Viability of the first stage larvae of Angiostrongylus costaricensis in rat feces.
D000818:Animals; D005243:Feces / Q000469:parasitology*; D007814:Larva / Q000254:growth & development; D009068:Movement; D051381:Rats; D013320:Strongyloidea / Q000254:growth & development* / Q000502:physiology; D013997:Time Factors