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Rinderpest surveillance for recognition of RP free ... - Middle East - OIE

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Principles <strong>of</strong> <strong>surveillance</strong> (cont.)<br />

<br />

8<br />

The sources <strong>of</strong> evidence should be fully<br />

described. In the case <strong>of</strong> a structured<br />

survey, this should include a description<br />

<strong>of</strong> the sampling strategy used <strong>for</strong> the<br />

selection <strong>of</strong> units <strong>for</strong> testing. For<br />

structured non-random data sources, a<br />

full description <strong>of</strong> the system is required<br />

including the source(s) <strong>of</strong> the data, when<br />

the data were collected, and a<br />

consideration <strong>of</strong> any biases that may be<br />

inherent in the system.

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