What is the Streptococcus virus?
What is the Streptococcus virus?
Strep throat is caused by infection with a bacterium known as Streptococcus pyogenes, also called group A streptococcus. Streptococcal bacteria are contagious. They can spread through droplets when someone with the infection coughs or sneezes, or through shared food or drinks.
What bacteria causes Streptococcus?
Group A streptococcal (GAS) infection is caused by bacteria known as Group A (beta-haemolytic) Streptococcus, the most common type of which is Streptococcus pyogenes. GAS is a common infection that can cause sore throats (pharyngitis), scarlet fever or impetigo (school sores).
How does Streptococcus bacteria cause disease?
These bacteria are spread by direct contact with nose and throat discharges of an infected individual or with infected skin lesions. The risk of spread is greatest when an individual is ill, such as when people have strep throat or an infected wound.
What is the classification of Streptococcus?
Bacilli
Streptococcus/Class
Where do Streptococcus bacteria live?
Group A streptococci are bacteria commonly found in the throat and on the skin. People may carry GAS in the throat or on the skin and not become ill.
Where does the Streptococcus bacteria live?
Where do streptococcus bacteria live?
What is the meaning of Streptococcus?
/ ˌstrɛp təˈkɒk əs /. |. any of several spherical or oval bacteria of the genus Streptococcus, occurring in pairs or chains, certain species of which are pathogenic for humans, causing scarlet fever, tonsillitis, etc.
What does Streptococcus look like under a microscope?
Here, however, the majority of species are less than 2um in size. With regards to shape, Streptococci may appear spherical or ovoid in shape. When viewed under the microscope, Streptococci occur in chains (resembling a string of beads) or in pairs.
What is Streptococcus pyogenes infection?
Streptococcus pyogenes is a major human-specific bacterial pathogen that causes a wide array of manifestations ranging from mild localized infections to life-threatening invasive infections.[1] . Ineffective treatment of S. pyogenes infections can result in the postinfectious sequela acute rheumatic fever and post-streptococcal glomerulonephritis.
What is the structure of Streptococcus pneumoniae?
Most streptococci generally have a rigid cell wall with typical Gram-positive peptidoglycan layer, inner plasma membrane with mesosomal vesicles, cytoplasmic ribosomes, and a nucleoid. Some strains including S. pneumoniae and S. pyogenes contain polysaccharide capsule composed of hyaluronic acid (HA).
