title: Challenge infection as a means of determining the rate of disease resistant Trichomonas gallinae-free birds in a population.
abstract: Trichomonas gallinae-free pigeons and mourning doves were infected with the Jones' Barn strain of T. gallinae to determine the rate of disease resistant T. gallinae-free birds in each population. Although all birds became infected 88% of the pigeons were resistant to trichomoniasis while 82% of the mourning doves were resistant. It was concluded that these birds had been previously infected and spontaneously lost their trichomonad fauna while retaining their resistance to fatal infection.
authors.affiliation: Patuxent Wildlife Research Center, Laurel, MD 20810, USA.
authors.forename: R M
authors.initials: RM
authors.lastname: Kocan
authors.forename: J O
authors.initials: JO
authors.lastname: Knisley
mesh_terms: D000818:Animals; D001715:Bird Diseases / Q000276:immunology* / Q000469:parasitology; D010856:Columbidae / Q000276:immunology / Q000469:parasitology*; D004198:Disease Susceptibility / Q000662:veterinary; D007113:Immunity, Innate; D014244:Trichomonas / Q000276:immunology* / Q000472:pathogenicity; D014245:Trichomonas Infections / Q000276:immunology / Q000662:veterinary*; D014774:Virulence