ArticlePloS one2021
The interrelationship between meteorological parameters and leptospirosis incidence in Hambantota district, Sri Lanka 2008-2017 and practical implications.
Article in PloS one, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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10 citing papers in PubMed, 21 citations in OpenAlex.
- Pathogenic Leptospira species identified in dogs and cats during neutering in Thailand.PLoS neglected tropical diseases · 2026Article
- Impact of El Nino Southern Oscillation and Climate Change on Infectious Diseases with Ophthalmic Manifestations.Tropical medicine and infectious disease · 2025Review
- Improving leptospirosis treatment through increased suspicion-"Leptospirosis calendar for general practitioners in Sri Lanka".BMC infectious diseases · 2025Article
- The Correlation Between Three Teleconnections and Dengue Incidence in the Western Province of Sri Lanka, 2005-2019.GeoHealth · 2025Article
- Geospatial Analysis of Abiotic and Biotic Conditions Associated with Leptospirosis in the Klaten Regency, Central Java, Indonesia.Tropical medicine and infectious disease · 2024Article
- Spatio-temporal modeling of human leptospirosis prevalence using the maximum entropy model.BMC public health · 2023Article
- Spatial-temporal patterns and risk factors for human leptospirosis in Thailand, 2012-2018.Scientific reports · 2022Article
- SARIMA and ARDL models for predicting leptospirosis in Anuradhapura district Sri Lanka.PloS one · 2022Article
- The correlation between three teleconnections and leptospirosis incidence in the Kandy District, Sri Lanka, 2004-2019.Tropical medicine and health · 2021Article
- Time series models for prediction of leptospirosis in different climate zones in Sri Lanka.PloS one · 2021Article
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Authors and funding
3 authors at 2 institutions in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
backgroundLeptospirosis is a bacterial zoonosis. Leptospirosis incidence (LI) in Sri Lanka is high. Infected animals pass leptospires to the environment with their urine. Leprospires' survival in the environment to infect a new host depends on meteorological factors. El Nino Southern Oscillation (ENSO) and Indian Ocean Dipole (IOD) modulate the weather in Sri Lanka.
objectivesThe determination of interrelationship between the LI in the Hambantota District, and local meteorological parameters, ENSO and IOD.
methodsWe acquired notified leptospirosis cases in the Hambantota District and population data. We calculated weekly leptospirosis incidences for 2008 to 2017.Weather data from two weather stations was obtained, averaged and converted into weekly data. We plotted time series graphs and observed the correlation between seven aggregated weather parameters and LI. We estimated cross-correlations between those weather parameters and LI. As our principal analysis we determined correlation between LI and seven local weather parameters, Nino 3.4, Nino4 and Dipole Mode Index (DMI) indices using wavelet analysis.
resultsOur wavelet analysis results showed troughs of minimum, maximum, mean temperatures, soil temperature, the evaporation rate, the duration of sunshine were followed by peaks in LI and peaks of rainfall followed by peaks of LI, all after lag periods. Our time series graphs and cross-correlation determination results are generally in agreement with these results. However there was no significant correlation between rainfall and LI in the cross-correlation analysis. There were peaks of LI following both peaks and troughs of DMI. There was no clear correlation between both Nino indices and LI. DISCUSSION: This may be the first long-term study demonstrating soil temperature, evaporation rate and IOD are correlating with LI. The correlation pattern of LI with temperature parameters differs from similar past studies and we explain the reasons. We propose ways to control high LI we observed after periods of weather favorable for transmission of leptospirosis.
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