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Nosema |
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Nosema
a genus of endocellular parasitic protozoans of the order Myxosporidia. There are more than 90 species of Nosema—according to some sources, about 120 species. The Nosema are animal parasites that attack either certain tissues and organs or the entire body of the host. Some species are economically harmful, infesting silkworms, fish, bees, and commercially valuable invertebrates. Other species, which cause epizootics among crop pests, can be used for the biological control of economically harmful organisms. A typical representative of the genus is Nosema bombycis, a parasite of the Asiatic silkworm; its spores, which are about 8 microns long, are structurally complex. REFERENCEWeizer, J. Mikrobiologicheskie metody bor’by s vrednymi nasekomymi. Moscow, 1972. (Translated from Czech.)Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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No references found | In 1997, just months before he began his monitoring project, Thorp attended a symposium of the Entomological Society of America during which he learned that an outbreak of Nosema bombi--a fungus that lives in the bees' intestinal track--had wiped out commercial populations of B. Mooted culprits include a blood-sucking mite called varroa; a single-celled fungal parasite called Nosema cerenae that causes bee dystentery and pesticides used in fields that are pollinated by bees. The bees returned infected with nosema ceranae, a single-celled protozoa originally from southeast Asia, which destroys the bees' digestive tract. |
Nosema |
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