These Animals Cause Humans The Most Fatal Harm
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The Deadliest Animals in the World

The worlds deadliest animals carry disease, venom, and anger. They attack to protect, to survive, or out of pure vengeance. After researching the many animals that cause harm to humans, these are the most consistent results.

1. Mosquitoes: 725,000

Mosquitoes carry diseases such as malaria, Zika Virus, yellow fever, dengue virus, West Nile Virus, and chikungunya virus. Malaria alone caused 446,000 deaths in 2016. 91% of those deaths happened in Africa. Many of the other diseases listed are most common in Latin America. There is a yellow fever epidemic in Brazil right now, while Zika continues to affect pregnant women in many South American countries. Mosquitoes-borne illnesses are becoming a world issue as each day passes. Things such as mosquito repellents, insecticide covered bed nets, and large amounts of research are a huge part of the mosquito-borne illness resistance.

2. Humans: 475,000

Humans are the most dangerous mammals in the world. Homicide rates in inner cities grow daily. Terrible instances of school and church shootings and fatal acts of terrorism are what put the human to human-caused deaths so high up on this list. Countries within Latin America and states within the United States have the highest rate of homicides within their cities.

3. Snakes: 50,000-100,000

If you live in North America, Australia, or Europe this isn’t a huge concern of yours. If you live in places such as India, the Middle East, sub-Saharan Africa, or Southeastern Asia, it’s a totally different story. Snake venom comes in three different forms. The first is Hemotoxic venom. This venom attacks your cardiovascular system. Then there is Cytotoxic venom. This venom attacks your muscle groups. Lastly, there is Neurotoxic venom. This venom attacks your brain and nervous system. No matter which venom it is, it can cause fatal results instantly, or if not treated quickly. The scary part of being bitten is that there is very little antivenom accessible in places that have high rates of snake bites.

4. Dogs: 25,000

Man’s best friend isn’t always friendly. Don’t panic though, your beloved golden retriever down the hall isn’t going to turn on you. It’s specifically dogs infected with rabies that cause this number of deaths. Rabies is a contagious and fatal virus. You’ve most likely heard of raccoons carrying this disease. It is spread by the animal’s saliva. The symptoms it includes are fever, headache, excess salivation, muscle spasms, paralysis, and mental confusion. Once these symptoms appear it is almost always fatal.

5. Teste Fly & Assassin Bugs & Freshwater Snails: 10,000

These three animals are small but frightening. Starting with the Teste Fly, this bug carries a parasite called trypanosomiasis. This is also called the “sleeping sickness” due to it disturbing a persons sleep patterns. This disease is most common in the sub-Saharan Africa. The scariness of this disease is that it can often go undetected until it is too late. Then there is Assassin bugs or the “Kissing bugs.” These bugs carry a parasite that causes major damage to organs that can be fatal. Finally, Freshwater Snails. These snails carry parasitic worms that infect people with a virus called schistosomiasis. This causes abdominal pain and blood in the stool or urine. It is said that the death rate due to schistosomiasis could be much larger than recorded.

6. Roundworms: 4,500 deaths

Roundworms carry an infection called ascariasis. This is an infection in the small intestine. It is most commonly found in tropical and subtropical regions, such as Latin American and sub-Saharan Africa. People get roundworms by accidentally ingesting their eggs. Roundworms lay their eggs in soil that is usually contaminated by feces. Children are most commonly affected by ascariasis by playing in the soil and then putting their hands in their mouths that have the soil infested eggs in them. Most people do recover from ascariasis, but if the infestation gets out of hand then the symptoms caused can take someone’s life.

Other notable animals:
  • Crocodiles are responsible for 2,500 deaths
  • Hippopotamus are responsible for 500-1,000 deaths
  • Elephants and lions are responsible for 100 deaths
  • Sharks are responsible for 6 deaths

***All numbers were gathered by multiple resources. The numbers used here are the most common results found.