Evidence map›Paper›PMID 41612269›Full record

ArticleBMC infectious diseases2026

Microbiological findings and antibiotic treatment in community-acquired pneumonia: a retrospective cohort study.

Sabisan Shanmuganathan, Jette Brommann Kornum, Niels Henrik Bruun, Lone Hagens Mygind

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Article in BMC infectious diseases, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

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1citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

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2 · The registry

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3 · Its place in the literature

Who cites it

1 citing paper in PubMed.

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4 · The record

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5 · Who and what money

Authors and funding

4 authors.

Sabisan ShanmuganathanDepartment of Infectious Diseases, Aalborg University Hospital, Aalborg, 9000, Denmark. sabisan.shan@gmail.com.
Jette Brommann KornumDepartment of Clinical Microbiology, Aalborg University Hospital, Aalborg, 9000, Denmark.
Niels Henrik BruunDepartment of Research Data and Biostatistics, Aalborg University Hospital, Aalborg, 9000, Denmark.
Lone Hagens MygindDepartment of Infectious Diseases, Aalborg University Hospital, Aalborg, 9000, Denmark.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundNational and regional guidelines are regularly updated to ensure the correct diagnosis and treatment of pneumonia while minimizing unnecessary antibiotic use. However, recent microbiological studies have raised concerns about the recommendations in Danish guidelines. This study aimed to describe the aetiology, empirical antibiotic treatment, and adherence to guidelines in the management of hospitalised patients with community-acquired pneumonia (CAP).

methodsThis retrospective cohort study included all adults hospitalised with CAP at the Emergency Department of Aalborg University Hospital, Denmark, over a one-year period from November 2021 to October 2022. Hospital records were reviewed, and the microbiological data and the antibiotic therapy were analysed.

resultsA total of 366 patients were included in the study. The most frequently identified pathogen was Haemophilus influenzae (25%), followed by influenza A (22%), Staphylococcus aureus (9%), respiratory syncytial virus (9%) and Streptococcus pneumoniae (8%). H. influenzae was the dominant bacterial pathogen in both patients with COPD and without COPD. S. aureus was among the most commonly detected pathogens in patients with a CURB-65 score of 3–5 (22%). Regarding antibiotic treatment, 41% of the patients did not receive the recommended therapy. Non-adherence to the guidelines was primarily driven by the overuse of broad-spectrum antibiotics. At admission time, the most commonly prescribed empirical antibiotics were amoxicillin/clavulanic acid (33%), piperacillin/tazobactam monotherapy (23%) and penicillin monotherapy (21%), respectively.

conclusionOur study found that H. influenzae was the most frequently detected bacterial pathogen identified in both patients with and without COPD hospitalised with CAP. These findings highlight the need to reconsider the empirical treatment recommendations in the Danish guidelines. Amoxicillin/clavulanic acid was the most commonly prescribed empirical antibiotic. However, a substantial proportion of patients did not receive guideline-adherent treatment. Broad-spectrum antibiotic overuse was the main issue.

Indexed as

Anti-Bacterial AgentsCommunity-Acquired InfectionsCommunity-Acquired PneumoniaAdultAgedAged, 80 and overDenmarkFemaleGuideline AdherenceHaemophilus influenzaeHospitalizationHumansMaleMiddle AgedRetrospective StudiesStaphylococcus aureusAnti-Bacterial AgentsCAPGuideline adherenceHaemophilus influenzaeMicrobiological aetiologyPneumonia

Identifiers

PMID41612269
PMCPMC12924426

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