The difference between diarrhoea and dysentery is quite clear; but the appearance of blood in stool or bloody diarrhoea is a very confusing term when compared with dysentery. Are they different in the amount of blood or their etiology or pathogenesis or something else. I searched a lot in the internet and medicine and pathology books but nowhere I could find a straight answer. If anyone knows about it please reply with proper reference and values (if its about the amount).

  • $\begingroup$ I think dysentery is always associated with infection but bloody diarrhoea can happen because of many other aetiological reasons. (Although, etymologically, dysentery just means an upset gut). $\endgroup$ – WYSIWYG Sep 2 '16 at 8:44
  • $\begingroup$ I am not too sure that's why I am commenting. I'll verify if this is true and then post as an answer. $\endgroup$ – WYSIWYG Sep 2 '16 at 10:36

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