Causative agent, mode of transmission, and susceptible host.

Protozoa, fomites, and bacterial.

Portals of entry and exit.

Poor infection control policies and practices.

Lack of immune system and infection.

Health personnel.

Contaminated equipment.

Contaminated air.

Other patients.

All of the above.

Droplet spread.

Direct contact.

Indirect contact.

Airborne mode.

B and C.

Wound drainage.

Central line.

Skin abrasion.

Foley catheter.

Portal of entry.

Reservoir.

Portal of exit.

Infectious Agent.

Host.

Nose.

Hands.

Bacteria.

Stool.

Systemic infection.

Localized Infection.

Hospital acquired infection.

Colonization infection.

Water, food, drinks, and eating utensils.

Direct contact with people and/or body substances.

Coughing, sneezing, or vomiting.

Equipment such as telephones, keyboards, or glucometers.

All of the above.

1800 - 1900.

1990's

2000's.

1980's.