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INFECTIOUS DISEASES
Corrie DiSalvoDiana DuqueKristin HopkinsLizbeth LondonoMarcela Morado
Chapter 28 Lessons 1 & 3 7thGrade
Infectious Diseases
Diseases caused by the growth of pathogenic organisms in the body
Bacteria
A single-celled microorganismAbundant in air, soil, and waterHarmfulRapid Multiplication

Viruses
Smallest known type of infectious agentOne of the worst enemies (HIV)Unique StructureInvades all forms of life
Rickettsias
Way of MultiplyingIts LocationTransmissionExamplesTyphus and Rocky-Mountain spotted fever
Protozoans
Single-celled organisms30 different typesIts Location
Fungi
Simple organismsSaprophytesPrefers dark and damp environmentsInvasion sitesEx: ringworms or athlete's foot.
Transmission
Spread of infectious pathogens
People
Direct contactEx. Hand shake, pregnant women to unborn childIndirect contactEx. Cough, sneeze
Animals
DogsRabiesMosquitoesMalaria and dengue fever
Contaminated Objects
ExamplesEating utensilsGlassesToothbrushDoor knobsPencilsComputer mouse
Environment
Careless disposal of wasteCareless handling of foodsPollution in air and water
What’s wrong with this picture?
Immune Response
Nonspecificvs.Specific Resistance
Nonspecific Resistance
Physical barriersMucus membranes and skinChemical barriersTears, saliva, and acidic digestive juicesBody cellsPhagocytes
Specific Resistance
LymphocytesT-cellsB-cellsAntibodiesMacrophages
Mission: Search and Destroy
Prevention
Immunity and Immunization
Immunity
Active ImmunityThe defense system the body develops to protect one from diseasesPassive ImmunityThe temporary defense that aninfantacquires from its mothers
Immunization
Passive ImmunizationImmediate, short lived protectionActive Immunizationvaccination
Test Your Knowledge
Mother to babyPassive immunityFlu vaccineActive immunizationAcute poisoning treatmentPassive immunizationHepatitis A vaccineActive immunization
Test Your Knowledge Cont.
5. Tetanus vaccineActive immunization6. Chicken poxActive immunity7. Measles, mumps, and rubella vaccineActive immunization
Common Sense Measures
Hand washing
Common Sense Measures
Good NutritionRegular exerciseBathe or shower dailyCover mouth when coughing or sneezingAvoid contact with people who are sickAvoid sharing of utensils
Come out, Come outWherever you are?
Quick Review
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Infectious Diseases - plaza.ufl.edu