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A Comparative Study of Human Leptospirosis between Mayotte and Reunion Islands Highlights Distinct Clinical and Microbial Features Arising from Distinct Inter-Island Bacterial Ecology.

Authors :
Desmoulin A
Rajaonarivelo A
Maillard O
Collet L
Jaffar-Bandjee MC
Moiton MP
Poubeau P
Fayeulle S
François-Wattrelot C
Blondé R
Tortosa P
Raffray L
Source :
The American journal of tropical medicine and hygiene [Am J Trop Med Hyg] 2024 Jul 02; Vol. 111 (2), pp. 237-245. Date of Electronic Publication: 2024 Jul 02 (Print Publication: 2024).
Publication Year :
2024

Abstract

Leptospirosis is a neglected zoonosis for which investigations assessing host-pathogen interaction are scarce. The aim of this study was to compare the severity and bacterial species involved in human cases of leptospirosis on Reunion and Mayotte islands, territories located in the southwest Indian Ocean that have recorded high human leptospirosis incidence but display fairly distinct epidemiological situations. A retrospective multicentric study including all patients over 18 years of age from Mayotte or Reunion with proven leptospirosis was conducted from January 2018 to April 2020. This study collected demographic, geographical, clinical, and biological data. Overall, 490 patients were included, 222 on Mayotte and 268 on Reunion. More patients were hospitalized on Reunion (n = 215, 80%) compared with Mayotte (n = 102, 46%). Severe disease was more common on Reunion (n = 75, 28%) than on Mayotte (n = 22, 10%). The dominant Leptospira species on Reunion was Leptospira interrogans (79%) followed by Leptospira borgpetersenii (21%), contrasting with the epidemiological situation on Mayotte where L. interrogans was found in only a minority of patients (10%). The high frequency of severe cases on Reunion could be explained not only by higher comorbidities but also by the higher occurrence of L. interrogans infections compared with Mayotte. Finally, the distribution of cases linked to L. borgpetersenii was found almost exclusively on the west coast of Reunion, raising the potential role of a ruminant reservoir.

Details

Language :
English
ISSN :
1476-1645
Volume :
111
Issue :
2
Database :
MEDLINE
Journal :
The American journal of tropical medicine and hygiene
Publication Type :
Academic Journal
Accession number :
38955193
Full Text :
https://doi.org/10.4269/ajtmh.23-0846