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杭州湾、钱塘江流域沿岸外环境的肉毒梭菌分布很广。调查22个点检出阳性21个点。外环境各种样品的总检出率为75.95％,上海地区的检出率最低(29.41％),其它地区间的检出率无显著差异。绍兴市区生产的酱豆面制品肉毒梭菌的检出率为20％。检出的所有菌株几乎均为无毒株,其中2株弱毒株其毒力弱到无法定型。生化试验结果显示,被试大多数菌株的生化特性与A、B、F型的PL株相似,但有13株菌株的个别生化反应与试验菌株的总体不同。
Hangzhou Bay, Qiantang River Basin outside the environment of Clostridium botulinum distribution is very wide. Investigation 22 points were positive 21 points. The overall detection rate of various samples in the external environment was 75.95%, the detection rate was the lowest in Shanghai (29.41%), and there was no significant difference among other regions. The detection rate of Clostridium botulinum in soy sauce produced in Shaoxing city is 20%. Almost all strains were detected as non-toxic strains, of which 2 strains of weak virulence can not be set. The results of biochemical tests showed that most of the tested strains had similar biochemical characteristics as PL strains of type A, B, and F, but 13 strains had different biochemical reactions from the tested strains.