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The atracotoxins of Australian funnel-web spiders work by opening sodium channels, causing excessive neural activity including strange sensations (paresthesias), muscle contractions, unstable blood pressure (hypertension or hypotension). The venom may cause fluid to accumulate in the lungs (pulmonary edema) that can be fatal.
Hypertension is the leading cause of strokes and studies show that it increases the risk of a stroke by 220% [17] [18] and stroke is the leading cause of long-term disability. [19] High blood pressure weakens arteries (small vessel disease) and causes blood vessels to be more likely to clog and/or burst.
The widow spiders (genus Latrodectus), such as the black widow, redback spider, and katipÅ are spiders that carry a neurotoxic venom [18] which can cause a set of symptoms known as Latrodectism. Widow spiders are large, shiny house spiders with relatively spindly legs and deep, globular abdomens.
A diagram explaining factors affecting arterial pressure. Pathophysiology is a study which explains the function of the body as it relates to diseases and conditions. The pathophysiology of hypertension is an area which attempts to explain mechanistically the causes of hypertension, which is a chronic disease characterized by elevation of blood pressure.
The high blood pressure eventually leads to heart failure, strokes, heart attacks, blindness, kidney failure, loss of libido and poor circulation of blood in the legs. When the blood supply to the feet is compromised, the chances of infections and amputations also increases.
A spider bite, also known as arachnidism, is an injury resulting from the bite of a spider. The effects of most bites are not serious. [1] Most bites result in mild symptoms around the area of the bite. [1] Rarely they may produce a necrotic skin wound or severe pain. [2]: 455 Most spiders do not cause bites that are of importance. [1]
“The majority of the spiders cause us no harm and are predators of pests,” says entomologist Roberto M. Pereira, Ph.D., an insect research scientist with the University of Florida. Translation ...
Along with other members of the genus, they are often referred to as Brazilian wandering spiders. [ 2 ] Its bite can cause severe symptoms, including increased pulse, blood pressure, and respiratory rate; extraordinary pain; penile erection that lasts for several hours ; and, in several documented cases , death.
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