sitnoveter A, Nigri R

Cureus, 2026

Abstract

The authors report a case of pulmonary infection caused by two typically nosocomial bacterial agents, Klebsiella variicola and Acinetobacter baumannii, simultaneously evidenced in a 65-year-old male patient from the community. Both diagnoses were established after culture and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) analysis of sputum, and the patient was successfully treated with oral levofloxacin, with microbiological eradication subsequently confirmed by three negative follow-up sputum cultures. The singularity of this case challenges the conventional paradigm distinguishing community- and hospital-acquired infections and underscores the importance of maintaining a high index of suspicion for atypical pathogens in routine clinical practice.

How strong is the evidence?

Evidence Hub reads this as a case report, done in people. Its evidence level is 5 of 5 (Very low · case / narrative / animal / in vitro / in silico). Case reports, narrative reviews, and animal, cell or computer-model studies give the weakest evidence for human health.

How the five levels of evidence work. The level is assigned automatically from the abstract and can be wrong, so check the paper.

Read the paper

Related studies

Go deeper in Evidence Hub

Evidence Hub adds a study data sheet (design, sample size, evidence level, key numbers), an AI summary and a chat grounded in the paper's text.

Open this study Sign up free