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17 Cards in this Set
- Front
- Back
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Yersinia enterocolitica is primarily transmitted through what? |
puppy feces! (pet shop... english terrier pooped in his cage) |
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Who is the most common demographic fo rY. enterocolitica infections? |
toddlers! |
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Y enterocolitica can also be transmitted through what? What does this remind you of? |
contaminated milk products. Listeria. Y entero. is also resistant to the cold temperatures. |
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Y. enterocolitica has _______ staining, making it look like a _______ ___. |
bipolar; safety pin. |
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Y. enterocolitica is encapsulated/nonencapsulated. |
encapsulated |
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Main symptom of Y. enterocolitica? Describe it. |
Bloody diarrhea - its invasive (baby on the red stool) |
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Other symptoms of y. enterocolitica? |
since its invasive it can also cause systemic effects as well such as fever, leukocytosis and abscesses. Abdomen - intestinal perforation, paralytic ileus, lots of possible things... --- Main abdominal thing is pseudo appendicitis... can mimic appendicitis |
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Yersinia pestis is the cause of the _____ ______. |
black plague |
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Main reservoir of Y pestis? |
rodents, classically rats - recently in the US its prairie dogs |
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Humans are the _________ hosts. |
incidental |
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What is the vector for yersinia pestis? |
fleas |
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Symptoms of y pestis? |
Buboes - swollen tender lymph nodes. Once its established the infection, bacteria count rises and more serious diseases occur: abcesses in organs, DIC (caused by endotoxin) and cutaneous hemorrhage, necrosis of digits/other appendages (necrossi is probalby where black death came from). |
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Other virulence factors for y. pestis? |
(endotoxin that was mentioned previously, causes DIC) Exotoxins, and Yersinia associated outer protein (YOPS) |
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YOPs cause what? |
cause macrophage and leukocyte dysfunction by inhibiting phagocytosis and cytokine production. this allows the organism to replicate rapidly and spread. |
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What type of ssecretion system does Y pestis use? |
Type III |
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Treatment for Y pestis? |
Aminoglycocides (streptomycin) in combination with tetracycline. (worker with sai picks up poop. / bicycle wheel) |
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What is the vaccine for Y pestis? |
Killed vaccine.... (not routinely used, so not routinely tested) |
