Table of Contents
Murray Valley Encephalitis
This mosquito borne disease can be deadly, and the highest rate of infection occurs in northern Australia. There is no known treatment or vaccine for this disease as yet, and the patient is treated therapeutically, managing the symptoms. In many cases, the patient will make a full recovery, but for others, brain damage can be severe, and may necessitate long-term care. Symptoms include:
- Fever
- Confusion
- Drowsiness
- Headache
- Stiff neck
- Nausea and vomiting
- Tremors
- Seizures
- Encephalitis

Chikungunya
Another disease transmitted by the Aedes mosquito, Chikungunya can be considered deadly for some patients. However, if the patient receives treatment quickly and the disease is managed appropriately, they will normally make a full recovery. The main symptoms are:
- Joint aches
- Muscle pains
- Headache
- Vomiting
- Back pain
- Depression
- Fatigue
- Rash
Japanese Encephalitis
Commonly found in areas such as Asia, north Queensland in Australia and New Guinea, Japanese encephalitis is a serious disease that affects the brain. Although many recover fully from this disease, it can lead to permanent damage to the brain or even death. Generally it is treated with a vaccine and supportive measures. Symptoms include:
- Fever
- Headache
- Seizures
- Coma
Dog Heartworm
More commonly found in dogs and cats, Dog Heartworm can also be transferred to humans by mosquito bite. Often found in America and Canada, the severity of this disease in humans can range from mild to severe. The heartworm is actually a roundworm, and when the mosquito bites, the larvae are transferred in the saliva. Many people show no symptoms, but for others the following may occur:
- Pain in the chest
- Hemoptysis (coughing blood)
- Cough
- Wheeze
- Mild fever
- Malaise
- Chills
Western Equine Encephalitis
Back in 1930, Western Equine Encephalitis was discovered in Mexico and Canada. Commonly found in horses, there are also up to 1000 human cases reported each year. There is no specific treatment fort Western Equine Encephalitis other than supportive measures, managing symptoms. The risk is more severe in babies, and if encephalitis develops it can lead to brain damage or death. Symptoms that can occur include:
- Fever
- Headache
- Neck stiffness
- Vomiting
- Lethargy
- Confusion and disorientation
- Irritability
- Seizures
- Coma
READ Home Remedies for Mosquito Bites
Conclusion
This is just a selection of some of the diseases carried by mosquitoes and passed on to humans. Perhaps the scariest thing about them is that the symptoms, especially in the early stages, are almost all the same. They are typical of many viral infections, of which a lot of patients don’t bother to seek treatment. Therefore, they may be infected with a deadly disease and not even realize it until it’s too late.
Most mosquito borne diseases have no cure, or specific treatments, and depending on where you are in the world, treatment options may be even less than in Western countries. If you have traveled overseas, or live in any country that is prone to these diseases, it is imperative that you seek medical assistance at the first sign of any illness.
- www.betterhealth.vic.gov.au/health/conditionsandtreatments/murray-valley-encephalitis
- www.health.state.mn.us/divs/idepc/diseases/weencephalitis/wee.html
- www.wonderslist.com/10-deadliest-diseases-caused-by-mosquitoes/
- Photo courtesy of turkletom: www.flickr.com/photos/turkletom/4584117897/
- Photo courtesy of theglobalpanorama: https://www.flickr.com/photos/121483302@N02/14282323720/
- Photo courtesy of theglobalpanorama: https://www.flickr.com/photos/121483302@N02/14282323720/
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