Weld County officials announced on July 7 that mosquito samples collected from two of the county’s three designated trap zones have tested positive for West Nile Virus (WNV). The affected areas include Greeley, Evans, Kersey, and LaSalle (Zone One), as well as Johnstown, Milliken, and Platteville (Zone Two).

Mosquitoes from the third trap zone—covering Firestone, Dacono, and Fort Lupton—tested negative for the virus.

Though no human cases have been reported in the county so far this year, health officials are warning residents to be prepared. With the arrival of hotter temperatures in July and August, Culex mosquitoes—the primary carriers of WNV—become more active and more numerous.

“A Permanent Summer Presence”

Jason Chessher, Executive Director of the Weld County Health Department, emphasized the seasonal nature of the virus. “The increasing hot weather often leads to favorable conditions for the Culex mosquito that carries West Nile Virus,” he said. “The public needs to be vigilant, because West Nile Virus has a permanent summer presence in Colorado.”

What Are The Risks?

Most people infected with WNV do not show symptoms, but those who do may begin to feel unwell three to 14 days after being bitten by an infected mosquito. Common symptoms include fever, headache, muscle aches, nausea, vomiting, weakness, and sometimes a rash.

While these symptoms may resemble the flu, WNV can lead to more serious complications in some cases, particularly among older adults and those with weakened immune systems. There is currently no vaccine or specific antiviral treatment for WNV, which makes prevention especially important. Weld County health authorities recommend seeking medical care promptly if any symptoms arise.

Steps to Stay Safe

Health experts advise residents to take proactive steps to reduce the risk of mosquito bites and virus transmission. These include:

• Eliminate standing water around your home, such as in birdbaths, flower pots, gutters, or pet bowls, as these are prime mosquito breeding grounds.

• Use insect repellent that contains DEET, picaridin, oil of lemon eucalyptus, IR3535, or para-menthane-diol.

• Avoid outdoor activity during dawn and dusk, when mosquitoes are most active.

• Wear protective clothing like long-sleeved shirts and pants if you are outside during these peak hours.

Cases In The Past and Present

Colorado saw a significant spike in WNV cases in 2023, recording 631 infections, 398 hospitalizations, and 51 deaths—the highest in the country that year. In contrast, 2024 has been comparatively mild, with just 76 reported cases statewide, 24 hospitalizations, and no fatalities to date.

Still, with Culex mosquito populations on the rise, officials say it’s crucial not to let your guard down. Weld County will continue monitoring mosquito activity closely and urges the community to follow safety guidelines to help prevent the spread of West Nile Virus this summer.

In Northeast Ohio, late summer usually means backyard cookouts, packed ballfields, and sticky, humid nights. This year, though, it has brought something less welcome: a rise in mosquito bites, and a rise in West Nile virus (WNV) cases.

Local health departments reported that two residents, one in Medina County and another in Cuyahoga County, tested positive for West Nile virus in August, according to Ideastream Public Media. Data from the Ohio Department of Health showed six confirmed cases statewide as of August 21.

Nationwide, the numbers tell a bigger story. According to the Centers for Disease Control and Prevention (CDC), there have been at least 771 human cases reported across 39 states as of September 9. Alarmingly, 490 of those cases were neuroinvasive, meaning they affected the brain or spinal cord, and were potentially life-threatening.

West Nile Virus: The Most Common Mosquito-Borne Illness

West Nile virus remains the most common mosquito-borne illness in the continental United States, according to Vector Disease Control International. Most infected people never develop symptoms, but those who do may experience fever, body aches, nausea, vomiting, or a rash.

In about 1 in 150 cases, the virus causes brain inflammation or meningitis, which can be deadly.

Older adults and immunocompromised individuals face the highest risk of severe complications. “Protecting yourself is especially important for people who are more at risk,” CBS News chief medical correspondent Dr. Jon LaPook emphasized, urging the public to use repellent, wear long sleeves, and drain standing water near their homes.

Also Read: West Nile Virus Spotted In Weld County Mosquitoes, Here’s What You Need To Know

Why This Outbreak Is Concerning

This year’s surge is not random. Mosquitoes thrive in warm, wet conditions. Longer, hotter summers and heavier rainfall, both linked to climate change, mean longer breeding seasons and more stagnant pools where larvae grow.

"It's always worse in the summer because that's when the mosquito population is at its highest," said Dr. Amy Edwards, an infectious disease specialist at University Hospitals in Cleveland, as reported in The Cool Down. She added that Ohioans face a very different risk today than a generation ago: “For people who grew up in Ohio, mosquitoes and ticks didn't used to carry disease here. Across the U.S., the rate of mosquito-borne illness is going up.”

The trend isn’t limited to West Nile. Lyme disease has been spreading to areas previously considered too cold for ticks, and dengue fever has reemerged in Florida, all signs of vector-borne diseases finding new footholds.

Also Read: Parkinson’s Mystery Cracked? Study Finds Brain Cells May Be Burning Themselves Out

Season Isn’t Over Yet

Public health officials stress that the danger is far from gone. “Infections can continue to occur until the first hard frost of the season, which is likely still many weeks away,” said Dr. Robbie Goldstein, Massachusetts’ public health commissioner, in a recent advisory. He urged people to remain vigilant, as mosquito activity remains high through early fall

The CDC updates its case counts biweekly through ArboNET, a national arboviral surveillance system. The agency notes that symptoms can take between two to fourteen days to appear after a mosquito bite, and in people with weaker immune systems, it can take even longer.

Prevention Remains the Best Defense

There is currently no specific treatment for West Nile virus. For most, recovery involves managing symptoms such as fever and fatigue. Severe cases may require hospitalization for intravenous fluids or even respiratory support.

Health experts recommend taking steps to minimize mosquito exposure:

• Use EPA-registered insect repellent containing DEET, picaridin, or oil of lemon eucalyptus.
• Wear long-sleeved shirts and pants, especially during dawn and dusk when mosquitoes are most active.
• Eliminate standing water in flowerpots, gutters, and other outdoor containers.
• Ensure window and door screens are intact to keep mosquitoes out.

West Nile Virus In The US

West Nile virus, first detected in the U.S. in 1999, is now a recurring part of late summer and early fall. Its growing prevalence serves as a warning of how climate change, urbanization, and changing ecosystems can amplify public health threats.

As the season continues, experts urge residents to stay proactive rather than complacent. The mosquito buzzing around your backyard may be more than an annoyance, it could be carrying a virus that has sickened hundreds this year and shows no sign of stopping.

A new study published in eLife has shed light on why dopamine-producing neurons, the brain cells crucial for motor control, die off in Parkinson’s disease. Researchers from the Gladstone Institute for Neurological Disease in the US found that these neurons may essentially be burning themselves out due to overactivity, potentially triggering or accelerating the condition.

Neurons Working Overtime

Parkinson’s disease is marked by the progressive death of dopamine-producing neurons in the substantia nigra, the part of the brain that controls movement. Building on earlier research in animal models, the Gladstone team explored whether the surviving neurons overcompensate for lost cells by becoming hyperactive, ultimately causing damage to themselves.

To test this theory, scientists used genetically modified mice and stimulated their dopamine neurons with drugs for several days. The result: the neurons gradually degenerated and died, particularly in the substantia nigra, mirroring what happens in human Parkinson’s patients.

“An overarching question in the Parkinson’s research field has been why the cells that are most vulnerable to the disease die,” says neuroscientist Ken Nakamura from the Gladstone Institute. “Answering that question could help us understand why the disease occurs and point toward new ways to treat it.”

Calcium Changes and Gene Shifts

The study went a step further by examining changes inside these overworked neurons. Researchers found alterations in calcium levels and shifts in the expression of genes involved in dopamine metabolism and calcium regulation. These findings were mirrored in brain samples from people with early-stage Parkinson’s disease, suggesting that the mechanism seen in mice is relevant to humans.

“In response to chronic activation, we think the neurons may try to avoid excessive dopamine, which can be toxic, by decreasing the amount of dopamine they produce,” explains neuroscientist Katerina Rademacher, lead author of the study. “Over time, the neurons die, eventually leading to insufficient dopamine levels in the brain areas that support movement.”

A Vicious Cycle

The research suggests a troubling cycle: as some neurons die, the remaining ones become even more active to compensate, which may in turn accelerate their demise. This process is similar to lightbulbs burning too brightly and eventually blowing out.

Scientists have long debated why these vulnerable cells die, with previous theories focusing on faulty mitochondria, toxic protein clumps, and genetic mutations. This new study adds another potential cause to the list, overactivity itself.

Hope for Future Therapies

If confirmed in further studies, this discovery could open the door to new therapies. Adjusting the firing patterns of dopamine neurons with medication or deep brain stimulation might help prevent them from overworking and prolong their survival.

“It raises the exciting possibility that adjusting the activity patterns of vulnerable neurons could help protect them and slow disease progression,” Nakamura notes.

The findings represent a step forward in understanding Parkinson’s disease, offering fresh clues for researchers seeking ways to halt or slow its devastating impact.

Every second counts in an emergency, and World First Aid Day serves as a timely reminder of the critical role first aid plays in saving lives. Observed annually on the second Saturday of September, this day aims to raise awareness about first aid, encourage training, and empower individuals to respond effectively during crises. In 2025, the day will be observed on September 13th, uniting communities worldwide in their commitment to safety and preparedness.

World First Aid Day 2025 Theme

This year’s theme is “First Aid and Climate Change,” highlighting the need for emergency preparedness in the face of increasingly frequent climate-related disasters. Rising global temperatures, floods, wildfires, and storms are creating new challenges for communities, making first aid knowledge more crucial than ever. The theme underscores that basic first aid is not just for personal emergencies but is essential in building community resilience in a changing world.

Importance of First Aid

First aid can make the difference between life and death in the crucial minutes before professional medical help arrives. Whether it’s cardiac arrest, choking, severe bleeding, or burns, timely action can significantly improve survival chances and recovery outcomes. Equipping individuals with basic first aid skills fosters a culture of preparedness, at home, in workplaces, and in public spaces.

In addition to preventing complications and reducing injury severity, first aid training empowers people to act confidently in emergencies. From performing CPR to controlling bleeding and handling choking incidents, these life-saving skills can transform bystanders into first responders.

Origin and Historical Relevance

The roots of first aid go back to the 19th century when Henry Dunant, founder of the Red Cross, witnessed the suffering of injured soldiers during the Battle of Solferino. This inspired a humanitarian movement to care for the wounded without discrimination. The term “first aid” was later coined by German surgeon Friedrich von Esmarch in the late 1800s.

World First Aid Day was first observed in 2000 by the International Federation of Red Cross and Red Crescent Societies (IFRC) to promote global first aid education. Today, millions of people participate in awareness events, training workshops, and community demonstrations, spreading the message that first aid is a universal skill everyone should learn.

How to Participate

Individuals can get involved by attending first aid training courses, sharing educational resources on social media, organizing community workshops, or volunteering with local Red Cross and Red Crescent societies. Even downloading a first aid mobile app can be a step toward being prepared.

A Step Toward Safer Communities

World First Aid Day 2025 is more than a date on the calendar, it’s a call to action. By learning first aid, we can build safer, more resilient communities ready to face emergencies, including those amplified by climate change. This September 13th, take the time to learn, teach, and spread awareness. You might just save a life.