Authorities in south China's Guangdong Province confirmed a new H7N9 bird flu case on Sunday. A 39-year-old man, surnamed He, has been hospitalized and is in serious condition, the provincial health authorities said in a statement. The statement said the resident in Dongguan City tested positive for the virus on Saturday in a local hospital, and the result was confirmed on Sunday by the provincial disease control center. No abnormity has been reported from the 53 people who had close contact with the patient, Xinhua quoted the statement as saying. The Chinese mainland has reported 141 human infections of H7N9 so far.