The coliform group referred to the aerobic or facultative anaerobic gram-negative budless bacillus.

大肠菌群是指需氧和兼性厌氧的革兰氏阴性无芽孢杆菌。

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Microscopically, a gram stain reveals gram-negative diplococci within a neutrophil, typical for Neisseria meningitidis.

在显微镜下，革兰氏染色显示中性粒细胞内有革兰氏阴性双球菌，这是脑膜炎奈瑟氏球菌的典型特征。

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But now, says the Lancet paper, clinical microbiologists increasingly agree that multidrug-resistant Gram-negative bacteria, which thrive in the gut, pose the greatest risk to public health.

但是该论文指出，现在临床微生物学家日益赞同，活跃于肠道中的多耐药性革兰阴性菌，才对公众健康构成最大威胁。

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Scientists divide bacteria into so-called "gram positive" varieties like Strep, which lack rigid cell walls and can be stained with dye, and "gram negative" ones that have cell walls and aren't dyeable.

FORBES: Bleeding Edge

They tested their treated materials with Staphylococcus aureus and Escherichia coli, the gram-positive and gram-negative bacteria that are always giving humans a bad day.

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There is particular concern about Gram-negative bacteria (like E.coli and K. pneumonia), due to their outer membrane which can prevent some antibiotics from penetrating the cell.

BBC: Action on antibiotics