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

常见的致病细菌包括A组链球菌、铜绿假单胞菌、流感嗜血杆菌。

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、大肠杆菌与单核细胞增多性李斯特菌。

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

某些微生物会过度孳长而导致蛀牙吃了高度含糖的食物。

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。

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

成人细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。

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

适宜在低pH值环境中生存的细菌，例如变形链球菌和乳酸杆菌，将会占据主导地位。

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细菌。

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。

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，口腔中的细菌，例如草绿色链球菌，定植在这层薄膜上。

Streptococci is one of the most common bacteria found in our mouth and it's normally not harmful until it metabolizes sugar or protein from food debris.

链球菌是我们口腔中最常见的细菌之一，通常无害，直到它从食物残渣中代谢糖或蛋白质。