Replace your brush every three to four months, sooner if it's frayed, and right after you've had a cold, flu, mouth infection or sore throat.

每三至四个月更换你的牙刷，牙刷有磨损的话就早点换，如有伤风，感冒，口腔感染或咽喉肿痛的话也应立即更换牙刷。

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"Some are defanged in the most unprofessional way. they suffer from mouth infection and their poison gland is punctured. we have kept them under medical observation," she told reporters.

她告诉记者说：“一些蛇被拔去毒牙，方法当然是最不专业的，并且会因此而口腔感染。”它们的毒腺往往也被刺破。目前我们一直在对它们进行医疗观察。

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If these germs are alive, something she has not yet confirmed, just handling cigarettes or putting an unlit one to the mouth could be enough to cause an infection.

现在她的研究认为这有很大的可能性。她还没有证实这些细菌是否还存活，但是拿着香烟或者将未点燃的香烟放在嘴里就足够可能带来感染。

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Infection can spread through touching an infected surface and then touching your eyes, nose or mouth.

VOA: special.2009.07.14

They gave them the chemical compound by mouth and say the infection disappeared.

VOA: special.2010.04.07

What to watch for: Upset stomach, cough, dizziness, drowsiness, ear pain or infection, swelling of the mouth or throat.

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But just one diarrhea accident can cause an infection for anyone who gets a mouth full of pool water.

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To prevent infection, scientists suggest basic hygiene: Keep your hands away from your eyes, nose and mouth, and wash your hands often.

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