Parasitoses

Parasitoses is the set of all parasites living in the body of man or animal. The followers of parasitocenosis are not only multicellular parasites such as worms, larvae of flies, but also various protozoa, bacteria, spirochaetes, rickettsiae and viruses. In General, the species composition of parasitocenosis depends on the age of the owner, his dwelling place, the type of food, time of year and the number of other reasons. Between the followers of parasitocenosis are indifferent, symbiotic or antagonistic relationship that has implications for the manifestation of their actions on the host (for example, some parasites can change for any infection or action of medicinal products).
Cm. also Biocenosis, Parasitological, Parasites.

Parasitoses (from the Greek. parasitos - parasite and koinos - General) - a group of living organisms in any bodies of humans or animals, for example in thin or large intestine, mouth, lungs, vagina, and other
Part of parasitocenosis consists in various combinations rickettsiae, spirochaetes, bacteria, fungi, protozoa, parasitic worms, rarely tyroglyphoidea mites and insects, mainly in the larval phase (E. N. Pavlovsky, 1937-1961). The species composition of parasitocenosis can be very diverse variety of different animals, humans and in different organs.
Animals P. may vary depending on power, time of year, age of the owner. A person changes P. may depend on the age composition of food, food processing, domestic, sanitary and other conditions.
Calf of mammals, as a human child, usually born with a sterile contents of the digestive tract and respiratory organs. The exception is the relatively small parasitic protozoa and other microorganisms (causing syphilis, toxoplasmosis, malaria, cercopoidea, some trypanosomes and others)capable of in utero (via the placenta or through other ways to infect the body of the developing embryo or fetus. Soon, however, sometimes in the first minutes after birth, residence born of the body first, bacteria, and then and other parasitic organisms. In the future, is the formation of various parasitocenosis in different organs. One of followers on can be harmless or even beneficial for his master, as, for example, some bacteria in the intestine, and other pathogens of viral, bacterial, protozoan and helminthic diseases can have some pathogenic effect.
Between the individual followers of parasitocenosis, including the causative agents, there are various relationships: antagonistic, synergistic, or indifferent. The antagonistic relationship exists, for example, between the Ascaris and Giardia. That is why the presence of Ascaris in the small intestines Giardia or does not develop, or are there in very small amounts. The opposite attitude is observed at present in the intestines of some denied and lamblia, which demonstrates synergistic relationship between these followers P.
The artificially bred beznakazannym (sterile) animal development of infection in the gut, such as amebiasis, flows differently than in animals grown in normal conditions. Thus, contamination of the sterile Guinea pigs Entamoeba histolytica they have no formation of ulcers in the intestines, while at the same animals, taken from the nursery, in the same conditions formation occurs in the gut heavy defeats. Note that the presence of parasitocenosis some parasitic organisms may reduce or completely remove the effect of a range of therapeutic drugs. Cm. also Biocenosis.