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50 Cards in this Set
- Front
- Back
Intoxication
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*Ingestion of pre-formed
toxin and resulting signs and symptoms |
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Infection
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*Pathogen enters the GI tract
and multiplies. |
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Toxico-infection
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*Pathogen enters the GI tract, multiplies and produces a toxin in GI tract, causing illness.
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What are the signs/symp. of Dysentery?
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*severe diarrhea accompanied
by blood or mucus |
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What type of toxin does Staphylococcus aureus release in bacterial food poisoning?
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*heat-stable enterotoxin
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What are the characteristic signs and symptoms for mumps?
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*parotitis
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What are the characteristic signs and symptoms for cholera?
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*rice-water stools
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What are the characteristic signs and symptoms for Entamoeba histolytica?
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*blood and mucous
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What are the characteristic signs and symptoms for Shigella dysenteriae?
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*blood and mucous
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fructose + S. mutans →
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lactic acid (attacks enamel)
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sucrose + S. mutans →
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glucose + fructose
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glucose + S. mutans →
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dextran (attachment factor)
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Characteristics of HAV?
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*naked ss (+) RNA virus
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Characteristics of HBV?
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*enveloped circular dsDNA virus with ssDNA gaps
and intermediate RNA stage |
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What signs/symp. are associated with a helminth infection of Enterobius vermicularis?
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*perianal itching, irritability,
sleeplessness |
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Characteristics of HCV?
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*enveloped ssRNA+
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What signs/symp. are associated with a helminth infection of Ascaris lumbricoides?
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*blockage and migration
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Signs and Symptoms of Giardia lamblia?
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*flagellate, very smelly loose fatty stools with excessive flatulence, weight loss
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What signs/symp. are associated with a helminth infection of Necator americanus?
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*iron deficiency anemia
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Signs and Symptoms of Entamoeba histolytica?
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*amoeba, dysentery
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What signs/symp. are associated with a helminth infection of Taenia solium?
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*maybe weight loss
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Signs and Symptoms of Cryptosporidium parvum?
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*sporozoan, self-limiting diarrhea in healthy people but life-threatening diarrhea in immunocompromised people
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Taenia solium is found in what?
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*Pork
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List the GI Toxico-Infections
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*Salmonellosis
*Campylobacter jejuni *Clostridium perfringenes *Shigellosis (bacillary dysentery) *Cholera *ETEC, EHEC, EIEC *Pseudomembranous colitis |
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List the GI Intoxications
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*Staphylococcus aureus
*Clostridium botulinum *Clostridium perfringenes |
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List the GI Infections
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*Typhoid fever (enteric
fever) |
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What are the complications of a UTI?
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*Septicemia
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What are the complications of syphilis?
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*tertiary syphilis, congenital syphilis
(Hutchinson’s teeth, saddle nose, Saber shin, deafness) |
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What did Robert Hooke do?
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Proposed cell theory; observed cork with microscope
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What did Anton van Leeuwenhoek do?
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*Discovered morgs; called them animalcules
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After a gram stain, what color are gram-negative organisms?
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*Pink-red
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What did Louis Pasteur do?
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*Proposed the germ theory; proposed aseptic techniques; pasteurization; developed anthrax and rabies vaccines
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What did Robert Koch do?
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*Developed microbiological media; developed Koch's Postulates
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What did Edward Jenner do?
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*Discovered the process of vaccination
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After a gram stain, what color are gram-positive organisms?
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*Purple
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What is common to both Gram+ and Gram- organisms and what is different?
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*Both have Peptidoglycan
*Neg: Lipopolysaccharide *Pos: Teichoic acids |
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What is competitive inhibition?
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*inhibitor binds to active
site |
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What is Conjugation?
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*transfer of plasmid from F+
cell to F- cell. Involves cell to cell contact. |
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What is non-competitive inhibition?
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*inhibitor binds somewhere else besides the active site, changing conformation of active site
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What is Transformation?
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*transfer of naked DNA
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Describe the stages of microbial growth and death
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*Lag: bacteria adjusting to medium, active enzymatically
*Log (exponential): most active growth *Stationary: # of growing organisms = # of dying organisms *Death: wastes build up, nutrients spent,most cells dying |
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What is Transduction?
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*transfer of DNA with help of
a bacteriophage (bacterial virus) |
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What do you use autoclaving for?
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*for glass, anything that can
withstand pressure, moisture, and temperature |
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What do you use Ethylene oxide for?
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*for plastics, sutures,
stuff that would melt or can’t stand pressure. |
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As an antibiotic, explain Quinolones (ciprofloxacin):
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*Inhibits DNA gyrase
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As an antibiotic, explain Aminoglycosides (gentamicin):
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*inhibit protein synthesis (prevents t-RNA from binding to 30S ribosome subunit); synergy with β-lactams
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As an antibiotic, explain Penicillins:
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*inhibit cell wall synthesis
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As an antibiotic, explain Tetracyclines:
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*inhibit protein synthesis (prevents
t-RNA from binding to 30S ribosome subunit) |
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As an antibiotic, explain Erythromycin:
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*inhibit protein synthesis by
binding to 50S ribosome subunit |
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As an antibiotic, explain Cephalosporins:
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*inhibit cell wall synthesis
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