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World Mosquito Day: Which Mosquito Spreads Which Disease?

World Mosquito Day: Which Mosquito Spreads Which Disease?
World Mosquito Day 2026: Which Mosquito Spreads Which Disease? · NDTV

There are many kinds of mosquitoes, and they do not all spread the same illnesses.

Aedes mosquitoes can spread dengue and chikungunya and usually bite during the day.

Anopheles mosquitoes can spread malaria and usually bite at night.

Culex mosquitoes can spread Japanese encephalitis and lymphatic filariasis, mostly in the evening and at night.

A mosquito must first become infected before it can pass a disease to someone else.

A mosquito bite alone cannot tell you which species bit you or whether it carried a pathogen.

Removing standing water helps stop mosquitoes from growing near homes.

Repellent, long clothing, window screens and mosquito nets can provide additional protection.

World Mosquito Day on August 20 remembers Sir Ronald Ross’s discovery that mosquitoes transmit malaria.

Key facts

World Mosquito Day
Observed annually on August 20.
Aedes aegypti
Major vector of dengue and chikungunya; primarily a daytime biter.
Anopheles species
Transmit malaria, a disease caused by Plasmodium parasites; mainly bite at night.
Culex species
Can transmit Japanese encephalitis and lymphatic filariasis; generally active in the evening and at night.
Malaria discovery
Sir Ronald Ross demonstrated in 1897 that mosquitoes transmit malaria.
Dengue estimate
The World Health Organization estimates 100–400 million dengue infections occur globally each year.
Prevention
Recommended measures include removing stagnant water, covering stored water, using repellents, wearing protective clothing, using screens and sleeping under mosquito nets.

Sources

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