chemical formula a combination of symbols used to express the chemical components of a substance. empirical formula a chemical formula that expresses the proportions of the elements present in a substance.
The bacteria streptococcus pneumoniae is the most common cause of acute bacterial sinusitis. This type of bacteria can be resistant to the most common types of antibiotics at standard dosages, although there are other antibiotics that can be used to treat the condition.
Bacterial conjunctivitis is caused by infection of the eye with certain bacteria. Bacterial conjunctivitis. 1  Usually begins in one eye and may sometimes progress to the second eye.iral Conjunctivitis. Viral conjunctivitis is caused by infection of the eye with a virus. Viral conjunctivitis. 1  Can be caused by a number of different viruses, many of which may be associated with an upper respiratory tract infection, cold, or sore throat.