Maricopa County Records First West Nile Virus Fatality of the Year
The Maricopa County Department of Public Health (MCDPH) has announced the season’s first fatality linked to West Nile virus. The deceased was an elderly individual who had pre-existing health issues.
“This case is a tragic reminder that West Nile virus can cause severe illness and even death,” stated Melissa Kretschmer, the epidemiology supervisor for the Vector-Borne and Zoonotic Diseases program at MCDPH. “As mosquito activity increases across Maricopa County, we encourage residents to take prevention seriously by using insect repellent, eliminating standing water around their homes, and protecting themselves from mosquito bites whenever they spend time outdoors.”
West Nile virus is primarily transmitted through the bite of an infected mosquito. Although most people do not exhibit symptoms, around 20% of those infected may experience flu-like symptoms, including fever, headache, and body aches. In rare instances, around 1 in 150 cases, the virus can lead to severe conditions such as encephalitis or meningitis, potentially causing paralysis, long-term disability, or death. Those at greatest risk include older adults, individuals with underlying health conditions, and those with compromised immune systems.
So far this year, Maricopa County has confirmed 17 human cases of West Nile virus, a significant increase from the four cases reported during the same timeframe last year.
MCDPH collaborates with healthcare providers, the Maricopa County Environmental Services Department (MCESD), and state and federal partners to maintain robust surveillance of both human and mosquito populations and to implement preventive measures. MCESD operates an ongoing and vigorous mosquito surveillance and abatement program.
Kretschmer emphasized the importance of eliminating mosquito breeding grounds, stating, “Even an overturned bottle cap can hold enough water for mosquitoes to breed. It’s important that we remove these breeding sources that can form after rain or watering plants.”
Public health officials are urging residents and visitors to adhere to the 4Rs (Repel, Remove, Repair, Remind) to combat mosquito-borne diseases:
- Repel: Use EPA-registered insect repellents (e.g., those containing DEET) when outdoors.
- Remove: Eliminate standing water around your home and yard to prevent mosquito breeding.
- Repair: Fix or replace damaged window and door screens.
- Remind: Inform friends, family, and neighbors about these safety measures.
The community is encouraged to focus on mosquito control and prevention during National Mosquito Awareness Week, June 21-27. For more details on mosquito-borne illnesses in Maricopa County, visit maricopa.gov/FightTheBite or maricopa.gov/NoSeDejePicar.
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Media contact: Sonia Singh, Sonia.singh@maricopa.gov, 602-679-3098
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