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Bacterial Pollution (Coliform): Student Laboratory Kit

By: The Flinn Staff

In the Bacterial Pollution (Coliform) Laboratory Kit for microbiology, determine the presence or absence of coliform bacteria in water supplies. Observe a dramatic color change to do so.

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Students will determine the presence or absence of coliform bacteria (indicative of the presence of untreated sewage and potentially pathogenic bacteria) in water supplies. By observing a dramatic color change that occurs in a lactose broth medium, students will determine whether coliforms are present. Kit includes tubes of lactose broth medium with chlorophenol red indicator, sterile transfer pipets and instructions.