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.
Do I Have a Sinus Infection. A sinus infection is caused by inflammation of the para-nasal cavities caused by irritation of the mucous membrane. There are four pairs of nasal cavities. Inflammation, irritation and or infection can result in one or more nasal cavities.