The microtechnique was compared to the conventional macrotechnique for intratypic serodifferentiation of 28 type 1 and 3 poliovirus strains by the method of comparison of neutralization indices. The results of the tests showed a high correlation between the neutralization indices – 0.931 and 0.971 after incubation periods of three and five days, respectively – and all the strains were equally identified by both techniques studied. It is concluded that the microtechnique can be used as an alternative of the macrotechnique […]