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.

REFERENCE

Weizer, J. Mikrobiologicheskie metody bor’by s vrednymi nasekomymi. Moscow, 1972. (Translated from Czech.)
References in periodicals archive ?
Nosema apis Zander, is a microsporidian pathogen of honey bees, Apis mellifera L.
Molecular detection of Nosema was conducted using the associated abdominal DNA extractions, with PCR primers that were designed by finding conserved regions in aligned Nosema small subunit (SSU) sequences obtained from GenBank (Geneious v6.
mellifera samples (245 AHB, 272 EHB), collected from Arkansas, Mississippi, Texas, Utah, Oklahoma, and New Mexico from 1991 to 2010, were subjected to PCR-RFLP analysis for molecular identification of Nosema apis and N.
Prevalence of Nosema from AHB was highest in Texas (12%) and lowest in New Mexico (3%), although there was no significant difference (P = 0.
We did not detect Nosema from the 1991 and 2004 Texas samples, but the small sample sizes (17 and 10, respectively) may be the reason for not detecting it.
Several statewide Nosema surveys have been conducted on managed honey bee colonies in the United States.
We found that Nosema was widespread throughout the southwestern and south central United States.
Nosema and tracheal mites in the North Central region --2008 survey.
Nosema ceranae is a long-present and widespread microsporidian infection of the European honey bee (Apis mellifera) in the United States.