What is the incubation period for shigellosis?

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Multiple Choice

What is the incubation period for shigellosis?

Shigellosis typically shows symptoms after a short delay from exposure, because Shigella infections develop quickly once the bacteria are ingested. The usual window is about 12 to 96 hours, with most cases starting within 1–3 days. That makes the option describing 12–96 hours the best fit. Expanding a bit of context: incubation periods help guide outbreak investigations and explain why person-to-person spread in settings like daycares can lead to rapid-onset cases. The alternative time frames are too short or too long for shigellosis—1–6 hours would suggest disease from preformed toxins (not Shigella), while 7–14 days or 3–4 weeks would be unusual for this infection and point to other etiologies.

Shigellosis typically shows symptoms after a short delay from exposure, because Shigella infections develop quickly once the bacteria are ingested. The usual window is about 12 to 96 hours, with most cases starting within 1–3 days. That makes the option describing 12–96 hours the best fit.

Expanding a bit of context: incubation periods help guide outbreak investigations and explain why person-to-person spread in settings like daycares can lead to rapid-onset cases. The alternative time frames are too short or too long for shigellosis—1–6 hours would suggest disease from preformed toxins (not Shigella), while 7–14 days or 3–4 weeks would be unusual for this infection and point to other etiologies.

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