The relative risks shown in Table 25.1 were calculated for foods suspected of transmitting Salmonella. Which food is the most likely source of infection?

The relative risks shown in Table 25.1 were calculated for foods suspected of transmitting Salmonella. Which food is the most likely source of infection?

A) black beans
B) corn soup
C) jalapeño peppers
D) roma tomatoes
E) The answer cannot be determined based on the information provided


Answer: jalapeño peppers

Following a county fair, 160 persons complained of gastrointestinal symptoms. Symptoms included diarrhea (84 percent), abdominal cramps (96 percent), nausea (84 percent), vomiting (82 percent), body aches (50 percent), fever (60 percent; median body temperature = 38.3°C); median duration of illness 6 days (range 10 hr to 13 days).

Following a county fair, 160 persons complained of gastrointestinal symptoms. Symptoms included diarrhea (84 percent), abdominal cramps (96 percent), nausea (84 percent), vomiting (82 percent), body aches (50 percent), fever (60 percent; median body temperature = 38.3°C); median duration of illness 6 days (range 10 hr to 13 days).

In Situation 25.1, fecal samples should be cultured for all of the following EXCEPT

A) Salmonella enterica.
B) Shigella spp.
C) Campylobacter jejuni.
D) enteropathogenic Escherichia coli.
E) Giardia lamblia


Answer: Giardia lamblia

In Situation 25.1, fecal samples were found to be negative when cultured. The next step in diagnosing the cause of illness would be

A) to begin antibiotic therapy.
B) blood cultures.
C) microscopic examination of feces for oocysts.
D) microscopic examination of feces for viruses.
E) muscle biopsy.


Answer: microscopic examination of feces for oocysts

Which of the following is mismatched?

Which of the following is mismatched?

A) beef — E. coli O157:H7
B) custard and cream pies — Staphylococcus aureus
C) eggs — Trichinella spiralis
D) chicken — Campylobacter jejuni
E) oysters — Vibrio parahaemolyticus


Answer: eggs - trichinella spiralis

What is a Dane particle?

What is a Dane particle?

A) the chlorine-resistant virus that causes HAV
B) the infectious virion that causes HBV
C) the spherical particles found in serum of patients with HBV
D) the filamentous particles that cause HAV
E) another name for an HBV surface antigen


Answer: the infectious virion that causes HBV