ch11 - Chapter 11 Infectious Disease Topics Public Health...

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Chapter 11 Infectious Disease
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Topics Public Health Principles Public Health Agencies Microorganisms Contraction, Transmission, and Stages of Disease The Body’s Defense against Disease Infection Control in Prehospital Care Assessment of the Patient with Infectious Disease Selected Infectious Diseases Patient Education Preventing Disease Transmission
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Public Health Principles Epidemiology - the study of the patterns of disease in communities Identification and Investigation Index case - the person who first introduced a infectious agent to the population Prediction Prevention Agencies Local Agencies State Agencies Federal Agencies (DHHS, CDC, NIOSH, OSHA)
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Microorganisms (1 of 3) Normal Flora - live inside of us without causing disease Pathogens - organisms capable of causing disease Opportunistic Pathogens
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Microorganisms Bacteria - microscopic single-celled organisms Reproduce independently but require a host for food Common Bacterial Diseases Gram Stains - used to dif cell wall structure/similarity Types of Bacteria - spheres, rods Endotoxins and Exotoxins - toxic waste products released by living bacterial cells Antibiotics - are used to trea infections by killing bacteria (bacteriacidal) or by inhibiting their growth or reproduction (orthostadic)
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Microorganisms (2 of 3) Viruses Very small organisms Obligate Intracellular Parasites (can grow and reproduce only within a host cell) Virus Replication Viral Illness
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Microorganisms (3 of 3) Other Microorganisms Prions - disease producing proteins, folded in such a way that enzymes can’t act upon them Fungi - plantlike: yeasts, molds, mushrooms Protozoa - mobile, single-celled organism Parasites - organism that lives in/on another Pinworms - parasite that can live in the distal colon Hookworms - parasite that lives in the intestine, feeding on blood Trichinosis - intestinal parasite
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Contraction, Transmission, and Stages of Disease (1 of 4) Transmission of Infectious Disease Interaction of Host, Infectious Agent, and Environment effect how diseases are spread Reservoirs - any living creatre or environment that can harbor a infectious agent Direct vs. Indirect Transmission (sneeze vs. toilet seat) Routes of Exposure – Bloodborne, airborne, sexual, fecal-oral, and foodborne Risk of Infection Theoretical (could happen) vs. measurable (has happened)
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Contraction, Transmission, and Stages of Disease (2 of 4)
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Contraction, Transmission, and Stages of Disease (3 of 4) EMS Risk (greater than the average public) Exposure - agent near host Contamination - agent on host Infection - agent in host Factors Affecting Disease Transmission Mode of Entry Virulence - organisms strength/ ability to infect Number of Organisms Transmitted (dose) Host Resistance - host’s ability to fight off infection Other Host Factors - living conditions, health, age, etc.
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This note was uploaded on 03/25/2010 for the course PAR 100 taught by Professor Alan during the Spring '10 term at Miramar College.

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ch11 - Chapter 11 Infectious Disease Topics Public Health...

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