It was shown in previous paper (1932) that rats which had not previously been infected became immune to Einzcria. miya.irii after recovery from an infection produced by ingesting 1500 oocysts daily for five days. It was also stated that in the passing of the weeks some of the immunity was lost. The latter statement was based upon an experiment with four rats which showed the last coccidia on September 25, 1931, and which could not be reinfected immediately, but which again became infected after ingesting large numbers of oocysts on December 12, 1931, - about 78 days after the last oocysts of the first infection were eliminated.
Proceedings of the Iowa Academy of Science
©1933 Iowa Academy of Science, Inc.
Becker, E. R. and Hall, Phoebe R.
"Reinfection of Rats with Eimeria miyairii after Immunization,"
Proceedings of the Iowa Academy of Science, 40(1), 239-240.
Available at: https://scholarworks.uni.edu/pias/vol40/iss1/139