ANIMAL RESERVOIRS
ZOONOSIS- TRANSMISSIBLE FROM ANIMAL TO HUMANS
NON LIVING ORGANISMS
SOIL WATER FOOD
TRANSMISSION OF DISEASES
CONTACT TRANSMISSION
DIRECT CONTACT- PERSON TO PERSON INDIRECT CONTACT-
PERSON TO FOMITE TO PERSON DROPLET TRANSMISSION
VEHICLE TRANSMISSION
WATER BORNE DISEASE FOOD BORNE DISEASE AIR
BORNE== MORE THAN A METER
VECTOR TRANSMISSION
BIOLOGICAL TRANSMISSION
MECHANICAL TRANSMISSION
PRE-DISPOSING FACTORS TO DISEASE
GENDER CLIMATE AGE ENVIRONMENT LIFESTYLE OCCUPATION NUTRITION FATIGUE
EMOTIONAL STATE
PRE-EXISTING ILLNESS
DEVELOPMENT OF DISEASE
...
INCUBATION PERIOD
INITIAL INFECTION TO SIGNS AND SYMPTOMSHOST DEFENSES-- DEPENDS
ON THE PERSONS IMMUNITY
PRODROMAL PERIOD
HAVE SYMPTOMS BUT THEY ARE WEEK
PERIOD OF ILLNESS
OVERT SIGNS AND SYMPTOMS
IF YOU DONT OVERCOME THIS PERIOD YOU WILL DIE
PERIOD OF DECLINE
BETTER EACH DAY
MOST SUSCEPTIBLE TO GETTING SECOND INFECTION
PERIOD OF CONVELESENCE
REGAIN STRENGTH
RETURN TO PRE-DISEASE STATE OF HEATH
EPIDEMIOLOGY
STUDY OF WHEN, WHERE, AND HOW DISEASES ARE TRANSMITTED
3 TYPES OF INVESTIGATION
1. DISCRIPTIVE INVESTIGATION --WHERE WHAT THE SOURCE
2. ANALYTIAL INVESTIGATION-- COMPARE DISEASE GROUP TO NON DISEASE GROUP
3. EXPERIMENTAL INVESTIGATION-- THE EXPERIMENT REMOVES ALL BIAS
PATHOGENICITY
ABILITY TO CAUSE DISEASE BY OVERCOMING HOST DEFENSES
VIRULENCE
DEGREE OF PATHOGENICITY
PORTAL OF ENTRY
HOW IT GETS INTO THE BODY
NUMBERS
GREATER THE NUMBERS MOST LIKELY TO OVERCOME HOST DEFENSE
PORTAL OF EXIT
GENERALLY RELATED TO THE SYSTEM IT INFECTED
EXOTOXINS
PRODUCED INSIDE THE CELL AND EXCRETED OUTSIDE THE CELL
EX: NEUROTOXINS, ENTERTOXIN
MOSTLY GRAM POSITIVE
ENDOTOXINS
PRODUCED BY CELL NOT EXCRETED, BUT BECOME PART OF CELL WALL
MOSTLY GRAM NEGATIVE
CYTOCIDAL EFFECT
HOST DIES
NON CYTOCIDAL EFFECTS
HOST CELL LIVE