Exam 32: Waterborne and Foodborne Bacterial and Viral Diseases

The principle behind salt or sugar preservation is to

Legionella pneumophila is generally transmitted by

The critical step in making water safe to drink is chlorination.

Staphylococcus aureus is a common causative agent of foodborne disease because it

Vibrio cholerae primarily infects the

With Clostridium perfringens, the enterotoxin is present in the endospores that germinate under anoxic conditions.

The Staphylococcus aureus toxins are

Not all coliforms are pathogenic.

Coliforms in a water sample indicate ________ contamination.

What is the medium used in the membrane filter (MF) procedure to differentiate fecal coliforms and Escherichia coli?

Explain why coliforms are used to detect water contamination rather than directly quantifying individual pathogens such as Vibrio cholerae or Salmonella spp.

For much of the period of microbial growth in food, there is no visible or easily detectable change in food quality.

most wastewater treatment facilities employ methods designed to detect each pathogenic organism that may be present in a given sample.

Which U.S. government agency monitors water utility reports?

Irradiation of food uses

Properly canned foods typically do not contain living vegetative cells.

How does Clostridium perfringens cause food poisoning? How is this process related to the metabolism and special structures of C. perfringens?

We are technically in the midst of a cholera pandemic.

Invasive listeriosis is often treated with antibiotics such as penicillin.

Listeriosis is diagnosed from ________ cultures and treated with ________.