国家标准测定食品细菌总数培养基的改进研究

应用我国国家标准营养琼脂（GB4789 2－94简称NA）与美国食品药品管理局（FDA）标准平析以（简称SA）两种培养基对动植物食品中细菌总数进行检测对比，结果表明FDA标准平板比GＢ营养琼脂效果较好，前比后的检出率高出２３．９％，且菌落大而明显，为此，对这两种培养基进行优化筛选试验，并优选出Ｃ８培养基，扩大试验结果表明C8培养基的检出率较GB营养琼脂及FDA标准平板分别高出35．8％和9．5％。

AN IMPROVED TECHNIQUE ON NUTIONAL GB NUTRIENT AGAR FOR COUNTING BACTERIA RIENT AGAR FOR COUNTING BACTERIA

Both Chinese GB nutrient agar and American FDA standard method agar are commonly used for counting bacteria in food inspection. A number of our experiments showed that the count of bacteria by FDA standard method agar is 23. 9% higher than that by GB nutrient agar. The present C8 medium is an improved medium based on the composition of the two media mentioned above The result of our comparison experiment showed that the C8 medium used for counting bacteria was 35. 8% higher than that by GB nutrient agar and 9. 5% higher than that by FDA standard method agar respectively.