Health

shows how one catches a disease and how it can be transferred to another person. It is a cycle. If the cycle is not broken, it goes on

and on.

refer to microorganisms that cause diseases.

• Disease Agents

• Reservoir

• Portal of exit

• Mode of transmission

refers to any living or nonliving thing in which the diseasen agent may live, it can be humans or animals.

• Disease Agents

• Reservoir

• Portal of exit

• Mode of transmission

refers to where the disease agent gets out from the reservoir.

• Disease Agents

• Reservoir

• Portal of exit

• Mode of transmission

refers to the way the disease agent goes to

another reservoir.

• Disease Agents

• Reservoir

• Portal of exit

• Mode of transmission

is where the disease agent gets into the new reservoir.

• Disease Agents

• Reservoir

• Portal of exit

• Portal of entry

is the living thing where

the disease agent may transfer to.

• Disease Agents

• Reservoir

• Portal of exit

• Susceptible host

There are disease agents

Portal of exit

A person with cold, may transfer

the virus directly to another by shaking

hands and by hugging or kissing.

• Direct Transmission

• Indirect Transmission