Question

1. Salmonella entericaTyphi is located in the ______________ of chronically infected carriers.
   1. Colon
   2. Large intestine
   3. Small intestine
   4. Gallbladder
2. Which strain of E. coliis the cause of “traveler’s diarrhea?”
   1. Enterophatogenic (EPEC)
   2. Enterotoxigenic (ETEC)
   3. Enterohemorrhagic (EHEC)
   4. Enteroaggregtive (EAEC)
3. Listeria monocytogenesinfection of pregnant women can result in?
   1. Miscarriage
   2. Stillbirth
   3. Premature labor
   4. All of the above
4. The most common source of botulism is…
   1. undercooked meat, poultry, or fish
   2. ready-to-eat meat and unpasteurized dairy
   3. undercooked eggs
   4. improperly home-canned goods
5. TRUE or FALSE: Norovirus can be shed in the feces up to two weeks after symptoms are gone.
   1. True
   2. False
6. One week after returning to the United States after visiting family in India a college student went to the campus health clinic with mild fever, a headache, and general malaise. The doctor prescribed Tylenol and rest. The symptoms did not resolve, and the student returned the clinic a week later with high fever, delirium, abdominal pain, and diarrhea. What is your diagnosis?
   1. Typhoid fever caused by Salmonella enterica typhi
   2. Salmonellosis caused by Salmonella enterica thyphimurium
   3. Cholera caused by Vibrio cholerae
   4. Traveler’s diarrhea caused by Enterotoxigenic E.coli(ETEC)
7. “Rice water” stool is a characteristic symptom of…
   1. E. colifood infection
   2. Typhoid fever
   3. Cholera
   4. Norovirus
8. While visiting her grandparent’s farm a 12-year old girl ate sunny side up eggs and toast for breakfast. The girl had helped her grandma collect the eggs that morning from the chicken coupe. Before super the child started complaining of a headache, chills, vomiting, and diarrhea. The child’s grandma gave her Gatorade, put her in bed to rest, and monitored her closely for the next two days after which her symptoms were gone. The child experienced a mild fever for the next two days but otherwise felt fine. The child most likely had?
   1. Staphylococcal food poisoning caused by Staphylococcus aureus
   2. Salmonellosis caused by Salmonella enterica thyphimurium
   3. “The stomach flu” caused by Clostridium prefringenes
   4. Botulism cased by caused by Clostridium botulinum
9. A 70-year old man was admitted to the hospital for kidney failure and bloody diarrhea. However he did not have a fever, and had not history of renal or kidney issues. He was given supportive care and monitored closely. Unfortunately, due to is age the man did not survive the illness. Upon questioning the family at the hospital the next day. The patient’s granddaughter said her granddad like to have the occasional White Castle burger as a “treat.” What is your diagnosis?
   1. Enterotoxigenic E. coli(ETEC)
   2. Enteropathogenic E. coli(EPEC)
   3. Enterohemorrhagic E. coli(EHEC)
   4. Enteroaggregative E. coli(EAEC)
10. During the Listeria monocytogenesinfectious cycle?
    1. The bacterium survives inside the phagolysosome
    2. The bacterium creates comet-like tails from host actin to propel itself into nearby uninfected cells
    3. Creates an exotoxin that ruptures gastric epithelial cells
11. The best way to prevent foodborne illness is…
    1. Wash hands before and after handling food
    2. Properly cook meat to appropriate temperature
    3. Wash fruits and vegetables
    4. Refrigerate leftover foods ASAP
    5. All of the above
12. Campylobacter food infection results from consuming…
    1. Undercooked poultry or pork
    2. Raw eggs
    3. Unpasteurized milk
    4. Raw shellfish
    5. A and D
13. An exotoxin that acts on the small intestine is called an
    1. Endotoxin
    2. Enterotoxin
    3. Neurotoxin
    4. Alphatoxin

Answer 1

1. Salmonella entericaTyphi is gram-negative bacteria main causative agent of enteric fever (typhoidal fever). It has two serogroups which are typhoidal- typhi and paratyphi. In usual infection colonization if bacteria occur in the intestinal tract but in chronically infected carries bacteria can invade to the gallbladder and

The answer is d) Gallbladder

2. Escherichia coli (E. coli) is usually normal flora in the large intestine. sometimes its different strains acquire virulent properties and produce symptoms  

Enteropathogenic (EPEC) strain can produce diarrhea in the newborn while the Enterotoxigenic (ETEC) strain of E. coli can cause traveler's diarrhea when its toxin irritates intestinal mucosa.  the toxins of Enterohemorrhagic (EHEC) strain can cause bleeding in the digestive tract and produce bloody diarrhea. Enteroaggregative (EAEC) usually cause diarrhea in children

The answer is b) Enterotoxigenic (ETEC)

3. Listeria monocytogenes is a gram-positive bacteria that causes a severe foodborne infection called listeriosis. Infection of Listeria monocytogenes in pregnant women can cause placental dissemination to result in miscarriage, stillbirth, or preterm labor.  Listeria monocytogenes can also cause neonatal sepsis and meningitis

The answer is d) All of the above

4. Clostridium botulinum (C. botulinum) gram-negative anaerobic bacteria and it is the causative agent for serious neurological illness called botulism. It produces a neurotoxin called and produces this disorder. Toxins are formed when foods are improperly canned at home

The answer is d) improperly home-canned goods