The use of a Psoroptes ovis serodiagnostic test for the analysis of a natural outbreak of sheep scab

Parasites & Vectors

Table 2 Distribution of animals classified as positive or negative by ELISA and mean antibody levels during outbreak of sheep scab

Sampling time	Positive	Negative	Other	Mean antibody level	Range	Standard error (SEM)
Pre-outbreak	6	152	2	0.01	0 - 0.11	0.0016
Mid-outbreak	120	34	6*	0.12	0.01 - 1.16	0.01
Post-treatment	90	65	5*	0.08	0 - 0.47	0.0056

Numbers of animals classified as positive or negative for sheep scab based on their ELISA results throughout the outbreak. Positive animals classified as having an OD₄₅₀ value > 0.06. Also shown are the mean ELISA OD₄₅₀ values, the range of values across all 160 animals throughout the outbreak of sheep scab and the standard error associated with each mean.*1 animal died of an unrelated cause, other samples unavailable due to unobtainable serum samples.

ISSN: 1756-3305