A Zika virus alert was sounded in Karnataka's Chikkaballapura district after a positive case was found at Siddhlaghatta area, located in Talakayalabetta region of Dibburahalli hobli, District Health Officer (DHO) said. After the positive case was reported in Siddhlaghatta area, a five-kilometre surveillance has been kept and department officials called for urgent meeting, DHO added., India News, Times Now