Despite warmer weather approaching, mosquito season in Southern California is expected to be less intense this year due to drought conditions reducing stagnant water where mosquitoes breed.
A 71-year-old Denver resident has died from West Nile virus, bringing the total number of deaths in Colorado to 11 this year. The Colorado Department of Public Health and Environment has reported 103 cases of West Nile virus, with 60 people hospitalized. The department is urging residents to take precautions to protect themselves from mosquito bites, as the mosquito season has been particularly bad in Colorado. It is unclear if cases have peaked or if they will continue to rise. Precautions include preventing mosquitoes from laying eggs, using insect repellents, avoiding outdoor activity from dusk until dawn, wearing protective clothing, and using screens on windows and doors.
Mosquitos are most active in the early morning and early evening hours, preferring cooler temperatures and seeking moisture and shade. They are less active during the middle of the day when it is hotter and daylight can be deadly for them. To protect yourself from mosquito bites, use bug spray, citronella oil or candles, and avoid areas with standing water. Additionally, avoid spending time outdoors in the early mornings or evenings if you want to minimize mosquito encounters.
Mosquitoes are attracted to certain individuals based on factors such as blood type, body scent, metabolism, clothing choices, and even drink selection. Mosquito season in Florida started earlier this year, and the extreme heat and rain are contributing to higher mosquito levels. While most mosquito bites are annoying rather than harmful, some species can transmit diseases like chikungunya, dengue, Zika, and West Nile viruses. Recently, cases of malaria were reported in Florida, but they are localized and not associated with fatal disease. Experts recommend using traditional repellents with ingredients like DEET, Picaridin, and IR 3535, as well as fans to deter mosquitoes. Researchers are studying individuals who attract mosquitoes to develop methods to reduce their attractiveness to these insects.
Multnomah County officials warn that Portland's unseasonably warm spring has caused "floodwater" mosquitoes to develop at a rapid pace, making this one of the worst mosquito seasons to date. While these mosquitoes are primarily "nuisance mosquitoes" that don't spread viruses, residents are advised to exercise caution at sunrise or sunset when they are most active and to wear long sleeves, long pants, and personal repellents. The county is also using larvicides to treat mosquitoes in uninhabited areas and encourages individuals to regularly dump out man-made water containers in their backyards to disrupt the "container-breeding mosquito" life cycle.