How many serotypes does S. pneumoniae have?

How many serotypes does S. pneumoniae have?

There are 100 known serotypes of Streptococcus pneumoniae, the bacteria that cause pneumococcal disease. Streptococcus pneumoniae are lancet-shaped, gram-positive, facultative anaerobic bacteria with more than 100 known serotypes.

Is S. pneumoniae Group A or B?

The species S. pneumoniae belongs to the S. mitis group streptococci, which are part of the so-called viridans streptococci group, which also includes the S. salivarius, S.

What are the two types of Streptococcus pneumoniae?

Streptococcus pneumoniae can be differentiated from the viridans streptococci, some of which are also alpha-hemolytic, using an optochin test, as S. pneumoniae is optochin-sensitive. S….

How many strains of Streptococcus pneumoniae are there?

There are more than 90 different strains of Streptococcus pneumoniae (S. pneumoniae) bacteria (known as serotypes), some of which cause more serious infection than others. The symptoms of a pneumococcal infection can vary, depending on the type of infection you have.

What Lancefield group is Streptococcus pneumoniae?

Lancefield groups Some streptococci, for example S. pneumoniae, have not been assigned to a group because their antigen extracts fail to react with group antisera. With the exception of S. pneumoniae all the equine streptococci belong to Lancefield group C.

What is Group C Streptococcus?

Group C streptococci (GCS) are livestock pathogens and they often cause zoonotic diseases in humans. They are Gram-positive, in mostly β-hemolytic and facultative anaerobes.

What are the 23 serotypes in Pneumovax?

PNEUMOVAX® 23 is a vaccine indicated for active immunization for the prevention of pneumococcal disease caused by the 23 serotypes contained in the vaccine (1, 2, 3, 4, 5, 6B, 7F, 8, 9N, 9V, 10A, 11A, Page 3 2 12F, 14, 15B, 17F, 18C, 19F, 19A, 20, 22F, 23F, and 33F).

Whats the difference between Prevnar 13 and Prevnar 20?

Prevnar 13 protects against 13 different pneumococcal serotypes. Prevnar 20 contains 7 additional serotypes compared to Prevnar 13. In a recent press release, Pfizer stated that the 20 serotypes contained in Prevnar 20 cause more than 50% of invasive pneumococcal disease cases in older adults.

What classification is Streptococcus pneumoniae?

Streptococcus pneumoniae most commonly causes conditions such as pneumonia, bacteremia, and meningitis….Organism (ORGA)