Exam 31: Water and Food As Vehicles of Bacterial Diseases

The U.S.Environmental Protection Agency (EPA)regulates the concentration of Escherichia coli in public recreational waters as well as private swimming pools,spas,and hot tubs to minimize waterborne disease outbreaks.

The MOST important potential common source of infectious disease is

What is the difference between food poisoning and food infection? Are antibiotics useful in either of them?

As a visitor to a country in which cholera is an endemic disease,what specific steps would you take to reduce your risk of cholera exposure? Will these precautions also prevent you from contracting other waterborne diseases? If so,which ones? Identify waterborne diseases for which your precautions may not prevent infection.

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

Which items are MOST routinely irradiated in the United States?

The MOST common source of individual foodborne botulism outbreaks are due to consumption of

Why are enteric bacteria such as Escherichia coli common meat contaminants?

The degree of susceptibility a food has to microbial activity is determined by its

Campylobacter infections are the MOST common foodborne infections in the United States.

Listeriosis is diagnosed from ________ cultures and treated with ________.

The Campylobacter spp.are

At what temperature are most household freezers kept?

Psychrotolerant microorganisms can survive and grow at

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

Typhoid fever has been virtually (although not completely)eliminated from developed countries.

Salmonellosis is most frequently caused by

It is estimated that less than 4% of all cases of salmonellosis are reported.

What makes Listeria monocytogenes an especially difficult-to-prevent foodborne pathogen? Once in the human body,how does it evade the immune system?

We are technically in the midst of a cholera pandemic.