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RH tachyzoite infection inhibits chicken embryo growth in a dose-dependent manner. Groups of day 12 eggs (n = 4) were injected intravenously with 103 (bar 3), 104 (bar 4), or 105 (bar 5) RH tachyzoites or with phosphate-buffered saline alone (Control). On day 18, the embryos were sacrificed and weighed. The values are means ± standard errors.
