Source http://www.denniskunkel.com/DK/Bacteria/24704B.html
Bifidobacterium sp. - Gram-positive, anaerobic, rod prokaryote. Bifidobacterium spp. are a large group of probiotic 
bacteria that are present in the mammalian gastrointestinal tract, mouth and vagina. They are responsible for 
suppressing pathogenic microorganisms and are rarely pathogenic. Infections due to some species of 
Bifidobacterium include obstetric and gynecological sepsis, peritonitis, pulmonary infections, urinary 
tract infections, bacteremia and endocarditis. Bifidobacterium spp. are used as a form of probiotic that is 
thought to have health promoting properties for humans. Probiotic bacteria favorably alter the intestine microflora 
balance, inhibit the growth of harmful bacteria, promote good digestion, boost immune function, and increase 
resistance to infection.