| morphological differences between venezuelan and african microfilariae of onchocerca volvulus. | comparative morphological and biometric characteristics of microfilariae of onchocerca gutturosa and o. volvulus from different geographical areas (upper orinoco, venezuela; togo; liberia) were assessed. "stepwise" discriminant analysis and mahalanobis estimators were applied to measure distance between populations. the results indicate a strong similarity between the two strains from the upper orinoco (venezuela) and the togo strain, as well as a clear separation between these strains and that ... | 1988 | 3235798 |