Embryo transfer as a means of controlling the transmission of viral infections. XIII. Failure to transmit foot-and-mouth disease virus through the transfer of embryos from viremic donors.
A total of 436 embryos/unfertilized ova was collected from 30 foot-and-mouth disease (FMD) viremic cattle; 106 of these embryos/ova were from eight donors that had FMD virus in their reproductive tracts. The 436 embryos/ova were washed and then either assayed in cell culture or intradermally in steer tongues or transferred to recipients. Foot-and-mouth infectivity was not found to be associated with any of the embryos/ova assayed in cell culture or intradermally. The 149 embryos transferred produced two abortions, five sets of twins born prematurely, and 15 normal calves. All of the recipients and all of the calves remained FMD-seronegative.
Mebus
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United States Department of Agriculture, Agricultural Research Service Plum Island Animal Disease Center P. O. Box 848, Greenport, NY 11944, USA.
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