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Subject Food Authenticity & Contamination Identification
Sandwich sample wrapped in a napkin was sent to the lab for DNA analysis for maggot or insect materials contamination. The DNA analysis samples were taken from the cheese, egg, meat and bread around the bite mark. There were "white granules" spread in the burger that were included in DNA analysis. DNA was extracted using Tissue Extraction kit on an automatic DNA extraction instrument. DNA was analyzed for standard DNA barcode for mitochondrial COI (cytochrome c oxidase I) gene as well as universal DNA mini-barcode for COI.

The results showed that the cheese was from cow, the meat was from pork. The egg did not produce any amplifiable DNA and no DNA sequence available. The bread had three types of DNA materials including wheat (Triticum aestivum), cow (Bos taurus) and beetle DNA (Ochthebius minimus, Dendroacalles anagaensis or Prosimulium arvum). Although universal DNA mini-barcode could not reproduce beetle DNA sequences due to quantity of the trace amount of beetle DNA, it is still possible that the sandwich was contaminated with beetle larva (such as mealworm), instead of "maggot (fly larvae)". In addition, the sandwich bread and meat was dissected under microscope and no "maggot" like larvae or worms were observed, suggesting the beetle larva perhaps only presented on the surface.
Ann Arbor, MI (LAB 08) - NVLAP Lab Code 101048-4Atlanta, GA (LAB 07) - NVLAP Lab Code 101048-1Baton Rouge, LA (LAB 25) - NVLAP Lab Code 200375-0Beltsville, MD (LAB 19) - NVLAP Lab Code 200293-0Boston, MA (LAB 13) - NVLAP Lab Code 101147-0Buffalo, NY (LAB 14) - NVLAP Lab Code 200056-0Carle Place, NY (LAB 06) - NVLAP Lab Code 101048-10Charlotte, NC (LAB 41) - NVLAP Lab Code 200841-0Chicago, IL (LAB 26) - NVLAP Lab Code 200399-0Cinnaminson, NJ (LAB List in Description) - NVLAP Lab Code 101048-0Dallas, TX (LAB 11) - NVLAP Lab Code 600111-0Denver, CO (LAB 22) - NVLAP Lab Code 200828-0EMSL Canada - Calgary, AB (LAB 65) - NVLAP Lab Code 500100-0EMSL Canada - Montreal, QC (LAB 68) - NVLAP Lab Code 201052-0EMSL Canada - Ottawa, ON (LAB 67) - NVLAP Lab Code 201040-0EMSL Canada - Toronto, ON (LAB 55) - NVLAP Lab Code 200877-0EMSL Canada - Vancouver, BC (LAB 69) - NVLAP Lab Code 201068-0Fort Lauderdale, FL (LAB 56) - NVLAP Lab Code 500085-0Houston, TX (LAB 15) - NVLAP Lab Code 102106-0Huntington Beach, CA (LAB 33) - NVLAP Lab Code 101384-0Indianapolis, IN (LAB 16) - NVLAP Lab Code 200188-0Inland Empire (Ontario), CA (LAB 71) - NVLAP Lab Code 600239-0Jacksonville, FL (LAB 54) - NVLAP Lab Code 600265-0Kernersville, NC (LAB 02) - NVLAP Lab Code 102104-0Las Vegas, NV (LAB 31) - NVLAP Lab Code 600140-0Miami, FL (LAB 17) - NVLAP Lab Code 200204-0Minneapolis, MN (LAB 35) - NVLAP Lab Code 200019-0New York, NY (LAB 03) - NVLAP Lab Code 101048-9Orlando, FL (LAB 34) - NVLAP Lab Code 101151-0Phoenix, AZ (LAB 12) - NVLAP Lab Code 200811-0Piscataway, NJ (LAB 05) - NVLAP Lab Code 101048-2Plymouth Meeting, PA (LAB 18) - NVLAP Lab Code 200699-0Raleigh, NC (LAB 29) - NVLAP Lab Code 200671-0Rochester, NY (LAB 53) - NVLAP Lab Code 600183-0Salem, NH (LAB 23) - NVLAP Lab Code 201051-0San Diego, CA (LAB 43) - NVLAP Lab Code 200855-0San Leandro, CA (LAB 09) - NVLAP Lab Code 101048-3Seattle, WA (LAB 51) - NVLAP Lab Code 200613-0South Pasadena, CA (LAB 32) - NVLAP Lab Code 200232-0South Portland, ME (LAB 62) - NVLAP Lab Code 500094-0St. Louis, MO (LAB 39) - NVLAP Lab Code 200742-0Tampa, FL (LAB 93) - NVLAP Lab Code 600215-0Wallingford, CT (LAB 24) - NVLAP Lab Code 200700-0West Palm Beach, FL (LAB 57) - NVLAP Lab Code 600206-0
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