CHICAGO—The U.S. Department of Agriculture reported two more cases of highly pathogenic avian flu in wild birds on Tuesday, raising risks for potential infections in poultry. The USDA on Friday reported the nation’s first case of a Eurasian H5 type of the virus since 2016 and on Tuesday said all three cases are the H5N1 strain. That strain has caused a wave of outbreaks of bird flu in poultry across Europe and Asia. H5N1 is one of the few bird flu strains that has passed to humans, though U.S. officials said there was a low risk to people from the case confirmed on Friday. The infections are disappointing because it is rare for a Eurasian strain to make its way to North America, said Carol Cardona, a professor of avian health at the University of Minnesota. “Avian influenza viruses tend to stay in their hemisphere,” she said. The latest U.S. …