Dengue fever appears to be reemerging in the country as the number of people infected with the mosquito-borne disease rose sharply this month.

Since February, there has been a significant decrease in the number of cases till September compared to last year, but the number of patients admitted to hospital increased mostly in November -- the month when the number of dengue cases usually drops.

Last month, 163 dengue cases were reported in the capital and elsewhere. Whereas, the number stood at 165 in the first 11 days of this month, according to the control room Directorate General of Health Services.

There were around 47 dengue patients recorded in September and 68 in August.

From March to the next five months, the number was less than 30 each month, while the first two months of this year saw 199 and 45 cases respectively.

A total of 792 patients were admitted to public and private hospitals from January till yesterday, while some 698 of them had recovered and been released.

The Institute of Epidemiology, Disease Control and Research (IEDCR) found one out of five suspected deaths caused by dengue, said DGHS data.

Experts say the dengue season's longevity is increasing and it is not a seasonal virus anymore.

The dengue issue is critical as the country has reported having more than one lakh cases of the disease last year. Mosquito species like Aedes Aegypti Albopictus transmit the dengue virus into humans through bites.

Most  cases in the country are reported in June due to monsoon, high temperature and humidity. The World Health Organisation says dengue outbreaks can occur any time that mosquitoes are active.

High temperature and humidity favour the insect's survival, increasing the likelihood of transmission.