[Study on the time limitation of carrying Yersinia enterocolitica by Periplaneta americana and flies].
D000818:Animals; D003058:Cockroaches / Q000382:microbiology*; D004175:Diptera / Q000382:microbiology*; D007303:Insect Vectors; D013997:Time Factors; D015008:Yersinia enterocolitica / Q000302:isolation & purification*