Vibrio Flashcards
Is Vibrio more resistant to acid or alkaline pH?
Alkaline.
What enzyme does V. cholera secrete to obtain nutrients from zooplankton?
Chitinase.
What distinguishes the El Tor biotype from the classical biotype?
El Tor produces a hemolysin and classical does not.
What is the characteristic appearance of the skin of someone infected with a cholera toxin producing Vibrio?
“Doughy” skin.
Which Vibrio is the least underdiagnosed, and why?
Vibrio vulnificus; revisit slide 3 for the “why”
How does the reservoir of V. cholerae differ from that of V. parahaemolyticus?
Cholerae is mostly fresh water, where V. parahaemolyticus requires slightly saltier water.
What serogroup is the cause of the current pandemic?
slide 6 has the answer….
What are the two predominant virulence factors of Vibrio cholerae? Are these found in the other two species we discussed?
See slide 7, second bullet point; the answer to the second question is “no”
Vibrios are more infectious to individuals who have what conditions?
immunocompromised, and those with liver disease
What is notable about the doubling time of V. parahaemolyticus?
It divides very rapidly – about once every 8-9 minutes.
Which of the Vibrios we discussed has the highest fatality rate?
<i>V. vulnificus.<i></i></i>
What is the lead cause of intestinal infection in the US due to seafood?
<i>Vibrio. parahaemolyticus<i></i></i>
What does the Kanagawa toxin from Vibrio parahaemolyticus do in the human body?
It acts a a hemolysin-bursting all of your red blood cells
Why is Vibrio vulnificus the most serious form of foodborne Vibrio infections?
It is septicemic and has a 50-60% fatality rate.
