mcb ch 25 – Flashcard

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question
Which of the following NOT true for both hepatitis B and hepatitis C infection?
answer
no vaccine
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What do hepatitis A and hepatitis B have in common?
answer
both have a vaccine
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What organ is most affected by hepatitis B virus?
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liver
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Vaccines can be used to protect at-risk individuals from all of the following liver diseases EXCEPT __________.
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hep C
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Part A Choose the FALSE statement from those listed below.
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intenstinal gas includes oxygen
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John went to a picnic. He took some leftover chicken and rice home, heated it on the stove, ate it, and got sick two hours later. John thought the heating made his food safe because it would have killed any bacteria present. He didn't know that __________ produces a heat-stable toxin.
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staph aureus
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A patient exhibits hemorrhagic colitis and is treated via intravenous rehydration. The pathogen is a gram-negative rod. It is isolated and differentiated from related organisms based on its inability to ferment sorbitol. Which of the following is a likely diagnosis?
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e. coli
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Bacteria present in the __________ can be phagocytosed by Paneth cells.
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small intestine
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Which of the following statements concerning mumps virus infection is FALSE?
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testes can become inflamed 2-3 weeks
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H. pylori is able to survive the acidic environment of the stomach as a result of adaptations that allow it to increase the pH of the immediate environment.
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true
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Gastroenteritis due to ingestion of food contaminated with Staphylococcus aureus is due to intoxication by enterotoxins.
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true
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Lactic acid, an end product of fructose fermentation, causes breakdown of tooth enamel and, eventually, cavities.
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true
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Aflatoxin poisoning is associated with liver cancer.
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true
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An outbreak of viral gastroenteritis occurs in a pediatrics ward. Rotavirus is the most likely causative age
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true
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Campylobacter gastroenteritis is the leading cause of foodborne illness in the United States.
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true
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What is a Dane particle?
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infection viron causing HBV
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Helicobacter pylori can grow in the stomach because it
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posesses enzyme that neturalizes hcl
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All of the following are gram-negative rods that cause gastroenteritis EXCEPT
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clostridium
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Microscopic examination of a patient's fecal culture shows spiral bacteria. The bacteria probably belong to the genus
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campylobacer jejnui
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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?
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vibrio vulfunicis
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Which of the following correctly lists the stages of tooth decay?
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plaque accumulation, destruction of enamel, advancement of decay through enamel, decay in dentin, decay in tooth pulp
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The most common mode of HAV transmission is
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food prep
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Bacterial intoxications differ from bacterial infections of the digestive system in that intoxications
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shorter incubation times
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Dental plaque is an example of
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biofilm
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Many bacterial infections of the lower digestive tract are treated with
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water and electrolytes
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Epidemics related to bacterial infection of the digestive system are typically caused by
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contaminated food and water
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"Rice water stools" are characteristic of
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cholera
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A vaccine to provide active immunity to HBV is prepared from
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modified yeast
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Which of the following organisms is likely to be transmitted via contaminated shrimp?
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vibrio p
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Thorough cooking of food will prevent all of the following EXCEPT
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staph
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Most of the normal microbiota of the digestive system are found in the
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small and large intestine
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Acute gastroenteritis that occurs after an incubation period of two to three days and commonly affects children is probably caused by
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rotavirus
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The most common cause of traveler's diarrhea is
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e coli
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Which of the following statements about staphylococcal food poisoning is FALSE?
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heating will prevent it
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Poultry products are a likely source of infection by
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samonella
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Which of the following diseases of the gastrointestinal system is transmitted by the respiratory route?
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mumps
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Disease-causing exotoxins are produced by all of the following organisms EXCEPT
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shigella
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Which of the following statements about salmonellosis is FALSE?
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morality rate is highClostridium difficile-associated diarrhea is usually preceded by
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Clostridium difficile-associated diarrhea is usually preceded by
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extended anti biotic use
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