Bacteria in concentrated coffee brews were studied. Bacillaceae and Microco
ccaceae were the typical flora of the concentrated coffee beverage. Bacteri
a did not grow in concentrated coffee at the different temperatures studied
. Changes in pH values resulted the most important event in affecting the s
helf-life of the product. It is likely that the presence of a great amount
of Maillard Reaction Products (MRPs) does not allow bacteria growth.