Science Quiz / Infectious diarrhea

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Can you name the Infectious diarrhea?

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CharacteristicsInfectious OrganismEpidemiology
Gram negative curved rod; facultative anaerobe; halophileFound in alkaline environments
Gram positive rod; causes large joint arthralgia and hyperpigmentation of skinSeen in male farmers and T-cell immune deficiency
Epithelial destruction and inflammation due to colonic invasionFecal-oral transmission often seen in travelers
ATR gene promotes resistance to gastric acidFound in eggs and dairy
LT-1 and STa toxins enter mucosa causing secretory diarrheaFecal-oral transmission often seen in travelers
Direct bacterial destruction of small intestinal brush border leading to malabsorptionSeen in infants in developing countries
Bacterial agglutination which wedge in villi and crypts of Lieberkuhn, blocking absorption of fluid and increasing mucus secretionSeen in infants in developing countries
Gram negative rod; microaerophile with polar flagellumFound in contaminated poultry (not in food handlers)
10-14 day incubation; engulfed in macrophages and then spreads via lymphaticsTransmitted by food handlers
2-3 day incubation; presents with severe pneumonia; 90% mortality rateAnimal reservoir = rat and squirrel; transmitted by respiratory droplets
CharacteristicsInfectious OrganismEpidemiology
1-2 week incubation; affects the terminal ileum; can lead to hepatitis, abscesses or osteomyelitisIncreased susceptibility in hemochromatosis patients
1-6 day incubation; presents with grossly enlarged lymph nodes leading to sepsis and heart failureAnimal reservoir = rat and squirrel; higher incidence in veterinarians
Facultative anaerobe; invades enteric mucosa forming microabscesses due to toxinFound in crowded conditions and the homosexual population
Pseudomembranous colitis due to A and B toxinsNosocomial infection
Toxin and co-regulated pilus cause severe secretory diarrhea which can cause bicarb and potassium lossCommonly found with flooding or eating contaminated shellfish
Facultative anaerobe; adheres to M cells in Peyer's patchesFound in poultry
Shiga-like toxin destroys intestinal villi; can cause acute renal failure, hemolytic anemia and thrombocytopeniaFecal-oral transmission in contaminated food
Associated with IgA deficiency; causes malabsorption and secretory diarrheaObtained by drinking from freshwater contaminated by animal feces
Surface LPS causes damage to intestinal mucosa form microabscesses and crypt abscessesFound in contaminated poultry

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