What is "nosema"

Etymology 1 n. disease, sickness Etymology 2

n. (context honey bees English) (l en nosema disease id=bees gloss=infectious disease of adult honey bees caused by some microsporidian parasites)

Nosema is a genus of microsporidian parasites. The genus, circumscribed by Swiss botanist Karl Wilhelm von Nägeli in 1857, contains 81 species. Most parasitise insects and other arthropods, and the best-known Nosema species parasitise honeybees, where they are considered a significant disease by beekeepers, often causing a colony to fail to thrive in the spring as they come out of their overwintering period. Eight species parasitize digeneans, a group of parasitic flatworms, and thus are hyperparasites, i.e., parasites of a parasite.

Nosema may refer to:

• Nosema (microsporidian), a fungus genus in the division Microsporidia
• Nosema (plant), a plant genus in the family Lamiaceae