Modified Aedes aegypti mosquitoes are released in the Colombian city of Cali in June
The Aedes aegypti, more commonly known as the yellow fever mosquito, has been identified in Mesa County for the first time.
According to the Centers for Disease Control and Prevention, Aedes aegypti typically live in tropical, subtropical and temperate climates, and they are known to transmit viruses including Zika, yellow fever, dengue and chikungunya.
None of those qualities is true for the more than 100 eggs and at least five adults of the species found in Grand Junction’s semi-arid climate.
Mesa County Public Health Epidemiologist Kathleen Satterfield said the species’ reputation for transmitting tropical viruses doesn’t necessarily mean this local species will do the same.
“No cases of the diseases that can be associated with this species of mosquito have been reported in Mesa County,” Satterfield said. “If there is ever a concern about cases, we will notify the community.”
The Grand River Mosquito Control District, which monitors, prevents and exterminates mosquitoes in the surrounding region, reported the county’s population of Aedes aegypti has only been discovered in traps within the Orchard Mesa area.
This species has several unique characteristics: they are most active during the daytime; they only fly an average of 50 feet in a lifetime, whereas most species will travel one to three miles over their lifespan; they can be identified by black and white markings on their legs.
GRMCD District Manager Tim Moore said his team is actively treating (exterminating) larvae and fogging adult mosquitoes in the area; they will continue until the number of mosquitoes, Aedes aegypti especially, subsides.
According to Mesa County Public Health, its team will coordinate with the GRMCD while continuing to monitor and respond to any abnormal disease patterns and trends.
“We have a strong public health system here in Mesa County — we are prepared and ready to respond to whatever health challenges may arise,” Satterfield said.
