Lactobacillus acidophilus 965861 222418450 2008-06-29T06:46:04Z Thijs!bot 1392310 robot Adding: [[uk:Lactobacillus acidophilus]] {{Taxobox | name = ''Lactobacillus acidophilus'' | image = Lactobacillus_sp_01.png | image_width = 240px | image_caption = ''L. acidophilus'' bacteria near [[Vagina|vaginal]] [[squamous]] [[Epithelium|epithelial]] cells) | regnum = [[Bacteria]] | divisio = [[Firmicutes]] | classis = [[Bacilli]] | ordo = [[Lactobacillales]] | familia = [[Lactobacillaceae]] | genus = ''[[Lactobacillus]]'' | species = '''''L. acidophilus''''' | binomial = ''Lactobacillus acidophilus'' | binomial_authority = (Moro 1900)<br />Hansen &amp; Mocquot 1970 }} '''''Lactobacillus acidophilus''''' is one [[species]] in the genus ''[[Lactobacillus]]''. It is sometimes used commercially together with ''[[Streptococcus salivarius]]'' and ''[[Lactobacillus bulgaricus|Lactobacillus delbrueckii ssp. bulgaricus]]'' in the production of acidophilus-type [[yogurt]]. ''Lactobacillus acidophilus'' gets its name from ''lacto-'' meaning milk, ''-bacillus'' meaning rod-like in shape, and ''acidophilus'' meaning acid-loving. This bacterium thrives in more acidic environments than most related microorganisms (pH 4-5 or lower) and grows best at 30 degrees Celsius. ''L. acidophilus'' occurs naturally in the human and animal [[gastrointestinal tract]], [[mouth]], and [[vagina]].<ref> {{cite web | title = Bacteria Genomes - LACTOBACILLUS ACIDOPHILUS | publisher = [[European Bioinformatics Institute]] | url = http://www.ebi.ac.uk/2can/genomes/bacteria/Lactobacillus_acidophilus.html | accessdate = 2007-08-22 }}</ref> ''L. acidophilus'' ferments [[lactose]] into [[lactic acid]], like many (but not all) [[lactic acid bacteria]]. Certain related species (known as heterofermentive) also produce [[ethanol]], [[carbon dioxide]], and [[acetic acid]] this way. ''L. acidophilus'' itself (a homofermentative microorganism) produces only lactic acid. Like many bacteria, ''L. acidophilus'' can be killed by excess heat, moisture, or direct sunlight. Some strains of ''L. acidophilus'' may be considered a [[probiotic]] or "friendly" bacteria.<ref name=Ljungh_2006>{{cite journal |author=Ljungh A, Wadström T |title=Lactic acid bacteria as probiotics |journal=Curr Issues Intest Microbiol |volume=7 |issue=2 |pages=73–89 |year=2006 |pmid=16875422}}</ref> These types of healthy bacteria inhabit the intestines and vagina and protect against some unhealthy organisms. The breakdown of nutrients by ''L. acidophilus'' produces lactic acid, [[hydrogen peroxide]], and other byproducts that make the environment hostile for undesired organisms. ''L. acidophilus'' also tends to consume the nutrients many other microorganisms depend on, thus outcompeting possibly harmful bacteria in the digestive tract. During digestion, ''L. acidophilus'' also assists in the production of [[niacin]], [[folic acid]], and [[Vitamin B6|pyridoxine]]. ''L. acidophilus'' can assist in [[bile]] deconjugation, separating [[amino acid]]s from bile acids, which can then be recycled by the body.<ref name=Gilliland_1977>{{cite journal |author=Gilliland S, Speck M |title=Deconjugation of bile acids by intestinal lactobacilli |journal=Appl Environ Microbiol |volume=33 |issue=1 |pages=15–8 |year=1977 |url=http://www.pubmedcentral.nih.gov/picrender.fcgi?artid=170567&blobtype=pdf |pmid=13710}}</ref> Some research has indicated ''L. acidophilus'' may provide additional health benefits, including improved [[Gastrointestinal tract|gastrointestinal]] function, a boosted [[immune system]], and a decrease in the frequency of vaginal [[Candidiasis|yeast infections]]. Some people report ''L. acidophilus'' provides relief from [[indigestion]] and [[diarrhea]].<ref name=de_Roos_2000>{{cite journal |author=de Roos N, Katan M |title=Effects of probiotic bacteria on diarrhea, lipid metabolism, and carcinogenesis: a review of papers published between 1988 and 1998 |journal=Am J Clin Nutr |volume=71 |issue=2 |pages=405–11 |year=2000 |url=http://www.ajcn.org/cgi/content/abstract/71/2/405 |pmid=10648252}}</ref> A [[University of Nebraska]] [http://ard.unl.edu/rn/0902/ecoli.html study] found that feed supplemented with ''L. acidophilus'' and fed to cattle resulted in a 61% reduction of ''[[Escherichia coli]] [[Escherichia coli O157:H7|0157:H7]]''. Research has indicated ''L. acidophilus'' may be helpful reducing serum [[cholesterol]] levels.<ref name=Anderson_1999>{{cite journal |author=Anderson J, Gilliland S |title=Effect of fermented milk (yogurt) containing Lactobacillus acidophilus L1 on serum cholesterol in hypercholesterolemic humans |journal=J Am Coll Nutr |volume=18 |issue=1 |pages=43–50 |year=1999 |url=http://www.jacn.org/cgi/reprint/18/1/43.pdf |pmid=10067658}}</ref> ''L. acidophilus'' is part of the normal vaginal [[flora (microbiology)|flora]].<ref name=Forsum_2005>{{cite journal |author=Forsum U, Holst E, Larsson P, Vasquez A, Jakobsson T, Mattsby-Baltzer I |title=Bacterial vaginosis--a microbiological and immunological enigma |journal=APMIS |volume=113 |issue=2 |pages=81–90 |year=2005 |pmid=15723682 |doi=10.1111/j.1600-0463.2005.apm1130201.x}}</ref> The acid produced by ''L. acidophilus'' in the vagina helps to control the growth of the fungus ''[[Candida albicans]]'', helping to prevent vaginal yeast infections. The same beneficial effect has been observed in cases of oral or gastrointestinal [[Candidiasis]] infections. Certain spermicides and contraceptive creams can kill ''L. acidophilus'' in the vagina, clearing the path to possible yeast infections. [[Antibiotic]]s taken orally will also kill beneficial bacteria such as ''L. acidophilus''. After a course of antibiotic therapy, patients are occasionally instructed to take an ''L. acidophilus'' treatment in order to recolonize the gastrointestinal tract. ''L. acidophilus'' is often sold in health stores in pill or powder form as a nutritional supplement. Research on the nutritional benefits of taking ''L. acidophilus'' supplements is inconsistent and inconclusive. Most such claims boil down to a link between ''L. acidophilus'' and a possible decrease in the incidence of certain diseases, including yeast infections, gastrointestinal disorders, and a weakened immune system. Most researchers agree further study is needed before substantiating many of these claims. == References == <!-- --------------------------------------------------------------- See http://en.wikipedia.org/wiki/Wikipedia:Footnotes for a discussion of different citation methods and how to generate -------------------------------------------------------------------- --> {{Reflist|2}} == External links == * [http://www.nlm.nih.gov/medlineplus/druginfo/natural/patient-acidophilus.html Article on health benefits of Lactobacillus acidophilus at MedlinePlus] * [http://www.umm.edu/altmed/ConsSupplements/Lactobacillusacidophiluscs.html Article on Lactobacillus Acidophilus at University of Maryland Medical Center website] * [http://www.swedish.org/110783.cfm Acidophilus and Other Probiotics] * [http://www.bact.wisc.edu/scienceed/lactobacillusacidophilus.html Lactobacillus acidophilus] from the U. of Wisconsin * [http://www.calpoly.edu/~rcano/Lacto_genome.html Lactobacillus Genome Project] * [http://www.pnas.org/cgi/content/abstract/103/10/3816 Global analysis of carbohydrate utilization by Lactobacillus acidophilus using cDNA microarrays] * [http://bioline.utsc.utoronto.ca/archive/00000664/02/jb03089.pdf Safety and protective effect of Lactobacillus acidophilus and Lactobacillus casei used as probiotic agent in vivo] * [http://www.wjgnet.com/1007-9327/12/853.pdf Probiotics and the gastrointestinal tract: Where are we in 2005?] * [http://www.innovatewithdairy.com/NR/rdonlyres/DEE5BE18-D2CE-479A-AC32-B7BB70EC4811/0/Probiotics_083105.pdf Opportunities for Probiotic Dairy Products] * [http://www.pharmacologyonline.unisa.it/archivies/2005/6_Cho.pdf Probiotics and Gastrointestinal Disorders] * [http://www.ajcn.org/cgi/content/full/81/4/939 Can the amount of Helicobacter pylori in the stomach be kept low through probiotic intake?] * [http://medind.nic.in/jac/t05/i1/jact05i1p67.pdf Probiotics in Health and Disease] * [http://mjnrc.com/vol04no03art5.pdf The role of Bifidobacterium bifidum and Lactobacillus acidophilus as probiotics in controlling infantile watery diarrhea] * [http://www.jfponline.com/pdf%2F5407%2F5407JFP_AppliedEvidence3.pdf Do probiotics reduce adult lactose intolerance? A systematic review] * [http://www.uaslabs.com/sections/DDS-1Review.pdf Review of Scientific Evidence for Efficacy of Lactobacillus acidophilus DDS-1 as a Probiotic strain] * [http://www.dairyforall.com/acidophilusmilk.php Acidophilus milk and its method of production] {{Dietary supplement}} [[Category:Bacteriology]] [[Category:Digestive system]] [[Category:Probiotics]] [[Category:Lactobacillaceae]] [[Category:Microbiology]] [[da:Lactobacillus acidophilus]] [[de:Lactobacillus acidophilus]] [[es:Lactobacillus acidophilus]] [[fr:Lactobacillus acidophilus]] [[it:Lactobacillus acidophilus]] [[he:Lactobacillus acidophilus]] [[hu:Lactobacillus acidophilus]] [[nl:Lactobacillus acidophilus]] [[pl:Lactobacillus acidophilus]] [[uk:Lactobacillus acidophilus]]