The Health Ministry says fewer cases have been detected this month.
Oman has embarked on a campaign to eradicate the Egyptian zebra mosquito.
More than 11,000 people in Sudan’s Kassala have been infected by Chikungunya.
The Aedes aegypti mosquito, which spreads debilitating and potentially deadly viruses, from Zika and dengue to chikungunya, thrives in warmer climates than its malaria-carrying cousin.
In the first seven months of this year more than 109,000 cases of dengue infection have been reported in Sri Lanka.