Health Ministry-Sri Lanka

Dengue is an important vector-borne disease in Sri Lanka. First serologically confirmed case was reported in 1962 and the first documented dengue outbreak occurred in 1965- 1966, with few sporadic cases of haemorrhagic disease. According to the studies conducted at Medical Research Institute, there had being continued dengue transmission in 1970s and 1980s with periodic epidemics, without significant numbers of dengue haemorrhagic fever and dengue shock syndrome.  
These studies showed that during 1980 and 1985, 14% to 24% of viral syndrome cases being caused by dengue infection and all four dengue serotypes were circulated with the predominance of DEN- 2 and DEN- 3.
Sri Lanka experienced first epidemic of Dengue Haemorrhagic fever / Dengue Shock Syndrome caused by DEN- 3 sero type in 1989 – 1990. It has been suggested that a genetic change occurred in the DEN -3 virus increasing its epidemic potential/virulence may have contributed to emergence of DHF/DSS after many years of its circulation. Since then progressively larger epidemics with more severe and fatal DHF/DSS have occurred at regular intervals.

DF/DHF became a notifiable disease since 1996 in Sri Lanka.

Following are the number of cases reported since 2002.

Trend and Case fatality ratio Upto 2012

Temporal Spread   

Seasonality upto 2012

 Incidence   

2013

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2012

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2011

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