Surge in Dengue Cases: 500 Infections Documented in Just Six Months!
Dengue fever is a growing concern in Iran, with health authorities reporting significant cases this year. From March 21 to September 27, 497 instances of dengue fever were confirmed across the country, highlighting an urgent need for awareness and preventive measures.
According to the health ministry, Chabahar has recorded the highest number of infections, totaling 445 cases, including 25 travel-associated instances of dengue fever contracted in Pakistan. Other affected areas include:
- Bandar Abbas: 43 cases (2 travel-associated from Pakistan)
- Zahedan: 2 cases
- Iranshahr: 2 cases
- Tehran: 1 case
- Birjand: 1 case
Dengue is a viral disease transmitted to humans primarily through the bites of infected mosquitoes, specifically Aedes aegypti and Aedes albopictus. These species are also responsible for spreading other viral infections, including Zika and Chikungunya. Mosquitoes require minimal water to reproduce, making common containers like:
- Bowls
- Cups
- Fountains
- Tires
- Barrels
- Vases
ideal breeding grounds. The dengue disease progresses through various phases, such as:
- Fever phase
- Critical phase
- Recovery phase
The Aedes aegypti mosquito, which is more invasive and prevalent in Iran, poses a significant risk. Health officials recommend that residents in affected areas wear protective clothing that covers most of the body during the early morning and late evening when mosquitoes are most active.
Transmission of dengue can occur two days before symptoms appear and continues for two days after fever onset. The disease can spread through various means:
- From mosquitoes to humans
- From humans to mosquitoes
- Through blood transfusions
- Organ transplants
- From mother to child during pregnancy
The lifespan of the Aedes mosquito ranges from one to four weeks, during which they require blood meals every one to two hours, resulting in approximately 40 to 50 meals throughout their life. Interestingly, around 40% to 80% of dengue patients exhibit mild or no symptoms, complicating detection efforts.
Adhering to proper sanitation practices can significantly reduce the incidence of dengue fever by up to 70%. The Aedes aegypti mosquito was first identified in Hormozgan province in 2019 and has since spread to several provinces, including:
- Hormozgan
- Sistan-Baluchestan (Chabahar and Konarak)
- Bushehr
- Fars
The Aedes albopictus species has been observed in the northern and north-western provinces such as Gilan, Mazandaran, Ardabil, East Azerbaijan, and Zanjan. According to the World Health Organization (WHO), approximately half of the global population is now at risk of dengue, with an estimated 100 to 400 million infections reported annually.
Preventing and controlling dengue fever relies heavily on effective vector control. Currently, there is no specific treatment for dengue or severe dengue cases. However, early detection and access to appropriate medical care can significantly reduce the fatality rates associated with severe dengue infections.
To help prevent dengue fever, individuals are advised to:
- Wear long-sleeved clothing and long pants
- Use insect repellent, especially when traveling to high-risk provinces, predominantly in the south
By taking these precautions, individuals can help mitigate the risks associated with dengue fever and contribute to public health efforts in Iran.
