Ch. 19 - Digestive System Infections

Norman-McKay- Microbiology: Basic and Clinical Principles 2nd Edition

Norman-McKay2nd EditionMicrobiology: Basic and Clinical PrinciplesISBN: 9780137661619Not the one you use?Change textbook

Norman-McKay 2nd Edition

Ch. 19 - Digestive System Infections

Problem 17

Chapter 19, Problem 17

True or False: Giardia infections in the United States are all imported from other countries.

Verified step by step guidance

Step 1: Understand the nature of Giardia infections. Giardia is a protozoan parasite that causes giardiasis, an intestinal infection characterized by diarrhea and other gastrointestinal symptoms.

Step 2: Recognize the transmission routes of Giardia. It is commonly transmitted through ingestion of contaminated water or food, or through person-to-person contact, especially in settings with poor sanitation.

Step 3: Consider the epidemiology of Giardia infections in the United States. While some cases are indeed imported from travelers returning from endemic areas, Giardia is also endemic in the U.S., meaning it can be acquired domestically.

Step 4: Evaluate the statement: 'Giardia infections in the United States are all imported from other countries.' Since Giardia can be transmitted within the U.S. through contaminated water sources or person-to-person spread, not all infections are imported.

Step 5: Conclude that the statement is false because Giardia infections in the U.S. can be both imported and locally acquired.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Giardia lamblia and Giardiasis

Giardia lamblia is a protozoan parasite that causes giardiasis, an intestinal infection characterized by diarrhea and abdominal cramps. It is transmitted through ingestion of cysts in contaminated water, food, or via person-to-person contact.

Epidemiology of Giardia in the United States

Giardia infections in the U.S. can be both imported and locally acquired. While travelers may bring infections from endemic areas, Giardia is also endemic in the U.S., with outbreaks linked to contaminated water sources and person-to-person transmission.

Modes of Transmission and Risk Factors

Giardia spreads primarily through the fecal-oral route, often via contaminated drinking water or recreational water. Risk factors include poor sanitation, close contact in childcare settings, and exposure to untreated water, making local transmission possible.

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Growth Factors

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Textbook Question

Which of the following is most controversial for a nonseptic patient with E. coli O157:H7?

a. Administering oral rehydration therapy

b. Administering antibiotic therapy

c. Administering fever-reducing medications

d. Administering intravenous rehydration therapy

e. Withholding agents like diphenoxylate-atropine that reduce GI tract motility

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Textbook Question

Using the following list, construct a concept map or a chart connecting these terms according to the pathogen and correlated disease: fecal–oral, diarrhea, rotavirus, Campylobacter jejuni, bacterial, viral, foodborne transmission, antibiotics, vaccine.

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Textbook Question

Larry goes to his local Red Cross center to donate blood for the first time. A few weeks later a Red Cross agent contacts him to ask him to come in for a confidential meeting. During the meeting, Larry learns that his blood tested positive for hepatitis. He claims to be in excellent health and doesn’t believe the diagnosis. What virus does Larry most likely have? (NCLEX/HESI/TEAS)

a. Hepatitis A

b. Hepatitis B

c. Hepatitis C

d. Hepatitis D

e. Hepatitis E

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Textbook Question

A lower endoscopy examination of a patient complaining of abdominal cramps and diarrhea reveals pus-laden patches along the intestinal wall. Which of the following infectious agents could be considered the pathogen responsible for this condition?

a. Clostridioides difficile

b. Shigella

c. Salmonella serotype Typhi

d. Helicobacter pylori

e. Campylobacter jejuni

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Textbook Question

List the symptoms associated with the various stages of Schistosomiasis.

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Textbook Question

A father suspects his son has intestinal worms due to his complaint of an itchy bottom. What habit is most likely responsible for his infection?

a. Walking outside barefoot