Inoculation of a spore suspension of Aspergillus flavus in the haemocoel of the German cockroach (Blatella germanica) resulted in large-scale invasion of various internal organs as seen in tissue sections stained with a fungal stain. The organs affected were the alimentary canal, fat bodies, muscle fibres, malpighian tubules and the cerebral neurosecretory cells. No invasion of the trachea and tracheoles was noted.
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