PPT-Gram-Negative Outer Membrane

Figure 413c Figure 413bc GramPositive GramNegative Cell Walls Cell Walls Thick peptidoglycan Teichoic acids In acidfast cells contains mycolic acid Thin peptidoglycan No teichoic acids. Part-2. Sulfur Dioxide(SO2) and Sulfites(SO3). Sulfur dioxide, Sodium sulfite(Na2SO3), Sodium bisulfide(NaHSO3), and Sodium . metabisulfite. (Na2S2O5) are used to control microorganisms and insects in soft fruits, lemon juices, beverages, sausages, pickles, and fresh shrimp.. Last day. Brief . introduction to bacteria, . Archaebacteria. , and bacterial culturing media. . Today. We will start by looking at our cultures, and providing colony descriptors. . We . will learn about the Biology of Bacteria. Goals and Objectives:. Exercise 38: Cultural Characteristics . (Gelatin) . put on ice!!!. Exercise . 40: Hydrolytic and . Degradative. . Reactions. (Urea). Exercise 41: Multiple Test Media. (SIM). 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.  . Bacteria form a large group of parasitic, saprophytic, and free-living microorganism .  . 1. Bacterial cell wall (protects against osmotic damage).  . Bacterial cell is prokaryotic. Contains high concentration . . William H. Benjamin PhD. Clinical Pathology. E. Coli. O157:H7 spinach. 204 cases, 8/2006 – 10/2006 103 hospitalizations, 31 HUS, 3 deaths. 26 states. Since 1995, there have been 19 outbreaks of foodborne . Internal Structures:. cytoplasm. nucleoid. ribosomes. Boundaries:. cell membrane. cell wall. capsule. Appendages:. flagellum. pili. Shapes of Bacteria. Bacteria Identification Criteria. Shapes. Bacteriology: . study . of . bacteria. Mycology: . study . of . fungi. Protozoology: . study . of . protozoa. Phycology (or algology): . study . of . algae. Parasitology: . study . of . parasites. Immunology: . Differentiate bacteria into two large groups (the Gram Positive and the Gram negative).. Gram status is important in medicine; the presence or absence of a cell wall will change the bacterium's susceptibility to some antibiotics. 1 The slide is washed in water; excess water is removed using a blotting paper, dried in air and heat fixed before observing under microscope. Those bacteria that hold on to primary dye-iodine comple Faculty: Dr. Rakesh Sharda OBJECTIVES OF STAINING Improves visibiltiy by greater contrast between the organism and the background, differentiate various morphological types (by shape, size, arrangeme Neisseria. spp.. Gram’s negative Diplococci . Kidney shape with flat opposing edge. Neisseria. spp.. PATHOGENIC:. N. gonorrhoea. (gonococci, G.C) . . Gonorrhoeae. .. N. meningitidis. . Gram positive . bacteria . Bacteria. Example. Gram positive cocci arranged in.  . Cluster. Staphylococcus.  . Chain. Streptococcus.  . Pairs, lanceolate shaped. Pneumococcus.  . Pair or in short chain, spectacle eyed shape. jabar. . Aldhaher. Neisseria. The genus Neisseria contains two important pathogens: . 1. Neisseria meningitidis . 2. Neisseria gonorrhoeae. . N. meningitidis causes meningitis and meningococcemia. .