Barend van Zadelhoff Apr 16, 2013:

The sentence is unclearly worded
'microbiologisch belastingsonderzoek' is awkward Dutch
'onderzoek naar/van de microbiologische belasting' would be more appropriate

This would be more intelligible:

Vervolgens wordt er zoals beschreven onderzoek gedaan naar de microbiologische belasting van het product met de betreffende pathogenen.

of

De microbiologische belasting van het product met de betreffende pathogenen zal vervolgens worden onderzocht zoals beschreven

If you wanted to use Michael's suggestion you would need to come up with something like (perhaps Michael can come up with a better construction):

Subsequently a microbial load test will be performed on the product with respect to the relevant pathogens as described

Another option is perhaps:

Subsequently the microbial load of the product with respect to the relevant pathogens will be determined as described