Sera reacting against multiple tic-preferentially-recognized antigens.

(a)number of antigens reported in Table 3 simultaneously recognized by the same serum. (b)percentages of positive sera (number of positive sera/total sera tested) simultaneously recognizing the number of antigens indicated in the first column. (c)P values of Tic versus Pharyngitis calculated with two-tailed χ2 test. (d)P values of Tic versus No Tic calculated with two-tailed χ2 test.