Which of the following is directly involved in the initiation of dental caries?
A) sucrose
B) lysozyme
C) lactic acid
D) crevicular fluid
E) dentin
Answer: lactic acid
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Microbiology Chapter 25
- 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?
- 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).
- Which of the following is mismatched?
- What is a Dane particle?
- All of the following pertain to pinworm infections EXCEPT
- All of the following are eukaryotic organisms that cause diarrheal disease EXCEPT
- Helicobacter pylori can grow in the stomach because it
- All of the following are gram-negative rods that cause gastroenteritis EXCEPT
- Which of the following pertains to typhoid fever?
- Microscopic examination of a patient's fecal culture shows spiral bacteria. The bacteria probably belong to the genus
- Which of the following is included in GALT?
- A 38-year-old man had onset of fever, chills, nausea, and myalgia while vacationing on the Gulf of Mexico. On April 29, he had eaten raw oysters and gone wading in the warm coastal waters. On May 2, he was admitted to a hospital because of a fever of 39°C and two circular necrotic lesions on the left leg. He had a history of alcoholic liver disease. He was transferred to the ICU; therapy with antibiotics was initiated. On May 4, he died. Which of the following is the most likely cause?
- Which of the following correctly lists the stages of tooth decay?
- The most common mode of HAV transmission is
- Bacterial intoxications differ from bacterial infections of the digestive system in that intoxications
- Which of the following is mismatched?
- Dental plaque is an example of
- Many bacterial infections of the lower digestive tract are treated with
- Epidemics related to bacterial infection of the digestive system are typically caused by
- "Rice water stools" are characteristic of
- Which of the following causes inflammation of the liver?
- Aflatoxin is a(n) ________ associated with ingestion of contaminated ________.
- A vaccine to provide active immunity to HBV is prepared from
- Which of the following organisms is likely to be transmitted via undercooked pork and horse?
- Which of the following organisms is likely to be transmitted via contaminated shrimp?
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