Exam 31: Water and Food As Vehicles of Bacterial Diseases

Not all coliforms are pathogenic.

Legionella pneumophila is generally transmitted by

Flour and sugar are classified as ________ foods.

Coliforms in a water sample indicate ________ contamination.

Which of the following bacterial pathogens is found in aquatic environments and is commonly present in air conditioning systems?

Infection with Legionella pneumophila is usually treated with intravenous erythromycin.

Vibrio cholerae primarily infects the

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

The MOST common route of transmission of Salmonella typhi worldwide is through

When solute is added to food products,the water activity (aw)

Properly canned foods are sterile.

What organisms are good competitors for free water present in foods with low aw?

Clostridium perfringens food poisoning leads to diarrhea,because the

For water to be considered safe to drink,it must be treated with four distinct methods.

Nearly ALL cases of acute listeriosis require hospitalization.

BOTH physical and chemical methods are used to treat and purify water.

Escherichia coli is found naturally in the intestines of birds,humans,and animals.

Treatment of ALL pathogenic E.coli infections involves supportive therapy and,in some cases,may also include antimicrobial drugs.

Why is Staphylococcus aureus often described as an international picnic pest?

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