24 Questions
Which bacterial genus does the text primarily focus on?
Escherichia
What is the main virulence factor associated with E.coli?
Capsular K antigen
Which type of agar would E.coli grow pink on?
MacConkey's agar
What is the significance of the 'Green Coasters' associated with E.coli?
Metallic green sheen on agar
Which virulence factor of E.coli is particularly responsible for causing neonatal meningitis?
- K antigen
How does EHEC cause severe Hemorrhagic Colitis?
Inhibition of ribosomes by a toxin
What is the mechanism by which damaged endothelial lining causes thrombocytopenia?
Platelets adhere to the damaged lining, decreasing platelet count and causing thrombocytopenia.
Which E. coli serotype is associated with outbreaks and is commonly referred to as the 'E. coli Burger'?
O157:H7
What is the mechanism of action of the heat-labile toxin produced by ETEC (Enterotoxigenic E. coli)?
Increases cAMP levels
Which E. coli pathotype is associated with infantile diarrhea and attaches to and effaces the mucosa?
EPEC (Enteropathogenic)
Which E. coli pathotype is characterized by biofilm formation and is associated with endemic persistent diarrhea, acute traveler's diarrhea, and sporadic acute diarrhea?
EAEC (Enteroaggregative)
What is the recommended treatment for E. coli infections, according to the text?
TMP/SMX or fluoroquinolones
What is the main virulence factor of E. coli that leads to neonatal meningitis?
- K antigen
Which agar type results in E. coli appearing with a metallic green sheen?
EMB Agar
What is the most common cause of UTIs attributed to E. coli?
Bladder Drink with long fimbriae
Which E. coli strain is responsible for severe Hemorrhagic Colitis from consuming undercooked meat?
EHEC
Which virulence factor of E. coli inhibits protein synthesis at the 60s ribosomal subunit?
Toxin inhibiting 28s ribosomes
In which population does Shiga-like Toxin produced by E. coli cause hemolytic uremic syndrome (HUS) more commonly?
Children under 10 years
What is the mechanism by which ETEC (Enterotoxigenic E. coli) causes traveler's diarrhea?
It produces a heat-labile toxin that increases cAMP levels.
Which E. coli pathotype is characterized by attaching to and effacing the mucosa, and is associated with infantile diarrhea?
EPEC (Enteropathogenic)
What is the characteristic feature of the E. coli O157:H7 serotype?
It is associated with outbreaks and is commonly referred to as the 'E. coli Burger'.
Which E. coli pathotype is characterized by inflammatory dysentery and cell invasion?
EIEC (Enteroinvasive)
What is the significance of the mnemonic 'LASG' in the context of E. coli pathotypes?
It represents the mechanisms of action of toxins produced by ETEC.
What is the characteristic feature of EAEC (Enteroaggregative E. coli)?
It forms biofilms and is associated with endemic persistent diarrhea.
Test your knowledge on the characteristics of Escherichia coli with this quiz covering its gram-negative nature, lactose fermentation, capsule presence, virulence factors, and other distinguishing features.
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