16 Arthropod-Borne and Other Zoonotic Viruses

Feb 19, 2017 by in MICROBIOLOGY Comments Off on 16 Arthropod-Borne and Other Zoonotic Viruses

ARTHROPOD-BORNE ZOONOTIC ARBOVIRUSES VIROLOGY In most cases, the zoonotic viruses were first named after the place of initial isolation (eg, St. Louis encephalitis) or after the disease produced (eg, yellow…

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56 Cestodes

Feb 19, 2017 by in MICROBIOLOGY Comments Off on 56 Cestodes

Clinical effects depend on whether humans are definitive hosts or intermediate hosts Tissue cysts, not intestinal worms, cause serious disease PARASITOLOGY MORPHOLOGY Like all helminths, tapeworms lack vascular and respiratory…

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53 Sarcomastigophora—The Flagellates

Feb 19, 2017 by in MICROBIOLOGY Comments Off on 53 Sarcomastigophora—The Flagellates

Found in flora of vertebrates These organisms are elongated or oval and typically measure 10 to 20 μm in length. They often possess a rudimentary cytostome (mouth aperture) and organelles,…

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27 Mycobacteria

Feb 19, 2017 by in MICROBIOLOGY Comments Off on 27 Mycobacteria

BACTERIOLOGY STRUCTURE The mycobacteria are slim, poorly staining bacilli, which demonstrate the property of acid-fastness. They are nonmotile, obligate aerobes that do not form spores. The cell wall contains peptidoglycan…

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30 Neisseria

Feb 19, 2017 by in MICROBIOLOGY Comments Off on 30 Neisseria

FIGURE 30–1. Neisseria gonorrhoeae. Gram stain of urethral exudate. Note the many pairs of Gram-negative bean-shaped diplococci (arrow) collected in polymorphonuclear neutrophils (PMNs) and free in the purulent material. The…

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23 Antibacterial Agents and Resistance

Feb 19, 2017 by in MICROBIOLOGY Comments Off on 23 Antibacterial Agents and Resistance

Definitions • Antibiotics—antimicrobials of microbial origin, most of which are produced by fungi or by bacteria of the genus Streptomyces. • Antimicrobials—substances used in the treatment of infectious diseases. In…

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13 Hepatitis Viruses

Feb 19, 2017 by in MICROBIOLOGY Comments Off on 13 Hepatitis Viruses

HEPATITIS A VIROLOGY Hepatitis A virus (HAV) belongs to the Picornaviridae (picornaviruses) family and Hepato-virus genus. It is an unenveloped (naked capsid), single-stranded, positive-sense RNA virus with a cubic (icosahedral)…

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24 Staphylococci

Feb 19, 2017 by in MICROBIOLOGY Comments Off on 24 Staphylococci

FIGURE 24–1. Staphylococcus aureus. Gram stain showing the Gram-positive cocci in clusters resembling bunches of grapes (arrows) and neutrophils (arrowhead). (Image contributed by Professor Shirley Lowe, University of California, San…

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