因为除人类以外，弓形虫还有两个常规寄主：啮齿目动物与猫科动物。
For, besides humans, Toxoplasma has two normal hosts: rodents and cats.
Kalin说，这不奇怪，因为啮齿类动物和人类在面临紧张情况时他们这两个脑部区域活动也会加速。
That's not surprising, Kalin says, because studies with rodents and humans have suggested that both regions rev up during anxiety-provoking situations.
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