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Filth analysis and it's importance

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Introduction

In the multifaceted realm of environmental and food analysis, filth analysis serves as a critical component intertwined with various facets of testing and examination. This comprehensive scrutiny, commonly carried out in specialized microbiological laboratories and food testing facilities, plays a pivotal role in ensuring both food safety and environmental hygiene. Filth analysis involves meticulous investigations into the microscopic world, focusing on the detection and assessment of contaminants, microorganisms, and allergenic substances within food products and environmental samples. These examinations, whether they encompass microbiological testing, allergen analysis, or bacteriological assessment, serve as essential tools in safeguarding public health, maintaining product quality, and sustaining the cleanliness and safety of water supplies for communities. Thus, filth analysis stands as a foundational element in the broader context of environmental and food safety, casting light on potential hazards and enabling informed decisions for both consumers and regulatory bodies.

Understanding filth analysis

Filth analysis is a method used to detect and count light solid impurities of mineral, vegetable, or animal origin in food products1. The analysis is conducted to ensure the protection of consumers from harmful or filthy food products. The light filth test is a common method used for filth analysis, which identifies impurities including insect fragments, animal hair, and rubber


Common types of filth found in food

The types of filth that can be found in food products can vary depending on the type of food and the conditions under which it was produced, processed, transported, and stored. However, some of the most common types of filth that are typically found in food products include:

Type of filth

Food products where found

Insects and insect parts

Grains, cereals, nuts, and seeds

Rodent hairs and excreta

Grains, cereals, and other dry food products

Animal hair and feathers

Meat and poultry products, and other types of food products

Dirt and soil

Fruits and vegetables, and other food products that come into contact with soil during harvesting or transportation

Mold and fungal spores

A variety of food products, particularly those that are moist or have been stored in humid conditions


What are the health risks of consuming filth in food

Consuming filth in food can pose a number of health risks, depending on the type and amount of filth present in the food. Some of the potential health risks of consuming filth in food include:

Foodborne illness: Many types of filth, such as faecal matter, can contain harmful bacteria or other pathogens that can cause foodborne illness, such as Salmonella, E. coli, and Campylobacter,

Allergic reactions: Some types of filth, such as insect parts and animal hair, can trigger allergic reactions in some people.

Physical injury: Consuming filth such as sharp pieces of glass, metal or plastic can cause physical injury to the digestive system.

Psychological stress: The thought of eating filth can be highly disturbing and cause psychological stress in some individuals.

Contamination by toxins: Some types of filth, such as mold and fungal spores, can produce toxins that can contaminate food and cause illness.

Market overview

The global food safety testing market was valued at USD 20,990.3 million in 2022 and is expected to grow at a CAGR of 7.8% from 2023 to 2030, reaching a projected market size of USD 38,778.2 million by 2030. The increasing incidence of foodborne illnesses, rising consumer awareness regarding food safety, and stringent food safety regulations by various governments and regulatory bodies are some of the key factors driving the growth of the food safety testing market.

Food Safety Testing

 

Recall incidents

A recent recall of baked goods in Florida was announced due to potential adulteration with insect filth. The recall affects more than 200,000 units of the product, and the manufacturer is based in Spain. A food company in Sacramento has issued a voluntary recall of all its soy products, including soy sauce, soy milk, and tofu, due to potential contamination with filth.

FSSAI standards for filth determination

The FSSAI (Food Safety and Standards Authority of India) has provided a method for the determination of extraneous matter and other refractions in whole spices (Method No. FSSAI 10.002:2021). The method covers the visual examination of spices to detect visible filth, such as insect damaged matter, broken or damaged seeds, and unripe or discoloured fruits. It also covers the detection of specific types of extraneous matter in different spices, such as tendrils, mother cloves, and light seeds in cardamom. The method is based on the detection of both organic and inorganic extraneous matter, including whole insects or insect fragments, sticks, feathers, and stones. The definitions provided include pinheads (very small berries), broken berries, mother cloves, khoker cloves (fermented cloves), headless cloves, defective rhizomes, and floral waste (unattached parts of Crocus sativus flowers).

Analysis

The FSSAI's Manual of Methods of Analysis of Foods provides guidelines for the analysis of filth in food products

Type of Filth

Separation Method

Examples

Heavy Filth

Sedimentation based on different densities of filth, food particles, and immersion liquids such as CHCl3

Insect and rodent excreta pellets and pellet fragments, sand, and soil

Light Filth

Floating them in an oil-aqueous liquid mixture

Insect fragments, whole insects, rodent hairs, and feather barbules

Sieved Filth

Separated quantitatively from food products by using selected sieve mesh

Filth particles of specific size ranges, such as insect fragments, hair, or feathers, separated from the product by a sieve of specific mesh size


AOAC methods used and matrix

AOAC International (Association of Official Analytical Chemists) is a non-profit scientific organization that develops and validates analytical methods for food and agricultural products. The methods listed above are used for the detection of filth, which is any extraneous matter, including but not limited to dirt, hair, feathers, and insects, that may be present in food. The methods employ visual examination and gravimetry techniques to detect and quantify filth in various matrices, including pasta, flour, spices, and other food products. These methods are widely accepted by regulatory agencies, such as the United States Food and Drug Administration (USFDA), for food safety and quality control.

Method

Analyte

Matrix

AOAC 969.41 by Visual Examination

Light Filth

Alimentary Pastas

AOAC 972.32 by Visual Examination

Light Filth (pre- and post-milling)

White Flour

AOAC 975.48 by Visual Examination-Gravimetry

Light and Heavy Filth

Spices and Condiments

AOAC 965.40

Heavy Filth (per 25g)

Herbs, Spices & Condiments

AOAC 975.48

Heavy Filth (10g)

Herbs, Spices & Condiments

AOAC 975.48

Light Filth (per 10g)

Herbs, Spices & Condiments

AOAC 981.18

Light Filth (per 10g)

Tamarind Paste, Tamarind Concentrate, Tamarind Pulp

AOAC 993.26

Light Filth (per 50g)

Wheat Flour (Whole Wheat)

AOAC 972.32

Light Filth (per 50g)

Cereals, Pulses & Cereal Products

AOAC 950.5

Filth Test

Cardamom, Mustard, Asafoetida, Clove, Ginger, Garlic, Nutmeg, Dhania, Chilli Oleoresins, Masala, Imli, Fenugreek, Nutmeg, Mace, Amchoor, Celery, Pepper, Cumin, Fennel, Cinnamon, Staranise, Turmeric and other Herbs and spices


Eurofins role in Filth analysis

Eurofins is a global leader in food testing services and offers a wide range of testing and analysis services, including filth testing. Eurofins has extensive experience in testing for a variety of filth contaminants, including insect fragments, rodent hairs, and other extraneous matter. The company has state-of-the-art laboratories equipped with cutting-edge technology and experienced analysts trained in the latest testing methodologies. Eurofins provides a range of filth testing services, including visual examination, sieve analysis, and microscopy. The company uses various microscopy techniques, such as light microscopy, scanning electron microscopy (SEM), and Fourier-transform infrared spectroscopy (FTIR), to detect and identify filth contaminants accurately. Eurofins also provides comprehensive testing services for a variety of food products, including spices, herbs, and condiments. The company follows strict quality control measures and adheres to international testing standards to ensure accurate and reliable results. Eurofins' filth testing services can help food manufacturers and suppliers ensure that their products meet the regulatory requirements and quality standards.


US FDA LAAF Recognition

Eurofins Analytical Services India, based in Bangalore, has received recognition from the US Food and Drug Administration (FDA) under the Laboratory Accreditation for Analyses of Foods (LAAF) program. This achievement makes Eurofins the first laboratory in Asia to receive this recognition. The LAAF program ensures the safety and quality of food in the United States by accrediting laboratories that perform testing of foods regulated by the FDA.

The laboratory is accredited to ISO/IEC 17025:2017 and has received FDA LAAF recognition. Eurofins Analytical Services India uses various analytical methods to determine the presence and levels of determinants/analytes such as filth, heavy metals (lead, cadmium, arsenic, mercury), and biological contaminants (Escherichia coli, Salmonella, Listeria monocytogenes) in different types of food and food products shown in table

Fields of testing

MATERIAL/ MATRIX

Determinant(S)/ Analyte(S)

Method Reference

Chemical

Alimentary Pastes

Filth

AOAC 969.41 Light Filth in Alimentary Pastes

Spices & condiments

AOAC 975.48 Heavy and Light Filth in Spices

Whole Wheat flour

AOAC 993.26 Light Filth in Whole Wheat Flour

Food & Food products (Rice, Guar gum, infant food, nutritional supplement, Nutraceutical, oil seed and nuts, herbs, condiments & spices, processed and canned food,ready to eat food, honey, shrimp, prawn, bakery and confectionary

Lead

AOAC 2015.01 Heavy Metals in Food

Inductively Coupled Plasma– Mass Spectrometry

Cadmium

Arsenic

Mercury

Biological

Food & Food products (Rice, Guar gum, infant food, nutritional supplement, Nutraceutical, oil seed and nuts, herbs, condiments & spices, processed and canned food,ready to eat food, honey, shrimp, prawn, bakery and confectionary

Escherichia coli

ISO 16649-2 Horizontal method for the enumeration of beta- glucuronidase-positive Escherichia coli — Part 2: Colony-count technique at 44 degrees C using 5-bromo-4- chloro-3-indolyl beta-D- glucuronide

Salmonella

US FDA BAM Chapter 5 Salmonella

Listeria monocytogenes

ISO 11290-1 Horizontal method for the detection and enumeration of Listeria monocytogenes and of Listeria

spp. — Part 1: Detection method


References

  1. Tilocca, M. G., Caneglias, E., Vodret, B., Mancuso, M. R., Zimmardi, A., Manno, C., & Schiavo, M. R. (2015). Analysis of Foreign Matter in Foodstuffs Using the Light Filth Test: Report 2012-2013. Italian Journal of Food Safety, 4(3). https://doi.org/10.4081/ijfs.2015.4504
  2. https://www.livescience.com/55459-fda-acceptable-food-defects.html
  3. Gorham JR. Foodborne Filth and Human Disease. J Food Prot. 1989 Sep;52(9):674-677. doi: 10.4315/0362-028X-52.9.674. PMID: 31003284.
  4. https://www.grandviewresearch.com/industry-analysis/food-safety-testing-industry
  5. https://www.foodsafetynews.com/2022/06/baked-goods-from-spain-recalled-in-florida-over-adulteration-from-insect-filth/
  6. https://www.cbsnews.com/sanfrancisco/news/sacramento-food-manufacturer-recalls-soy-products-due-to-filth/
  7. https://www.fssai.gov.in/upload/uploadfiles/files/CEREALS_AND_PRODUCTS.pdf
  8. https://www.pfndai.org/Document/Gazette/FSSAI/09Sept2020/13.Draft%20Compendium_Food_Additives_Regulations_13_08_2020.pdf