Fear of insects - one of the most common phobias person. In addition to the unsightly appearance, flies, mosquitoes, mites are often a threat to humans.
Rat fleas, plague gave rise to the XIV century - a clear confirmation.
Around the lives countless insects,the dimensions of which are so small that these creatures seem quite harmless. But this is a misconception. Many of them are capable of much harm to people.
Rat fleas - it's very tiny insects,which can be contrary to the name of the plant and have pets. Yet it is the most dangerous are the fleas that live on the body of the rat - the peddler of terrible diseases and bacteria. That rat fleas caused the Black Death of the XIV century in Europe that killed tens of millions of people.
In the nineteenth century, an epidemic broke out again, hitting 6million people in India. Today these bacteria pose a risk to a greater extent to the third world countries, as sanitary conditions and the level of medicine in the United States and Europe do not allow the disease to spread.
Mosquitoes are found everywhere, where the air temperaturereaches 10 ° C or higher, they are most active in the evening. Most mosquitoes do not threaten human life and health, but some members of this species are carriers of various serious diseases: encephalitis, yellow fever, malaria.
Malaria is particularly prevalent in tropical and African countries. Up to 500 million people a year suffer from the bites of Anopheles mosquitoes, the mortality rate reaches 3 million people a year.
90% of cases of humans from the bite ofinsect falls on Africa, where almost not taken anti-malaria measures. However, even in the United States it was recorded 1,000 cases, 8 of them - with fatal consequences.
These parasites are carriers of encephalitis andfound around the globe, including the Arctic and Antarctic. Effects of tick-borne encephalitis can be very different: from recovery to death or disability. The fact that encephalitis affects the central nervous system, and the bite of an infected tick needed urgent hospitalization.
Only in Russia is fixed annually about 3000 cases bite tick encephalitis, and 50 fatalities.
It is a large fly, reaching 1.5 cm in size. Distributed in Africa. The bite of these insects cause sleeping sickness, where there are infringements of the nervous system: Fatigue attacks are replaced by hyperactivity. In Uganda, for the past 6 years, more than 200 000 people have died from sleeping sickness.