E. coli and other facultative anaerobes constitute about 0.1% of gut flora, and fecalâoral transmission is the major route through which pathogenic strains of the bacterium cause disease.
Asthma symptoms in children ages 5-11. Common asthma signs and symptoms in children ages 5 to 11 include: 1  Coughing, particularly at night. 2  Wheezing. 3  Difficulty breathing. 4  Chest pain, tightness or discomfort. 5  Avoiding or losing interest in sports or physical activities.
Children under 2 years old can get bronchiolitis. It is more common in males. Infants who are around cigarette smoke or who attend daycare are more likely to get it. Infections are most common in the winter and early spring. Children who have bronchiolitis 2 or 3 times are more likely to have asthma.