The Jorhat district administration has asked the tea garden managements to play a more proactive role to control diarrhoea and other water-borne diseases which are threatening to assume an epidemic form in several tea gardens and adjacent areas in the district. In a marathon meeting held at the conference hall of Jorhat District Rural Development Agency here today, Jorhat Deputy Commissioner Ms LS Changsan stressed the need for maintaining a high alert against gastroenteritis during the next five months.