Experimental infection of timed-pregnant rhesus monkeys with simian immunodeficiency virus (SIV) during early, middle, and late gestation.
1990
Ten rhesus monkeys were inoculated with SIV/DeltaB670 during various stages of gestation to determine factors predictive of transplacental infection. Two abortions associated with rapid disease occurred shortly after infection; uninfected infants were caesarean delivered from eight other females. SIV-specific RNA accompanied by deciduitis was identified in the maternal portion of two placentas suggesting that opportunistic infections may promote entry of SIV into placental tissue. The lack of evidence for SIV infection of caesarean delivered infants suggests that fetal infection may often occur during parturition.
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