Eosin Methylene Blue Agar (EMB) Is a Selective and Differential

question 41

Multiple Choice

Eosin methylene blue agar (EMB) is a selective and differential medium. The dyes in the medium inhibit most Gram-positive organisms. Gram-negative organisms such as the coliforms grow on this medium. Coliforms that are fecal in origin produce colonies with a metallic green color on EMB, while those that are non-fecal produce colorless colonies. You plate a urine sample onto an EMB plate and incubate it. Metallic green colonies develop. From this, you can conclude that 

• A) the sample contains bacteria that are Gram-negative AND are non-fecal in origin.
• B) the sample contains bacteria that are Gram-negative AND are fecal in origin.
• C) the sample contains bacteria that are Gram-positive AND are fecal in origin.
• D) the bacteria in the colonies are Gram-positive AND are rod-shaped.
• E) normal microbiota in the bladder is fecal in origin AND is aerobic.

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Definitions:

Fetal Distress

A condition in which a fetus is not well or is experiencing stress during pregnancy, often indicated by abnormal heart rate patterns detected during labor.

Birth Complication

Any problem that occurs during the birth process, potentially affecting the health of the mother or child.

Bizarre Delusion

A false belief that is strange, completely implausible, and not rooted in reality, often seen in severe mental disorders.

Concordance Rate

Concordance Rate is a measurement used in genetics and psychology to indicate the likelihood that two individuals, often twins, will both show a particular trait or disorder.