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Q fever cluster among raw milk drinkers in Michigan, 2011

Kimberly A Signs1, Mary Grace Stobierski, Tejal N Gandhi

  • 1Bureau of Disease Control Prevention and Epidemiology, Michigan Department of Community Health, Lansing, MI, USA.

Clinical Infectious Diseases : an Official Publication of the Infectious Diseases Society of America
|August 16, 2012
PubMed

Insights

Consumers of raw milk in Michigan were found to be infected with Coxiella burnetii, the bacterium causing Q fever. This study highlights a potential risk associated with unpasteurized milk consumption and zoonotic disease transmission.

Area of Science:

  • Microbiology
  • Infectious Diseases
  • Public Health

Background:

  • Q fever is a zoonotic disease caused by Coxiella burnetii.
  • Coxiella burnetii is globally distributed but rarely linked to human illness.
  • Raw milk consumption is a potential route for zoonotic disease transmission.

Purpose of the Study:

  • To investigate evidence of Coxiella burnetii infection in individuals consuming raw milk.
  • To identify a potential source of infection within a specific geographic area.

Main Methods:

  • Serological testing for Coxiella burnetii antibodies.
  • Epidemiological investigation of raw milk consumers.

Main Results:

  • Evidence of Coxiella burnetii infection was detected in a small group of regular raw milk consumers.
  • All infected individuals regularly consumed unpasteurized milk from the same Michigan dairy.

Conclusions:

  • Regular consumption of raw milk from a single dairy was associated with Coxiella burnetii infection.
  • This finding suggests raw milk as a potential vehicle for Q fever transmission.

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