Although Aedes species mosquitoes have been reported in Jaffna
for a long time, only a few cases of DF/DHF were reported until
2009. This might be due to the absence or low level of circulation of
DENV in Jaffna prior to the mass movement of people to the
peninsula following the end of conflict, despite the presence of
Aedes species mosquitoes. The establishment and spread of DENV
infections with the movement of people is a well documented
phenomenon in the expansion of DF/DHF in many regions of the
world.4,11 In the study area, poor reporting might have contributed
to the low number of cases until 2008 (n = 50). However, the
increase of >2000 cases in 2009/2010 cannot be explained by
delays in reporting. Conversely, even if we consider only the 458
(42.2% of the admitted cases with complete reports) cases reported
to the Epidemiology Unit of the Ministry of Health, this number is
still much higher than those reported prior to 2009.
Although Aedes species mosquitoes have been reported in Jaffnafor a long time, only a few cases of DF/DHF were reported until2009. This might be due to the absence or low level of circulation ofDENV in Jaffna prior to the mass movement of people to thepeninsula following the end of conflict, despite the presence ofAedes species mosquitoes. The establishment and spread of DENVinfections with the movement of people is a well documentedphenomenon in the expansion of DF/DHF in many regions of theworld.4,11 In the study area, poor reporting might have contributedto the low number of cases until 2008 (n = 50). However, theincrease of >2000 cases in 2009/2010 cannot be explained bydelays in reporting. Conversely, even if we consider only the 458(42.2% of the admitted cases with complete reports) cases reportedto the Epidemiology Unit of the Ministry of Health, this number isstill much higher than those reported prior to 2009.
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