A Physician Sends a Stool Sample to Your Lab,and Wants

question 10

Multiple Choice

A physician sends a stool sample to your lab,and wants to know if there are lactose fermenting microbes in the sample.How might you determine if these microbes are present or not from this mixed-microbe specimen?

• A)Streak the sample for isolation on Thayer-Martin agar (which contains lactose and particular antibiotics for selectivity).
• B)Streak the sample for isolation on a blood agar plate (which contains lactose AND red blood cells that enrich the culture for iron).
• C)Streak the sample for isolation on a MacConkey agar plate (which contains lactose and a pH indicator that turns pink when acid byproducts are present).
• D)None of the above would work-there's no way to reliably determine this feature from the specimen given.

---

Definitions:

Transactional Analysis

A psychotherapeutic approach that examines interactions and transactions between people to understand their communication and behavior.

Telehealth

The delivery of health-related services and information via telecommunication technologies to support long-distance clinical health care and patient education.

Electronic Means

Methods or processes that involve the use of electronic devices or systems, such as computers or the internet.

Cognitive Therapies

Therapeutic approaches that focus on changing people’s maladaptive thought patterns.