Chapter 12 Questions and Answers

Chapter 12 - 1 Attack rate used when the occurrence of disease among a population at risk increases greatly over a short period of time Attack rate

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
1. Attack rate – used when the occurrence of disease among a population at risk increases greatly over a short period of time. Attack rate = ((Ill)/ (Ill + Well))*100 Secondary attack rate – the number of cases of an infection that occur among contacts within the incubation period following exposure to a primary case in relation to the total number of exposed contacts; the denominator is restricted to susceptible contacts when these can be determined. The secondary attack rate is a measure of contagiousness and is useful in evaluating control measures. Secondary attack rate = ((# of new cases in group – initial cases)/(# of susceptible persons in the group – initial cases)) * 100 Case fatality rate – the number of deaths that occur in a population of interest during a time period CFR= ((# of deaths due to disease “X”)/(# of cases of disease “X”)) * 100 2. ((14-2)/(20-2)) * 100 = 66.67% 3. Measles – caused by a virus. Spread mainly in institutional settings where people were in close contact with each other. Nowadays, measles are prevented by vaccines. TB – caused by mycobacteria.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/21/2010 for the course HLTH 380 taught by Professor Spitler during the Spring '10 term at Clemson.

Page1 / 3

Chapter 12 - 1 Attack rate used when the occurrence of disease among a population at risk increases greatly over a short period of time Attack rate

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online