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Doctors Medicines MCQs Q&A

  1. Standardised rates
  2. Agent, host and environment
  3. Rates, ratio and proportion
  4. Incidence, prevalence and trends of disease
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1 Answers

Option 2 : Agent, host and environment

concept-

  • The epidemiological triad is the traditional model of infectious disease causation. 
  • It has three components:-
  1. An external agent.
  2. Susceptible host.
  3. Environmental factor.
  • That interrelates a variety of complex ways to produce disease and alter production and utility in animals.

Explanation-

  • Agent -> factor necessary for disease to occur microorganism, chemical substance, radiation
  • Host -> person or animal that is infected by the agent,susceptible host is - age, sex, race,or genetic immune status, occupation.
  • Environmental factor -> extrinsic factor affects agent and opportunity for exposure such as climate, climate changing enhance pathogen, sanitation, housing, health services, travel.

  • Standardized rate -> standardized rate is statistical measures of any rates in population. These are adjust the vital distance between population and that may affect their birth rates or death rates.
  • Rates, ratio and proportion -> a ratio compares to magnitude of two quantities have different units, ratio is called a rate, a proportion a statements of equality between two ratios.
  • Incidence, prevalence and trends of disease -> incidence refer to number of new cases that develop in a given period of time, prevalence is statistical concept referring to number of cases of a disease that are present in particular population in a given time
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