More than 25 human samples have proved positive for Rift Valley fever by PCR or ELISA testing.

通过聚合链反应或ELISA酶标法测试，共有超过25例人类样本被证实为裂谷热阳性。

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Elisa Odabashian, the director of the West Coast office of Consumers Union, said the government's testing program is not sufficient to ensure that U.S. beef is safe.

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