Vibrio, Campylobacter, Helicobacter and Pseudomonas Flashcards
What does vibrio cholerae cause in its host?
Diarrhea! Kind of considered an enteric
Which 2 groups vibrio cholerae cause cholera?
Strains of O group 1 and O group 139
How does vibrio cholerae die?
ACID so we must ingest large numbers in order for it to survive (lots of infested water, for example)
What is the demographic most susceptible to cholera?
Children (most adults tend to not show symptoms but they shed the bacteria in their fecal matter…. India)
What is the hallmark sign of cholera?
Rice water stools (flecks of white that look like rice which are actually mucous from increased mucous production)
What is the morphology of campylobacter?
Curved or spiral shaped gram negative rods
What is a common source of campylobacter jejuni?
Raw chicken juice can contain an infectious dose from must ONE DROP
Unpasteurized milk
Not very severe but quite common food poisoning
What bacteria mimics appendicitis?
Campylobacter jejuni because they get lower right quadrant pain
What are helicobacter famous for causing?
Gastric ulcers and duodenal ulcers (2 places we dont typically see setting up shop) - hence helicobacter pylori
How is helicobacter pylori able to survive in acidic environments?
Secrete urease which creates alkaline environment
Are ulcers caused by stress or can antibiotics help heal them?
Antibiotics can help heal ulcers created by helicobacter pylori (stress can be exacerbating)
Also bismuth (peptobismal) helps to create alkaline environment that relieve the ulcer of the acidic environment
What is most of our normal gut flora made up of?
The family of anaerobic gram negative bacteria
What is unique about the morphology of bacteroides fragilis?
They are gram negative but do NOT have lipid A so its cell wall does not contain endotoxin
Where might you see abscesses caused by bacteroides fragilis?
Intestine
Obstetric and gynecologic patients
Gums
How did fusobacterium get its name?
Fusiform shape
