Vairimorpha disparis (entomopathogen)
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Vairimorpha disparis (entomopathogen) (Timofejeva, 1956)
This microsporidian is a pathogen of the gypsy moth, Lymantria dispar. Larvae can became infected by feeding on spores. They develop a white and swollen fat body and usually die during the pupation process. The pathogen produces three types of morphologically different forms of spores which appear in successive stages during the development of the disease, see Vavra et al. (2006). For example, shortly after becoming infected, binuclear primary spores are formed in the midgut of the larvae which distribute the pathogen throughout the body of the host.