Infectious Infectious Diseases:Diseases:

Run Away!!!Run Away!!!

Pathogens:Pathogens:Pathogens:Pathogens:o Are the many types of organisms Are the many types of organisms that can that can causecause disease. disease.

o There are There are 44 major human major human pathogens: pathogens: bacteriabacteria, , fungifungi, , virusesviruses, and , and protistsprotists (which are (which are tiny, very simple, unicellular tiny, very simple, unicellular or multicellular organisms).or multicellular organisms).

o Are the many types of organisms Are the many types of organisms that can that can causecause disease. disease.

o There are There are 44 major human major human pathogens: pathogens: bacteriabacteria, , fungifungi, , virusesviruses, and , and protistsprotists (which are (which are tiny, very simple, unicellular tiny, very simple, unicellular or multicellular organisms).or multicellular organisms).

Infectious Infectious Diseases: Diseases:

Some factsSome facts An An infectious diseaseinfectious disease is a is a disease that can be passed from disease that can be passed from one organism to another.one organism to another.

PasteurizationPasteurization: is a heating : is a heating process that kills process that kills microorganisms and is often used microorganisms and is often used in the food preparation in the food preparation business. For example, dairy business. For example, dairy products are usually products are usually pasteurized pasteurized to kill bacteria.to kill bacteria.

How Diseases are How Diseases are Spread (Spread (Gross!Gross!))

o 1.) Person to Person:1.) Person to Person: through through IIndirect ndirect (non-physical) Contact,(non-physical) Contact, like sneezing like sneezing or coughing, pathogens such as or coughing, pathogens such as influenza (flu), colds, and pneumonia influenza (flu), colds, and pneumonia are passed from one person to another. are passed from one person to another.

o Pathogens like influenza and colds can Pathogens like influenza and colds can also be passed through also be passed through DDirect irect (physical) Contact(physical) Contact like shaking hands like shaking hands or kissing.or kissing.

Indirect ContactIndirect Contact

Indirect Contact Indirect Contact (cont.)(cont.)

Direct Direct ContactContact

Spreading Disease Spreading Disease (continued):(continued):

2.) Contaminated Objects:2.) Contaminated Objects: things like things like food, water, or surfaces may harbor food, water, or surfaces may harbor pathogens like colds, influenza, staph pathogens like colds, influenza, staph bacteria, and tetanus. bacteria, and tetanus. (That’s why washing (That’s why washing your hands is so important. You never know your hands is so important. You never know where other’s hands have been).where other’s hands have been).

3.) Animal Bites:3.) Animal Bites: pathogens can be spread pathogens can be spread through bites. Diseases caused by animal through bites. Diseases caused by animal bites include Lyme Disease (ticks), Rabies bites include Lyme Disease (ticks), Rabies (bat or raccoon bites), and Malaria and (bat or raccoon bites), and Malaria and West Nile Virus (mosquitoes).West Nile Virus (mosquitoes).

Diseases contracted from Diseases contracted from Contaminated Objects Contaminated Objects (food, water).(food, water).

Animal Animal BitesBites

Spreading Disease Spreading Disease (continued):(continued):

Spreading Disease Spreading Disease (continued):(continued):

4.) Pathogens in the 4.) Pathogens in the Environment:Environment: some pathogens some pathogens occur naturally in the occur naturally in the environment. For example, the environment. For example, the bacteria that causes bacteria that causes TetanusTetanus lives in soil and water. The lives in soil and water. The bacteria that cause bacteria that cause AnthraxAnthrax and and BotulismBotulism are caused by bacteria are caused by bacteria that live in the soil.that live in the soil.

4.) Pathogens in the 4.) Pathogens in the Environment:Environment: some pathogens some pathogens occur naturally in the occur naturally in the environment. For example, the environment. For example, the bacteria that causes bacteria that causes TetanusTetanus lives in soil and water. The lives in soil and water. The bacteria that cause bacteria that cause AnthraxAnthrax and and BotulismBotulism are caused by bacteria are caused by bacteria that live in the soil.that live in the soil.