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.
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1 January 1970
Challenge Infection as a Means of Determining the Rate of Disease Resistant Trichomonas Gallinae-Free Birds in a Population
R. M. KOCAN,
J. O. KNISLEY