Streptococcus (Group A)


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Streptococcus Pneumoniae

Most bacteria come in one of three basic shapes: coccus, rod or bacillus, and spiral.

1. The coccus The cocci are spherical or oval bacteria having one of several distinct arrangements based on their planes of division.

Gram- positive

Kaiser, D. (May 2013) II. The Prokaryotic Cell: Bacteria. A. Sizes, Shapes and Arrangements of Bacteria. Retrieved from

The Organism's M.O

-Attack: The common host is the human body, in which it often does not cause disease but at other times it can cause diseses in particular, pneumonia.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.

-Symptoms of the disease include sudden chill, fever, cough, pleuritic pain, or sputum with a red/brown rusty color.

-Transmission: Person to person through close contact via respiratory droplets.

-Accomplices? Inapparent infections and carrier states are common, and very few infected animals will ever show disease. Despite its periodic detection in large breeding colonies, no outbreaks of S. pneumoniae disease have been reported in rats in 35 years, nor in guinea pigs in 20 years, raising the possibility that previous “outbreaks” were the result of mixed infections of S. pneumoniae together with additional infectious agents.

Ballough, R. Student Presentation on Streptococcus Pneumoniae. Retrieved from

Charles, R. (2011) Technical Sheet. Streptococcus Pneumoniae. Retrieved from

Victims :(

Occurs worldwide, but prevalence is higher in developing than in industrialized countries. Risk is highest in young children, the elderly, and those with chronic illnesses or immune suppression.

Henry, R. (August 01, 2013) Chapter 3 Infectious Diseases Related to Travel. Pneumococcus Disease. Retrieved from

Level of Danger

Each year in the United States, pneumococcal bacteria cause more than 4,800 cases of invasive pneumococcal disease in children younger than five years of age. Among this group, about 5% die from the infection. Of those who survive, some are left with permanent injury.

Facklam, R. (2014) Pneumococcal Disease. Complications and Mortality Rate. Retrieved from


Antibiotics are used to treat pneumococcal disease, but some strains of the bacteria have developed resistance to some of the drugs used against them. Drug resistance can complicate treatment and increase the length of hospital stays.

Facklam, R. (2014) Pneumococcal Disease. Treatment and Care. Retrieved from