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The study examined LAB populations specifically due to their potential to help with malt stability and quality <ref>[http://www.researchgate.net/profile/Arja_Laitila/publication/7062169_Lactobacillus_plantarum_and_Pediococcus_pentosaceus_starter_cultures_as_a_tool_for_microflora_management_in_malting_and_for_enhancement_of_malt_processability/links/00b7d529ed5568640a000000.pdf Lactobacillus plantarum and Pediococcus pentosaceus Starter Cultures as a Tool for Microflora Management in Malting and for Enhancement of Malt Processability. ARJA LAITILA, HANNELE SWEINS, ARVI VILPOLA, ERJA KOTAVIITA, JUHANI OLKKU, SILJA HOME, AND AULI HAIKARA. 2006.]</ref>. ''Streptococcus'' was the most abundant genus of bacteria in all samples. In 2010, ''Lactobacillus'' was more abundant than it was in 2011. ''Lactococcus'' and ''Weisella'' were more abundant in 2011 than in 2010. Maltster 1 had a great abundance of both ''Lactococcus'' and ''Weisella'' in 2011 over Maltster 2. In 2010, ''Lactobacillus'' was more abundant for Maltster 2 than it was for Maltster 1. This showed that microbial populations differ not only between harvest years, but also malt houses <ref name="Lievens3"></ref> (~17 mins in).
Another study focused on microbial populations in an American coolship brewery detected only ''Pediococcus'' on grain samples, but the lack of detection of other microbes as was attributed to weak amplification the methods used <ref>[http://elifesciences.org/content/4/e04634 Mapping microbial ecosystems and spoilage-gene flow in breweries highlights patterns of contamination and resistance. Nicholas A Bokulich, Jordyn Bergsveinson, Barry Ziola, David A Mills. March, 2015.]</ref>.
* [https://lirias.kuleuven.be/bitstream/123456789/323419/2/Juste_et_al._FEMS2011_mout%20definitief.pdf See this study] for a list of microbes that were found on malt using DNA methods.