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  1. Article ; Online: Assessing cross-laboratory performance for quantifying coliphage using EPA Method 1642.

    Zimmer-Faust, Amity G / Griffith, John F / Steele, Joshua A / Asato, Laralyn / Chiem, Tania / Choi, Samuel / Diaz, Arturo / Guzman, Joe / Padilla, Michele / Quach-Cu, Jennipher / Ruiz, Victor / Santos, Bryan / Woo, Mary / Weisberg, Stephen B

    Journal of applied microbiology

    2022  Volume 133, Issue 2, Page(s) 340–348

    Abstract: Aims: Widespread adoption of the new U.S. Environmental Protection Agency (USEPA) Method 1642 for enumeration of coliphage in recreational water requires demonstration that laboratories consistently meet internal method performance goals and yield ... ...

    Abstract Aims: Widespread adoption of the new U.S. Environmental Protection Agency (USEPA) Method 1642 for enumeration of coliphage in recreational water requires demonstration that laboratories consistently meet internal method performance goals and yield results that are consistent across laboratories.
    Methods and results: Here we assess the performance of six laboratories processing a series of blind wastewater- and coliphage-spiked samples along with laboratory blanks. All laboratories met the method-defined recovery requirements when performance was averaged across samples, with the few failures on individual samples mostly occurring for less-experienced laboratories on the initial samples processed. Failures that occurred on later samples were generally attributed to easily correctable activities. Failure rates were higher for somatic vs. F+ coliphage, attributable to the more stringent performance criteria associated with somatic coliphage. There was no difference in failure rate between samples prepared in a marine water matrix compared to that in phosphate-buffered saline.
    Conclusions: Variation among laboratories was similar to that previously reported for enterococci, the current bacterial indicator used for evaluating beach water quality for public health protection.
    Significance and impact of the study: These findings suggest that laboratory performance is not an inhibitor to the adoption of coliphage as a new indicator for assessing recreational health risk.
    MeSH term(s) Coliphages ; Enterococcus ; Feces/microbiology ; Laboratories ; Water Microbiology ; Water Quality
    Language English
    Publishing date 2022-04-13
    Publishing country England
    Document type Journal Article
    ZDB-ID 1358023-1
    ISSN 1365-2672 ; 1364-5072
    ISSN (online) 1365-2672
    ISSN 1364-5072
    DOI 10.1111/jam.15523
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Assessing cross‐laboratory performance for quantifying coliphage using EPA Method 1642

    Zimmer‐Faust, Amity G. / Griffith, John F. / Steele, Joshua A. / Asato, Laralyn / Chiem, Tania / Choi, Samuel / Diaz, Arturo / Guzman, Joe / Padilla, Michele / Quach‐Cu, Jennipher / Ruiz, Victor / Santos, Bryan / Woo, Mary / Weisberg, Stephen B.

    Journal of applied microbiology. 2022 Aug., v. 133, no. 2

    2022  

    Abstract: AIMS: Widespread adoption of the new U.S. Environmental Protection Agency (USEPA) Method 1642 for enumeration of coliphage in recreational water requires demonstration that laboratories consistently meet internal method performance goals and yield ... ...

    Abstract AIMS: Widespread adoption of the new U.S. Environmental Protection Agency (USEPA) Method 1642 for enumeration of coliphage in recreational water requires demonstration that laboratories consistently meet internal method performance goals and yield results that are consistent across laboratories. METHODS AND RESULTS: Here we assess the performance of six laboratories processing a series of blind wastewater‐ and coliphage‐spiked samples along with laboratory blanks. All laboratories met the method‐defined recovery requirements when performance was averaged across samples, with the few failures on individual samples mostly occurring for less‐experienced laboratories on the initial samples processed. Failures that occurred on later samples were generally attributed to easily correctable activities. Failure rates were higher for somatic vs. F+ coliphage, attributable to the more stringent performance criteria associated with somatic coliphage. There was no difference in failure rate between samples prepared in a marine water matrix compared to that in phosphate‐buffered saline. CONCLUSIONS: Variation among laboratories was similar to that previously reported for enterococci, the current bacterial indicator used for evaluating beach water quality for public health protection. SIGNIFICANCE AND IMPACT OF THE STUDY: These findings suggest that laboratory performance is not an inhibitor to the adoption of coliphage as a new indicator for assessing recreational health risk.
    Keywords Enterococcus ; United States Environmental Protection Agency ; coliphages ; health promotion ; risk ; water quality
    Language English
    Dates of publication 2022-08
    Size p. 340-348.
    Publishing place John Wiley & Sons, Ltd
    Document type Article
    Note JOURNAL ARTICLE
    ZDB-ID 1358023-1
    ISSN 1365-2672 ; 1364-5072
    ISSN (online) 1365-2672
    ISSN 1364-5072
    DOI 10.1111/jam.15523
    Database NAL-Catalogue (AGRICOLA)

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  3. Article ; Online: Relationship between coliphage and Enterococcus at southern California beaches and implications for beach water quality management.

    Zimmer-Faust, Amity G / Griffith, John F / Steele, Joshua A / Santos, Bryan / Cao, Yiping / Asato, Laralyn / Chiem, Tania / Choi, Samuel / Diaz, Arturo / Guzman, Joe / Laak, David / Padilla, Michele / Quach-Cu, Jennifer / Ruiz, Victor / Woo, Mary / Weisberg, Stephen B

    Water research

    2022  Volume 230, Page(s) 119383

    Abstract: Coliphage have been suggested as an alternative to fecal indicator bacteria for assessing recreational beach water quality, but it is unclear how frequently and at what types of beaches coliphage produces a different management outcome. Here we conducted ...

    Abstract Coliphage have been suggested as an alternative to fecal indicator bacteria for assessing recreational beach water quality, but it is unclear how frequently and at what types of beaches coliphage produces a different management outcome. Here we conducted side-by-side sampling of male-specific and somatic coliphage by the new EPA dead-end hollow fiber ultrafiltration (D-HFUF-SAL) method and Enterococcus at southern California beaches over two years. When samples were combined for all beach sites, somatic and male-specific coliphage both correlated with Enterococcus. When examined categorically, Enterococcus would have resulted in approximately two times the number of health advisories as somatic coliphage and four times that of male-specific coliphage,using recently proposed thresholds of 60 PFU/100 mL for somatic and 30 PFU/100 mL for male-specific coliphage. Overall, only 12% of total exceedances would have been for coliphage alone. Somatic coliphage exceedances that occurred in the absence of an Enterococcus exceedance were limited to a single site during south swell events, when this beach is known to be affected by nearby minimally treated sewage. Thus, somatic coliphage provided additional valuable health protection information, but may be more appropriate as a supplement to FIB measurements rather than as replacement because: (a) EPA-approved PCR methods for Enterococcus allow a more rapid response, (b) coliphage is more challenging owing to its greater sampling volume and laboratory time requirements, and (c) Enterococcus' long data history has yielded predictive management models that would need to be recreated for coliphage.
    MeSH term(s) Male ; Humans ; Water Quality ; Enterococcus ; Bathing Beaches ; California ; Coliphages ; Feces/microbiology ; Water Microbiology ; Environmental Monitoring/methods
    Language English
    Publishing date 2022-11-19
    Publishing country England
    Document type Journal Article
    ZDB-ID 202613-2
    ISSN 1879-2448 ; 0043-1354
    ISSN (online) 1879-2448
    ISSN 0043-1354
    DOI 10.1016/j.watres.2022.119383
    Database MEDical Literature Analysis and Retrieval System OnLINE

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