I understand that the ELISA IgG test might be able to help cut the haystack down to size (high false positives, and poor reproducibility from lab to lab suggest it is no more than a starting point).
Ndiyayiqonda into yokokuba uvavanyo lweELISA IgG lungakwazi ukuphucula izinga lokusebenza kovavanyo (izinto ezingeyonyani ezininzi, kunye nokusilela kokuvelisa kwakhona kwiilebhu ngeelebhu zibonisa ukuba luyinto engaphaya kwesiqalo).