FIG. 1.

Comparative infectivity of P. berghei sporozoites (spz) to immunized CD-1 outbred mice when challenge sporozoites were delivered by either infectious mosquito bite or syringe inoculation into mouse tail vein. Mice were passively immunized with an i.v. injection of dilutions of MAbs Pb 3.28.1 and Pb 3.213 30 min prior to challenge. Blood smears were taken 4 to 9 days after challenge to detect blood-stage parasites.