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==Description==

==Description==

'''Antibiotic responsive diarrhoea''' (ARD) describes a clinical syndrome which is caused by alterations in the population of enteric bacterial flora and by changes in the response of the host immune system to these bacteria.  It may occur independently of any other apparent pathological process ('''idiopathic''') but it occurs commonly with a number of intestinal diseases ('''secondary''').  The term 'antibiotic responsive diarrhoea' has replaced the previous description of '''small intestinal bacterial overgrowth''' (SIBO) due to uncertainty over the level at which enteric bacteria could be said to be present in excessive numbers and because an increased number of bacteria is not always the cause of the clinical syndrome described.  The term SIBO is now sometimes taken to mean secondary ARD.   

'''Antibiotic responsive diarrhoea''' (ARD) describes a clinical syndrome which is caused by alterations in the population of enteric bacterial flora and by changes in the response of the host immune system to these bacteria.  It may occur independently of any other apparent pathological process ('''idiopathic''') but it occurs commonly with a number of intestinal diseases ('''secondary''').  The term 'antibiotic responsive diarrhoea' has replaced the previous description of '''small intestinal bacterial overgrowth''' (SIBO) due to uncertainty over the level at which enteric bacteria could be said to be present in excessive numbers and because an increased number of bacteria is not always the cause of the clinical syndrome described.  The term SIBO is now sometimes taken to mean secondary ARD.