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本文对痢疾杆菌不同群、型间的交叉保护作用进行了观察。试验模型为恒河猴，将其分为４组，第一、三组分别为感染过福氏１ａ和宋内菌并已康复的猴；第四组为用双价菌苗株ＦＳ（福氏２ａ和宋内）免疫的猴体，剂量依次为４×１０１０、６．５×１０１０、６×１０１０，共１６．５×１０１０活菌，第二组为空白对照。所有４组皆用福氏２ａ２５８００×１０８活菌攻击。从发病率来看，不同菌群与菌型间没有明显的交叉保护作用；从发病程度看则一组显著低于对照组，三组与对照组无显著差异，此结果表明痢疾杆菌Ｂ群内存在交叉保护作用，但较同型保护作用弱。
In this paper, different groups of Shigella and cross-type protection were observed. The experimental model was rhesus monkeys, which were divided into 4 groups. The first and third groups were monkeys who had been infected with the bacteria of the genus Ia and Song respectively and recovered. The fourth group consisted of the bivalent bacterial strain FS 2a and Song) immunized monkeys, the order of 4 × 1010,6.5 × 1010,6 × 1010, a total of 16.5 × 1010 live bacteria, the second group of blank control. All 4 groups were challenged with Freesia 2a25800 × 108 live bacteria. From the incidence point of view, there is no significant cross-protection between different flora and bacteria; from the incidence of one group was significantly lower than the control group, the three groups and the control group no significant difference between the results show that dysentery bacillus group B memory The role of cross protection, but the same type of protection is weak.