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，例如变形链球和乳酸，将会占据主导地位。

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

其中绝大部分是由肺炎链球引起的。

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

常见的致病包括A组链球、铜绿假单胞、流感嗜血。

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

成人肺炎的病因包括肺炎链球、流感嗜血和金黄色葡萄球。

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、大肠单核胞增斯特。

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

所以就在这里，他们使用的是肺炎链球，他们服用的是其中的一种。

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

然后他们会注射另一种类型的链球，一种毒较强的链球。

He then took this evil smooth strain of streptococcus.

然后他服用了这种邪恶的平滑链球株。

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

我们可以利用这一特来区分腐生葡萄球和其他革兰氏阳球，如链球和肠球这一类过氧化氢酶阴的。

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

变形链球能耐受这种酸，但不幸的是，我们的牙齿却不能。

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

罗伯特：嗯，链球，这听起来不太好。

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

我们发现周围侵袭链球感染的情况明显增。

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

口腔中的微生物主要包括以下几个大属：链球属、普氏属、嗜血属、罗氏属、韦荣氏球属、奈瑟氏属、梭属卟啉单胞属。

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导致我们口腔内一种名为变形链球的大量繁殖。

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，例如草绿色链球，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.

酸环境下的优势例如变形链球和乳酸，可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，你患有大叶肺炎，医生可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，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，适量饮用红葡萄酒可能会增进口腔健康，因为红葡萄酒中含有一种有机酸混合物可以有效抑制导致龋齿的口腔链球属以及导致咽炎的化脓链球。

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——变形链球，可以在口腔中繁殖， 尤其是在食用含糖食物后，它可以穿过血脑屏障，可能被认为是导致痴呆的原因之一， 并对其产生干扰。