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bacteria against gram-positive bacteria .In addition, EMB agar is useful in isolation and differentiation of the various gram- negative bacilli and enteric bacilli, generally known as coliforms and fecal coliforms respectively The bacteria which ferment lactose in the medium form colored colonies, while those that do not ferment lactose appear as colorless colonies EMB agar is used in water quality tests to distinguish coliforms and粪便大肠菌群在水样中表明可能的致病微生物污染。EMB琼脂还用于区分结肠型 - 肾小球 - 衰弱组中的生物：埃切利希菌大肠菌菌落具有绿色的金属光泽，并带有黑暗的中心。
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