微生物限度质量标准的表述

shgmp

usp中的微生物限度质量标准为什么用下面的方式表述，而不直接用数字？CP也跟着学了 很纳闷，是跟微生物统计有关系吗？ 101 = 101 = 10??? 102 = 102 = 100 ??? 103 = 103 = 1000 ??? 最后三句又该怎么解释呢，10个菌落数：最大可接受数目=20？这么翻译怎么也看不明白是什么。 Interpretation of the Results The total aerobic microbial count (TAMC) is considered to be equal to the number of cfu found using Soybean–Casein Digest Agar; if colonies of fungi are detected on this medium, they are counted as part of TAMC. The total combined yeasts and molds count (TYMC) is considered to be equal to the number of cfu found using Sabouraud Dextrose Agar; if colonies of bacteria are detected on this medium, they are counted as part of TYMC. When the TYMC is expected to exceed the acceptance criterion due to the bacterial growth, Sabouraud Dextrose Agar containing antibiotics may be used. If the count is carried out by the MPN Method, the calculated value is TAMC. When an acceptance criterion for microbiological quality is prescribed, it is interpreted as follows: 101 cfu: maximum acceptable count = 20; 102 cfu: maximum acceptable count = 200; 103 cfu: maximum acceptable count = 2000; and so forth. 摘自USP

shgmp

usp中的微生物限度质量标准为什么用下面的方式表述，而不直接用数字？，是跟微生物统计有关系吗？
最后三句又该怎么解释呢，10个菌落数：最大可接受数目=20？这么翻译怎么也看不明白是什么。

Interpretation of the Results

The total aerobic microbial count (TAMC) is considered to be equal to thenumber of cfu found using Soybean–Casein Digest Agar; if colonies of fungi aredetected on this medium, they are counted as part of TAMC. The total combinedyeasts and molds count (TYMC) is considered to be equal to the number of cfufound using Sabouraud Dextrose Agar; if colonies of bacteria are detected onthis medium, they are counted as part of TYMC. When the TYMC is expected toexceed the acceptance criterion due to the bacterial growth, Sabouraud DextroseAgar containing antibiotics may be used. If the count is carried out by the MPNMethod, the calculated value is TAMC.

When an acceptance criterion for microbiological quality is prescribed, it isinterpreted as follows:

·    101【1是上标】 cfu: maximum acceptable count = 20; 【101（1是上标）不应该=10吗？怎么最大接受标准是20了】

·    102【2是上标】 cfu: maximum acceptable count = 200;

·    103【3是上标】 cfu: maximum acceptable count = 2000;

幻影

格式能调一下吗

爱家奔奔

When an acceptance criterion for microbiological quality is prescribed, it is interpreted as follows:
如果规定了微生物质量的接受标准，其具体如下：
•        101 cfu: maximum acceptable count = 20;
101 cfu: 最高接受值 = 20；
•        102 cfu: maximum acceptable count = 200;
102 cfu: 最高接受值 = 200；
•        103 cfu: maximum acceptable count = 2000;
103 cfu: 最高接受值 = 2000；
and so forth.
等等。

爱家奔奔

101代表的是10的一次方，以此类推。表示稀释级别吧。

shgmp

幻影 发表于 2014-2-18 11:57
格式能调一下吗

已经调整了，请看看

幻影

shgmp 发表于 2014-2-18 12:46
已经调整了，请看看

我个人不是很懂，从网上搜了一下，有人这样解释，仅供参考。


这个2倍因子是由于微生物检验的固有可变性导致的，认为计数200 符合102的标准 相应的欧洲标准更加宽泛，部分可以达到5倍因子。所以，如果标准定为200 实际允许观测计数值为400. 举个不恰当的例子，含量标准为100% 但实际允许值为90-110%


继续等大神。

shgmp

幻影 发表于 2014-2-18 13:18
我个人不是很懂，从网上搜了一下，有人这样解释，仅供参考。

最好有文献支持哦

幻影

shgmp 发表于 2014-2-18 20:37
最好有文献支持哦

我也期待有。