micro exam #4

Card Set Information

Author:
ski4me18
ID:
80674
Filename:
micro exam #4
Updated:
2011-04-19 15:22:15
Tags:
chap
Folders:

Description:
chap 22 exam #4
Show Answers:

Home > Flashcards > Print Preview

The flashcards below were created by user ski4me18 on FreezingBlue Flashcards. What would you like to do?


  1. Know the causative agent for the following diseases: dental caries, shigellosis, typhoid fever, cholera, peptic ulcers and acute gastritis.
    • Dental caries: S. Mutans
    • Shigellosis: Shigella
    • Shigella dysenteriae - severe dysentery (worst kind, bacillary dysentery)
    • Shigella flexneri - dysentery
    • Shigella boydii - dysentery also Shigella, S. Sonnei Typhoid fever - Salmonella enterica serotype typhi
    • Cholera - Vibrio Cholerae
    • Peptic Ulcers- Helicobacter pylori
    • Acute gastritis - not sure.
  2. What is the difference between watery diarrhea, dysentery and enteric fever?
    • Watery diarrhea - Develops quickly and occurs frequently once you have it
    • Dysentery - Has blood and pus in it (this is the main, important difference)
    • Enteric fever - Systemic, (although focus is still on intestinal system) slower to develop
  3. How does food poisoning occur? How can you tell the difference?
    • Can result from two things:
    • -Infection: directly involves a pathogen
    • -Intoxication: Involves a toxin produced by a pathogen
    • Incubation time and severity depend on:
    • - Number of pathogens ingested --> infections.
    • - Amount of toxin ingested --> intoxications.
    • Incubation time is usually shorter in intoxications.
    • Intoxication may involve organs outside the digestive tract.
    • Botulism affects the central nervous system.
  4. What is the developmental process for dental plaque and carries?
    • Tooth surface becomes covered by pellicle, bacteria adhere to pellicle. This is facilitated by bacterial adhesion molecules. The initial adherent is usually strep mutans. Adhered bacteria grow and are joined by additional organisms including gram-positive cocci and gram-positive rods. After
    • 2-4 days, new layers of organisms have joined. These are followed by gram negative motile organisms. There can be as many as 400 species in
    • mature plaque
  5. What are the main differences between gingivitis and periodontitis?
    • Gingivitis- Inflammatory condition- Limited to the marginal surfaces of the gingival- Does not involve loss of bone- Can be corrected- Will continue as long as dental plaque remains
    • Periodontitis- Infection of the gingival- Results in loss of supportive bone and ligaments- Responsible for most tooth loss in adults
  6. What are the 5 types of E. coli?
    • Enterotoxigenic E. Coli (ETEC):
    • Toxin: Heat-labile and heat-stable
    • Lesion: Hypersecretion
    • Pathogenic gene location: plasmid
    • Transmission: fecal oral
    • Disease: Watery diarrhea
    • Enteropathogenic E. Coli (EPEC)
    • toxin: none
    • Lesion: Effacement (covering) of the small intestine
    • Pathogenic gene location: PAI
    • Transmission: Fecal-oral
    • Disease: Watery diarrhea
    • Enteroinvasive E. Coli (EIEC)
    • toxin: none
    • Lesion: Invasion and inflammation
    • Pathogenic gene location: large plasmid and PAI
    • Transmission: Fecal Oral
    • Disease: Dysentery
    • Enterohemorrhagic E. Coli (EHEC)
    • Toxin: Shiga toxin
    • Lesion: Effacement (covering) of colon and hemorrhage
    • Pathogenic Gene Location: PAI
    • Transmission: Fecal-oral, cattle
    • Disease: bloody diahrrea
    • Enteroaggregative E. Coli (EAEC)
    • toxin: none
    • lesion: adherent biofilm
    • pahtogenic gene location: none
    • transmission: none
    • disease: mucoid watery diarrhea
    • Common
    • Toxin: hemolysin
    • Lesion: inflammation
    • Pathogenic gene location: none
    • Transmission: Adjacent flora
    • Disease: Opportunistic
  7. Where does Salmonella and Campylobacter infection usually come from?
    Poor water quality, fecal contamination, undercooked meat, contaminated meat, pets
  8. Hepatitis A, B, C: transmission, chronicity, severity
    • Hep A
    • Transmission: fecal-oral, sexal
    • Chronicity: None
    • Severity: Usually mild
    • Hep B
    • Transmssion: fecal-oral, sexual, transfusion
    • Chronicity: 10 %
    • Severity: moderate
    • Hep C
    • Transmission: sexual, tansfusion
    • Chronicity: >50
    • Severity: mild
  9. the most common source of gastointestinal infection in the developed world is
    a. salmonella
    b. shigella
    c. e. coli
    d. campylobacter
    e. s. aureus
    • d. campylobacter
    • -- back cook says a. salmonella but pg. 508 says clear as day campylobacter!
  10. The causative agent for 80% of ulcer is
    A. clostiridum difficile
    B. campylobacter
    C. h. pylori
    D. e. coli
    e. none of the above
    C. H. pylori
    (this multiple choice question has been scrambled)
  11. an infection that is limited to the marginal surfaces of the gum tissue is called
    A. none of the aobe
    B. gingivitis
    C. trench mouth
    D. chronic peridontitis
    e. all of the above
    B. gingivitis
    (this multiple choice question has been scrambled)
  12. dental plaque is an example of
    A. trench mouth
    B. pellicle
    C. biofilm
    D. gingivitis
    e. all of the above
    C. biofilm
    (this multiple choice question has been scrambled)
  13. which of the following are produced by e. coli?
    a. pore-forming toxin
    b. shiga toxin
    c. heat-liable toxin
    d. heat-stable toxin
    e. all of the above
    e. all of the above
  14. transmission of traveler's diahrea occurs through
    A. the respriatory route
    B. the skin
    C. contaminated food/water
    D. sexual contact w/ infected individuals
    C. contaminated food/water
    (this multiple choice question has been scrambled)
  15. bacillary dysentery is caused by
    A. shigella
    B. campylobacter
    C. e. coli
    D. salmonella
    e. all of the above
    A. shigella
    (this multiple choice question has been scrambled)
  16. serotypes of salmonella can be identified by
    A. A and B
    B. O antigens
    C. H antigens
    D. capsules
    e. all ofhte above
    B. O antigens
    (this multiple choice question has been scrambled)
  17. the most important complication of typhoid fever is
    A. diarrhea
    B. high fever
    C. perforation ofthe colon wall
    D. dementia
    e. none of the above
    C. perforation of the colon wall
    (this multiple choice question has been scrambled)
  18. the disease cholera is caused by
    A. colonization of the entire intestinal tract
    B. perforation ofthe colon wall
    C. retention of fluid electorlytes
    D. an endotoxin
    e. all of the above
    A. colonization of the entire intestinal tract
    (this multiple choice question has been scrambled)
  19. which of the following has now been classified as hepatovirus?
    A. hep e
    B. hep a
    C. hep c
    D. echovirus
    e. none of the above
    B. hep a
    (this multiple choice question has been scrambled)
  20. chronic carriers are the main reservoirs for
    A. hep e
    B. hep b
    C. hep a
    D. hep c
    e. none of the above
    B. hep b
    (this multiple choice question has been scrambled)
  21. the intestinal parasite Giardia is found in
    a. fish
    b. mammals
    c. reptiles
    d. birds
    e. all of the above
    e. all of the above
  22. rice stools are characteristic of
    A. shigellosis
    B. cholera
    C. amoebic dysentery
    D. bacillary dysentery
    B. cholera
    (this multiple choice question has been scrambled)
  23. most of the normal microbil flora of the digestive system are found in
    A. stomach
    B. large intestines
    C. small intestines
    D. mouth
    B. large intestines
    (this multiple choice question has been scrambled)
  24. poltury products are alikely source of infection by
    A. shigella
    B. salmonella
    C. vibrio
    D. streptococcus
    B. salmonella
    (this multiple choice question has been scrambled)
  25. most gastrointestinal infections are tx w/
    A. quinacrine
    B. water and electrolytes
    C. penicillin
    d. none of the above
    B. water and electrolytes
    (this multiple choice question has been scrambled)

What would you like to do?

Home > Flashcards > Print Preview