What arachnids should be known to a doctor, agronomist, veterinarian?

There are spiders, the bite of which can cost the life of a person or animal. When bitten, they inject poison into the wound, which has a toxic effect. It is known that spiders do not attack humans or animals themselves; they usually bite their prey in defense. The following spiders are found in our region, which can pose a threat to humans or animals. Tarantula – the bite is similar to the bite of a hornet, often there is an allergy at the site of the bite, damage to the nervous system. Karakurt is one of the most poisonous spiders; in our region there is a steppe widow and white karakurt. The bite is similar to a needle prick, after the bite there may be convulsions, shortness of breath, loss of consciousness. The cross and the yellow bag often live in household plots, arable land, and forest belts. A bite for humans or animals can cause nausea, headaches, but not fatal.