| laboratory diagnosis and surveillance of human respiratory viruses by pcr in victoria, australia, 2002-2003. | respiratory viruses were identified by the polymerase chain reaction (pcr) in more than 4,200 specimens collected during 2002 and 2003 in victoria, australia from patients admitted to hospitals or participating in an influenza surveillance program. influenza viruses and picornaviruses were important causes of morbidity in both years. additional testing of picornavirus-positive samples suggested that rhinoviruses but not enteroviruses were more likely to be associated with respiratory symptoms, i ... | 2005 | 15543580 |