Do Now What do you think it means to “catch” a cold? Jot down one or two sentences to explain your answer.

Chapter 12 Communicable Diseases Cause, Transmission, Prevention, Immune System

Communicable Disease A disease that can be spread to a person from another person, an animal, or an object

Causes of Communicable Disease Viruses (AIDS, Chicken Pox, Cold) Bacteria (Lyme disease, Strep Throat, Pink Eye) Fungi (Athlete’s foot, Ringworm) Protozoa (Malaria)

Communicable Diseases are spread… 1.Direct contact with others 2.Indirect contact 3.Contact with animals/insects 4.Contaminated food/water 5.Contact with someone else’s blood 6.Sexual contact

Infection A condition that occurs when pathogens enter the body, multiply, and damage body cells.

Do Now List some of the signs that let you know when you have come down with an illness

5 Major Barriers Tears Saliva Skin Mucous membranes Stomach acid

Response of the Immune System 1.Pathogen invades the body 2.T-cell identifies the pathogen as an intruder 3.T-cells multiply and activate B-cells 4.B-cells multiply 5.Some B & T-cells become memory cells 6.B-cells release antibodies/T-cells attack and destroy invader 7.Memory B & T-cells remain in system so that next time they move swiftly and destroy

Do Now List some risk factors that make it more likely for people to catch a cold. Which of these risk factors can you control?

Common Communicable Diseases Chicken pox Measles (rash) Mumps (swollen glands) Mononucleosis (lymph nodes) Hepatitis (Liver) Tuberculosis (Lungs) Pneumonia Strep Throat

Difference Between Cold and Flu Cold Stuffy nose Runny nose Sore throat Tired Body aches Flu Fever Chills Fatigue Headache Muscle aches Respiratory symptoms

Do Now Where could you go to get reliable information about sexually transmitted diseases? Write down one or two sources.

Sexually Transmitted Infections Infections that are spread from person to person through sexual contact.

Common STI’s Chlamydia – genital discharge, burning sensation, infertility Genital Warts – growths, bumps, genital area – no cure Genital Herpes – painful blisters – no cure

Common STI’s Gonorrhea – thick, yellow discharge, sterility Syphilis – painless sore, brain damage, heart disease, death Hepatitis B – liver disease

HIV Virus that causes AIDS

AIDS Deadly disease that interferes with the body’s ability to fight infections 10 years before showing symptoms it causes damage to the immune system.

HIV not spread… Swimming pool Sharing utensils Coughing/sneezing Donating blood Hugging/shaking hands Mosquito, insect bites Using same towel, comb Using same toilet, phone, shower

HIV is spread… Sexual contact Contaminated needles Other modes of transmission