West Nile Fever: The Silent Threat from Mosquitoes That We Shouldn't Underestimate

04.08.2025 | Medicine

Experts from the National Center for Infectious Diseases warn about the risks of West Nile fever, which can be asymptomatic but poses dangers for older people.

Снимка от Alvesgaspar, Wikimedia Commons, под CC BY-SA 3.0

West Nile fever is becoming a serious public health challenge, with 80% of infected individuals experiencing the disease without noticeable symptoms. This was revealed to the media by a leading epidemiologist from the National Center for Infectious and Parasitic Diseases (NCIPD).

Prof. Iva Hristova, head of the center, emphasized the critical aspects of the disease. In 20% of cases, a short-term fever period lasting one to three days is observed, accompanied by muscle and joint pain.

The main vector of transmission is mosquitoes, which necessitates the application of preventive measures. The expert recommends using repellents, insecticide devices, and avoiding areas with high mosquito activity, especially during their peak.

Medical specialists warn that patients most often seek medical help when complications affecting the central nervous system occur. Elderly people are identified as the highest-risk group for severe disease progression.

According to the official epidemiological report, at the end of July, a single case was registered in Sofia - a 55-year-old man who was discharged in stable condition. The patient had multiple mosquito bites without having left the country.

Geographical statistics show the most registered cases in neighboring countries such as Italy, Greece, Serbia, and Romania. Prof. Hristova described Bulgaria as an "island of tranquility" but emphasized the need for continuous monitoring, especially during August and September.

Despite the relatively low risk, health authorities call for increased attention and adherence to anti-mosquito recommendations to prevent the spread of the disease.