Shigellosis: The Daily PANCE Blueprint

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Shigellosis: The Daily PANCE Blueprint

A 6-year-old boy is brought to clinic with a 3-day history of high fever, abdominal cramps, and frequent bloody, mucous-containing stools. He attends daycare, and several children in his class have similar symptoms. Stool culture is pending, but the clinical picture is suggestive of a Shigella infection. Why should antidiarrheal medications be avoided in this patient?

A. They cause dehydration
B. They cause colon dilation and perforation
C. They can prolong bacterial shedding and worsen the illness
D. They make the stool harder to test
E. They interfere with absorption of oral antibiotics

Answer and topic summary

The answer is C. They can prolong bacterial shedding and worsen the illness

Antidiarrheal medications such as loperamide should be avoided in patients with suspected or confirmed Shigella infection because they slow intestinal motility, which can prolong contact between the pathogen and the intestinal mucosa, potentially worsening symptoms and prolonging bacterial shedding. Shigella is an invasive enteric pathogen that can cause bloody diarrhea (dysentery), fever, and systemic illness, particularly in young children. Supportive care and antibiotic therapy (e.g., azithromycin or ceftriaxone in children) are the mainstays of treatment. Avoiding antimotility agents helps reduce the risk of complications like toxic megacolon.

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Covered under ⇒ PANCE Blueprint Infectious Disease ⇒ Bacterial Disease ⇒ Shigellosis

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