The 3M Petrifilm plate is an all-in-one plating system made by the Food Safety Division of the 3M Company. A majority of its use is for the testing of foodstuffs. Petrifilm plates are designed to be as accurate as conventional plating methods.
What is Petrifilm used for?
3M Petrifilm The Petrifilm AC plate is a ready-made culture medium that is used for counting aerobic bacteria. It contains standard methods nutrients, a cold-water gelling agent, and an indicator dye that facilitates colony counting (3M Microbiology, 2005).
How do you count 3M Petrifilm?
3M Petrifilm Aerobic Count Plate with a few bacterial colonies. When colonies number more than 300, estimate the count. Determine the average number of colonies in one square (1cm2) and multiply it by 20 to obtain the total count per plate.
What are two advantages of Petrifilm plates over petri dishes?
The advantages
- 85% less space than the classic agar.
- 45% less work.
- 80% increased efficiency.
- 1/2 faster data.
What is Petrifilm made of?
(Freitas et al., 2009; Beloti et al., 2002; Nero et al., 2000). Petrifilm™ is composed by a double film system: on film is the basis and it is covered by dehydrated nutrients and gelling agents soluble in cold and a superior polyethylene film that contains indicators and gelling agents.
What is aerobic plate count Petrifilm?
The 3M™ Petrifilm™ Aerobic Count Plate is a time-saving, sample-ready plate designed to determine total aerobic bacteria populations. A built-in grid facilitates counting colonies, helping to provide fast, precise and consistent results.
How do you incubate Petrifilm?
Incubate Petrifilm count plates with the clear side up in stacks of 20 or less at a temperature of 25°C for 3-5 days. standard Quebec-type colony counter or other magnified light source. Refer to Guide to Interpretation when reading results.
What is the advantage of using 3M Petrifilm as compared to traditional agar petri dishes?
3M™ Petrifilm™ Plates and efficiency Shelf stable and nearly as thin as paper, 3M™ Petrifilm™ Plates take up to 85% less of your valuable counter and storage space compared to agar plates.
How do I report TNTC?
TNTC can be reported out several ways ac- cording to different authorities. ASTM recommends reporting this out as >”upper limit” (6). For exam- ple, a 1:10 dilution with more than 200 CFU on a spread plate would be reported as “>2,000 CFU/ml (or gram).
What is the correct countable range for a Petrifilm count?
approximately 30 to 300
The countable range on Petrifilm is approximately 30 to 300. All red colonies are counted. For swab samples counts should be expressed in CFU/cm2.
Is the 3M Petrifilm aerobic count plate available?
Pricing and availability is not currently available. storage temp. The 3M Petrifilm Aerobic Count Plate is a time-saving plate count of microorganisms in food, dairy products, water and waste water.
What are the ingredients in 3M Petrifilm coliform count?
3M™ Petrifilm™ Coliform Count (CC) Plates contain Violet Red Bile (VRB) nutrients, a cold-water-soluble gelling agent, and a tetrazolium indicator that facilitates colony enumeration. The top film traps gas produced by the lactose fermenting coliforms. U.S. Food and Drug…
What is 3M Petrifilm™ yeast and mold count plate?
3M™ Petrifilm™ Yeast and Mold Count Plates identify food borne yeast and mold in your food products and in your food processing environment. Yeasts are easily differentiated from molds on the plate: – Yeasts are typically indicated by small, blue-green colonies with defined edges…
What is a Petrifilm plate used for?
Versatile: It can be used for air, swab or surface contact environmental sampling The 3M™ Petrifilm™ Aerobic Count Plate is a time-saving, sample-ready plate designed to determine total aerobic bacteria populations. A built-in grid facilitates counting colonies, helping to provide fast, precise and consistent results.
