HIGH PRAIRIE, Alta. — About 2,700 patients — including hundreds of children — need to be tested for HIV and hepatitis because a handful of hospital staff in a northern Alberta farming community administered drugs with dirty syringes for nearly two decades. Health officials said Monday they want to perform blood tests on 1,300 patients who had endoscopy procedures at the High Prairie Health Complex over four years dating back to March 2004. Officials said fewer than five staffers were routinely injecting pain killers into intravenous lines with syringes that had already been used in lines attached to other patients....