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11 Cards in this Set
- Front
- Back
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which salmonella species are most likely to be carriers?
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S. typhi, paratyphi A, and paratyphi B
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Where are the carriers for salmonella hiding out?
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Gallbladdder.
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What disease does Shigella cause?
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Shigellosis or bacillary dysentery
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Which enteric bacteria is most closely related to E.Coli?
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Shigella
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Which species of Shigella most commonly forms Shigellosis?
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Sonnei!!, then Flexneri
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What is the primary virulence factor of Shigella?
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Invasion via actin comets, then toxin production (Shiga toxin). Invasion causes microabscesses in the colon and causes ulceration of the colonic mucosa.
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How is Shigella diff. from Salmonella?
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Shigella uses virulence plasmid instead of pathogenicity islands, Shigella is much more potent, Shigella is non-motile. Shigella doesn't infect the lymph nodes like Salmonella, and doesn't reach blood or cause bacteremia like Salmonella. Unlike Salmonella where antibiotic treatment is avoided, Shigella can be treated w/ antibiotics to shorten duration.
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How is Shigella similar to Salmonella?
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They both use Type III secretion systems to invade the target cells.
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At what stage can Syphillus be visualized?
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only the primary and secondary stage of syphillus is when you can microscopically visualize syphilis
(dark field, flourescent, silver nitrate stain) |
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How many axial fibrils does Treponema have?
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6
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What is the motility feature of spirochetes?
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axial filaments (periplasmic flagella)
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