Wet Summer Leads to Record West Nile Infections in Arizona

Arizonans enjoyed a cooler and wetter summer in 2021 but so did mosquitos, which caused West Nile virus infections at rates multiple times higher than previous years.

As of Dec. 23, the Arizona Department of Health Services recorded 1,567 known or probable cases of the virus. The agency attributes 99 deaths to the virus. 

By contrast, 2020’s dry summer saw 11 total cases and two deaths, one of the lowest years of transmission since the virus was first discovered in 2003. The only year Arizona recorded more cases was in 2004, when the state had 391 cases.

Read More

Four More Arizonans Die from West Nile; Hospitals See ‘Fairly Significant’ Amount of Patients

close-up of a mosquito

Public health authorities announced Friday four more Arizonans have died from complications of the West Nile Virus.

The Arizona Department of Health Services updated its data on West Nile Virus instances Friday, showing the new death total for the summer and fall mosquito season has risen to 14. ADHS also increased the state’s probable and confirmed West Nile Virus case count to 256.

Maricopa County is home to the majority of cases. ADHS data shows 207 of the 256 confirmed and probable cases originated in the state’s most populous county. Neighboring Pinal County has had 34 confirmed or probable cases.

Read More