Acute

1. drugs

1.1. Allopurinol

1.2. angiotensin-II receptor blockers

1.3. antibiotics

1.4. Digoxin

1.5. Colchicine

1.6. cytotoxics

1.7. H2-receptor antagonists

1.8. laxatives,

1.9. mg-containing antacids

1.10. Metformin

1.11. NSAIDs

1.12. PPIs

1.13. SSRIs

1.14. statins

1.15. Theothylline

1.16. Thryoxine

1.17. high dose Vit C

2. other

2.1. anxiety

2.2. food allergy

2.3. acute appendicitis

2.4. acute radiation enetritis

2.5. intestinal ischaemia

3. viruses

3.1. Norovirus

3.2. Cytomegalovirus

4. bacteria

4.1. Salmonella

4.2. Campylobacter

4.3. Shigella

4.4. Escherichia coli

4.5. Clostridium difficile

4.6. Yersinia

4.7. Aeromonas

5. parasites

5.1. Cryptosporidium parvum

5.2. Giardia intestinalis

5.3. Entamoeba histolytica

5.4. Cyclospora cayetanensi