Mosquito Transfer of the Pigeon Strain of Plasmodium Relictum

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Abstract
When the pigeon strain of P. relictum is transferred to canaries by blood inoculation, it produces high infections and is readily transmitted from one canary to another by Culex pipiens. These mosquitoes failed to transmit this parasite from canary to pigeon, from pigeon to pigeon, or from pigeon to canary. Injns. of sporozoites failed to produce infections in pigeons, but this method was 100% infective for canaries. Following mosquito transfer the parasites failed to produce infections in pigeons when exceedingly large numbers were injected from an infected canary. Also 2 squabs and 2 day-old chicks were injected, but no infections resulted. Aedes aegypti failed to transmit the strain to either canaries or pigeons. The original strain in the pigeon has been designated the IP strain, after blood transfer into canaries it has been designated the 1P1 strain and after mosquito transfer it has been designated the 1P1-1 strain of P. relictum.

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