In the 2007 dairy study, what percentage of small dairy operations tested positive for Coxiella burnetii by PCR?

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Multiple Choice

In the 2007 dairy study, what percentage of small dairy operations tested positive for Coxiella burnetii by PCR?

This question tests understanding of prevalence data reported from a study using PCR to detect Coxiella burnetii in small dairy operations. The study found that 69.8% of these operations tested positive, which is about seven in ten. This high PCR positivity indicates widespread presence of the organism in that setting, suggesting substantial exposure or infection risk within small dairy herds and potential environmental contamination. PCR detects the organism’s DNA, so a positive result confirms genetic material was present in the samples tested, reflecting current or recent circulation in those operations. The other percentages don’t match the study’s reported figure, reinforcing that the observed prevalence is around 69.8%.

This question tests understanding of prevalence data reported from a study using PCR to detect Coxiella burnetii in small dairy operations. The study found that 69.8% of these operations tested positive, which is about seven in ten. This high PCR positivity indicates widespread presence of the organism in that setting, suggesting substantial exposure or infection risk within small dairy herds and potential environmental contamination. PCR detects the organism’s DNA, so a positive result confirms genetic material was present in the samples tested, reflecting current or recent circulation in those operations. The other percentages don’t match the study’s reported figure, reinforcing that the observed prevalence is around 69.8%.

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