The invention relates to new isolated Lactobacillus strains chosen from Lactobacillus mellifer Bin4N.sup.T (LMG P-28344) and Lactobacillus apinorum Fhon13N.sup.T (LMG P-28345), which have been isolated from honeybees or their processed food. The bacterial strains have unique properties such as production of benzene, free fatty acids and 2-heptanone, rendering them useful in many areas such as in food and beverage products, feed products and medical products.