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.
Conjunctivitis of the bulbar and/or palpebral conjunctiva can be caused by allergies, toxins, fungi, viruses, or bacteria. Bacterial conjunctivitis due to gram-positive bacteria such as Staphylococcus aureus or Streptococcus pneumoniae is generally milder than conjunctivitis caused by gram-negative bacteria. Mild conjunctivitis is usually benign and self-limited and can be monitored without treatment or easily treated with antibiotics.