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50 Cards in this Set

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