Worm burdens recovered from inbred mice strains, namely C57Bl/6, C57Bl/10,
CBA, BALB/c, DBA/2 and C3H/He, conventionally maintained in two
institutional animal houses in the State of Rio de Janeiro, RJ, Brazil,
were analyzed and compared, regarding their prevalences and mean
intensities. Three parasite species were observed: the nematodes Aspiculuris
tetraptera, Syphacia obvelata and the cestode Vampirolepis nana. A
modification of the anal swab technique is also proposed for the first time
as an auxiliary tool for the detection of oxyurid eggs in mice.