UnlikeClostridium botulinum,anorovirus:
A) produces enteric toxin.
B) produces preformed toxin.
C) rarely causes disease outbreaks.
D) causes pneumonia.
Q. 2Which of the following is an example of norovirus infection?
A) Savio suffers from abdominal discomfort and diarrhea two weeks after ingestion of contaminated food.
B) Andr suffers from nausea, vomiting, and abdominal cramping two days after ingestion of contaminated food.
C) Julia is diagnosed with liver damage and cancer eight months after ingestion of contaminated food.
D) Victoria suffers from paralysis 36 hours after ingestion of contaminated food.
Q. 3Chang Lee, an eight-year-old boy, eats steak at a restaurant. Two days later, he develops fever, throws up anything he consumes, and suffers from abdominal pain. Clinical diagnosis shows that Chang Lee is affected by food poisoning because the steak he ate was contaminated. The two days' time period between Chang Lee's consuming the steak and the emergence of his sickness is called the _____.
A) refractory period
B) gestation period
C) transition period
D) incubation period
Q. 4Dichloro-diphenyltrichloroethane (DDT) was banned in the United States in 1972 because:
A) it was found to destroy crops.
B) it was found to help mosquito breeding.
C) it was found to decrease crop yields.
D) it was found to damage wildlife.
Q. 5Which of the following is true of methicillin-resistantStaphylococcus aureus(MRSA)?
A) It is the most common food contaminant in the United States.
B) It is not a causative agent for food poisoning.
C) MRSA infection spreads through direct eye contact with an infected person.
D) MRSA infection cannot be treated effectively by antibiotics.
Q. 6Which of the following is true ofStaphylococcus aureus(S. aureus)?
A) The symptoms of its contamination appear after three to five days in humans.
B) It contaminates foods such as raw and undercooked meat and poultry.
C) Severe rashes appear when it comes in contact with the skin of animals.
D) It releases a toxin called aflatoxin after entering the human digestive system.
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