What is Infectious Disease?
0Anything that can
spread form
organism to organism
How do they spread?
0 Caused by pathogens
0 Which are organism that can cause
disease
Microscope
view of a
pathogen
Human Pathogens
Bacteria
Virus
Fungus
Bacteria
0 One celled organism
0 Produce toxins (poisons)
0 Diseases caused by bacteria
0 E-coli
0 Lyme’s Disease
0 Staph Infections
Pictures of Staph
Clean your cuts or
this can happen
Viruses
0 Much smaller
than bacteria
0 Can only
reproduce if
inside a cell
Mom I can’t
go to school
Virus
0 Diseases caused by a virus
0 The Flu
0 Common Cold
0 Chicken Pox
0 Human
Immunodeficiency Virus
Fungus
0 Molds, Yeasts
0 Common Fungal disease
0 Athletes Foot
Keep your feet dry
Sources of Pathogens
Person -> Person
Contaminated Object
Animal Bite
Environment
Person to Person
0 Through direct contact
0 Kissing, shaking hands, any sexual act
0 Through Indirect contact
0 Sneezing, coughing
Preventing Person to Person
Transmission
0 Wash Hands Frequently
0 Use Soap and water
0 Sneeze into your arm
0 Wear a condom
Do this for
20+ Seconds
Contaminated Object
0 Any object that you can touch/ingest
Preventing Contaminated
Object Transmission
0 Wear personal protective
barriers
0 Gloves
0 Cook food thoroughly
0 Filter your water
0 Disinfect all surfaces daily
Animal Bite
0 Any bite from an animal can transmit a
disease
0 Common Animal bite related diseases
0 Rabies- Dogs and Raccoons
0 Malaria- Mosquitoes
0 Lyme’s Disease- Deer Tick
Rabies
0 Passed from the biting animal
through saliva
0 Bacteria is in the saliva
0 Causes brain Inflammation
Lyme’s Disease
0 Bacteria lives in wild rodents
0 Passed to humans by tick bites
0 Primarily passed by Deer Ticks
0 Hard to see with the naked eye
0 Lyme Symptoms
Malaria
0 Is a disease carried by mosquitoes
0 Is only found in hot wet places
0 No risk of Malaria transmission to
you
Malaria Map
Environment
0 Caused by alterations to the
environment
0 Usually chemicals in soil or water
0 Can cause death or serious illness
0 Can be prevented
0 Keep chemicals away from water and
soil