J.O. Knisley R. M. Kocan 1970 <p><i>Trichomonas gallinae</i>-free pigeons and mourning doves were infected with the Jones' Barn strain of <i>T. gallinae</i> to determine the rate of disease resistant <i>T. gallinae</i>-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.</p> application/pdf 10.7589/0090-3558-6.1.13 en Wildlife Disease Association Challenge infection as a means of determining the rate of disease resistant Trichomonas gallinae-free birds in a population article