Methods are described for detection of Legionella pneumophila in cooling tower water or other water sources by direct fluorescent-antibody staining. A procedure for isolation of Legionella bacteria from water samples by guinea pig inoculation is described. Two different serogroups of L. pneumophila were isolated repeatedly from one of the cooling towers.
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http://dx.doi.org/10.1128/aem.41.5.1202-1205.1981 | DOI Listing |
Int J Infect Dis
January 2025
National reference centre for Legionella pneumophila, Department of Microbiology, Universitair Ziekenhuis Brussel (UZ Brussel), Vrije Universiteit Brussel (VUB), Laarbeeklaan 101, 1090 Brussels, Belgium.
Introduction: The incidence of Legionnaires' disease (LD) steadily increases worldwide. Although Legionella pneumophila is known as pathogenic, systematic investigations into antibiotic resistance are scarce, and reports of resistance in isolates are recently emerging.
Methods: Clinical cases and metadata reported to the Belgian National Reference Centre between 2011 and 2022 were retrospectively analysed.
BMC Pulm Med
January 2025
Department of Respiratory and Critical Care Medicine, Lishui Hospital of Traditional Chinese Medicine Affiliated to Zhejiang University of Traditional Chinese Medicine, No. 800 Zhongshan Road, Liandu District, Lishui, Zhejiang, 323000, China.
Background: Legionella pneumophila is an uncommon pathogen causing community-acquired atypical pneumonia. Acinetobacter baumannii is a major pathogen responsible for hospital-acquired pneumonia, but it rarely causes serious infections in a community setting. Without prompt and appropriate treatments, infection from either of these two pathogens can cause a high mortality rate.
View Article and Find Full Text PDFJ Glob Antimicrob Resist
January 2025
Department of Infectious Diseases, Istituto Superiore di Sanità, Rome, Italy; ESCMID Study Group for Legionella Infections (ESGLI), Basel, Switzerland. Electronic address:
Background: Although antimicrobial resistance has not yet emerged as an overarching problem for Legionella pneumophila (Lp) infection, the description of clinical and environmental strains resistant to fluoroquinolones and macrolides is a cause of concern. This study aimed to investigate the antimicrobial susceptibility of Lp human isolates in Italy.
Methods: A total of 204 Lp clinical isolates were tested for sensitivity to nine antibiotics using the broth microdilution assay (BMD).
Sci Rep
January 2025
Department of Biological, Geological, and Environmental Sciences, University of Bologna, Bologna, Italy.
The identification and typing of bacteria are very expensive and time-consuming due to their growth times, and the expertise needed. MALDI-TOF MS represents a fast technique, reproducible with molecular approaches. This technique is still poorly applied in Legionella surveillance with estimation occurring only at the genus level.
View Article and Find Full Text PDFAntibiotics (Basel)
November 2024
Laboratory of Microbiology, Nova Medical School, Universidade Nova de Lisboa, 1169-056 Lisboa, Portugal.
Background: species are the causative agent of Legionnaires' disease and, as ubiquitous waterborne bacteria, are prone to antimicrobial resistance gene (ARG) acquisition and dissemination due to the antimicrobial contamination of natural environments. Given the potential health risks associated with ARGs, it is crucial to assess their presence in the population.
Methods: The ARGs and were detected in 348 samples, isolates, and DNA extracts using conventional PCR.
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