Disease Reservoirs and Transmission Flashcards
Biological Vector
Agent undergoes changes or multiplies while in the vector; these activities are required for transmission
Lyme Disease is an example of what type of disease transmission?
Horizontal - Indirect
Direct Projection Transmission (Droplet Spread)
Wet, large and short range aerosols
_____________________
Sneeze, Cough, Talking
Vector
Living organism that serves to communicate disease
Mechanical Vector
Agent does not multiply or undergo part of its life cycle while in/on the arthropod
Direct Horizontal Transmission
Transmission directly from the reservoir to a susceptible host
Walter Reed
Discovered that Yellow Fever is transmitted by mosquitos
Perinatal Transmission
Transmission during parturition via colostrum
Reservoir
Habitat in which infectious agent normally lives, grows and multiplies
Robert Koch
First isolated Anthrax
Developed Germ Theory
Indirect Horizontal Transmission
Transmission via any sort of intermediary - animate or inanimate
Disease transmission is a result of the interaction between what?
Host
Agent
Environment
Most vectors are _______.
Arthropods
Vertical Transmission
Transmissionf rom a reservoir host to its offspring
Fomite
Object that can be contaminated and transmit disease on a limited scale
Airborne Transmission
Considered to be a form of direct transmission because disease agents do not generally survive for extended periods within aerosolized particles
Congenital Transmission
Transmission of pathogens that can cross the placenta, infect eggs, etc
Indirect Horizontal Transmission can be broken down into transmission by
Vector Transmission
Vehicle Transmision
Types of Vehicle Transmission
Common Vehicle
Fomite
In disease prevention what is more important? To know the mode of transmission or to identify the specific agent?
Knowing the mode of transportation
John Snow
Published evidence that cholera is transmitted by the fecal oral route and by the water supply
Direct Contact Transmission
Skin to skin contact, MM contact, direct contact with a soil reservoir, bite, scratch, etc
In recognizing a reservoir, what three questions need to be answered?
Is it naturally infected with the pathogen?
Can that “reservoir” maintain the pathogen over time?
Can this source transmit the disease to a new, susceptible host?
Types of Vector Transmission
Biological Vector
Mechanical Vector
