Published on September 21, 2015
1. Infectious DiseasesInfectious Diseases Chapter 13Chapter 13 ““Communicable”Communicable”
2. What is an infectious disease?What is an infectious disease? Any disease that is caused by an agentAny disease that is caused by an agent that has invaded the body ---can passthat has invaded the body ---can pass from one living thing to anotherfrom one living thing to another Example: influenza (flu)Example: influenza (flu) Not cancer or heart diseaseNot cancer or heart disease Also known as “communicable disease”Also known as “communicable disease”
3. What causes infectious diseases?What causes infectious diseases? Caused by pathogens (any agent that causesCaused by pathogens (any agent that causes disease)disease) BACTERIABACTERIA single-celledsingle-celled VIRUSVIRUS FUNGIFUNGI use nutrients of living or dead organismsuse nutrients of living or dead organisms Athlete’s foot, jock itchAthlete’s foot, jock itch PROTOZOANPROTOZOAN malariamalaria PARASITESPARASITES Tapeworm, head lice, roundwormsTapeworm, head lice, roundworms
4. What is a bacteria?What is a bacteria? A single cellA single cell Common diseases caused by bacteria:Common diseases caused by bacteria: Strep throatStrep throat Food poisoningFood poisoning Urinary tract-infectionsUrinary tract-infections
5. What is a virus?What is a virus? A microscopic disease causing particleA microscopic disease causing particle consisting of genetic material and aconsisting of genetic material and a protein coatprotein coat Survive by invading a living cellSurvive by invading a living cell Common diseases caused by a virus:Common diseases caused by a virus: COMMON COLDCOMMON COLD FLUFLU COLD SORECOLD SORE MEASLESMEASLES
6. How are infectious diseases spread?How are infectious diseases spread? Person to person contactPerson to person contact Food and waterFood and water EnvironmentEnvironment Through the airThrough the air Animals (mosquitoes, ticks)Animals (mosquitoes, ticks) Contact with contaminated objectsContact with contaminated objects
7. How are infectious diseases treated?How are infectious diseases treated? Bacterial diseasesBacterial diseases AntibioticsAntibiotics Viral diseasesViral diseases No cure!No cure! Medicines help relieve symptomsMedicines help relieve symptoms Fungal diseasesFungal diseases Anti-fungal medicineAnti-fungal medicine Protozoan infectionsProtozoan infections Prescription meds.Prescription meds. Parasitic infectionsParasitic infections DependsDepends Head lice = medicated shampooHead lice = medicated shampoo
8. How do you prevent the spread ofHow do you prevent the spread of diseases?diseases? Get vaccinatedGet vaccinated Keep cleanKeep clean Wash your hands!Wash your hands! Don’t share personal itemsDon’t share personal items Cover your mouthCover your mouth Be on guard outdoorsBe on guard outdoors Wear proper clothingWear proper clothing
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