Chapter 22 Questions Test Questions – Flashcards
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Defenses of the GI tract against pathogens include
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All of these choices are correct
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The mutinous glycoprotein covering teeth that streptococci attach to is called the
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Pellicle
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Which organ of the Gi tract has a large commensual population of microorganisms?
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Pellicle
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The most common infectious disease in humans is
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Dental caries
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The main causes of dental caries seem to be
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Both B and C are correct
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Oral flora on the tooth surface
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use fimbriae and slime layers to adhere
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Gingivitis
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All choices are correct
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All of the following are true of acute necrotizing ulcerative gingivitis (AUNG) except:
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Very communicable
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The causative organism for mumps is
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Paramyxovirus
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The virulence factor for mumps is
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Spike-induced syncytium
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Orchitis and epididymitis is seen in young adult males as a complication of
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Mumps
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Helicobacter pylori causes
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All of the choices are correct
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Which is not a characteristic of Heliocobacter pylori?
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Produces enteroxin that causes diarrhea
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Which of the following is mismatched?
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All of the choices are correct
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Salmonella are
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Motile
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Typhoid fever gas the following characteristics except:
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Spread by ingestion of food contaminated with animal feces
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Salmonelloses are
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All of the choices are correct
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Salmonella typhi
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All of the choices are correct
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Which is incorrect about shigellosis?
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Frquently involve septicemia
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Shigella species have the following characteristics except?
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They produce urease and hydrogen sulfide
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E. coli O157:H7 characteristics include all of the following except it
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Only causes occupational illness in people who work with animals
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Which of the following is not a virulence factor of E.Coli O157:H7?
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Secretes shiga exotoxin from E.coli chromosome
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Which of the following is not true of Enterotoxigenic E. col (ETEC)?
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A high fever is present
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Which of the following is not truer of Enterovasive E.Coli (EIEC)?
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Produces shiga toxin
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Escherichia coli infectiond
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All of the choices are correct
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All of the following are characteristics of Campylobacter jejune except?
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Infects the stomach
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The most common bacterial cause of diarrhea in the United States is >
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Campylobacter
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Campylobacter infection has all of the following characteristics except?
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Is caused by a shiva toxin
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Which is true of Yersinia enterocolitica and Yersinia pseudotuberculosis?
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Intense pain caused by inflammation of the ilium and mesenteric lymph nodes
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Production of enterotoxin is a characteristic of
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Clostridium difficile
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All of the following pertain to Clostridium difficult infection except it is?
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Due to ingestion of contaminated, improperly stored, cooked meats and gravies
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Which is not true of Clostridium difficile?
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Produces "rice-water" stools
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The virulence of Vibrio cholerae is due to its
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Enterotoxin
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Cholera symptoms are
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All of the choices are correct
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The most immediate and important treatment needed to prevent death in Cholera victims is
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Water and electrolyte replacement
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"Rice water stools" are associated with disease caused by which organism?
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Vibrio cholerae
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Outbreaks of which apicomplexan disease have been associated with fecal-contaminated drinking water?
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Cryptosporidiosis
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Symptoms of cryptosporidiosis include
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HEadache, sweats, vomiting, servere abdominal cramps and diarrhea
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The primary viral cause of chronic diarrhea, globally is
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Rotavirus
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Which of the following is not a normal causative agent of acute diarrhea with vomiting (food poisoning)?
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Clostridium difficile
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A common food intoxication is caused by enterotoxin-producing strains of
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Staphylococcus aureus
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Which is incorrect about Staphylococcus aureus food intoxication?
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Ingestion of the pathogen allows it to multiply and damage the GI Tract lining
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Outbreaks of which apicomplexan disease have been associated with fecal-contaminated imported raspberries and also fresh greens and drinking water
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Cyclosporiasis
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Entamoeba histolytica is acquired by
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All of the choices are correct
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All of the following can be trasmisitted by drinking contaminated water except
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MALARIA
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Giardiasis involved
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Symptoms of abdominal pain, flatulence and diarrhea
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Inflammation of the liver with necrosis of the hepatocyctes and swelling due to mononuclear response is a disease called
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Hepatitis
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Hepatitis B virus
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All of the choices are correct
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Hepatitis B infection
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Increases risk for hepatocelluar cancer
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Which is incorrect about Hepatitis A infection?
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Predisposes a person for liver cancer
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Which is mismatched?
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Hepatitis D virus- Defective RNA virus that connects with HAV
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The most common cause of liver cancer in the US is
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HCV
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Parasitic helminthes have the following characteristics except
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Have larval forms that do not affect humans
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Asacaris lumbricoides
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All of the choices are correct
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Enterobius vermicularis is
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an intestinal worm that easily contaminates fibers and fomites
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All of the following pertain to tapeworms except
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Eosinophilia does not occur
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General symptoms of helminth infection includes all of the following except
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Intense abdominal pain
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Trichinosis includes all of the following except
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All of the choices are correct
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Liver flukes live in all the following areas except
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SMALL INTESTINE
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Which of the following is not true of schistomiasis?
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Worms can invade the brain
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Which of the following infections involves intermediate development in snails and fresh water fish?
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Both A & B
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Which of the following helminths is paired with a correct characteristic(s) of its pathogenesis?
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Strongyloides stercoralis- life and transmission cycle B
