Classification Systems for Streptococci • Hemolysis on blood agar plates – S. pyogenes is βhemolytic (complete) – Viridans streptococci are αhemolytic (incomplete) – Enterococci are γ hemolytic (no hemolysis) • Lancefield grouping based on group specific carbohydrate antigens. Bergey’s Manual of Determinative Bacteriology. Bacterial Classification, Structure and Function Introduction The purpose of this lecture is to introduce you to terminology used in microbiology. Pathogenesis and classification. Group B streptococci hydrolyzes sodium hippurate. Streptococci Group A S. pyogenes Group B S. agalactiae Group C S. equisimitis Group D Enterococcus Lanciefield classification Other groups (E-U) Classification based on CClassification based on C--carbohydrate antigen of cell wall carbohydrate antigen of cell wall Groupable streptococci A, B and D (more frequent) C, G and F (Less frequent) It can also be spread by drinking or eating from a utensil used by an infected person. Differentiates Group B streptococci from other. The lecture will: 1. Cover different classification schemes for grouping bacteria, especially the use of the Gram stain 2. 15.2 CLASSIFICATION STREPTOCOCCI O requirement 2 Aerobes and facultative anaerobes Hemolysis Obligate anaerobes Christie-Atkins, Munch-Petersen (CAMP) test. A substance that causes hemolysis is a hemolysin. zdescribe & compare suppurative & nonsuppurative Infections of streptococci. Most βand some α 15. Streptococci classified into many groups from A-K & H-V One or more species per group Classification based on C- carbohydrate antigen of cell wall Groupable streptococci A, B and D (more frequent) C, G and F (Less frequent) Non-groupable streptococci S. pneumoniae (pneumonia), capsulated, α-hemolysis viridans streptococci e.g. Streptococci of A group are further divided into more than 80 serotypes due to the structural differences of their M protein antigen. Classifies bacteria via evolutionary or genetic relationships. The disease is spread through contact with aerosols produced in a cough or sneeze of an infected person. Historically, classification has been based mostly ... Streptococci Cocci arranged in chains Staphylococci Cocci arranged in clusters Spirochete 9781284032314_CH01_001_016.indd 4 13/02/14 11:53 AM. Biochemical Identification. Hemolysis is the breakdown of red blood cells (RBC). occurs when b … The classification of organisms into categories based on genotypic and phenotypic characteristics is known as tax - onomy. In addition to streptococcal pharyngitis (strep throat), certain Streptococcus species are responsible for many cases of pink eye, meningitis, bacterial pneumonia, endocarditis, erysipelas, and necrotizing fasciitis (the 'flesh-eating' bacterial infections). Classifies bacteria by cell wall composition, morphology, biochemical tests, differential staining, etc. View Notes - Lecture 9 Streptococci ppt from CHEM 1412 at Tarrant County College. Detects the production of enhanced hemolysis that. Brown (1919) introduced three terms alpha, beta and gamma to indicate three types of streptococci based on haemolytic reactions observed on blood agar plates.. Beta-hemolytic Streptococci Bergey’s Manual of Systematic Bacteriology. Bacteria: Classification and Identification. Streptococci CLASSIFICATION OF STREPTOCOCCI AND ENTEROCOCCI Hemolytic pattern: Incomplete hemolysis ( … Strep throat is an infection in the throat and tonsils caused by group A Streptococci. Strep Throat. MICROBIOLOGY MODULE Streptococcus Microbiology 162 Notes zdescribe the spectrum of diseases caused by the various streptococci. Describe the different types of bacteria 3. For beta-hemolytic streptococci other than group A, a 30 ml THB can also be inoculated and placed at 35ΕC for 18 to 24 h. Some strains may take more than one day of incubation, no harm is done by incubating these broths longer than 24 to 72 h. The 30 ml THB … S. pneumoniae and viridans streptococci (e.g., numerous oral streptococci S. mutans, S. salivarius, S. mitis and others) are beyond of Lancefield classification. beta hemolytic streptococci.

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