Hookworms - a genus of parasitic roundworms of the suborder Strongylida . Adult stages parasitize in the intestines of vertebrates . When feeding, they destroy the intestinal walls, secreting enzymes that have proteolytic activity and interfere with the coagulation of the host blood when feeding the helminth. Duodenal hookworm (crankhead) - Ancylostoma duodenale and Necator - Necator americanus - dangerous human parasites that cause hookworm disease . According to the US Centers for Disease Control and Prevention, the number of people infected with hookworms worldwide is 576-740 million [1] .
| Hookworms |
Ancylostoma caninum on the intestinal mucosa |
| Scientific classification |
|---|
| No rank : | Bilateral symmetrical |
| Superfamily : | Ancylostomatoidea Chabaud, 1965 |
| Subfamily : | Ancylostomatinae |
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| International scientific name |
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Ancylostoma Dubini , 1843 |
| Kinds |
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- Ancylostoma braziliense
- Ancylostoma caninum
- Ancylostoma ceylanicum
- Ancylostoma duodenale
- Ancylostoma pluridentatum
- Ancylostoma tubaeforme
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The front end of the body
Ancylostoma duodenaleContent
Distributed in countries with a tropical and subtropical climate between 45 ° north and 30 ° south, where 50% of the local population is invasive, which is a quarter of the world's population, but some are more common in areas with hotter climates.
Foci of hookworm infections are identified in the areas of mines and mining. The main condition for the occurrence of such foci is high soil moisture and contamination with its feces.
The introduction of larvae through the skin causes burning, itching, redness of the skin. At the time of migration, pulmonary disorders, mechanical damage to the walls of blood vessels, and minor hemorrhages in organs are observed. Mature individuals cause the formation of large ulcers (up to 2 cm) in the intestine, progressive anemia as a result of blood loss and intoxication. There are severe digestive disorders, general weakness, severe pain, sometimes a perversion of taste.
A. caninum crushing under the egg membranes
- ↑ Hookworm . Centers for Disease Control and Prevention (10 January 2010).
- Zoology of Invertebrates / Ed. W. Westheide and R. Rieger, M.: KMK scientific publications, 2008.
- Biology, edited by V. N. Yarygin, Moscow, "Medicine", 1984.
- Ankylostoma // Brockhaus and Efron Encyclopedic Dictionary : in 86 volumes (82 volumes and 4 additional). - SPb. , 1890-1907.
