Infectious: viral damage to mucosal epithelium
Rotavirus
Caliciviruses
Enteric adenoviruses
Astroviruses
Infectious: enterotoxin mediated
Vibrio cholerae
Escherichia coli
Bacillus cereus
Clostridium perfringens
Infectious: damage to mucosal epithelium
Shigella
Salmonella
Campylobacter
Entamoeba histolytica
Neoplastic
Tumor elaboration of peptides, serotonin, prostaglandins
Villous adenoma in distal colon (nonhormone mediated)
Excess laxative use.
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