The aim of this research was to study the gastrointestinal parasitism in 12 adult owls kept in captivity in the Southern region
of Brazil. Cloacal contents of the species
Rhinoptynx clamator,
Tyto alba,
Athene cunicularia,
Megascops spp., and
Bubo virginianus were evaluated. Feces and urine were collected and analyzed by the zinc sulfate centrifugal-flotation method and stained
by the modified Ziehl–Neelsen technique. Eggs of
Capillaria spp. and Strongylida, oocysts of
Cryptosporidium spp.,
Eimeria spp., and
Isospora spp. were observed. The birds showed no clinical signs, probably due to the mild nature of the infection.