Pino L A, Morales G, Matinella L
Laboratorio de Parasitología, Instituto de Investigaciones Veterinarias, CENIAP-FONAIAP, Estado Aragua, Venezuela.
Bol Chil Parasitol. 1997 Jul-Dec;52(3-4):61-6.
By means of the silver impregnation of two lots of Schistosoma mansoni cercariae belonging to the strains: JR (32 cercariae) and C5 (45 cercariae), the number and pattern of disposition of the argentophillic papillae were determined with the following results: Average number of total dorsal papillae: 12.1 (JR strain) and 12.0 (C5 strain); the variation coefficients in this surface were less than 4% (JR strain) and bigger in JR than C5 strain. Average number of total ventral papillae: 12.15 (JR), 11.97 (C5); maximum value of the variation coefficient: 6.4% (JR), higher in JR than C5 strain. When the ventral surface was classified in four quadrants, the average number of papillae by quadrant was: quadrant A: 1.15 (JR) and 1.06 (C5): B: 1.06 (JR) and 1 (C5); C: 4.97 (JR) and 4.96 (C5); D: 5.03 (JR) and 4.98 (C5). The variation coefficients were higher in the A and B ventral quadrants, reaching maximum values of 31.9%, and 61.0% for the posterior quadrants C and D. When the ventral surface was divided in three equal parts for determining the position of the most variable papillae of this area, the greatest value of the variation coefficients obtained were for the 2nd thirds of the cercariae: 89.8% and 76.8% for C5 strain and 43.5% and 56.8% for JR strain. In relation to the total lateral papillae, the average numbers were: 17.0 (JR) and 16.6 (C5), with a maximum value of variation coefficient of (8.1% (C5). The average total number of papillae of the tail were: 25.6 (JR) and 26.1 (C5) for the ventral surface and 20.72 (JR) and 21.33 (C5) for the dorsal papillae. The comparison between the percents of the cercariae of two S. mansoni strains with more than 1 papillae on the anterior ventral quadrants A or B (94% JR and 34% C5), resulted with significant differences (P < 0.05).
通过对属于JR（32只尾蚴）和C5（45只尾蚴）品系的两批曼氏血吸虫尾蚴进行银浸染，确定了嗜银乳头的数量和分布模式，结果如下：背部乳头总数的平均值：12.1（JR品系）和12.0（C5品系）；该表面的变异系数在JR品系中小于4%，且JR品系中的变异系数大于C5品系。腹部乳头总数的平均值：12.15（JR），11.97（C5）；变异系数的最大值：6.4%（JR），JR品系中的变异系数高于C5品系。当将腹部表面分为四个象限进行分析时，每个象限乳头的平均数量为：A象限：1.15（JR）和1.06（C5）；B象限：1.06（JR）和1（C5）；C象限：4.97（JR）和4.96（C5）；D象限：5.03（JR）和4.98（C5）。A和B腹部象限的变异系数较高，后两个象限C和D的变异系数最大值分别达到31.9%和61.0%。当将腹部表面分为三个相等部分以确定该区域变异最大的乳头位置时，获得的变异系数最大值出现在尾蚴的第二个三分之一处：C5品系为89.8%和76.8%，JR品系为43.5%和56.8%。关于外侧乳头总数，平均值分别为：17.0（JR）和16.6（C5），变异系数的最大值为8.1%（C5）。尾的乳头总数平均值：腹部表面为25.6（JR）和26.1（C5），背部乳头为20.72（JR）和21.33（C5）。对两个曼氏血吸虫品系在前腹部象限A或B上有一个以上乳头的尾蚴百分比进行比较（JR为94%，C5为34%），结果存在显著差异（P < 0.05）。
