Question

A patron with definite open sores or a parasitic infestation shall be served only if:

Answer 1

A patron with open sores or a parasitic infestation should be served only if certain conditions are met, including the absence of the causative agent in healthy individuals, the ability to isolate and grow the suspected pathogen in pure culture, and the development of the same signs and symptoms in a healthy test subject.

Step-by-step explanation:

According to the information provided, a patron with definite open sores or a parasitic infestation should be served only if certain conditions are met. These conditions are:

1. The suspected causative agent must be absent from all healthy organisms but present in all diseased organisms.
2. The suspected pathogen can be isolated and grown in pure culture.
3. A healthy test subject infected with the suspected pathogen must develop the same signs and symptoms of disease as seen in postulate 1.

These conditions ensure that the patron's condition is indeed caused by the open sores or parasitic infestation and not by another factor. They help protect the health of the public and prevent further spread of the disease.