0 the parts of the body that air passes through during the act of breathing, consisting of the mouth, nose, throat, and lungs: --
lower respiratory tract infections such as pneumonia
upper respiratory tract infections such as the common cold
According to his parents, there was no episode of upper respiratory tract symptoms or fever for the previous three months.
He had been entirely asymptomatic apart from a mild episode of "upper respiratory tract infection" three weeks prior to this event.
It is progressive and affects the respiratory tract, middle ear and reproductive organs, characterized by recurrent respiratory tract infections, sinusitis, bronchiectasis and subfertility.
Following replication, virus is also released from the apical face of the cell into the airways of the respiratory tract.
Investigation of the effects and aftereffects of naturally occurring upper respiratory tract illnesses on mood and performance.
Associations with respiratory tract infections, contact history, and unfavourable social and economic background are characteristics of many infectious diseases spread by the respiratory route.
Respiratory tract-acquired infections such as measles, influenza and chickenpox resulted in 9798 (4.4 %) childhood deaths in 1901 and only 5 deaths in 2000.
At 14 months of age, the child suffered from an upper respiratory tract infection with fever, rhinitis and cough.
