Question 1

WASH initiatives are public health initiatives that address WAter,Sanitation,and Hygiene.Which of the following diseases would not be expected to show a decrease in prevalence following a successful WASH campaign?

Accepted Answer

A)   Ascaris lumbricoides infection
B)   Entamoeba infection
C)   Schistosomiasis
D)   Clostridium difficile infection
E)   Shigella infectionF) None of the above
G) All of the above

Question 2

A common food intoxication is caused by enterotoxin-producing strains of ______.

Accepted Answer

A)   Streptococcus pyogenes
B)   Staphylococcus saprophyticus
C)   Streptococcus agalactiae
D)   Staphylococcus aureus
E)   Staphylococcus epidermidisF) D) and E)
G) B) and C)

Question 3

The virulence of Vibrio cholerae is due to its ______.

Accepted Answer

A)   neurotoxin
B)   invasive enzymes
C)   enterotoxin
D)   capsuleE) C) and D)
F) A) and D)

Question 4

Which of the following statements regarding Campylobacter jejuni is incorrect?

Accepted Answer

A)   It causes fever and a watery to bloody diarrhea.
B)   It produces an enterotoxin that stimulates diarrhea.
C)   It infects the stomach.
D)   It is transmitted through ingestion of contaminated chicken, meat, milk, or water.
E)   The cells are gram-negative, curved rods with darting motility.F) A) and E)
G) A) and B)

Question 5

Which of the following helminths is correctly paired with its portal of entry?

Accepted Answer

A)   Schistomoma species - carried by an insect vector into human
B)   Ascaris lumbricoides - enters through the skin
C)   Taenia solium - eggs or larvae can be ingested
D)   Enterobius vermicularis - sexual transmissionE) A) and D)
F) A) and C)

Question 6

The fact that Salmonella has a high ID50 means that

Accepted Answer

A)   it is more pathogenic than 50% of all gut microbes.
B)   an antibiotic dose of 50 g/ml can be expected to kill the organism.
C)   consuming just a few cells of Salmonella will not result in illness.
D)   the most stringent decontamination measures must be used in food preparation facilities.E) B) and C)
F) All of the above

Question 7

Which of the following is not true of schistosomiasis?

Accepted Answer

A)   Schistosomiasis covers its outer surface with blood proteins to escape detection by the immune system.
B)   Schistosomiasis is caused by blood flukes.
C)   Schisotosomiasis cases are beginning to appear in the southern U.S., as climate change brings warming waters to the region.
D)   Larvae called cercariae can penetrate intact skin through hair follicles.
E)   Freshwater snails are the intermediate host.F) A) and C)
G) B) and D)

Question 8

GALT refers to

Accepted Answer

A)   defenses of the GI tract: Gut microbes, Adenoids, Lysozyme, Tonsils.
B)   Gut-Associated Lymphoid Tissue.
C)   Gingival Adhesive Labile Toxin, a virulence factor for gingivitis.
D)   sterile organs of the GI tract: Gingiva, Appendix, Large intestine, Tonsils.E) A) and B)
F) B) and D)

Question 9

It is now past the normal dinner time,but you do not even want to think about food.Only diarrhea,abdominal cramps,and vomiting are on your mind.This all started a few hours ago after having a ham sandwich for lunch purchased from a street vendor.With your microbiology knowledge,you surmise that it is a Staphylococcus aureus-related disorder.Why do you think this?

Accepted Answer

A)   Staphylococcus aureus is the most common cause of gastrointestinal disease.
B)   The toxin produced by Staphylococcus aureus was already in the ham, so the symptoms can occur quickly.
C)   Ham is notorious for being contaminated with Staphylococcus aureus bacteria.
D)   Only Staphylococcus aureus infection causes vomiting, along with cramps and diarrhea.E) None of the above
F) A) and B)

Question 10

Which of the following is not a normal causative agent of acute diarrhea with vomiting (food poisoning) ?

Accepted Answer

A)   Clostridium perfringens
B)   Staphylococcus aureus
C)   Bacillus cereus
D)   Clostridium difficileE) A) and C)
F) B) and C)

Question 11

Trichinella species spend their entire life within the body of a mammalian host,but can move from one species to another upon consumption of an infected animal.Which of the following statements regarding trichinosis is incorrect?

Accepted Answer

A)   An important hazard of consuming roadkill meats is the potential presence of Trichinella cysts.
B)  Ground pork is safe, as the grinding process both inactivates the Trichinella cysts and mixes it with meats from multiple animals, effectively diluting any remaining cysts.
C)  Affected muscle tissue has multiple cysts. Upon consumption, this generates a population that includes both males and females for the infection to propagate.
D)   Venison (deer)  is safe from trichinosis because deer are herbivores not carnivores.E) None of the above
F) A) and B)

Question 12

The most dangerous outcome of a Taenia solium infection occurs when

Accepted Answer

A)   cysticerci are ingested.
B)   larvae enter the body through intact skin.
C)   the host immune system fails to react against it.
D)   eggs are ingested.
E)   larvae cross the placenta.F) All of the above
G) B) and C)

Question 13

Which of the following statements is incorrect about hepatitis A?

Accepted Answer

A)   It is transmitted by the oral-fecal route.
B)   Havrix is an inactivated vaccine for prevention.
C)   An infection predisposes a person for liver cancer.
D)   Immune globulin therapy helps decrease the severity.
E)   The virus produces flu-like symptoms with discomfort near the liver and darkened urine.F) All of the above
G) B) and E)

Question 14

The causative organism for mumps is ______.

Accepted Answer

A)   Vibrio cholerae
B)   Corynebacterium diphtheriae
C)   Morbillivirus
D)   Paramyxovirus
E)   Streptococcus pyogenesF) B) and D)
G) C) and D)

Question 15

As recently as the 1980s,the medical establishment believed ulcers to be caused by stress and an increase in gastric acidity.How has the current understanding of ulcer development changed patient treatment?

Accepted Answer

A)   There is no treatment for ulcers, then or now.
B)   Antibiotics are now used to treat ulcers.
C)   Different foods are now suggested for patients having ulcers.
D)   Doctors now give their patients sedatives to calm patients with ulcers.E) C) and D)
F) B) and D)

Question 16

Both Taenia and Trichinella can be found as cysts embedded in pork muscle.Which of the following statements about these organisms is incorrect?

Accepted Answer

A)   Both organisms release eggs in the feces to propagate the helminth.
B)   Both helminths can exit the digestive system and migrate to other tissues.
C)   For both organisms, cyst envelopes are digested in the stomach, releasing the larvae to the intestine.
D)   Only Taenia can be transmitted from one human to another.E) None of the above
F) B) and C)

Question 17

Most antihelminthic medications act only against the pathogens,not the human host.

Accepted Answer

A) True 
 B)False

Question 18

Identification of the causative microbe for a diarrheal infection often requires a stool culture.The best medium for this purpose is

Accepted Answer

A)   a medium containing a broad-spectrum antibiotic as a selective agent.
B)   a general purpose medium that supports the growth of the diverse gut microbiota.
C)   a medium containing bile as a selective agent.
D)   a medium containing mammalian blood to provide extra growth factors.
E)   a liquid medium, as the diarrhea conditions are more liquid than solid.F) C) and E)
G) A) and D)

Question 19

Your son has not had the MMR vaccine (measles,mumps,rubella) because you are apprehensive about vaccines and their side effects.Your sister says that you are setting him up for a potentially damaging scenario.Which argument has the great scientific validity and why?

Accepted Answer

A)   Your sister is correct. Even if your son does not get the mumps now when he is young, but gets the infection later in life, there is a possibility of severe side effects.
B)   Your sister is correct in her warnings. If your son gets a severe case of mumps, he will likely develop a fatal secondary infection.
C)   You are correct in protecting your son. If you can keep him from getting mumps when young, it is no longer a problem. It is simply a childhood disease.
D)   You are correct to be apprehensive because vaccines have been the cause of autism in children.E) A) and B)
F) All of the above

Question 20

Which of the following statements is incorrect about shigellosis?

Accepted Answer

A)   Outbreaks have occurred in day care centers.
B)   It frequently complicates to sepsis.
C)   Human carriers cause fecal transmission.
D)   It is also called dysentery.
E)   Symptoms include watery diarrhea with bloody, mucoid stools and abdominal cramps.F) A) and C)
G) All of the above

Exam 22: Infectious Diseases Affecting the Gastrointestinal Tract

Which of the following is not true of schistosomiasis?

Correct Answer
verified

Trichinella species spend their entire life within the body of a mammalian host,but can move from one species to another upon consumption of an infected animal.Which of the following statements regarding trichinosis is incorrect?

Correct Answer
verified

Correct Answer
verified

Which of the following is not a normal causative agent of acute diarrhea with vomiting (food poisoning) ?

Correct Answer
verified

Which of the following statements is incorrect about hepatitis A?

Correct Answer
verified

The causative organism for mumps is ______.

Correct Answer
verified

Most antihelminthic medications act only against the pathogens,not the human host.

Correct Answer
verified

Identification of the causative microbe for a diarrheal infection often requires a stool culture.The best medium for this purpose is

Correct Answer
verified

The virulence of Vibrio cholerae is due to its ______.

Correct Answer
verified

GALT refers to

Correct Answer
verified

The most dangerous outcome of a Taenia solium infection occurs when

Correct Answer
verified

WASH initiatives are public health initiatives that address WAter,Sanitation,and Hygiene.Which of the following diseases would not be expected to show a decrease in prevalence following a successful WASH campaign?

Correct Answer
verified

Which of the following statements is incorrect about shigellosis?

Correct Answer
verified

As recently as the 1980s,the medical establishment believed ulcers to be caused by stress and an increase in gastric acidity.How has the current understanding of ulcer development changed patient treatment?

Correct Answer
verified

Which of the following statements regarding Campylobacter jejuni is incorrect?

Correct Answer
verified

A common food intoxication is caused by enterotoxin-producing strains of ______.

Correct Answer
verified

Both Taenia and Trichinella can be found as cysts embedded in pork muscle.Which of the following statements about these organisms is incorrect?

Correct Answer
verified

The fact that Salmonella has a high ID₅₀ means that

Correct Answer
verified

Your son has not had the MMR vaccine (measles,mumps,rubella) because you are apprehensive about vaccines and their side effects.Your sister says that you are setting him up for a potentially damaging scenario.Which argument has the great scientific validity and why?

Correct Answer
verified

Which of the following helminths is correctly paired with its portal of entry?

Correct Answer
verified

Exam 22: Infectious Diseases Affecting the Gastrointestinal Tract

Which of the following is not true of schistosomiasis?

Correct AnswerverifiedShow Answer

Trichinella species spend their entire life within the body of a mammalian host,but can move from one species to another upon consumption of an infected animal.Which of the following statements regarding trichinosis is incorrect?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following is not a normal causative agent of acute diarrhea with vomiting (food poisoning) ?

Correct AnswerverifiedShow Answer

Which of the following statements is incorrect about hepatitis A?

Correct AnswerverifiedShow Answer

The causative organism for mumps is ______.

Correct AnswerverifiedShow Answer

Most antihelminthic medications act only against the pathogens,not the human host.

Correct AnswerverifiedShow Answer

Identification of the causative microbe for a diarrheal infection often requires a stool culture.The best medium for this purpose is

Correct AnswerverifiedShow Answer

The virulence of Vibrio cholerae is due to its ______.

Correct AnswerverifiedShow Answer

GALT refers to

Correct AnswerverifiedShow Answer

The most dangerous outcome of a Taenia solium infection occurs when

Correct AnswerverifiedShow Answer

WASH initiatives are public health initiatives that address WAter,Sanitation,and Hygiene.Which of the following diseases would not be expected to show a decrease in prevalence following a successful WASH campaign?

Correct AnswerverifiedShow Answer

Which of the following statements is incorrect about shigellosis?

Correct AnswerverifiedShow Answer

As recently as the 1980s,the medical establishment believed ulcers to be caused by stress and an increase in gastric acidity.How has the current understanding of ulcer development changed patient treatment?

Correct AnswerverifiedShow Answer

Which of the following statements regarding Campylobacter jejuni is incorrect?

Correct AnswerverifiedShow Answer

A common food intoxication is caused by enterotoxin-producing strains of ______.

Correct AnswerverifiedShow Answer

Both Taenia and Trichinella can be found as cysts embedded in pork muscle.Which of the following statements about these organisms is incorrect?

Correct AnswerverifiedShow Answer

The fact that Salmonella has a high ID50 means that

Correct AnswerverifiedShow Answer

Your son has not had the MMR vaccine (measles,mumps,rubella) because you are apprehensive about vaccines and their side effects.Your sister says that you are setting him up for a potentially damaging scenario.Which argument has the great scientific validity and why?

Correct AnswerverifiedShow Answer

Which of the following helminths is correctly paired with its portal of entry?

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
verified

The fact that Salmonella has a high ID₅₀ means that

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified