Differentiating the cause of wheezing in infants.

It cannot be emphasized too strongly that all infants who wheeze do 
not have asthma. Because of the life-threatening consequences of failure to 
detect some of the clinical entities that present with wheezing, the 
clinician should thoroughly investigate the infant who wheezes. Cases illustrating some 
causes of wheezing, additional causes of wheezing, and approaches to diagnosis 
are discussed. 