(Reuters) - Rory McIlroy took a long time to decide he would represent Ireland at the 2016 Rio Olympics but the 27-year-old world number three could now miss golf's return to the Games after a 112-year absence because of concerns over the Zika virus. The Northern Irishman had threatened to skip the Olympics as he agonized over representing Great Britain or Ireland in Brazil but after opting for the latter in 2014, the mosquito-borne disease may lead the four-times major winner to avoid the Games. First detected in Brazil last year, Zika has been linked in that country to more than 1,300 cases of microcephaly, a rare birth defect defined by unusually small heads and something that is clearly a major concern for McIlroy.
