Costley Module 1 Flashcards
What are the 6 essential features for disease transmission
Infectious agent Reservoir Port of entry Port of exit Mode of transmission Susceptible host
What factors influence development of infection
of organisms
Virulence
Immune status
General physical health and nutritional status of host
What is a reservoir
A place where organism live and multiply
What can serve as a reservoir
Inanimate objects
Insects
Cells
Blood
What are the modes of transmission
Direct
(Person to person)
Indirect
(Indirect object to person)
What contributes to control of dust born pathogens in the office
Surface disinfection
Airborne particles are classified by?
Size
Two types of airborne particles
Aerosols
Spatter
50u
5u
Aerosols are —- and remain in the air —-
Invisible
A Long time
Aerosols are sometimes called
Droplet nuclei
Spatter particles are greater than —-
In diameter and usually fall how far from origin?
50um
2ft
Universal precautions only dealt with transfer of disease through —–
Blood
You should flush lines for — between patients
20-30sec
Less than —– CFU/ml of heterotrophic water bacteria is acceptable
500
What is drug resistant TB
Pt is non compliant in taking medication
TB is transmitted through?
Inhalation of aerosolized droplet nuclei from sputum and saliva
Maximum communicability of TB is usually?
Just before the disease I diagnosed
In TB
Infection of the —- is most common
Lungs
People with active TB can only be seen?
For URGENT dental care and In a facility with an airborne isolation room
Causes of viral hepatitis
Viral/bacterial infections
Toxins
Certain medications
Heavy alcohol use
Hep — and — are spread fecal-oral
A and E
Hep — , —- , —- are spread by blood or other infected body fluids
B
C
D
HepB occurs at —- age
Any
HepB can be spread by what routes
Blood or other body fluid
Inanimate objects that were contaminated
Hep B is transmitted through —- and —- exposure
Percutaneous
Permucosal
Percutaneous includes:
Intravenous
Intramuscular
Subcutaneous
Does hepB have a carrier state
Yes
HepB has an incubation period of
2-6mo
Avg 60-90d
HepB is communicable when?
Before and during clinical signs
HepB vaccine schedule
First one at birth
Second one a month later
Third one 6mo later
HepB vaccine is effective at —%
90+
A person can get protective immunity to HBV if?
Get vaccinated
Or
Antibodies develop after infection
HepC is transmitted by
Blood
Percutaneous exposure
Needle exposure
HepA is passed
Fecal oral
Does hepA have a carrier state
No
Best way to prevent HepA
2-dose vaccine
HepC is primarily transmitted
Parenterally
Transmission of HepC rarely comes from
Mucous membrane exposure to blood
HepD can’t cause infection unless
You have HepB
Herpes viruses occur in —- with high prevalence
Perio pockets
