PREVENTION & CONTROL OF DISEASE & HEALTH CONDITIONS Flashcards
○ kidney disease, heart disease,
respiratory infection, and so on
Organ System
○ these are the factors that caused the disease of the infection, which can be
divided into three (3) subclassifications:
Causative Agent
three (3) subclassifications of CAUSATIVE AGENTS:
■ Biological Agents
■ Chemical Agents
■ Physical Agents
Examples of Biological Agents
Viruses
Riecketssiae
Bacteria
Fungi
Protozoa
Metazoa
Examples of Chemical Agents
Pesticides
FOod Additives
Pharmacologics
Industrial chemicals
Air pollutants
Cigarette smoke
Examples of Physical Agents
Heat
Light
Noise
Radiation
Vibration
Speeding objects
○ “Infectious diseases
Communicable
caused by pathogenic agents (bacteria, viruses, fungi, parasites) which can be transmitted from an infected host to a non-infected but susceptible host
Communicable
caused by pathogenic agents (bacteria, viruses, fungi, parasites) which can be transmitted from an infected host to a non-infected but susceptible host
Communicable
Measles infection, flu,
COVID-19
Communicable
○ “Lifestyle diseases”
Non-communicable
cannot be transmitted from a diseased host to a susceptible one
Non-communicable
Cardiovascular diseases
congestive heart disease
chronic kidney disease
cancer
COPD
Non-communicable
Diseases are classified by their duration of symptoms
ACUTE VS. CHRONIC DISEASES AND ILLNESSES
Duration of Acute Diseases
3 months or less
Peak severity of symptoms occur & subsides within 3 months or sooner
ACUTE DISEASES
Duration of Chronic Diseases
More than 3 months
Recovery is slow and often incomplete
CHRONIC DISEASE
These diseases can either be communicable of
non-communicable
CHRONIC DISEASES
common cold
pneumonia
mumps
measles
pertussis
typhoid fever
cholera
Acute communicable
appendicitis
poisoning
injury ( vehicle crash, fire, gunshot, etc.)
Acute noncommunicable
AIDS
Lyme disease
tuberculosis
syphilis
rheumatic fever - streptococcal infection
hepatitis B
Chronic communicable
AIDS
Lyme disease
tuberculosis
syphilis
rheumatic fever - streptococcal infection
hepatitis B
Chronic communicable
Diabetes
coronary heart disease
osteoarthritis
cirrhosis of the liver due to alcoholism
Chronic noncommunicable
refers to the ability of a biological
agent to lodge and grow in a host
infectivity
refers to an infectious disease
agent’s ability to produce disease
Pathogenicity
has three (3) factors to sum up
the minimal requirements for the
occurrence and spread of communicable diseases in the population
Simplified Communicable Disease Model
Simplified Communicable Disease Model
○ These three (3) factors seem to sum up the minimal requirements for the
occurrence and spread of communicable diseases in the population
Agent
Host
Environment
must be present in order for disease to occur
AGENT:
any susceptible
organism or a single-celled
organism (a plant, animal, or
humans) invaded by an
infectious agent
HOST:
includes all other factors such as physical, biological, or social that inhibit or promote disease
ENVIRONMENT:
: Influenza
must be present for a
person to become ill
with influenza (agent is
the flu virus)
AGENT
“Communicable disease transmission is a complicated
but well-studied process that is best understood through a
conceptual model known as the
chain of infection.
chain of infection.
Pathogen
Reservoir
Portal of exit
Transmission
Portal of entry
Establishment of disease in new host
disease-producing agent such as
the bacteria, virus, fungi, or a parasite, which
leaves its reservoir
PATHOGEN:
through the mouth, nasal
passages, and nose; where pathogens escape
from its reservoir
PORTAL OF EXIT:
fecal-oral route, droplet or
airborne
TRANSMISSION:
seen in a susceptible host;
the way the pathogenic agent will be able to
establish disease in the susceptible host
PORTAL OF ENTRY:
implies the immediate
transfer of the disease agent between the infected and susceptible individuals by direct
contact “such as touching, biting, kissing, sexual intercourse, or by direct projection (droplet spread) of droplet spray onto the conjunctiva or onto the mucous membranes of the eye, nose or
mouth during sneezing, coughing, spitting, singing or talking (usually limited to a distance of one meter or less).”
Direct transmission
implies the immediate
transfer of the disease agent between the infected and susceptible individuals by direct
contact “such as touching, biting, kissing, sexual intercourse, or by direct projection (droplet spread) of droplet spray onto the conjunctiva or onto the mucous membranes of the eye, nose or
mouth during sneezing, coughing, spitting, singing or talking (usually limited to a distance of one meter or less).”
Direct transmission