Nonsusceptibility of Rats to the Entomogenous Nematode, Neoaplectana carpocapsae1

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Abstract
Rats inoculated either per os or intraperitoneally with infective-stage juveniles of Neoaplectana carpocapsae showed no signs or symptoms of pathogenicity, toxicity, evidence of infection, or nematode-related histopathology. Blood and urine samples did not reveal nematode presence. No significant differences were noted in weight gain between treated and control animals after 36 days. Nematodes recovered in fecal samples from per os inoculated rats were virtually all dead. Those recovered from intraperitoneally-inoculated rats were usually encapsulated.