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Acute diarrhoea in adults: assessment, dehydration, stool tests, and antibiotics (when needed)

A Canadian clinical summary of acute diarrhoea in adults: assessment, dehydration, stool tests, and antibiotics (when needed), with source-attributed priorities and explicit jurisdiction boundaries.

JurisdictionCanada
Source check2026-08-20
Clinical reviewiatroX editorial team · Clinical editorial review · reviewed 2026-08-20 · due 2027-08-20
AudienceHealthcare professionals practising in Canada
This is an iatroX educational summary of named Canada sources, not an official guideline. It does not replace the complete source documents, local policy, specialist advice or clinical judgement. British Columbia is used as an explicit Canadian implementation example, not as a national rule. Verify the equivalent pathway, formulary and escalation route in the patient’s province or territory.

British Columbia source: bounded use

The exact source covers oral rehydration for adults, commonly after diarrhea, but not diagnostic stool testing or antimicrobial selection. Those wider acute-diarrhea decisions are intentionally outside this summary.
sources for this section:ECBC adult rehydration

Source-attributed clinical priorities

  • Use this British Columbia emergency summary only for oral rehydration of an adult who can drink and does not meet its exclusion criteria.
  • Assess dehydration and screen for shock, sepsis, renal failure, heart failure or an intra-abdominal emergency before an oral rehydration trial.
  • Give an appropriate oral rehydration solution, reassess symptoms and vital signs, and escalate when oral intake fails or risk changes.
  • The linked Emergency Care BC source supports oral rehydration, not a complete diagnostic or antimicrobial algorithm for acute diarrhea.
sources for this section:ECBC adult rehydration

Practical assessment and management workflow

1
Assess alertness, ability to sit and drink, vital signs and clinical dehydration before offering oral rehydration.
2
Exclude shock, sepsis, severe dehydration, acute renal failure, heart failure and a possible intra-abdominal catastrophe from this pathway.
3
Use an oral rehydration solution rather than a high-sugar sports drink and address vomiting when a monitored oral trial remains appropriate.
4
Reassess intake, urine output, symptoms and vital signs and arrange local diagnostic review when blood, fever, prolonged illness or outbreak concern is present.
sources for this section:ECBC adult rehydration

Safety, red flags and urgent escalation

  • Hypotension, shock, peritonism, severe dehydration or inability to drink requires urgent intravenous and diagnostic management.
  • Renal failure, decompensated heart failure or another source exclusion requires an individualized fluid plan.
  • Do not infer stool-testing, antimotility or antimicrobial recommendations from this rehydration-only source.
sources for this section:ECBC adult rehydration

Confirm the local pathway before acting

British Columbia is used as an explicit Canadian implementation example, not as a national rule. Verify the equivalent pathway, formulary and escalation route in the patient’s province or territory.
sources for this section:ECBC adult rehydration

Source and implementation boundary

Read this educational summary with the linked source, current Canadian product information where medicines are involved, and the applicable provincial or territorial pathway. Local formularies, reporting duties, referral routes and service availability can differ.
sources for this section:ECBC adult rehydration

Source documents

Use the linked source documents for complete recommendations, evidence grading, exclusions and implementation detail.

  1. Emergency Care BCOral Rehydration For Adults – TreatmentLast reviewed 2020-01-01 · accessed 2026-08-20
    view source
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