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对从中国２０个省（区）采集的１５４２个土壤样品中分离的４１０株苏云金芽孢杆菌进行了血清学鉴定。结果表明，２１８株（５３．２％）属于已知３０个标准Ｈ－血清型中的１５个Ｈ－血清型，即Ｈ１、Ｈ２、Ｈ３、Ｈ４、Ｈ５、Ｈ６、Ｈ７、Ｈ８、Ｈ１３、Ｈ１４、Ｈ１５、Ｈ１６、Ｈ１７、Ｈ２２和Ｈ２６。其余的１９２株中，除１７５株为无鞭毛或自凝菌株无法进行血清学鉴定外，１６株（３．９％）的Ｈ－抗原不与已知２７个标准Ｈ－抗血清起交叉反应，其中有４株的Ｈ－抗血清也不与已知２７个标准菌株的Ｈ－抗原起交叉反应；另一菌株无Ｈ－抗原，但其伴孢晶体和芽孢不分离，并连成长链状。这５个菌株生化反应也与Ｈ－血清型１－２７的标准菌株不同。还对各省（区）不同Ｈ－血清型在不同植被的土壤中的分布进行了分析。４１０株分离菌中，有２７８株对小菜蛾幼虫有毒力，１０株有高毒力；１０７株对致乏库蚊幼虫有毒力，６株有高毒力。１１株无反应菌和１株属Ｈ２型及１株属Ｈ２２型的分离菌对致乏库蚊、中华按蚊及家蚕幼虫不显示毒力。
A total of 410 Bacillus thuringiensis isolates from 1542 soil samples collected from 20 provinces (districts) of China were identified. The results showed that 218 (53.2%) belonged to 15 H-serotypes of known 30 standard H-serotypes, namely H1, H2, H3, H4, H5, H6, H7, H8, H13, H14 , H15, H16, H17, H22 and H26. Of the remaining 192 isolates, 16 (3.9%) of the H-antigens did not cross-react with the known 27 standard H-antisera, except 175 were non-flagella or self-condensing strains were not serologically identified, Four strains of H-antiserum also did not cross-react with H-antigen of 27 known strains. The other strain did not have H-antigen, but the crystal of sporulation did not separate from sporulation and became longer chain. The biochemical reactions of these five strains are also different from the standard strains of H-serotypes 1-27. The distribution of different H-serotypes in different vegetations of soils was also analyzed. Of the 410 isolates, 278 were virulent to Plutella xylostella larvae and 10 were highly virulent; 107 were virulent to Culex pipiens larvae and 6 were highly virulent. Eleven non-reactive bacteria and one isolate belonging to genus H2 and one genus H22 showed no toxicity to Culex pipiens pallens, Anopheles sinensis and silkworm larvae.