Foodborne illness Flashcards
helicobacter pylori causes what?
peptic ulcer
peptic ulcer pathogenisis
helicobacter pylori uses its flagella to burrow into intestinal cells and uses urease to neutralize stomach acid. It replicates inside the cell and then releases a cytotoxin to kill surrounding cells. thus, treatment involves drugs that neutralize stomach acid so the stomach lining can heal. fecal oral transmission
shigella
enters cells and multiples. then breaks down barrier between surrounding cells and spread to them. when it gets to the blood, however, the immune system finds it
E. coli
causes traveler’s diarrhea. water from foreign countries has a higher bacterial count. uses adhesions to resist flushing through intestinal system. DONT USE ANTI-DIARRHEAL DRUGS.
Staph aureus
causes traditional food poisoning. seen in social gatherings. reheating food does nothing due to toxins
Clostridium difficile
a product of modern medicine. seen in hospitals. infects those with depleted normal microbiota. endospore forming. can’t be killed with hand sanitizer. leads to pseudomembranous colitis.
salmonella enterica serotypes
A) typhi/paratyphi
B)enteritidis/typhimurium
salmonella replication
enters cell via vesicle and replicates in vesicle. can spread to blood and evade immune system.
typhi/paratyphi
thypoid fever. contaminated food/water
enteritidis/typhimurium
salmonellois. eat raw eggs/chicken
vibrio cholera
cholera toxin. found in water. fecal oral route.
vibrio vulnificus
in contaminated seafood. can ingest or enter via wound. thrives in warm water. if untreated it is fatal
Giardia intestinalis
causes giardiasis. can be asymptomatic or have diarrhea. protozoa that lives in water. ingestion of cysts
taenia sp.
tape worms. via cow or pork meat
