Response pattern asymmetry of binocular vision vertical fusion amplitudes in a normal population.

Purpose: To compare the maximum vertical fusion amplitudes in vertical directions (response pattern by respective higher eye), to investigate for possible asymmetry.

Methods: Vertical fusion amplitude (VFA) was measured in one hundred normal adults with normal single binocular vision using a computer based device that produced a gradually increasing, but optically distant test distance, Vertical fusion amplitudes in the vertical left- over-right (L/R, elevation of the left eye above the right eye) pattern direction were compared to the vertical fusion amplitudes in the vertical right-over-left direction pattern(R/L).

Results: The mean VFA was 4.

Effects of portacaval shunting on Schistosoma japonicum infection in chimpanzees: dissociation of pipe-stem fibrosis and glomerulopathy.

Eight of 10 young chimpanzees were infected with the Japanese strain of Schistosoma japonicum. In 6 of these, and in 1 normal chimpanzee, a surgical end-to-side portacaval shunt was constructed during the 8th week of infection. One additional infected chimpanzee was treated successfully with the nitrovinylfuran, SQ 18,506.

Comparative histopathology of schistosome granulomas in the hamster.

When uniform histologic criteria are applied to staging schistosome egg and granuloma development in the hamster liver, the evolution of the egg foci is shown to be monophasic, albeit with considerable variation of the individual cell response. Both real and artifactual egg-granuloma asynchrony are demonstrable. Alternate granuloma stages occur simultaneously within the same single organ, so that necrosis or fibrous scarring may result in some lesions but not in others.