 The diarrhoea manifested as loose stools that were white, malodorous  and flatulent, and the disease was intractable and liable to periodic return.
<fluency>  The diarrhoea manifested as loose stools that were white, malodorous  and flatulent, and the disease was intractable and liable to periodic return.
 The diarrhoea manifested as loose stools that were white, malodorous , and flatulent, and the disease was intractable and liable to periodic return.