(I) Most episodes of illness with a fever in children are caused by viral infections, although bacterial infections can also produce a fever. (II) The first symptom of a severe eye infection is usually swollen and red eyelids. (III) In fact, it is often hard to distinguish a bacterial infection from a viral infection. (IV) Though bacterial infections can be serious, they usually respond readily to antibiotics. (V) Prompt diagnosis of a bacterial infection is thus important to ensure prompt treatment.