What is the 'yellow fever mosquito'?

The Aedes aegypti mosquito, an invasive species originally from Africa, is nicknamed the 'yellow fever mosquito' because of its ability to spread dangerous diseases like yellow fever, dengue, and Zika.

Where has the 'yellow fever mosquito' been spotted?

As of September 2025, the Aedes aegypti mosquito has been detected in the U.S. state of Idaho for the first time, expanding its range from the southern and southwestern parts of the country.

How can people protect themselves from the 'yellow fever mosquito'?

To avoid mosquito bites and reduce the risk of contracting diseases, experts recommend using insect repellent, wearing long clothing, eliminating standing water, and taking other preventive measures when spending time outdoors.

Home / Health / Invasive 'Yellow Fever Mosquito' Reaches Idaho, Sparking Disease Fears

Invasive 'Yellow Fever Mosquito' Reaches Idaho, Sparking Disease Fears

17 Nov

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Summary

Aedes aegypti mosquito, known as 'yellow fever mosquito', spotted in Idaho for the first time in September 2025
This invasive mosquito species can spread dangerous diseases like dengue, yellow fever, and Zika
Experts advise taking precautions like using repellent and eliminating standing water to avoid mosquito bites

Invasive 'Yellow Fever Mosquito' Reaches Idaho, Sparking Disease Fears

As of November 17th, 2025, the invasive Aedes aegypti mosquito, also known as the 'yellow fever mosquito', has been detected in the state of Idaho for the first time. This aggressive mosquito species, originally from Africa but now found in tropical and subtropical regions worldwide, is capable of spreading several dangerous diseases, including dengue, yellow fever, and Zika.

The Aedes aegypti mosquito was already present in the southern and southwestern United States, but it has been slowly expanding its range. Its arrival in Idaho last September is a concerning development, as these mosquitoes prefer to feed on humans and will bite repeatedly. Coupled with their ability to transmit deadly diseases, the spread of the yellow fever mosquito underscores the need for people spending time outdoors to take precautions.