Escherichia Coli – Enteric Bacteria
Über den Vortrag
Der Vortrag „Escherichia Coli – Enteric Bacteria“ von Vincent Racaniello, PhD ist Bestandteil des Kurses „Gram-negative Bacteria“.
Quiz zum Vortrag
Which of the following organisms is the most common cause of urinary tract infections?
- E. coli
- Shigella
- Salmonella
- V. cholerae
- S. aureus
What is the morphology of E. coli?
- Gram-negative rod
- Gram-positive rod
- Gram-negative cocci
- Gram-positive bacillus
- Gram-positive spirochete
Which of the following is NOT a common cause of E. coli infection?
- Contaminated respiratory droplets
- Improper food preparation/handling
- Manure contamination of food
- Contaminated irrigation of fruits and vegetables
- Contaminated drinking water
Traveler's diarrhea is most commonly caused by which of the following?
- ETEC
- EHEC
- V. cholerae
- EPEC
- EAggEC
What is the mechanism of action of LT enterotoxin?
- Activates adenylate cyclase to increase cAMP concentrations
- Inhibits the 60s subunit of ribosomes
- Increases levels of cGMP in the intestine
- Decreases Cl absorption, increases Na secretion
- Decreases secretion of fluids and electrolytes, leading to cell lysis
Which of the following is the correct pairing of ETEC enterotoxins with their pathologic effect?
- ST toxin — increased cGMP; LT toxin — increased cAMP
- ST toxin — increased cAMP; LT toxin — increased cGMP
- ST toxin — decreased cGMP; LT toxin — increased cAMP
- ST toxin — increased cGMP; LT toxin — decreased cAMP
- ST toxin — decreased cAMP; LT toxin — decreased cGMP
The pathogenesis of EPEC is mediated by...
- ...intimin.
- ...LT toxin.
- ...ST toxin.
- ...Shiga-like toxin.
- ...pili.
Which of the following toxins is associated with VTEC?
- Shiga toxin
- Cholera toxin
- LT toxin
- ST toxin
- Intimin
Which of the following is NOT associated with EHEC serotype O157:H7?
- Traveler's diarrhea
- HUS
- Shiga toxin
- Undercooked hamburger meat
- Contaminated water
Which of the following symptoms is NOT seen with hemolytic uremic syndrome?
- Bloody sputum
- Kidney failure
- Thrombocytopenia
- Lysis of red blood cells
- Damage to small blood vessels
An HIV-positive patient residing in a developing country would be most susceptible to which of the following pathogens?
- EAEC
- EHEC
- ETEC
- EPEC
- EIEC
EAggEC produces a toxin that does which of the following?
- Increases cGMP in the enterocyte
- Acts like ETEC LT toxin
- Increases cAMP in the enterocyte
- Acts like cholera toxin
- Acts like Shiga toxin
The presence of blood in dysenteric diarrhea is due to which of the following?
- Invasion into enterocytes with damage to the mucosa
- Bacterial pili adhesion
- Production of enterotoxins
- Biofilm formation
- Stimulation of angiogenesis
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Dozent des Vortrages Escherichia Coli – Enteric Bacteria
Vincent Racaniello, PhD
Dr. Vincent Racaniello is a Higgins Professor of Microbiology and Immunology at Columbia University, in New York, USA.
He obtained his PhD at Mount Sinai School of Medicine, in New York City, in 1979 and joined the faculty of Columbia University in 1982.
Because of his achievements, he has received several awards, including the Irma T. Hirschl, Searle Scholars Program, Eli Lilly, and NIH Merit Awards. Dr. Racaniello is interested in using new media for medical education; he writes on his virology blog and hosts and produces several podcasts.
Within Lecturio, Dr. Racaniello teaches courses on Microbiology.
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