Orris

Definition, types ,etiology,pathophysiology,clinical features, diagnostic criteria and management in detail for diarrhoea

Reading File
Finding Sources
Finding Sources
Reading File
Reading File
Reading File
Reading File
Reading File
Reading File
Reading File
Finding Sources
Finding Sources
Reading File
Finding Sources
Finding Sources
Reading File
Finding Sources
Finding Sources
Finding Sources
Reading File
Reading File
Reading File
Reading File
Searching PubMed

"diarrhea" AND "management" AND "guidelines"

This is a comprehensive, textbook-level overview of diarrhoea compiled from multiple authoritative sources. Here is a brief orientation to the sections covered:

What Was Covered

1. Definition

WHO definition (≥3 loose stools/day), quantitative threshold (>200 g/day), and the critical physiological context - 9 L of fluid enters the gut daily, yet only 100-150 mL is excreted normally.

2. Types (Classification)

  • By duration: Acute (<14 days), Persistent (14-28 days), Chronic (>4 weeks)
  • By mechanism: Secretory, Osmotic, Inflammatory/Exudative, Malabsorptive/Fatty, Motility-related, Psychogenic
  • By stool character: Watery, Bloody (dysentery), Fatty (steatorrhoea) - each pointing to different aetiologies

3. Etiology

Full breakdown across viral (rotavirus, norovirus), bacterial (cholera, Shigella, Salmonella, C. difficile, STEC), protozoal (Giardia, Entamoeba, Cryptosporidium), and non-infectious causes (IBD, drugs, malabsorption, endocrine, surgical, functional), including special populations (AIDS, travellers, diabetics, hospitalised patients).

4. Pathophysiology

Detailed mechanisms: enterotoxin-mediated hypersecretion (cAMP/cGMP pathway), mucosal invasion and inflammation, osmotic mechanism (virus-damaged microvilli + bacterial fermentation), and motility disturbances.

5. Clinical Features

General symptoms, dehydration severity grading table, and stool characteristics as diagnostic clues (rice-water stools, dysentery, steatorrhoea, nocturnal diarrhoea).

6. Diagnostic Criteria

Full algorithmic approach - history, physical examination, laboratory tests (fecal osmotic gap formula, fecal leukocytes, stool culture, O&P, endocrine screens), imaging, and a decision algorithm for acute vs. chronic diarrhoea.

7. Management

  • Rehydration: ORS composition and physiological rationale (Na-glucose co-transport), IV fluids for severe cases
  • Antimotility agents: Loperamide, diphenoxylate, bismuth, octreotide, cholestyramine
  • Antibiotics: Pathogen-specific table with drug choices and important caveats (avoid in STEC)
  • Specific conditions: C. difficile (vancomycin/fidaxomicin/FMT), IBD, microscopic colitis, VIPoma
  • Adjuncts: Zinc supplementation (WHO-recommended for children), probiotics (recent 2024 meta-analysis support)
  • Hospitalisation criteria: Red flag indicators
This is a shared conversation. Sign in to Orris to start your own chat.