Spiders treat the most ancient inhabitants of our planet. This type of arthropods appeared more than 400 million years ago. At the moment the science knows 40,000 types of spiders, 30,000 of which are poisonous. But most of them have too fragile and short canines to bite through skin of the person.
What the sting of a spider is dangerous by
The sting of a spider causes necrosis and has neurotoxic action. The first type of influence is inherent in brown and some domestic spiders, the second – family of karakurt. The most poisonous component of poison is peptide which breaks neuromuscular transfer.
Remember that the sting of a spider is always poisonous as this type of arthropods belongs to predators which by means of poison are protected and get to themselves food. The sting can be just unpleasant or deadly.
How to define a sting on skin
The sting of a spider is shown by a white spot with the red or pinkish edge at once. In 5–20 minutes, muscle pains, often spasms, reddening and a face edema develop. It is easy to identify the place of attack of a tarantula on a spherical spot of pale color. In 1–2 hours the blister can turn into a wound. The lack of measures will lead to formation of an erosive wound. The brown spider hermit leaves a mark of irregular shape with a bluish-purple, red and white border. Quickly increasing spot turns into an ulcer on the surface of skin over time. It is the most difficult to define a sting of the karakurt which is not shown on skin. By the most thorough examination it is possible to notice a microscopic red dot which in the shortest possible time disappears.
Symptoms of a sting of a spider
The sting of a brown spider provokes severe pain which covers the injured part of the body. The itch which is deployed in the place of a sting extends to all body. System effect of poison is shown by fever, a fever, nausea and vomiting, arthralgia, spasms, arterial hypotension, thrombocytopenia, a renal failure. The sting of the karakurt is shown by consolidation in the place of a sting, pain in the right podreberye which has similarity to an attack of the inflamed appendix. Sharply temperature increases, the headache appears and amplifies, the general weakness and an ache in joints is observed. The black widow — a female individual of the karakurt, her sting is carried to the most dangerous among all which can put arthropods. Within an hour after a sting the perspiration, an eritema and a piloerektion in the place of a sting, excitement, concern, hypostases a century and extremities, breath difficulty is observed. Stings of a tarantula extremely seldom have a lethal outcome and are in most cases connected with internal pathologies. The steppe inhabitant of holes seldom meets in the afternoon therefore his stings – it is rather a rarity. However the angered arthropods are capable to dump hairs which at hit in eyes or on skin can become the reason of development of an urticaria, Quincke's edema, a bronchospasm, arterial hypotension.