Chapter 11 Outline (edited by Cang Nguyen on Ultimeaciax-NB @ 1-12-2007 9-43-00 PM)

Chapter 11 Outline - Chapter 11 Soilborne and Arthopodborne Bacterial Diseases Introduction 11.1 Soilborne Bacterial Diseases Anthrax Is an

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Soilborne and Arthopodborne Bacterial Diseases Introduction 11.1 Soilborne Bacterial Diseases Anthrax Is an Enzootic Disease o Bacillus anthracis causes anthrax o Anthrax is primarily endemic to large, domestic herbivores, who ingest spores during grazing o B. anthracis produce three exotoxins that work together to cause disease o Inhalation anthrax, also known as woolsorter’s disease, occurs in workers who work with animal hides and wool It is usually fatal if not treated early o Intestinal anthrax occurs through consumption of contaminated, undercooked meat o Cutaneous anthrax occurs through contact of skin abrasions with spore-contaminated animal products A pustule of nectroic tissue forms, and lymph glands in the area may swell o There is a cell-free vaccine available to people who work with livestock o Anthrax is a threat in bioterrorism and biological warfare Tetanus Causes Hyperactive Muscle Contractions o Tetanus is caused by Clostridium tetani o Spores can enter the body through a wound, and produce toxins o Tetanospasmin inhibits compounds needed to inhibit muscle contraction, leading to continuous, uncontrolled muscle contraction o Symptoms include: Trismus (lockjaw) involves spasms of the jaw muscle and clenching of the teeth Opisthotonus involves muscle spasms that cause an arching of the back Spasmodic inhalation and seizures in the diaphragm and rib cage, reducing ventilation o Sedatives, muscle relaxants, and penicillin are used in treatment o Tetanus toxoid is used in vaccination Gas Gangrene Causes Massive Tissue Damage o Gangrene occurs when blood flow ceases to a part of the body o Gas gangrene (myonecrosis) is caused by Clostridium perfringens o Spores enter the body through a severe open wound
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This note was uploaded on 04/17/2009 for the course MIC 201 taught by Professor Lacroix during the Spring '08 term at Rhode Island.

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Chapter 11 Outline - Chapter 11 Soilborne and Arthopodborne Bacterial Diseases Introduction 11.1 Soilborne Bacterial Diseases Anthrax Is an

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