FIG. 1.

Amplicons from PCR after separation by electrophoresis in an agarose gel. Lanes: M, molecular weight markers; 1 to 16, samples of cerebrospinal fluid from patients; T, negative control. For each sample, two amplifications were performed: the first with 2 μl of DNA from the CSF sample and the second with 1 μl of DNA from the CSF sample plus 1 μl of DNA from pig cysticerci. In the second amplification, we observed 2 repeat units. All samples were positive except sample 10.