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        • Pseudomonas aeruginosa
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        • Total Yeast and Mold
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        • Hop Latent Viroid
        • Lettuce Chlorosis Virus
        • Cannabis Cryptic Virus
        • Powdery Mildew
        • Botrytis
        • Russet Mites
        • Fusarium
      • Genetic Trait Screening
        • CBDA Synthase
        • THCA Synthase
        • Gender
      • DNA Purification
        • Free DNA Removal Kit
        • Flower & Leaf
        • Edibles & Extracts
      • Genetic Sequencing
        • Cannabis and Hemp Genotyping and Sequencing
        • Microbial Identification
      • Environmental Screening
    • Products
      • PathoSEEK® Microbial Safety Testing Platform
        • NEW! Aspergillus 5-Color Assay
      • Genomics Services for Cannabis and Hemp
      • NEW! Grim Reefer® Free DNA Removal Kit
      • youPCR® Plant Screening Platform
      • FemINDICAtor® qPCR Plant Gender Detection Assay
      • SenSATIVAx® DNA Purification Kit
      • Automation Solutions
    • Distributors
    • Resources
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      • Help Center
      • Cannabis Microbial Testing Regulations by State
      • How Much Can Gender Screening Save You?
      • Validation Documents
        • Microbial Safety Testing
        • Aspergillus 5-Color Multiplex
        • Customer Validation Guide
      • Product Literature – Technical Documents
      • Certificate of Analysis Lookup
      • Crypto Funded Public Genomics
      • MGC Articles
        • Download the Blockchained Cannabis DNA White Paper
        • Cultures Failure to Detect Aspergillus
        • The Live versus Dead Debate
        • Powdery Mildew Detection Research
        • Medicinal Genomics Cannabis Genome Project
        • The Decentralization of Cannabis Genomics
      • Educational Resources
        • Blockchained Cannabis DNA
        • Endocannabinoid Basics
        • Cannabis Sequencing
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          • Epilepsy
          • Pagets Disease
          • Case Study: Human Exome Sequencing
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    Microbial Testing

    Home » Microbial Testing
     Beware of AOAC-Certified Claims for Cannabis Microbial Testing Methods
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    By Ben Amirault
    In Latest News, Microbial Testing, Pathogen Detection
    Posted December 10, 2020

    Beware of AOAC-Certified Claims for Cannabis Microbial Testing Methods

    Note: This blog was originally posted in February 2019 and was updated in December 2020.  The Association of Official Analytical Chemists (AOAC) publishes microbiological and chemical standards [...]

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     After a Century as the ‘Gold Standard’, It’s Time for Plating to be Retired
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    By Kevin McKernan
    In Latest News, Microbial Testing
    Posted July 14, 2020

    After a Century as the ‘Gold Standard’, It’s Time for Plating to be Retired

    In 2020, a Michigan lab contacted us claiming our CFU/cq calculations were not matching their samples, nor did they match a recently released Candida albicans NSI Total Yeast and Mold (TYM) [...]

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     USP Calls for Aspergillus Testing on Cannabis. Names qPCR Best Method ‘By Far’
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    By Frank Priscaro
    In Aspergillus, Latest News, Microbial Testing
    Posted June 10, 2020

    USP Calls for Aspergillus Testing on Cannabis. Names qPCR Best Method ‘By Far’

    Recently, the USP (United States Pharmacopoeia) published an article in the Journal of Natural Products titled, “Cannabis Inflorescence for Medical Purposes: USP Considerations for Quality [...]

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     qPCR is Trusted for COVID-19 Testing and Cannabis Testing
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    By Ben Amirault
    In Latest News, Microbial Testing
    Posted April 7, 2020

    qPCR is Trusted for COVID-19 Testing and Cannabis Testing

    Testing is a critical part of humanity’s fight against COVID-19, helping to allocate resources, make social distancing more effective, and provide helpful data for forecasting. Several giants in [...]

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     Centrifugation is No Substitute for Enrichment
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    By Kevin McKernan
    In Latest News, Microbial Testing
    Posted March 10, 2020

    Centrifugation is No Substitute for Enrichment

    Cannabis testing labs are being presented with a wide variety of microbial testing solutions, each claiming they can shorten test times, increase sensitivity, and lower costs. Given microbial [...]

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     5 Reasons Why Culture Plating Should NOT Be Used for Microbial Safety Testing on Cannabis
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    By Ben Amirault
    In Latest News, Microbial Testing
    Posted October 29, 2019

    5 Reasons Why Culture Plating Should NOT Be Used for Microbial Safety Testing on Cannabis

    Culture-based methods, such as plating, are considered by some to be the “gold standard” of microbial safety testing. After all, the method is used extensively in the food industry and is [...]

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     Solving qPCR’s Live-Dead Problem
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    By Ben Amirault
    In Latest News, Microbial Testing
    Posted October 7, 2019

    Solving qPCR’s Live-Dead Problem

    One of the common objections to using qPCR for microbial testing is the fact that the method does not distinguish between live and dead DNA. PCR primers and probes will amplify any DNA in the [...]

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     Outlawing Vaping Will Not Make it Safer
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    By Kevin McKernan
    In Latest News, Microbial Testing
    Posted September 27, 2019

    Outlawing Vaping Will Not Make it Safer

    Recently, some 450 cases of “vape pen” reported illnesses have allegedly contributed to six fatalities (NEJM). This health threat is serious, and tragic for its victims, but compared to the [...]

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     Why Requiring Testing for Clostridium botulinum on Cannabis is a bad idea
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    By Ben Amirault
    In Latest News, Microbial Testing
    Posted September 12, 2019

    Why Requiring Testing for Clostridium botulinum on Cannabis is a bad idea

    A previous version of draft guidelines for cannabis testing in Florida listed Clostridium botulinum as a target for microbial testing. On the surface, this seems like a prudent action. After all, [...]

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     Could Trichoderma Cause Total Yeast and Mold Failure?
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    By Ben Amirault
    In Latest News, Microbial Testing, Pathogen Detection
    Posted November 27, 2018

    Could Trichoderma Cause Total Yeast and Mold Failure?

    Yes. Although Trichoderma presents no risk to cannabis consumers or patients, it is a fungus, and it will contribute to a Total Yeast and Mold count. Editor’s Note: It has been brought to [...]

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     4 Reasons Why PathoSEEK is the Best Microbial Testing Method for Cannabis
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    By Ben Amirault
    In Latest News, Microbial Testing
    Posted November 13, 2018

    4 Reasons Why PathoSEEK is the Best Microbial Testing Method for Cannabis

      Our Senior Research and Development Scientist, Yvonne Helbert, recently spoke with Alex Beadle from Analytical Cannabis about why the PathoSEEK Microbial Safety Testing Platform is the [...]

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     Correcting Statements Made About Microbial Testing Controversy in Massachusetts
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    By Kevin McKernan
    In Latest News, Microbial Testing, Pathogen Detection
    Posted September 27, 2018

    Correcting Statements Made About Microbial Testing Controversy in Massachusetts

    The Boston Globe recently highlighted an important scientific debate ongoing in the Cannabis testing market of Massachusetts. Daniel Adams wrote this excellent piece on August 21st. On September [...]

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    By Kevin McKernan
    In Microbial Testing, Uncategorized
    Posted April 15, 2018

    Endofungal Bacteria and the implications for Cannabis Safety Testing

    In April of 2018, DigiPath Labs and Medicinal Genomics began a research program to better understand testing discordance with 3M TAC and TYM Petri-Films and PathoSEEK qPCR. Discordant samples [...]

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     DNA-Based Testing Can Distinguish Aspergillus brasiliensis from Aspergillus niger
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    By Ben Amirault
    In Aspergillus, Genomics, Latest News, Microbial Testing
    Posted March 16, 2018

    DNA-Based Testing Can Distinguish Aspergillus brasiliensis from Aspergillus niger

    A case of mistaken identity is causing a disagreement between two Alaska testing labs. According to a KTUU article, state regulators gave an edible marijuana product contaminated with mold to [...]

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     Download The Most Comprehensive Validation of a Microbial Detection Method on Cannabis
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    By Ben Amirault
    In Latest News, Microbial Testing
    Posted February 15, 2018

    Download The Most Comprehensive Validation of a Microbial Detection Method on Cannabis

    Our Science Team completed an extensive manufacturer’s validation, demonstrating our method for purifying DNA and detecting microbial contamination on cannabis flower, concentrates, and infused [...]

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     Our Microbial Safety Testing Platform Has a New Name!
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    By Ben Amirault
    In Aspergillus, Latest News, Microbial Testing
    Posted January 24, 2018

    Our Microbial Safety Testing Platform Has a New Name!

    It’s been almost three years since we launched the PathogINDICAtor® qPCR Microbial Detection Platform. Since its inception, it has been the most accurate and advanced cannabis microbial safety [...]

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     Skipping enrichment puts patients’ lives at risk. Is your lab cutting corners?
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    By Ben Amirault
    In Microbial Testing
    Posted December 14, 2017

    Skipping enrichment puts patients’ lives at risk. Is your lab cutting corners?

    It has been brought to our attention that some cannabis testing labs use methods for microbial detection that do not include an enrichment step. The news is concerning because enrichment is [...]

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     California Microbial Testing Requirements for Cannabis Favorable to qPCR Methods
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    By Ben Amirault
    In Latest News, Microbial Testing
    Posted November 21, 2017

    California Microbial Testing Requirements for Cannabis Favorable to qPCR Methods

    Last week, The Bureau of Cannabis Control released its long-awaited cannabis regulations. The document details the regulations for all aspects of the cannabis industry from cultivation to retail. [...]

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     Is Powdery Mildew Systemic?
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    By Ben Amirault
    In Genomics, Latest News, Microbial Testing
    Posted November 9, 2017

    Is Powdery Mildew Systemic?

    Cannabis growers are divided when it comes to powdery mildew, one of the plant’s most notorious pathogens. In one camp, there are those who believe PM is a systemic pathogen that permeates via [...]

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    By Stephen Dailey
    In Microbial Testing, Pathogen Detection, Uncategorized
    Posted August 7, 2017

    Botrytis Cinerea

    Botrytis Cinerea Botrytis is a systemic mold infection in Cannabis. This mold is often called “Bud Rot” or “grey mold”. It can remain cryptic or dormant for long periods of time before it [...]

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     Microbial Detection Standards for Cannabis Need to Change to Protect Patients
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    By Kevin McKernan
    In Aspergillus, Latest News, Microbial Testing
    Posted February 8, 2017

    Microbial Detection Standards for Cannabis Need to Change to Protect Patients

    On February 7, the Daily Mail reported a cancer patient in northern California died from a fungal infection that authorities suspect was caused by the inhalation of contaminated medical cannabis. [...]

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     Potentially Harmful Shortcomings of Culture-Based Microbial Testing
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    By Ben Amirault
    In Aspergillus, Latest News, Microbial Testing
    Posted November 11, 2016

    Potentially Harmful Shortcomings of Culture-Based Microbial Testing

    The cannabis industry has a problem… Culture-based testing is the industry standard for detecting harmful microbes on cannabis flower, but the most widely used culture-based tests have [...]

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     Cannabis Cultivators and Processors Use Genetic Sequencing for Verification and Stability Programs
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    By Ben Amirault
    In Latest News, Microbial Testing
    Posted October 6, 2016

    Cannabis Cultivators and Processors Use Genetic Sequencing for Verification and Stability Programs

    Medicinal Genomics (MGC) is proud to announce it is partnering with a preliminary group of twelve leading cultivators and processors to develop fully-validated, genomics-based safety and quality [...]

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