j Differentiate between the structure pathogenic properties and mechanisms by

J differentiate between the structure pathogenic

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j.Differentiate between the structure, pathogenic properties and mechanisms by which bacteria, viruses and fungi cause disease.
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more resistant than gram positive bacteria to antibiotics wall they contain endotoxins, which are released when the bacteria is lysed. Endotoxins cause fever, hypotension, DIC and septic shock and are not neutralize by antibiotics GRAM POSITIVE BACTERIA Staph aureus Strep pyogenes Strep. Pneumoniae e.coli c. perfringes c diff shigella staph strep bacillus (anthrax) clostridium (tetnus) Some gram-positive bacteria secrete teichoic acid which helps to protect them from complement mediated lysis e they retain the purple gram stain. They lack the extra cell membrane and release exotoxins. There are three types of exotoxins, Type I, Type II and Type III. Type I exotoxins interact with MCH Class II proteins and stimulate the over production and release of proinflammatory cytokines. Type I exotoxins are responsible for food poisoning from staph aureus, toxic shock syndrome from staph aureus, and scarlet fever from strep pyogenes. Type II exotoxins cause damage to cell membranes. Type II toxins may be found in Strep. Pneumoniae, some E coli, and C. perfringes
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