That will depended on the nature of the food but have a look at these documents. http://downloads.hindawi.com/journals/ijfs/2020/2746492.pdf ; Article Microbiological Safety of Street Vended Foods… Microbiologic...

Thanks a lot @Maurice Ekpenyong.

Check ISO 11133 for methods/culture mediums and microorganisms

A good option to get quantified and easy handling reference microorganisms is:

https://www.sigmaaldrich.com/analytical-chromatography/analytical-standards/microbiology-standards.html

I think the best source of microbiological criteria for foodstuffs are in the country's legislature.

For more information, you could also see other counties' legislature.

For quality criteria you could search papers, that refers to specifc food, or food groups.

Thanks a lot Antonios Kalogeris and Diego PERIS Caminero

Perhaps this compilation can be usefu as orientation, it includes not only pathogens but also food indicators. Hope it helps you!

https://www.euskadi.eus/contenidos/informacion/doc_seguridad_alimentaria/es_def/adjuntos/control-alimentos/seguridad-microbiologica/normas-microbiologicas-alimentos-enero-2019.pdf

Diego PERIS Caminero thanks. Is there an English version of the document you sent?

I am afraid not

You can link to the reuropean eferences, but the interesting indicators are in the spanish dedscribed in the spanish regulations...

thanks Diego PERIS Caminero

For both aerobic and coliform/E. coli methods you can prepare a quantified inocule of a known concentration from a lenticule (sigma-aldrich CRM09910H is about 650000ufc)

Thanks Diego PERIS Caminero

https://www.fda.gov/food/laboratory-methods-food/bacteriological-analytical-manual-bam