Results of studies utilizing supplementary methods for assessment of O. volvulus infection (serology, polymerase chain reaction, circulating antigen).

an = number of persons examined.bOncho + = No. of persons with positive onchocerciasis infection status; Oncho − = No. of persons with negative onchocerciasis infection status.cNumbers of persons examined differed slightly between reports from this study. Data for skin snip results alone are presented as given in reference [37], and for skin snip and skin PCR results combined as given in reference [36].