细菌侵入牙齿周围软组织并使其感染后造成牙龈炎。
Gingivitis comes from bacteria that get into the soft gum tissue and infect it.
皮肤炭疽病：细菌侵入皮肤伤口，便会感染这种疾病。
Cutaneous anthrax: Occurs when the bacterium enters skin wounds.
注意，蛋黄带血的为孵过的蛋，蛋壳破损的会有细菌侵入滋长，均不宜购买。
Warning: Eggs contain yolks with blood are hatched ones, and those with broken shell are apt to be invaded by germs, so they shall not be purchased.
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