disease

failure of the body to function normally

pathogen

disease producing microorganisms

infection

invasion of the body by a pathogen and the symptoms that develop in response to the invasion

*signs and symptoms*

localized infection

restricted to a small area of the body

systemic infection

widespread infection throughout the body, usually spread by the blood

bacteria

single cell organisms found everywhere

parasites

require a LIVING host

virus

smallest infectious agent

fungus

plantlike organism- grows best in dark, damp places

mycotic infections

pathogenic fungal infections usually localized

protozoa

single cell, animals like microbes

mosquitoes

are NOT a parasite, they are a predator

gram stain

bacteria classified according to staining characteristics

gram negative

bacteria will not absorb the dye it will pick up a red or Pink stain

culture and sensitivity

if the antibiotic kills the bacteria, the bacteria is sensitive. if the antibiotic does NOT kill the bacteria, the bacteria is resistant

portal of entry

how pathogens enter the body

Parenteral route

includes injuries that penetrate the skin or mucus membrane such as bites, cuts, or surgery

two most common portals of enter or exit are _______ and _______

respiratory and GI (gastrointestinal)

exhale

portals of exit

the way that pathogens leave an infected body

GU

Gastrial urine

GI

Gastrointestinal