A new crisis has erupted in Sri Lanka's northern war zone with a virtual epidemic of dengue and chikungunya viral fever among troops due to the heavy rains and resultant floods, Xinhua quoted a leading local newspaper as saying today. The Sunday Times disclosed that about 500 troops affected by the viral flu were being treated at hospitals in the Anuradhapura district. Health officials said the crisis had arisen one month ago and health education and viral flu prevention activities were conducted in the affected areas and mosquito nets being widely distributed. Anuradhapura Teaching Hospital Director Sarath Weerabandara said the outbreak began when unexpected heavy rains hit the area including the war zones. He said blood samples had confirmed that the virus was largely chikungunya.