Toxoplasmosis is a protozoan infection of toxoplasma gondii. There were several ano￢malies of the fetus, abortion and premature labor by this infection during human pregn￢ancy. This study was carried out to know the effects of this infection to the chick
embryos.
The results were as follows:
1. In the preliminary experiments, the 7th day chick embryos were all dead after Toxoplasma inoculation regardless of the number of organism.
2. In the main experiments, death of chick embryos during the developmental stages were increased in proportion to the dosage of Toxoplasma.
3. The numbers of alive chick embryos were decreased in proportion to the age of the embryo in the Toxoplasma 1, 000-10, 000 inoculated groups from the 13th day to 16th day experiments, but no relation among the Toxoplasma 100-500 inoculated groups.
4. Among the abnormal chickens due to Toplasmosis, author observed 4 anal prolapses (2.4%), 32 leg anomalies (19%) and one chicken with agensis of the left eye and twisted beak.
5. Chickens with leg anomalies were observed most frequently in the 15th day experi￢ment by 14/36 (39%) chickens.
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