Osmophillic microorganisms Are those organisms tha grow in concentrated food products Osmophillic microorganisms most commonly encountered in food industry are yeasts They can grow in highly concentrated sugar solutions They are frequently the cause of honeny, chocolate, candy,jams etc. Almost all of the the known osmophillic yeasts are species of saccharomyces species.
Pectinolytic microorganism Are those microorganisms capable of degrading pectins foun in fruites and vegetables.the destruction of the pectin can cause subsequent loss of jelly power of fruites and softening of the stored fruits and vegetables. The pectinolytic organisms includes species of Achrobacterium, Aeromonas ,Arthrobacter, Bacillus , Enterobacer etc. It also includes many yeasts and moulds
Acid producing microorganisms An important group of acid producing bacteria in the food industry is
the lactic acid bacteria
Leuconostoc, Pediococcus and Lactobacillus. The homofermentative species produce lactic acid from the available sugar, while the hetrofermentative types produce inadition to lactic acid, mainly acic acid, ethanol and CO2. Many sporeforming species belonging to the genera Bacillus and Clostridium are also important acid producers