The most deadly spider in North America is the Black Widow spider. It is considered a lethal spider for its venom contains a powerful neurotoxin. Although not always fatal if properly treated, the bite is painful. A bite from the female spider will cause more problems than the bite of a male spider because it has a largest venom sac.
If the spider bite victim knows that they are in a place that could be a likely source of Black Widows, for instance if they were working in a damp basement, crawl spaces, or near wood piles, many do not register the short stabbing pain as a spider bite. In most cases, if the affected area is not a highly sensitive location the bite might not be noticed until slight swelling and a red ring appear around two tiny puncture marks. Physical symptoms of the Black Widow spider bite may appear within the first two hours following a bite.
The bite of a Black Widow spider is characterized by two puncture marks and a small red ring. It is not uncommon for several smaller blisters to form near the injection site. In this photo the Black Widow spider bite victim has two bite marks that are present on the finger. By using pen marks the victim should circle the bite to track the progress of the infection.
Image by just_a-name_thingie “spider bite”
By nature Black Widow spiders are hunters which rely on their skills as web weavers to snare their prey. As spiders are not capable of stalking prey and don’t hide in dark corners to pounce on unsuspecting human, they are very protective of their web. When an invader enters the spiders circle of comfort, it is likely to strike out. The venom which the Black Widow spider injects, like many venom-producing animals, works to slowly paralyze the victim and dissolve the internal organs to make for easier digestion. While the human victim is not going to immediately succumb to the rapid organ failure like an insect, it will being experiencing side effects which can range from mild to severe. As the Black Widow Spider is one of the deadly spiders, its bite and symptoms should be monitored closely. Some of they symptoms that may arise as a result of the spider bite are:
Intense muscular cramping which may cause cramping or tremor. Cramping usually originates in the abdomen and spreads to the back, shoulders, and thighs.
Neurological side effects of the bite include headache and increased anxiety.
The skin may become intensely itchy and sweating may occur, but in rare cases will there be any necrosis (dying and sloughing) of the skin.
Weakness, labored breathing, fever, nausea and increased blood pressure are also indications of the venom moving though the body of the victim.
Within 24-48 hours if the wound has not been attended to necrosis (dying) of the surrounding tissue may occur. In this image, the skin immediately surrounding the injection site is fading from red to white, an indication that tissue damage is progressing.
Image by brendaj “spider bite on my arm”
Black Widow spider bite in later stages of necrosis. The black skin will eventuall slough away and leave an open wound exposed to secondary sources of infection.
Image: Black Widow Bite Source: Armaxx Pest Control Services