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DISEASES TRANSMITTED BY THE FLIES HAEMATOLOGIC.

   Within all the classes of flies, the flies exist haematologys, are insects ectoparasits that feed on blood of other animals or people, by means of a bite buccal apparatus and a device that has of the head with that they prick to his victims.

The Fly Tsetsé

  African flies of the genre Glossina that are named equally, abounds in the forests, shores of rivers and lakes in the central Africa. These species of flies are studied for that they transmit a mortal causative parasite of the Sleeping sickness (Rhodesia) in the persons and Nagana in the cattle, horses and the goats of the south of Africa. The parasites tripanosomas are absorbed by the insect when it bite the affected person, introducing in other persons as well as is stinging.
When the animals are affected continuously by the Nagana can get to be immunized themselves against her. This disease is one of most devastating of all the African continent, mainly in the central zone, with 80% of deaths in the victims affected, killing annually of three million of head of cattle . All this together with that affects to the poorest population of the planet, creating an economic loss in the meat production and milk, like in the control and elimination of the disease.

The flies tsetse belong to the group of the flies haematogaphas.

The Fly of the Sand

    Tiny and to nibbled they are important vectors of numerous human diseases, including the kala-chance or fever dumdum, the button of East and the tertiary fevers. These flies are native of the tropical and subtropical regions of the world. The females have a drilling buccal apparatus, they are fed mainly on the blood of the mammals, biting them especially by night, on the contrary that the males who feed themselves of nectar of the plants. They grow in humid, shaded and mossy lands. The species of fly of the best known sand is the one that transmits the virus of the disease known as Tertiary Fever and Changres's Fever. The symptoms are similar to dengue, but almost never he is mortal, although it incapacitates to his victims of one to nine days. This takes place mainly in Asia minor, in the south of Asia and Europe and in North Africa. This fly is a carrier of the disease as soon as it she has consumed blood contaminated by the virus. In addition it is believed that the female transmits the virus to your babies.

These small flies transmit numerous diseases for his bite.

Horselfly

   It is an insect of the order of dipteral well-known for the pain that causes his sting. Only the females can sting four to feed of blood, need a rich food in proteins, to attend to the needs of nutrients in the production of the eggs. In her search of food they are oriented by silhouettes and smells; for that reason the females of the horselfly are attracted for the people who wear dark clothes and the animals whose layer is equally dark, mainly if transpiran actively, that for whom it takes clear colors. The males are nourished of plant juices. The larvas settle in soils soaked in water, where they feed of other insects. In African zones some species transmit the Loasis, affecting million persons.

They are the females of the horse-flies those who sting.

The Fly of the Stables

    Both the males as the females feed on blood that they suck of the animals of farms , inside the dependences of intensive animal production. They are established of abundant form about the places feeding, areas of rest of the cattle of milk, and stables. They prefer the sunny and zones outer, as accumulated forage, manure mixed with straw, etc. They are not in the habit of to breeding inside the buildings. Las flies when they are fed usually are placed in the inferior parts of the animals, especially in the half low of the legs. These flies attack the persons with the same facility that to the cattle.

These flies not only attack to the animals in the stables, also to the persons.

Fly of the Horns

    It is a small fly that parasitizes mainly in the bovines, feeding itself by bites and sucking the blood to his victims, this produces disquiet and annoyances to these bovine ones. Natural of South America, has spread over in different zones. For his reproduction it needs the dung of the bovines exclusively, where it deposits his eggs. When it is fed of the bovines, that can be by day or at night, it causes irritation and malaise, feed themselves and to rest with tranquillity. This produces an effect of reduction of weight and milk production in the cows. The use of methods of control of plagues to eradicate these flies is very useful and thus to eliminate the possible economic damages.
 

This fly is original of South America, though in the last times it has spread to other zones.