Pneumococcal pneumonia is a common lung infection caused by the organism Streptococcus pneumoniae.
Pnuemococcal pneumonia is one of the most common community acquired pneumonias, and the most common in many areas. The pathogen afflicts all age groups worldwide. A significant number of people are healthy carriers of the less virulent strains of the bacteria.
The clinical presentation of pnuemococcal pneumonia includes fever, cough and malaise and may also include chest pain and dyspnea or tachypnea.
Streptococcus pneumoniae is a gram positive diplococci. Virulent strains of this bacteria can cause many types of infections including pneumonia but also otitis media, meningitis, pericarditis and osteomyelitis.
Radiographic appearances considered classic for pneumoccocal pneumonia include lobar consolidations and air bronchograms in adults and round pneumonia in children however this type of pneumonia can have many different appearances 1,2. CT may reveal lymphadenopathy 5 as well as complications.
- 1. The many radiologic facies of pneumococcal pneumonia. (2012) American Journal of Roentgenology. 137 (6): 1213-20. doi:10.2214/ajr.137.6.1213 - Pubmed
- 2. Rosita M. Shah, Sanjay Gupta, Elin Angeid-Backman, Judith O'Donnell. Pneumococcal Pneumonia in Patients Requiring Hospitalization. (2012) American Journal of Roentgenology. 175 (6): 1533-6. doi:10.2214/ajr.175.6.1751533 - Pubmed
- 3. Franquet T. Imaging of pneumonia: trends and algorithms. (2001) The European respiratory journal. 18 (1): 196-208. doi:10.1183/09031936.01.00213501 - Pubmed
- 4. Kerry-Ann F. O’Grady, Paul J. Torzillo, Kieran Frawley, Anne B. Chang. The radiological diagnosis of pneumonia in children. (2014) Pneumonia. 5 (1): 38. doi:10.15172/pneu.2014.5/482 - Pubmed
- 5. Stein DL, Haramati LB, Spindola-Franco H, Friedman J, Klapper PJ. Intrathoracic lymphadenopathy in hospitalized patients with pneumococcal pneumonia. (2005) Chest. 127 (4): 1271-5. doi:10.1378/chest.127.4.1271 - Pubmed