Some observations on the experimental infection of white mice with toxocara canis

Female white mice were grouped as follows. 42 pregnant, 20 nonpregnant, and 8 monitor nonpregnant females kept with the corresponding males. The three groups were infected with 500 or 1000 infective Toxocara canis ova, either with a single does or two repeated doses with one week interval. Pregnancy occurred in the monitor animals receiving doses of 500. Repeated doses resulted in 100% stillbirth. While with single doses nearly 17% completed the pregnancy to full term and 60% of their off springs showed larvae in the brains. Pregnancy also had an effect on the larval count in the brain which showed a significant decrease