Herpetomonas oestrorum--a parasite within a parasite.
D000818:Animals; D001188:Artiodactyla; D003141:Communicable Diseases; D004175:Diptera; D004199:Disease Vectors; D056890:Eukaryota / Q000302:isolation & purification*; D009198:Myiasis; D010271:Parasites