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Aerobic Plate Count

Measurement of Mesophilic Aerobic Bacteria in a given sample

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Aerobic Plate Count – Measurement of Mesophilic Aerobic Bacteria in a given sample

The aerobic plate count is a microbiological technique used to assess the number of viable microorganisms in a given test sample. It is also known as standard plate count, aerobic mesophilic count, total plate count, or aerobic colony count. The test is based on the assumption that each cell will form a colony in an agar medium containing all the required nutrients.

Aerobic Plate Count Test Method

  • Test samples are prepared based on the type of food products (frozen, chilled, pre-cooked, or prepared foods) or cosmetics products (Liquids, Solids and powders, cream and oil-based products, Aerosol of powders, soap, liquids, and other materials, Anhydrous materials).
  • A homogenized solution containing the test sample is serially diluted 10 times (10-1 to 10-10).
  • 0.1 ml of each dilution is transferred and plated on different Petri dishes containing agar growth medium.
  • Plates are incubated at 35°C ± 1°C for 48 ± 2 hours.
  • After incubation, the plates are examined for the presence of aerobic bacteria
Aerobic Plate Count Test

Importance of Aerobic Plate Count (APC) Test

Quality control in the food industry

  • Safety assessment: The APC test ensures food safety by detecting microbial contamination levels.
  • Spoilage prevention: It helps extend the shelf life of products by identifying potential microorganisms.
  • Regulatory compliance: Testing ensures that products meet the requirements set by regulatory authorities

Pharmaceutical industry

  • Product sterility: Ensures the sterility of pharmaceutical products which are intravenously administered. 
  • Manufacturing hygiene: Monitors the cleanliness of manufacturing environments and processes.

Clinical and healthcare settings

  • Infection control: Helps monitor hospital-acquired infections by assessing the microbial load on surfaces and equipment.
  • Sanitation monitoring: Ensures the effectiveness of sterilization protocols in healthcare facilities.

Cosmetics and personal care products

  • Product safety: Ensures the microbiological safety of cosmetics and personal care products.

Pros and Cons of Aerobic Plate Count (APC) Test

Pros

  • Simple and cost-effective: APC is a simple and cost-effective method to assess microbial count as it does not require sophisticated instruments.
  • Quantitative data: Provides a direct count of viable aerobic bacteria offering quantitative data on microbial load.
  • Broad application: Applicable to a wide range of sample types including food, water, and environmental samples.
  • Hygiene assessment: Serves as an indicator of the general hygiene and sanitary conditions of the sample and the environment from which it was collected.
  • Regulatory compliance: Testing is often mandated by regulatory authorities to obtain compliance.

Cons

  • Limited specificity: APC measures the total number of aerobic bacteria but does not differentiate the type of bacteria.

At Microbe Investigations Switzerland (MIS), we offer a range of antibacterial and antiviral test methods that validate the antimicrobial efficacy of many products. For any query regarding the Aerobic Plate Count test, contact our expert to get an expert consultation.

FAQs

Aerobic Plate Count (APC), also known as Total Plate Count (TPC) or Standard Plate Count (SPC), is a microbiological test that estimates the number of viable aerobic bacteria in a sample.

Aerobic Plate Count test is used for the microbiology analysis of food and cosmetics products. It also applies to indicate the bacterial populations in beverages and water samples.

The Aerobic Plate Count test takes one week to complete.

Aerobic plate count is important in food industries as it is frequently used to determine microbial contaminations in food samples, thus aiding in the identification of potential spoilage and contamination.

Aerobic incubation refers to the process of incubating a sample in the presence of oxygen. It is used in microbiological testing to culture and count aerobic bacteria.

Microbial count refers to the enumeration of microorganisms in a sample. This can include bacteria, fungi, and other microbes.

Aerobic Plate Count indicates the level of contamination by aerobic bacteria in a sample. High APC values suggest higher levels of microbial activity.

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