Micro - Vibrio & Related Genera Flashcards
Common characteristics of Genus Vibrio
- Gram -
- Oxidase +
- Curved bacilli
- Most species are soonoses
- Most are marine
- Some in fresh water
What species of genus Vibrio causes the ds. Cholerae?
Vibrio cholerae
What type of ds. is Cholera?
Enteric ds. - massive amounts of fluids lost
How is Vibrio cholerae spread?
Water bourne
What are the virulence factors of Vibrio cholerae?
- Exotoxin
- Flagellum
What is unique about the exotoxin in Vibrio cholerae?
Exotoxin has ADP ribosylating activity
What is affected in the GI tract when Vibrio cholerae is present?
The fluid secreting proteins in the GI tract are affected
What is a symptom of Cholera ds.?
“rice water feces”
What other organism has an exotoxin that has ADP ribosylating activity and affects the fluid secreting proteins of the GI tract?
E.coli
How would you differentiate Vibrio cholerae from E.coli?
V.cholerae:
- shape - curved bacilli
- oxidase +
E.coli
- bacilli
- oxidase -
To contract Cholera does it require a large or small does of the bacteria Vibrio cholerae?
Large infectious dose
Is the ds. Cholera considered an infection or intoxication?
food/water INFECTION
What is the incubation period for Cholera ds.?
24-48 hrs.
What symptoms will you see with Cholera ds.?
- Massive fluid loss
- Dehydration
- Electolyte imbalance
- “RICE WATER FECES”
What species of the of the Vibrio genus causes a food INFECTION associated with raw seafood/fish
Vibrio parahaemolyticus
What symptoms will you see with the food infection caused by Vibrio parahaemolyticus?
- Gastroenteritits
- Mild diarrhea
Does Vibrio parahaemolyticus replicate fast or slow?
Rapid - replicates every 9 min
What species of the Vibrio genus causes a flesh eating ds.?
Vibrio vulnificus
Where is Vibrio vulnificus found?
Marine water (common in Gulf of Mexico)
How does Vibrio vulnificus spread?
Enters through cuts/scrapes on skin
Vibrio vulnificus is consdiered what kind of bacteria?
Flesh eating bacteria
What are the 4 flesh eating bacteria?
Gram +
- Streptococcus pyogenes
- Staphylocococcus aureus
Gram -
- Vibrio vulnificus
- Aeromonas species
What organism is responsible for a food INFECTION associated with raw eggs, raw chicken and hamburger?
Campylobacter jejuni
What is Campylobacter jejuni also responsible for?
3rd most common cause of gasterenteritis
What is more common Campylobacter jejuni or Salmonella enteritidis?
Campylobacter jejuni
How could you differentiate Campylobacter jejuni from Salmonella enteritidis and E.coli?
Campylobacter jejuni
- shape - curved bacilli
- oxidase +
Salmonella enteritids
- Shape - bacilli
- oxidase -
E.coli
- Shape - bacilli
- oxidase -
Which organism causes 90% of all gastric ulcers?
Helicobacter pylori
Helicobacter pylori is what type of flora?
Normal flora in the stomach
What is unique about Helicobacter pylori?
It contains a potent urease that protects the organism and allows for ID of infection
