Scanning electron microscopy of spores of the myxosporidans Chloromyxum trijugum Kudo and Chloromyxum catostomi Kudo.
Spores of Chloromyxum trijugum Kudo from Lepomis macrochirus Rafinesque and Chloromyxum catostomi Kudo from Notropis dorsalis (Agassiz) were obtained from infected gall bladders, glass-bead sonicated, and examined by scanning electron microscopy. Valves of C trijugum spores each have a thick ridge running parallel to the sutural ridge. Uncapped cnidocyst pores open into the extrasutural ridges. A pyriform structure of unknown function was observed at the posterior surface in some spores. Spore valves of C catostomi are sculptured with ridged striations running in various parallel and converging patterns over the entire surface. Cnidocyst pores open into ridges adjacent to the sutural plane. Glass bead sonication was found effective in polar filament extrusion. Discharged filaments were twisted along the long axis and partially coated with mucoid globules.
D000818:Animals; D016782:Apicomplexa / Q000145:classification / Q000648:ultrastructure*; D005399:Fishes / Q000469:parasitology*; D005704:Gallbladder / Q000469:parasitology; D008855:Microscopy, Electron, Scanning