Three West Nile Cases in Montrose: What To Know

When West Nile virus shows up in Colorado, it usually peaks during August and September. On the Western Slope, the city of Montrose is no stranger to the virus, with an outbreak that included 38 cases and 6 deaths as recently as 2022.

On August 24, Montrose County announced three new cases of the virus and encouraged residents to stay informed and prepared. Here are a few ways you can do just that.

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What is West Nile Virus, and What is Montrose County Doing About the Risk?

Three West Nile Cases in Montrose: What To Know

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Mosquitos spread West Nile virus. Most people have no idea they are infected, with only 20% developing symptoms and a mild illness. Less than 1% experience neurologic illness. Here in Montrose, our Public Health office is urging all of us to use repellent, wear protective clothing, and limit what you do outdoors when the blood-suckers are most active (dawn and dusk).  For areas of standing water within the city, mosquito dunks are available if water can’t be drained.

Why do August and September Matter, and are three cases a lot?

Montrose County Public Health says August and September are the most common months for West Nile virus cases, and while not unprecedented, they are noteworthy. Following the summer of 2022 that included 38 cases, Montrose reported only 2 cases in 2023. This makes three cases a reason to stay vigilant, and not necessarily a prediction of worse things to come.

Which Mosquito Repellents Actually Work?

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The CDC says to stick to effective repellents. While active ingredients may be a concern to some, DEET, picaridin, IR3535, oil of lemon eucalyptus, and repellents with para-menthane-diol are most effective in stopping mosquitos, and help slow the spread of West Nile. Any repellent should be used according to instructions. Montrose County specifically recommends the above-mentioned ingredients for residents trying to reduce their risk of mosquito bites.