[Effect of fosfomycin-calcium on reproductive performance of rat and rabbit: teratogenicity test (author's transl)].

The teratogenicity study of fosfomycin-Ca (FOM-Ca) was undertaken in Wistar strain rats and JW strain rabbits. Rats were treated orally at dose levels of 140,700 and 1,400 mg/kg/day from 7th to 17th day of gestation, and rabbits were treated orally at dose levels of 80, 140 and 420 mg/kg/day from 6th to 18th day of gestation. In the case of rats, two-thirds of pregnant mothers in each group were sacrificed on 20th day of gestation and then their fetuses were examined for external, visceral and skeletal observation. The remaining mothers were allowed to deliver naturally, and then their offsprings were examined for postnatal development. In the case of rabbits, all pregnant mothers were sacrificed on 29th day of gestation and their fetuses were examined. No effect of FOM-Ca treatment to rat and rabbit mothers was found except soft stool was seen with maximum dose in rats. Dead or resorbed rate of fetuses increased, external anomalies (short tail, abdominal hernia) were found and skeletal anomalies slight increased with maximum dose in rats. However, there was no significant difference from the control or background data. While, no effect of FOM-Ca treatment was observed in rabbits and rat offsprings. Consequently, it can be concluded that FOM-Ca has no teratogenicity effects on rats and rabbits.