When in -house prepared microbiological media are properly prepared andsterilized using a validated method, the growth-promotion testing maybe limited to each incoming lot of dehydrated media ,unless otherwiseinstructed by the relevant compendial method .If the media preparationwas not validated , then every batch of media would be subjectedto groth-promotion testing .
在本段的前半句中提到 properly prepared and sterilized using a validated method，只要是合适的并且灭菌过程中经过验证的配制，促生长试验可放宽至一个干粉培养基的批号。
后半句则说media preparation was not validated ，培养基的配制未经过验证，则每个配制批次的培养基需做促生长试验！
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