surveillance program detected traces of the virus on the state's Central Coast. The region also has one positive case, as well as another case from western Sydney who visited Avoca Beach recently. The virus was detected at a treatment plant in Kincumber serving the Gosford area on Monday, NSW chief health officer Dr Kerry Chant confirmed on Wednesday. NSW chief health officer Dr Kerry Chant has urged residents of 36 Central Coast suburbs to come forward for testing. Picture: NCA NewsWire / Gaye Gerard Residents from the following suburbs have been urged to come forward for testing: Niagara Park, Narara, Lisarow, Wyoming, West Gosford, North Gosford, Somersby, Kariong, Point Clare, Tascott, Koolewong, Springfield, Erina, Terrigal, Wamberal, Forresters Beach, North Avoca, Avoca Beach, Copacabana, MacMasters Beach, Bouddi, Green Point, Yattalunga, Kincumber, Kincumber South, Bensville, Saratoga, Davistown, Empire Bay, St Huberts Island, Daleys Point, Killcare, Killcare Heights, Hardys Bay, Pretty Beach and Wagstaffe.