Bacteria that thrive in a low pH, like mutans streptococci and Lactobacillus, begin to dominate.

适宜在低pH值环境中生存的菌，例如变形链球菌和乳酸杆菌，将会占据位。

The vast majority of these are caused by the streptococcus pneumoniae.

其中绝大部分是由肺炎链球菌引起的。

Common bacterial causes include Group A streptococcus, Streptococcus pneumoniae, or Haemophilus influenzae.

常见的致病菌包括A组链球菌、铜绿假单胞菌、流感嗜血杆菌。

In adults, bacterial causes include streptococcus pneumoniae, haemophilus influenzae, and staphylococcus aureus.

成人菌性肺炎的病因包括肺炎链球菌、流感嗜血杆菌和金黄色葡萄球菌。

In newborns, the most common causes are Group B streptococci, E coli, and Listeria monocytogenes.

在新生儿中，最常见的原因是B族链球菌、大肠杆菌与单核胞增多性李斯特菌。

So right here they're using streptococcus pneumoniae, they're taking one type of that.

所以就在这里，他使用的是肺炎链球菌，他服用的是其中的一种。

They'd then inject a different type of that streptococcus, a virulent type.

然后他会注射另一种类型的链球菌，一种毒性较强的链球菌。

He then took this evil smooth strain of streptococcus.

然后他服用了这种邪恶的平滑链球菌菌株。

We can use this to differentiate Staph saprophyticus from other gram positive cocci, like streptococci and enterococci, which are catalase negative.

以利用这一特性来区分腐生葡萄球菌和其他革兰氏阳性球菌，如链球菌和肠球菌这一类过氧化氢酶阴性的菌。

Mutans streptococci are resistant to this acid, but unfortunately, our teeth aren't.

变形链球菌能耐受这种酸，但不幸的是，的牙齿却不能。

Well, that doesn't  sound so good, streptococcus.

罗伯特：嗯，链球菌，这听起来不太好。

We're seeing a lot more invasive streptococcus out there.

发现周围侵袭性链球菌感染的情况明显增多。

The major genera with the largest representation in the oral cavities include: streptococcus, prevotella, haemophilus, rothia, veillonella, neisseria, fusobacterium, and porphyromonas.

口腔中的微生物要包括以下几个大属：链球菌属、普氏菌属、嗜血杆菌属、罗氏菌属、韦荣氏球菌属、奈瑟氏菌属、梭杆菌属与卟啉单胞菌属。

Diets high in sugary foods cause an explosion of bacteria called mutans streptococci in our mouths.

高糖食品的饮食习惯会致口腔内一种名为变形链球菌的菌大量繁殖。

Normally, there's a layer called the pellicle that covers the tooth, and bacteria in the mouth, like viridans group streptococci, settle on that pellicle layer.

正常情况下，牙齿被薄膜包裹，口腔中的菌，例如草绿色链球菌，定植在这层薄膜上。

That environment favors bacteria like mutans streptococci and Lactobacillus, which demineralize enamel and the dentin beneath it, and if untreated, it can eventually result in a cavitated caries lesion.

酸性环境下的优势菌例如变形链球菌和乳酸杆菌，以食牙釉质及其下层的牙本质脱矿，如果不加以治疗，最终会形成空洞型龋齿。

You might have a lobar pneumonia, for example, and they could give you an antiserum, an injection of rabid antibodies to the bacterium streptococcus, if the intern sub-typed it correctly.

比如说，你患有大叶性肺炎，医生以对你进行抗血清治疗，为你注射狂犬病抗体以此对抗链球菌，前提是实习医生分类正确。

However, moderate consumption of red wine may enhance oral health, because it contains a mixture of organic acids that are active against oral streptococci responsible for caries development and streptococcus pyogenes responsible for pharyngitis.

不过，适量饮用红葡萄酒能会增进口腔健康，因为红葡萄酒中含有一种有机酸混合物以有效抑制致龋齿的口腔链球菌属以及致咽炎的化脓性链球菌。

One of the bad bacteria, streptococcus mutans, that can proliferate in the mouth, especially after eating sugary foods, can make it through the blood-brain barrier, and maybe it's thought one of the causes of dementia can disrupt

一种有害菌——变形链球菌，以在口腔中繁殖， 尤其是在食用含糖食物后，它以穿过血脑屏障，能被认为是致痴呆的原因之一， 并对其产生干扰。