PPT-Gram-Positive Cocci

Streptococci By Lec Dr Thanaa Rasheed Abdulrahman 6 th lect bacteriology Streptococci of medical importance are listed in Table 1 Species Lancefield Group Typical Hemolysis. Dr. Nariman Sindi. 1. classification. The classification of streptococci is based on:. Hemolysis:. Alpha-. hemolytic. streptococci (. α. -. hemolytic. ):. Incomplete lysis (partial hemolysis) of red blood cells (RBCs) in the agar resulting in the formation of a greenish zone around their colonies.. STREPTOCOCCUS 15.1INTRODUCTIONStreptococci Streptococci are Gram-positive cocci arranged in chains or pairs. They are part ofStreptococcus pyogenes causing pyogenic After reading this lesson, you will Gram positive cocci. Bile-Esculin. Enterococcus. identification. Esculin. .  . Esculitin. + Glucose. esculitin. + Fe  . Ferric. citrate (. dark. . brown. ). Selective. media. Bile . added. A. Introduction – There are multiple criteria by which you can classify an organism. 1. Metabolic Activities (Carbon, Energy & Oxygen sources). A) Recall that microbes may vary in their carbon & energy sources. Bacteria . One of our kingdoms. Bacteria. Bacteria are minute microscopic prokaryotes. They are unicellular organisms, which are usually identified by their specific activities, more than their general . Physical differences & clinical . signifigance. . . Figure 4.8b. Gram- positive bacteria. Gram-negative bacteria. Figure 4.8a. Gram-Positive cell walls. Teichoic acids:. Lipoteichoic acid links to plasma membrane. Staphylococci. Dr. Oruba. Khalid abbas . . . Systemic Bacteriology. Objective : Pyogenic cocci. Pyogenic cocci : Pyogenic means “ pus forming”. Cocci means “spherical bacteria”. They include:. Bacteriology. Systemic Bacteriology. Objective : Pyogenic cocci. Pyogenic cocci : Pyogenic means “ pus forming”. Cocci means “spherical bacteria”. They include:. 1. Staphylococcus (Gram positive). 1. Demonstrate a basic understanding of commonly encountered organisms in the healthcare setting.. Discuss the importance of reviewing and interpreting Microbiology lab results.. Give examples of pathogenic vs. non-pathogenic bacteria.. Department Nursing, Second stage. Lab/6 . Practical Microbiology I . م.م. محمد عبدالرسول دبي. A/Gram + cocci (. Staphylococci and Streptococci. )..  . 1. .. Staphylococci. :. I- General features:. ve Cocci Flowchart This job aid is a component of the free, ondemand CDC training course “Biochemicals and Gram Positive Organism Identification.” Find the course at https://www.cdc.gov/la Streptococci. 1. Asst. Prof.. Shaima’a. Al-. Salihy. Learning objectives:. After this lab. You must be able to:. Describe streptococci under microscope.. Classify streptococcus spp. according to hemolysis pattern>. Neissereae. Medical Microbiology. By:. Asst. Prof. Dr. . Shaima’a. Al-. Salihy. . Neisseriae. Neisseriae. :. The most important species are:. Neisseria . gonorrhoea. (gonococci). Neisseria . meningitidis. Gram Positive. Gram Negative. Gram-Positive bacteria. Gram-Negative bacteria. Cell Wall. A single-layered, smooth cell wall.  A double-layered, wavy cell-wall. Cell Wall thickness. The thickness of the cell wall is 20 to 80 .