Causes of Infectious Diseases Spread of Diseases Defense against Diseases STD’sCommon Information

Smallest know type of infectious agent

viruses

Single celled microrganism

Bacteria

ORGANISMS THAT RESEMBLE BACTERIA BUT INVADE CELLS LIKE VIRUSES

Rickettsias

Organisms that feed off dead animals, insects, and leaves

Fungi

These single cell organisms are larger than bacteria and are most common in tropical areas.

Protozoams

When pathogens are spread by physical contact

Direct Contact

When pathogens are inhaled

Indirect

Causes rabies and malaria

Animals or insects

Pathogens are spread by touching

objects

Causes the spread of pathogens through food, water, soil and even air

Environment

Organism that may cause illness often called “Foreign Invader”

Pathogen

This barrier is the first line of defense against invading pathogens

Physical

Barriers that include tears and saliva

Chemical

When phagocytes engulf and destroy pathogens

Phagocytosis

Type of white blood cell that fights pathogens

Lymphocytes

Best way not to catch STD’s

Abstinence

These are pink or reddish with cauliflower like tops

Warts

Blister like sores in the genital area

Herpes

Caused by a small bacterium called a spirochete. It has four stages

syphillis

Tiny insects that attach themselves to skin and hair in the pubic area

Lice

Viral infection that causes stuffy, runny nose, and sneezing

cold

Viral infection that causes chills, fever, headache, muscle ache, and weakness

Flu

The immunity your body develops to protect you from disease

Active immunity

Is a bacterial infection of the throat

Strep

This is known as the kissing disease and is a viral infection

Mono