FIG. 1.

Nucleotide bands (amplicons) in sera from GWVs and nonmilitary controls. (A) Results for representative samples from three different veterans. Lane 1, poliovirus without RT as a negative control; lane 2, poliovirus-positive control; lane 3, serum from veteran 1; lane 4, serum from veteran 2; lane 5, serum from veteran 3; lane 6, 100-bp ladder. (B) Results for representative samples from seven different nonmilitary controls. Lane 1, 100-bp ladder; lanes 2 to 8, sera from seven healthy controls, respectively; lane 9, poliovirus-positive control; lane 10, poliovirus without RT as a negative control.