Summary of brucellosis serology studies in cattle in Nigeria.

1Range of diagnostic tests and respective number of studies for each test on which individual prevalence values in table have been based (see text).
2Number of studies on which total number of individuals sampled and individual prevalence values have been based.
3Sum of animal sample size for each study for which individual prevalence data is available.
4Number of studies, out of total number of studies on which individual prevalence is based, which report number of herds sampled.
5Minimum estimate of number of herds sampled for each production system category. Not all studies reported number of herds sampled, hence true value must be superior (>) to that in table.
6Range of diagnostic tests and respective number of studies on which herd prevalence values in table have been based (see text).
7Number of studies on which total number of herds sampled and herd prevalence values have been based.
8Sum of number of herds sampled for each study for which herd prevalence data is available.
9Studies sampling extensive and intensive flocks in parallel.
10Value of 41% prevalence corresponds prevalence non-adjusted for sensitivity and specificity (apparent prevalence = [true prevalence (0.879+0.998−1)]+1−0.998]; 0.998 = specificity of RBT*ELISA in test series; 0.879 = sensitivity of test series, see Mai et al. 2012).