The Latest Biology News And Medical NewsBiology News 2Health News 2Biology News 3Health News 3
HOME >> BIOLOGY >> NEWS
Study urges caution in contaminant source tracking

he country.

"All too often, results of these analyses are offered without enough validation of accuracy," Stoeckel explained. "Source tracking study results should always be supported by quality control data. Interpretation of the results can be supported by multiple lines of evidence, such as land use data and presence of wastewater chemicals such as caffeine, when pointing to sources of contamination. Both the client and the analyzing laboratory have a part in making sure interpretations are accurate."

Prior source tracking research reports cite accuracy ranges from 6090 percent for various source tracking methods. The authors of the USGS study attribute the discrepancy between the 6090 accuracy rates and the 2030 accuracy rates they reported to a number of other factors:

  • Different bacteria may be present in animal guts in different seasons; in the USGS study, challenge isolates were collected 9 months after the reference feces were collected;

  • There may be too many strains of E. coli bacteria in each animal species for effective application with small reference libraries, such as the 900 reference strains in the USGS study. At a cost of $10 to $100 to analyze one reference strain, however, building large source libraries gets expensive rather quickly.

  • E. coli strains may not be truly specific to one animal source. Some E. coli strains have been found in more than one animal source, such as when animals live in close proximity with one another, though no evidence to support this premise was found in the USGS study.

    Further research may lead to improvements in current source tracking methods or development of better methods. For the immediate future, researchers and end users would be prudent to use caution and to incorporate quality-control measures to validate the accuracy of source tracking results.


    '"/>




    • 6-Dec-2004


    Page: 1 2

    Related biology news :

    1. Study begins to reveal clues to the cause and progression of sepsis
    2. Study finds gender differences in renal and other genes contributing to blood pressure
    3. Study suggests estrogen deficiency can lead to obesity-induced high blood pressure after menopause
    4. Study: Sticking to the sand might not be such good, clean fun for beachgoers
    5. Study points to new way to predict death risk from torn aorta
    6. Study identifies new gene therapy tools for inherited blindness
    7. Study finds contaminated water reaching Floridas offshore keys
    8. Study sheds light on why humans walk on two legs
    9. Study explains how pathogens evolve to escape detection
    10. Study finds hereditary link to premenstrual depression
    11. Study identifies energy efficiency as reason for evolution of upright walking

    Post Your Comments:
    *Name:
    *Comment:
    *Email:
    		TAG: Study urges caution contaminant source tracking

    (Date:11/23/2009)..., , , , , , , ,...rew Marshall, from the Environment Department at t... Kinyongia magomberae and his wider work in Tanza...rmation. , , , , , , ... , , , , A new species of chameleon has...
    (Date:11/23/2009)...itute for Child Health Research has found evidence... in pregnancy affects child behaviour in different...e in the international journal Addiction . , Le...awn from a random sample of more than 2000 mothers...the baby,s delivery, and were then followed up whe...
    (Date:11/23/2009)... , A bit of imagination on the part of a meas... help to add data from areas where the instrument ...ructively. In order to infer missing data in an as...tion, physicists at the Max Planck Institute for A...rception called information field theory. The scie...
    Breaking Biology News(10 mins):New chameleon species discovered in East Africa 2New chameleon species discovered in East Africa 3New study links alcohol in pregnancy to child behavior problems 2Visual assistance for cosmic blind spots 2Visual assistance for cosmic blind spots 3Visual assistance for cosmic blind spots 4CenterWatch Honored a Fifth Consecutive Year for Best Healthcare Content 14779 1CenterWatch Honored a Fifth Consecutive Year for Best Healthcare Content 14779 2Reportlinker Adds Infections Throat Infection 61072 1Reportlinker Adds Infections Throat Infection 61072 2Reportlinker Adds Infections Throat Infection 61072 3Reportlinker Adds US World Nutraceutical Ingredients Industry 61069 1Reportlinker Adds US World Nutraceutical Ingredients Industry 61069 2Reportlinker Adds US World Nutraceutical Ingredients Industry 61069 3Reportlinker Adds US World Nutraceutical Ingredients Industry 61069 4Reportlinker Adds US World Nutraceutical Ingredients Industry 61069 5Reportlinker Adds US World Nutraceutical Ingredients Industry 61069 6Reportlinker Adds US World Nutraceutical Ingredients Industry 61069 7Reportlinker Adds US World Nutraceutical Ingredients Industry 61069 8Reportlinker Adds US World Nutraceutical Ingredients Industry 61069 9Reportlinker Adds US World Nutraceutical Ingredients Industry 61069 10Reportlinker Adds US World Nutraceutical Ingredients Industry 61069 11Reportlinker Adds US World Nutraceutical Ingredients Industry 61069 12Reportlinker Adds US World Nutraceutical Ingredients Industry 61069 13
    (Date:11/20/2009)...0 Karolinska Development AB today,...has entered into a,co-investment agreement with th...by Karolinska Development and used to invest in th...l and medical technology companies. EIF,has agreed... The agreement,represents EIF,s largest single inv...
    (Date:11/20/2009)... recently announced that a free webinar, “Ro...e Particle Characterization”, will be presen...lication of in situ particle characterization is d... series of roller compaction runs while varying ra...ces. , (PRWEB) November 2...
    (Date:11/19/2009)... charge their cell phones and other personal elect...ry made by UC San Diego engineers could lead to ca...just this. , In recent research, published in ...fessor in the UCSD Department of Mechanical and Ae...ark Hoefer, have found that artificially introduce...
    (Date:11/19/2009)...FirstCall/ -- Omeros Corporation (Nasdaq: OMER ) ...e third quarter ended September 30, 2009. For the ...rted a net loss of $3.9 million, or $1.34 per shar...2.54 per share, for the same period in 2008. For t...ny reported a net loss of $15.5 million, or $5.29 ...
    Breaking Biology Technology:Karolinska Development and EIF Start Landmark Co-Investment Fund for Life Science Innovation 2Karolinska Development and EIF Start Landmark Co-Investment Fund for Life Science Innovation 3Roller Compaction Process Optimization Using At-Line Particle Characterization 2Nanotube defects equal better energy and storage systems 2Omeros Corporation Reports Third Quarter 2009 Financial Results and Development Highlights 2Omeros Corporation Reports Third Quarter 2009 Financial Results and Development Highlights 3Omeros Corporation Reports Third Quarter 2009 Financial Results and Development Highlights 4Omeros Corporation Reports Third Quarter 2009 Financial Results and Development Highlights 5Omeros Corporation Reports Third Quarter 2009 Financial Results and Development Highlights 6Omeros Corporation Reports Third Quarter 2009 Financial Results and Development Highlights 7Omeros Corporation Reports Third Quarter 2009 Financial Results and Development Highlights 8
    Other News:
    Plants and animals living together in communities don't rub shoulders too closely because evolution has caused them to compromise on key life measures, say ecologists at Imperial College London and Ro
    ...leburg, Va., Oct. 1, 2004 -- Sale of Virginia Tech...Research and Extension Center, Sunday, Oct. 10, wi...re some of the finest horses in the state and supp...ry. The sale of yearlings begins with inspections ...
    ...iversity of Utah study showing how lice evolved wi...inct species of early human came into direct conta...ead the parasites to our ancestors.... ... Th...istinct types of head lice. One type is found worl...
    ... result of fossil fuel emissions, many freshwater ...ied. When combusted, fossil fuels release sulfur d...precipitation, into the atmosphere. Persistent exp...n rain, snow, sleet, hail and fog, can compromise ...
    Don't stand so close to me: A new view on how species coexist 2Yearling horse auction to benefit equine research 2Of lice and men 2Of lice and men 3Of lice and men 4Of lice and men 5A treatment, not a cure: Calcium silicate neutralizes an acidic stream 2A treatment, not a cure: Calcium silicate neutralizes an acidic stream 3
    ...ical isolated from a weed that grows in mountain m...s of an aggressive brain cancer that affects some ...aling pathway that appears to be important for the... which there is no effective treatment.......In an...
    ... Aug. 29, 2002 Every morning millions of America... them start their day......."That drug is caffeine...chiatry at UT Southwestern Medical Center at Dalla...aining how caffeine exerts its stimulatory effect ...
    ...E/WASHINGTON, DC/JOHANNESBURG, SOUTH AFRICA; Augus...) and Conservation International (CI) have been se...CC) and the United Nations Environment Program (UN...ss Awards for Sustainable Development Partnerships...
    ... Ghana August 30, 2002 In an unprecedented effor...m destructive commercial hunting practices, a two-...of wild game or bushmeat and providing viable al...n 200 participants including government officials...
    Plant compound kills brain tumor cells 2Plant compound kills brain tumor cells 3Plant compound kills brain tumor cells 4UT Southwestern scientist explores caffeine-signaling activity in brain function 2Starbucks-Conservation Intl. partnership awarded at World Summit 2Starbucks-Conservation Intl. partnership awarded at World Summit 3Ghana takes aim at bushmeat hunting 2Ghana takes aim at bushmeat hunting 3Ghana takes aim at bushmeat hunting 4