Tiny Bites, Big Threats: 7 Deadly Diseases Caused by Mosquitoes!

• Written by Sejal Singhania

  Reviewed by Munmi Sharma

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If you’ve been keeping up with recent health news, you might have seen headlines like “dengue fever cases rising” or “mosquito-borne Chikungunya virus” popping up all over online. Whether you're wandering the busy streets of Delhi or unwinding on stunning tropical islands, mosquitoes pose a serious threat to human life by transmitting diseases. 

These small creatures are responsible for spreading some of the world's most serious diseases, affecting millions of people each year. In India, after every monsoon, diseases like malaria, dengue, chikungunya, and Zika seem to return. But why does this happen, and what can you do to protect yourself?

Let’s review the deadliest mosquito diseases, their symptoms, prevention methods, and financial preparedness for potential medical emergencies.

Meet the Mosquito: The World’s Deadliest Creature

Did you know that these tiny creatures, mosquitoes, are responsible for over 17% of all infectious diseases and cause more than 700,000 deaths each year ? These mosquitoes carry parasites, bacteria, or viruses. It's truly astonishing how mosquitoes are responsible for spreading more diseases than any other creature on Earth. It's a reminder of how important it is to protect ourselves from bites and stay vigilant.

How the Mosquito Spreads Diseases? 

When a mosquito bites someone who is infected with a virus or parasite, it collects that germ. Later, when it bites another person, it can transmit the infection through its saliva. This process is what doctors refer to as vector-borne disease, in which the mosquito acts as the “vector” that carries and spreads the infection.

When are Mosquitoes Most Active?

Before exploring the major diseases they can transmit through mosquitoes, let’s first understand when mosquitoes are most active and likely to bite.

• Aedes mosquitoes (which spread dengue, Zika, and chikungunya) bite during the day.
• Anopheles mosquitoes (which spread malaria) are primarily active at night.
• Culex mosquitoes (which spread West Nile virus) bite during dusk and dawn.

What are the Symptoms of Mosquito-Borne Disease?

Symptoms of mosquito-borne diseases often start with general signs that resemble those of common viral infections. However, the specific symptoms can differ based on the disease type and the body's response. Common mosquito disease symptoms include:

• Fever
• Headache
• Muscle and joint pain
• Nausea and vomiting
• Skin rash
• Fatigue
• Swollen lymph nodes
• Chills and sweating
• Neurological signs: such as confusion, seizures, or neck stiffness.

7 Mosquito-borne Diseases That Can Be Deadly! 

Mosquitoes seem small, but their impact is profound. Let’s take a moment to look at the dangerous diseases that just one mosquito bite can spread, along with their symptoms, so we can better protect ourselves and our loved ones.

Malaria

Malaria is caused by parasites transmitted through the bites of infected Anopheles mosquitoes. It is among the oldest and most common mosquito diseases known to humans. 

Symptoms of Malaria

• Fever with intense shivering
• Chills or sweats
• Headache
• Muscle pain
• Nausea and vomiting, and
• Fatigue

Prevention Tip

Remember to use mosquito nets when sleeping and keep stagnant water away from your home to prevent breeding. If travelling to malaria-prone areas, take the recommended medication. Staying proactive keeps you safe and comfortable.

Dengue Fever

Dengue is primarily transmitted by the Aedes aegypti mosquito, which usually bites during daylight hours. Some individuals with dengue may experience complications such as internal bleeding, shock, and even death. Severe cases of dengue require close hospital monitoring.

Symptoms of Dengue

• High fever,
• Severe headache,
• Pain behind the eyes,
• Persistent joint and muscle pain,
• Muscle fatigue,
• Nausea and vomiting, and
• Skin rash.

Prevention Tip

Be sure to empty flower pots, coolers, and tanks each week. Don't forget to use mosquito repellents during the daytime as well, to keep your outdoor space comfortable and safe.

Zika Virus

Zika fever, also called Zika virus disease or Zika, is a disease transmitted by Aedes mosquitoes. Women infected with Zika during pregnancy may have children with severe health issues, such as microcephaly, leading to lifelong disabilities. That's why the Zika virus is a genuine concern in areas where it's spreading quickly.

Symptoms of Zika Virus

• Persistent fever
• Rashes
• Headache
• Joint and muscle pain, and
• Conjunctivitis or eye flu.

Prevention Tip

To prevent mosquito bites during pregnancy, use protective screens or nets around yourself. These easy precautions can help ensure your safety and comfort.

Chikungunya

Chikungunya is a viral disease spread to people through infected Aedes aegypti mosquitoes, the same mosquitoes that also carry dengue. It can significantly impact daily life, especially when joint discomfort persists, which can be more challenging for older adults or anyone with existing health conditions. Since it shares symptoms with Zika and dengue, there's a risk of misdiagnosis, especially in areas where these diseases are widespread.

Symptoms of Chikungunya

• Fever,
• Often severe joint pain,
• headache,
• Muscle pain at joints with swelling, and
• Rashes

Prevention Tip

Wear full-sleeved clothes and use repellents during the day to stay comfortable and protected.

Yellow Fever

Yellow fever is a viral hemorrhagic disease transmitted by Aedes mosquitoes. It affects 47 countries, with 13 in the Americas facing the highest risk of outbreaks, including Brazil, Mexico, and Colombia. The name 'yellow' refers to the jaundice that some patients experience. According to a recent report by the World Mosquito Program , over 30,000 people lose their lives to this disease every year worldwide.

Symptoms of Yellow Fever

• Fever and headache
• Muscle pain and nausea
• Jaundice (yellow skin/eyes)
• In severe cases, bleeding

Prevention Tip

A vaccine is now available and required for travel to some countries, making it easier for you to stay safe and enjoy your adventures.

West Nile Virus

West Nile virus is transmitted by Culex mosquitoes, which are single-stranded RNA viruses belonging to the Flavivirus genus. They can be found in the blood of some infected birds. The virus mainly reaches humans through the bite of infected Culex mosquitoes. These mosquitoes become infected when they feed on infected birds, which are the virus's primary hosts. West Nile virus is more commonly found in parts of Africa, Europe, and North America, but cases have also been reported in other regions. 

Symptoms of West Nile Fever

• Fever
• Fatigue
• Headache
• Body aches
• In severe cases: brain inflammation

Prevention Tip

Apply repellents at dusk and dawn, and limit outdoor lighting to reduce mosquito attraction.

Lymphatic Filariasis

Lymphatic filariasis, commonly called elephantiasis, is a parasitic disease spread by mosquitoes such as Culex, Anopheles, and Aedes. It leads to painful swelling in the limbs, breasts, or genitalia and is caused by roundworm parasites that harm the lymphatic system. The infection spreads from person to person through bites from infected mosquitoes.  

Symptoms of Lymphatic Filariasis

• Swelling in the legs
• Swelling in the arms or genitals
• Fever and discomfort
• Permanent disability in severe cases

Prevention Tip

Mass drug administration programmes help prevent its spread. Keep surroundings dry and clean to minimise mosquito breeding sites.

Factors Responsible for Mosquito-borne Diseases

Several factors contribute to the spread of mosquito-borne diseases. These are listed below:

• Poor Public Hygiene: A lack of public awareness and hygiene is a significant factor in the transmission of mosquito-borne diseases. Open drains and stagnant water provide active breeding grounds for mosquitoes.
• Climate: The monsoon season and warm temperatures increase mosquito breeding, thereby increasing disease transmission.
• Urbanisation: Rapid urbanisation, poor sanitation, and waterlogging contribute to mosquito breeding in urban areas.
• Population Density: High population density facilitates the spread of diseases.
• Lack of Public Health Measures: Ineffective vector control, surveillance, and healthcare access significantly affect disease intensity.

Hence, proper sanitation and hygiene measures must be implemented at home and in public places to check the spread of mosquito-related diseases.

Smart Prevention Tips to Protect Yourself from Mosquito Diseases!

Nobody wants itchy bites or to risk the diseases mosquitoes can transmit. Here are some simple, everyday tips to protect yourself from these mosquito diseases.

Prevention Tips for Home & Outdoors

• Apply insect repellent.
• Wear long-sleeved clothing and trousers during mosquito-active hours.
• Use screens on windows and doors or mosquito nets.
• Remove standing water in empty buckets, repair gutters and cover water tanks.
• Use fans or air conditioning if possible, as strong airflow helps prevent mosquitoes.

Prevention Tips for Travelling 

• Determine if mosquito-borne diseases are prevalent at your destination.
• Get vaccines when they are available (e.g., yellow fever, etc).
• Consider taking prophylactic medicine to prevent malaria.
• Choose accommodations that have mosquito protection.

Be Informed about Diseases Transmitted by Mosquitoes

It is important to note that specific data and trends can vary from year to year. For the most up-to-date information, readers should always refer to the latest reports from health authorities such as the National Centre for Disease Control (NCDC) and the Ministry of Health and Family Welfare.

Furthermore, it is essential to plan your finances for health emergencies. The best way to do so is to secure adequate health coverage against critical illnesses.

Protect Your Health and Finances: Get Covered Before It’s Too Late

While a single mosquito bite may seem harmless, the expenses for treating diseases like dengue or malaria can add up and impact your finances. That’s why having a good health insurance plan is so important- it’s a smart safeguard. With the right coverage, you'll enjoy benefits like cashless hospitalisation, diagnostic help, and a sense of security whenever you face medical emergencies.

Pro Tip: Choose a family health policy that covers vector-borne and seasonal diseases to protect your entire family year-round.

Don’t Wait for the Bite, Act Now! 

Mosquitoes might be small, but they can carry serious diseases like dengue, malaria, chikungunya, and Zika, which can really affect your health, daily routine, and budget. Just one bite can lead to illness and unexpected medical expenses. To stay safe, keep your environment clean, remove any standing water, and use mosquito nets or repellents, especially during their peak activity. Having good health coverage is also essential for managing medical costs and focusing on getting better. By staying alert and protecting your loved ones year-round, you can keep yourself safe from mosquito-borne illnesses.

Disclaimer: It is essential to verify the policy details and coverage with the official policy documents. Also, kindly consult a medical professional to confirm the details of your health concerns.