Varma M - Search Results

1

Standardization of enterococci density estimates by EPA qPCR methods and comparison of beach action value exceedances in river waters with culture methods.

Haugland RA, Siefring SD, Varma M, Dufour AP, Brenner KP, Wade TJ, Sams E, Cochran S, Braun S, Sivaganensan M. Haugland RA, et al. Among authors: varma m. J Microbiol Methods. 2014 Oct;105:59-66. doi: 10.1016/j.mimet.2014.07.007. Epub 2014 Jul 16. J Microbiol Methods. 2014. PMID: 25038459

2

MPN estimation of qPCR target sequence recoveries from whole cell calibrator samples.

Sivaganesan M, Siefring S, Varma M, Haugland RA. Sivaganesan M, et al. Among authors: varma m. J Microbiol Methods. 2011 Dec;87(3):343-9. doi: 10.1016/j.mimet.2011.09.013. Epub 2011 Oct 1. J Microbiol Methods. 2011. PMID: 21989298

3

Comparison of Enterococcus quantitative polymerase chain reaction analysis results from fresh and marine waters on two real-time instruments.

Sivaganensan M, Varma M, Haugland RA. Sivaganensan M, et al. Among authors: varma m. Anal Biochem. 2012 Nov 1;430(1):68-74. doi: 10.1016/j.ab.2012.07.020. Epub 2012 Aug 1. Anal Biochem. 2012. PMID: 22863982

4

Influences of sample interference and interference controls on quantification of enterococci fecal indicator bacteria in surface water samples by the qPCR method.

Haugland RA, Siefring S, Lavender J, Varma M. Haugland RA, et al. Among authors: varma m. Water Res. 2012 Nov 15;46(18):5989-6001. doi: 10.1016/j.watres.2012.08.017. Epub 2012 Aug 27. Water Res. 2012. PMID: 22981586

5

Comparison of Enterococcus quantitative polymerase chain reaction analysis results from Midwest U.S. river samples using EPA Method 1611 and Method 1609 PCR reagents.

Sivaganesan M, Siefring S, Varma M, Haugland RA. Sivaganesan M, et al. Among authors: varma m. J Microbiol Methods. 2014 Jun;101:9-17. doi: 10.1016/j.mimet.2014.03.004. Epub 2014 Mar 26. J Microbiol Methods. 2014. PMID: 24681207

6

Development and evaluation of a culture-independent method for source determination of fecal wastes in surface and storm waters using reverse transcriptase-PCR detection of FRNA coliphage genogroup gene sequences.

Paar J 3rd, Doolittle MM, Varma M, Siefring S, Oshima K, Haugland RA. Paar J 3rd, et al. Among authors: varma m. J Microbiol Methods. 2015 May;112:28-35. doi: 10.1016/j.mimet.2015.02.015. Epub 2015 Mar 3. J Microbiol Methods. 2015. PMID: 25744574

7

Multi-laboratory survey of qPCR enterococci analysis method performance in U.S. coastal and inland surface waters.

Haugland RA, Siefring S, Varma M, Oshima KH, Sivaganesan M, Cao Y, Raith M, Griffith J, Weisberg SB, Noble RT, Blackwood AD, Kinzelman J, Anan'eva T, Bushon RN, Stelzer EA, Harwood VJ, Gordon KV, Sinigalliano C. Haugland RA, et al. Among authors: varma m. J Microbiol Methods. 2016 Apr;123:114-25. doi: 10.1016/j.mimet.2016.01.017. Epub 2016 Feb 2. J Microbiol Methods. 2016. PMID: 26844886

8

Quantification of plasmid DNA standards for U.S. EPA fecal indicator bacteria qPCR methods by droplet digital PCR analysis.

Sivaganesan M, Varma M, Siefring S, Haugland R. Sivaganesan M, et al. Among authors: varma m. J Microbiol Methods. 2018 Sep;152:135-142. doi: 10.1016/j.mimet.2018.07.005. Epub 2018 Jul 11. J Microbiol Methods. 2018. PMID: 30017849 Free PMC article.

9

Large-scale comparison of E. coli levels determined by culture and a qPCR method (EPA Draft Method C) in Michigan towards the implementation of rapid, multi-site beach testing.

Haugland R, Oshima K, Sivaganesan M, Dufour A, Varma M, Siefring S, Nappier S, Schnitker B, Briggs S. Haugland R, et al. Among authors: varma m. J Microbiol Methods. 2021 May;184:106186. doi: 10.1016/j.mimet.2021.106186. Epub 2021 Mar 22. J Microbiol Methods. 2021. PMID: 33766609 Free PMC article.

10

Improved real-time PCR assays for the detection of fecal indicator bacteria in surface waters with different instrument and reagent systems.

Siefring S, Varma M, Atikovic E, Wymer L, Haugland RA. Siefring S, et al. Among authors: varma m. J Water Health. 2008 Jun;6(2):225-37. doi: 10.2166/wh.2008.022. J Water Health. 2008. PMID: 18209285

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