Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Cranberry may offer protection against antibiotic-resistant bacteria that cause UTIs

19.06.2002


Fewer Infections may mean less antibiotic therapy



Public health officials concerned about the rising problem of antibiotic resistance ¾ the immunity that bacteria develop to common prescriptions ¾ may have an ally in a common household beverage. Findings published in a research letter to the editor in the June 19, 2002 issue of The Journal of the American Medical Association (JAMA) indicate scientists have discovered that regular consumption of cranberry juice cocktail may offer protection against certain antibiotic resistant bacteria that cause urinary tract infections (UTIs).

This latest research, conducted jointly between Rutgers, The State University of New Jersey and the University of Michigan, suggests that regular consumption of cranberry juice cocktail could reduce the potential for development of UTIs, thus decreasing the need for antibiotics. In this study, scientists tested the effectiveness of cranberry juice cocktail in disabling a number of Escherichia coli (E. coli) bacteria, some of which are resistant to certain drugs. Preventing UTIs could potentially reduce the use of antibiotics, and subsequently reduce further development of antibiotic resistance.


"We found that when subjects consumed cranberry juice cocktail, their urine was capable of preventing not only susceptible, but antibiotic-resistant bacteria from attaching to the urinary tract," said Amy B. Howell, Ph.D., research scientist at Rutgers, and lead investigator of the study. "Cranberry acts to promote flushing of these problematic bacteria from the bladder into the urine stream, which should result in a lower rate of infection."

According to Betsy Foxman, Ph.D., Professor of Epidemiology and Director at the Center for Molecular and Clinical Epidemiology at the University of Michigan School of Public Health, who co-authored this study, "In light of the increasing antibiotic resistance of many bacteria, the public health significance of the role of foods, such as cranberry juice cocktail, in preventing infections warrants further consideration. A lower number of infections means reduced use of antibiotics and lower potential risk of developing further bacterial antibiotic resistance." She continued, "Additional work that I co-authored, cited in the October 4, 2001 edition of The New England Journal of Medicine, suggests that an increasing number of new E. coli strains are resistant to the most common antibiotics used to treat UTIs, prompting physicians and researchers to look for alternatives."

The JAMA findings indicate that cranberry’s well-documented anti-adhesion mechanism is effective against both the antibiotic-resistant and sensitive E. coli strains tested. Specifically, the researchers examined various E. coli isolates from the urine of women and men with UTIs. These isolates were introduced into urine samples collected from healthy subjects before and after drinking eight ounces of cranberry juice cocktail. The samples taken after the cranberry juice cocktail was consumed prevented 79 percent of antibiotic resistant bacteria from sticking to the urinary tract cells, while urine samples taken before cranberry juice cocktail was consumed failed to prevent adhesion. In total, the cranberry juice cocktail prevented 80 percent of all bacteria tested from sticking.

This study is also the first to look at duration of effect of cranberry in the urinary tract. Said Dr. Howell, "This research found that cranberry juice cocktail’s beneficial effect may start within two hours and can last for up to 10 hours in the urine, which suggests that consuming a serving in the morning and one in the evening may provide more effective anti-adhesion protection than consuming one serving a day."

A common misconception is that cranberries help maintain urinary tract health by acidifying the urine, but research supports that the anti-adhesion, or anti-stick, property of the cranberry is the key to its urinary tract health benefit. Scientists believe that the proanthocyanidins, or condensed tannins, in cranberries prevent certain E. coli bacteria from sticking to the urinary tract and causing infection.

The National Center of Complementary and Alternative Medicine, a branch of the National Institutes of Health, recently approved funding to support further research on the role of cranberry, with one area of emphasis being the effect of cranberry in prevention of UTI, and as an adjunct to antibiotics in the treatment of UTI. Funding for antimicrobial resistance research has increased more than 75 percent, from $7.8 million in 1992 to approximately $13.8 million in 1998, indicating that national concern over resistant bacteria has increased dramatically.

Cranberry juice cocktail is a food, not a drug, nor should it be used in place of a drug. Anyone who suspects an infection should always consult a physician. Cranberry juice cocktail should not be used as a treatment for infection, but may be an effective part of a prevention routine.


This study was funded by Ocean Spray Cranberries, Inc.


Michele Hujber | EurekAlert!

More articles from Health and Medicine:

nachricht New malaria analysis method reveals disease severity in minutes
14.08.2017 | University of British Columbia

nachricht New type of blood cells work as indicators of autoimmunity
14.08.2017 | Instituto de Medicina Molecular

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Exotic quantum states made from light: Physicists create optical “wells” for a super-photon

Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.

Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...

Im Focus: Circular RNA linked to brain function

For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.

While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...

Im Focus: RAVAN CubeSat measures Earth's outgoing energy

An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.

The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...

Im Focus: Scientists shine new light on the “other high temperature superconductor”

A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.

Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...

Im Focus: Scientists improve forecast of increasing hazard on Ecuadorian volcano

Researchers from the University of Miami (UM) Rosenstiel School of Marine and Atmospheric Science, the Italian Space Agency (ASI), and the Instituto Geofisico--Escuela Politecnica Nacional (IGEPN) of Ecuador, showed an increasing volcanic danger on Cotopaxi in Ecuador using a powerful technique known as Interferometric Synthetic Aperture Radar (InSAR).

The Andes region in which Cotopaxi volcano is located is known to contain some of the world's most serious volcanic hazard. A mid- to large-size eruption has...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Call for Papers – ICNFT 2018, 5th International Conference on New Forming Technology

16.08.2017 | Event News

Sustainability is the business model of tomorrow

04.08.2017 | Event News

Clash of Realities 2017: Registration now open. International Conference at TH Köln

26.07.2017 | Event News

 
Latest News

New thruster design increases efficiency for future spaceflight

16.08.2017 | Physics and Astronomy

Transporting spin: A graphene and boron nitride heterostructure creates large spin signals

16.08.2017 | Materials Sciences

A new method for the 3-D printing of living tissues

16.08.2017 | Interdisciplinary Research

VideoLinks
B2B-VideoLinks
More VideoLinks >>>