Streptococcus pneumoniae

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Streptococcus pneumoniae

Streptococcus pneumoniae

General Information



Streptococcus pneumoniae

Route through the Body


Streptococcus pneumoniae is found worldwide. The common host is the human body, in which it can often cause pneumoniae. It also causes otitis media, bacteremia, meningitis, peritonitis, and sinusitis. The bacteria is most likely to infect the elderly or infants under 2 years old. Symptoms of the disease include sudden chill, fever, cough, pleuritic pain, or sputum with a red/brown rusty color.

Streptococcus pneumoniae is a gram-positive coccus. Usually they are found as diplococcus but they may also occur in short chains or singly. They are nonmotile organisms, they travel through the air or through the human bloodsteams. Its pigmentation when in a colony is a greenish-yellow color. Streptococcus pneumoniae is a fermentative aerotolerant anaerobe and it is usually cultured in media that contain blood, which it needs in order to grow.

The route by which this organism is spread is from human to human in the form of aerosol droplets. When inside the host, the organism’s primary site of pneumococcal colonization is the nasopharynx. From this site it can aspire to the lungs, eventually spread to the blood and traverse the blood-brain barrier to the meninges, once inside the blood it can cause infections throughout the body.


Armando de la UzBiologia Honor11-02

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