Sampling

Cryptosporidiosis in Georgia

Investigation of a large, community-wide outbreak of cryptosporidiosis in Georgia in 1987 that resulted from contamination of a public water supply that met all standards in effect at the time.

 

Objectives:

After completing this case study, the student should be able to:

1. discuss epidemiologic clues indicative of a waterborne disease outbreak as opposed to a foodborne disease outbreak;

2. describe a boil-water advisory and discuss problems that might be encountered in issuing such an advisory;

Investigation: 
Outbreak
Country: 
United States
Year: 
2010
Author (s): 

Jeanette Stehr-Green

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Riverina

Conduct of a rapid health assessment / cluster survey (including anthropometric measures) of an internally displaced population in a fictional African country.

 

Objectives:

Investigation: 
Other
Year: 
1997
Author (s): 

Michael Toole

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Rapid Assessment of Health Status and Preventive Medicine Needs of Kampuchean Refugees in Thailand

Development of surveillance system to identify health problems among Kampuchean (Cambodian) refugees in 1979 and target interventions accordingly.

 

Objectives:

Investigation: 
Other
Country: 
Thailand
Year: 
1992
Author (s): 

Jeanette Stehr-Green

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A Measles Outbreak in a Highly Vaccinated Population (“Measles in Burundi”)

An outbreak of measles occurred in health sector Muyinga (Burundi), several years into an apparently successful vaccination program.  This case study addresses estimation of vaccine coverage and vaccine efficacy in the field.

 

Objectives:

  • Discuss methods for estimating vaccination coverage;
  • Describe the difference between a convenience sample and a probability sample;
  • Describe the sampling method used in WHO-EPI surveys; and
  • Calculate and interpret vaccine efficacy.
Investigation: 
Outbreak
Country: 
Burundi
Year: 
1991
Author (s): 

Robert Chen, Bernard Morniere and Richard Dicker

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A Mixed Bag in Michigan ("PBBs in Michigan")

Based on the exposure of farm animals to feed contaminated with polybrominated biphenyl in 1973, and the subsequent concerns about human health.

 

Objectives:

  • Describe the role of each government agency involved in a contaminated food situation;
  • Discuss different options for studying the human health effects following an environmental exposure;
  • Calculate sample size requirements for a community survey;
  • Discuss the reasons for and limitations of a registry following an environmental exposure.
Investigation: 
Other
Country: 
United States
Year: 
1981
Author (s): 

Clark Heath

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Investigation of a malaria outbreak in a highly endemic city - Par, Brazil, 2009.

Abstract Text:

Background: On October 2009 the Brazilian National Malaria Control Program (NMCP) was notified of an increase of malaria cases in Anajs, located in the Amazon region. The average Parasite Incidence Rate (PIR: malaria positive smears/population) from 2003 to 2008 was 478/1,000 inhabitants. We performed an investigation to confirm the outbreak, describe the timeliness of case detection and treatment, and recommend control measures.

Year: 
2009
Author (s): 

Authors: Gilmara L. Nascimento1, A. Castro1, A. N_brega1, W. Araujo1, M. N_brega2 1. Brazilian Field Epidemiology Training Program (EPISUS), Center for Strategic Information and Response in Health Surveillance (CIEVS), Department of Epidemiological S

Presenter (s): 
Ms. GILMARA NASCIMENTO
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