Observations on the Susceptibility of Some Insects to Nosema (Microsporidia: Sporozoa)

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Abstract
A species of Nosema isolated from Tribolium will also infect per os Tenebrio molitor, Galleria mellonella, and Bombyx mori. Nymphs of Blaberus craniifera, Byrsotria fumigata, and Periplaneta americana as well as larvae of G. mellonella, B. mori, Hyalophora , cecropia, and Tribolium are susceptible to the parasite when it is introduced surgically. Spores recovered from surgically infected H. cecropia remain infective per os for Tribolium. The susceptibility of the various hosts is discussed with respect to the condition of the host''s alimentary canal.