A strain of Plasmodium relictum, isolated from a mourning dove, is being maintained by blood passage through pigeons. Studies concerning the periodicity and synchronicity of this organism indicate the length of the asexual cycle to be 24 hours correlated with a high degree of synchronicity. Segmentation occurs between 5 and 9 PM, with sporulation occurring between 5 AM and 1 PM. The pathogenicity of the strain to pigeons is moderate, with a tendency to kill several days after the crisis of infection has passed. Exoerythryocytic schizonts have been demonstrated in several of the birds that died, with these stages tending to affect the brain more than other organs. Young chickens, inoculated with infected pigeon blood, remained infected from four to ten days. However, duration of infection decreased with an increase in the age of the bird. Parasites did not develop in either six-week old or twelve-week old chickens. The taxonomic position of this particular strain of P. relictum is discussed.
Proceedings of the Iowa Academy of Science
©1962 Iowa Academy of Science, Inc.
Farmer, John N. and Moore, A. Kenneth
"Periodicity and Synchronicity of Plasmodium relictum in the Pigeon,"
Proceedings of the Iowa Academy of Science, 69(1), 636-644.
Available at: https://scholarworks.uni.edu/pias/vol69/iss1/96