These are the six most venomous spiders in the world. Although they're small, they WILL kill you swiftly.
The Brown Recluse
The Brown Recluse is one of the few significantly venomous spider species in the U.S. They primarily inhabit the Southern and Southeastern parts of the United States. As their name suggests, they prefer keeping to themselves despite being extremely poisonous.
About half of all brown recluse bites result in harmful symptoms. When their fangs manage to pierce through your skin, the results can be very dangerous. Typical symptoms include nausea, vomiting, intense muscle and joint pain, skin rashes. and high fevers. The skin that has been bit will oftentimes either die or become infected in a process known as necrosis. Their bites can also cause loxoscelism; a condition in which the damaged tissue becomes gangrenous and begins sloughing away slowly due to the gangrene. Additionally, once the venom makes its way into your bloodstream, you may experience blood clotting, organ failure leading to a coma, and ultimately, death.
Although most healthy adults are likely to survive a brown recluse bite, children, the elderly, and those with weak immune systems are at greatest risk of dying or suffering from the severe symptoms. The bites themselves tend to be painless, meaning they can often take between two to eight hours before any harmful effects begin appearing. Fortunately, antivenom and modern medicine have proven to be effective treatment methods. Experts suggest, however, that once a person is bit, an attempt must be made to capture the spider and take it with when seeking medical help as it is fairly common for bites to be misdiagnosed. Chemical burns, various skin infections, and even herpes and syphilis have often been mistaken for brown recluse bites. In fact, it is estimated that close to 80% of all reported bites are actually misdiagnosed.
The Yellow Sac Spider
The Yellow Sac Spider refers to a range of spider species that are native to many parts of the world, including Japan, Europe, Australia, Africa, and India. Like the brown recluse, the yellow sac spider's bite is highly venomous and can cause necrosis of the skin. In some instances, their bites have also been known to cause MRSA infections, which can be deadly if not treated appropriately.
Also known as staph infections or Methicillin-resistant Staphylococcus aureus, MRSA is a bacteria that causes difficult-to-treat infections in humans. Symptoms include boils, impetigo, and in more severe cases, pneumonia and death.
Yellow Sac Spiders are well known for being attracted to the smell of gasoline. They also have an inexplicable proclivity of weaving webs inside of Mazda vehicles. This is problematic as it can lead to fuel blockage and fuel pressure buildup, which can ultimately start an engine fire. As a result, Mazda recalled some of their Mazda 6 models in order to place software that notifies drivers of any yellow sac spider-related problems in the engines.
The Redback Spider
These poisonous spiders make their home in Australia. They prey on insects and other spiders, injecting them with their venom in order to kill them. They then wrap the insects up in their silky webs and suck out their insides. They've even been known to hunt down and kill larger prey, like lizards. Redback spiders also present a serious threat to humans when they interact. In fact, they are the cause of the majority of serious spider bites in Australia.