NR 442 QUIZ 2 QUESTIONS & VERIFIED COMPLETE SOLUTIONS 100%

NR 442 QUIZ 2 QUESTIONS & VERIFIED
COMPLETE SOLUTIONS 100%

Epidemiological Triangle

Basic model to study health problems

3 factors ; host, environment, and agent

Disease is produced by exposure to a susceptible host to a noxious agent in the presence of
environmental factors that aid or hinder agents of disease




Stages of infection

1. An infectious agent invades a host

2. Latency ( agent replication before it can be shed)

3. Communicable period ( shedding of agent- no s/s)

4. Incubation period (time from invasion to s/s 1st appear)




Endemic disease

The usual amount

Constantly present in a population or region with relatively low spread




Epidemic disease

Rate exceeds the usual amount

A sudden increase in cases spreading through a large population

, Pandemic

Sudden increase in cases across several countries, continents, or the world




Reservoirs

The environment where the pathogen lives and multiplies




Pathogenic agent

reservoir

portal of exit

transmission

portal of entry

host susceptibilty

Chain of Infection




direct

indirect

Modes of transmission




human

animal