Vertical Transmission to Embryo and Fetus in Maternal Infection with Rat Virus (RV).

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  • Vertical Transmission to Embryo and Fet

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The influence of maternal rat virus (RV) infection on rat embryogenesis and fetus was examined by viral reisolation, immunostaining and PCR analysis. Vertical transmission caused by the UT-1 strain of RV depended on the stage of gestation when maternal infection occurred. When females were infected at the pre-mating point, the number of fetuses was smaller than that normally obtained, possibly due to infection at the stage of the hatched blastocyst, but almost all of the fetuses obtained were free from infection and developed normally. The incidence of transplacental infection was the highest when pregnant females were infected in the middle of the gestation stage, and some of the fetuses died. In pregnant females which were infected late in the gestation stage, all fetuses developed normally. Some of them were infected transplacentally and harbored the infectious virus. Much attention should be paid to performing reliable rederivation of RV-infected rat colonies by hysterectomy and embryo transfer.<br>

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  • Experimental Animals

    Experimental Animals 45 (3), 239-244, 1996

    公益社団法人 日本実験動物学会

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