This can cause a change in voice and characteristic croupy cough that sounds like a seal or. Ad Croup is a condition that causes swelling around the vocal chords resulting in a. 2 Wheezing voice and numerous other symptoms. . Symptoms are the same as a mild cold or upper respiratory infection including fatigue runny nosecongestion sneezing. During the winter 2005-2006 all infants. Croup is also a type of cough which produces a harsh barking type of. Learn More about Respiratory Syncytial Virus in Infants on the Offical HCP Website. Whooping cough is the result of a bacterial infection that attacks the lungs and breathing tubes. 3 Stages of Whooping Cough. The disease is spread by uncovered coughs and sneezes as well. Ad Health Care Providers Learn about the Risks that RSV Poses in Infants. Kim Onufrak said croup mostly affects the ages of babies that are 6 months to toddlers that are 3-years-old. ...