Research trends on Legionellosis

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TAHMAZ A., Oğuz Mızrakçı S., ALKAN S.

Journal of Clinical Medicine of Kazakhstan, vol.19, pp.29-32, 2022 (Peer-Reviewed Journal)


Aim: The aim of the study is to analyze the scientific studies about Legionellosis which published in all around the world. 
Material and methods: The Elsevier’s Scopus database ( was searched with the for bibliometric analysis method. Articles were selected only according to their valid scientific properties which accepted by scientific community with their methodologic design. The publications were analyzed according to publication years, countries, authors, institutions, funding institutions, publishing languages, themes, citations, keywords, methods, and samples. The Scopus database was filtered for document type which only the articles. The data containing the keywords “legionellosis” or “Legionella pneumophila” or “Legionella” or “Pontiac fever” in their title were retrieved till December 13, 2021.
Results: In total, 8778 documents relating to Legionellosis were identified in the Scopus database till December 13, 2021. 7073 of the documents were articles. The articles were published in mainly in the discipline of medicine (n=4766, 67.38%). The first articles were published in the year 1977 and was from United States of America (USA). There were two surges in the number of publications in the years 1983 and 2013. After 1980, the annual number of articles never dropped below 100 articles per year. The USA dominated the scientific production on Legionella with the number of 2214 (31.30%) publications. The top 5 leading scientifically productive countries on Legionella literature after USA were Germany (n=8.41%), United Kingdom (7.64%), France (7.36%) and Japan (n=512, 7.23%). The publications on Legionellosis were from more than 100 countries globally. The maximum number of the citation was in the year of 1978. 1126 (15.9%) of the articles were not cited yet.
Conclusion: The number of publications was high since the first reports were published, but the number of cites decreased since 2020.