Adenoviruses are viruses that usually infect the tissue lining of the respiratory tract.
Depending on the type of infection, they can cause other illnesses, like gastroenteritis, conjunctivitis, cystitis, and rashes. Overcrowding and stress during an Adenovirus infection can cause acute respiratory disease. Symptoms of adenovirus infection can be similar to the common cold or even pneumonia, croup, and bronchitis. Other symptoms include inflammation of the pharynx, or sore throat, inflammation of nasal membranes, or a congested, runny nose, cough, swollen lymph nodes and illness similar to the flu. The infection can also cause bronchitis and in children under 3 years old, adenovirus can affect the lower respiratory tract, causing bronchiolitis, croup, or viral pneumonia.