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Bates Microbio-18y

Exam 4-Chapters 14-18

QuestionAnswer
Advantage of herd immunity? If there is a lot of people in the group are immune to the disease effecting the herd, you can stop the epidemic
Contributiing factors for emerging infectious diseases. (Name & examples for each) 1) Genetic recombination- E.coli 0157, Avian Flu 2) Animal Control Measures- Lyme Disease 3) Public Health Failure- Diptheria 4) Inappropriate use of abx & pesticides- Abx resistant strains
What is the importance of ID50 & LD50? Indicates the degree of virulence
What is difference in ID50? The dose necessary to cause infection in about 50% of subjects
What is difference in LD50? The dose necessary to kill about 50% of subjects
What are the principal portals of entry & exit for pathogens? 1) Mucous Membranes; Eyes, nose, ear, uretha, vagina 2) Skin; Insect bite, Broken skin 3) Parental route; placenta
List stages of inflammation: 1) Acute phase protiens 2) Vasodilation 3) Redness 4) swelling 5) pain 6) heat
Humoral Immuity Immunity brought about by antibodies
Cellular Immunity activation of phagocytosis, natural killer cells
IgG -Half life=23 days -Protects fetus & Newborn
IgM -Half life=5 days -Agglutinates microbes; first Ab produced in response to infection
IgA -Half life=6 days -Mucosal protection
IgD -Half life=3 days -On B cells, intiate immune response
IgE -Half life 2 days -Allergic reactions; lysis of parasitic worms
Classify Leukocytes Natural Killer cells Granular leukocytes destory cells that don't express MHCI
Created by: arichardson_14
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