Place | Year published | Study period | Dengue notified/seropositive | Weather variables studied | Correlation identified |
---|---|---|---|---|---|
Colombo, Ratnapura, and Anuradhapura districts [21] | 2013 | 2005–2011 | Notified dengue cases | Tmax, rainfall | Tmax. and rainfall did not affect dengue incidence (but there was a mild correlation between dengue and rainfall in two cities). |
Gampaha (it was one of the six Asian urban areas studied) [24] | 2012 | 2006–2009 | Seropositive dengue | Rainfall | A positive correlation was observed between the number of dengue cases and rainfall. |
Western province of Sri Lanka (Colombo, Kalutara, and Gampaha districts combined) [25] | 2009 | 2000–2004 | Notified dengue cases | Rainfall | Dengue incidence was relatively low during heavy rainfall and increased when rainfall started to decrease, showing a 3–4-week lag. Dengue was strongly correlated with rain in most of the studied towns. |
(No significant variations of temperature and humidity in were found, so they were not considered.) |