LACK OF VERTICAL TRANSMISSION WITH BAYLISASCARIS-TRANSFUGA LARVAE IN MICE

We tested the transfer of Baylisascaris transfuga larvae in mice from mothers to their progeny. Mice were orally infected with 3000 B. trans fuga embryonated eggs on days 7, 14 or 18 of pregnancy. Larvae were no t found by digestion and Baermann examination of entire bodies of 15-d ay-old young mice born to the infected mothers and either suckled on t hem. These results suggest that transplacental and transmammary transm ission of larvae of the parasite does not ordinarily occur in mice.