Respuesta :
A bacterial sample was grown on eosin methylene blue (emb) agar. then we can you conclude based on your observations that bacteria is Gram-negative bacteria.
- Eosin- methylene blue agar is picky for gram-negative bacteria against gram-positive bacteria. In addition, EMB agar is useful in segregation and isolation of the varicoloured gram-negative bacilli and enteric bacilli, generally known as coliforms and faecal coliforms individually. The bacteria which brew lactose in the medium form coloured colonies, while those that don't brew lactose appear as uncoloured colonies.
- Eosin- methylene blue agar is used in water quality tests to distinguish coliforms and fecal coliforms that gesture possible pathogenic microorganism Impurity in water samples. EMB agar is also used to distinguish the organisms in the colon- typhoid- dysentery group Escherichia coli colonies grow with a metallic shine with a dark centre, Aerobacter aerogenes colonies have a brown centre, and no lactose- brewing gram-negative bacteria appear pink
To learn more about gram-negative bacteria.
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