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AN OVERVIEW OF MICROBIAL CONTAMINATION AND PUBLIC HEALTH
Babajanova Gulchekhra Bakhtiyorovna
Assistant at the Medical faculty of Alfraganus University
Email: gulchexra197129@gmail.com
https://doi.org/10.5281/zenodo.13968710
Abstract
Microbial contamination of food can occur at any point in the food supply chain, from
production to consumption. Therefore, it is essential to follow proper hygiene and
manufacturing practices throughout the entire process to prevent microbiological
contamination, which can lead to significant morbidity and mortality among consumers.
Recent research has focused on developing innovative technologies to improve food safety
and quality without compromising its taste or nutritional value. Future studies should
prioritize the creation of simple, cost-effective, and rapid tests for detecting and controlling
microbial contamination, as well as the development of new food processing techniques.
Keywords:
microbial contamination, food contamination, innovative technologies,
public health, foodborne diseases, food hygiene, food safety, good hygienic practices,
manufacturing practices.
Currently, there is growing interest in food hygiene, safety, and the incidence of
foodborne diseases due to their close connection to public health. Microbiological
contamination of food by pathogenic microorganisms, along with their persistence,
replication, and toxin production, has become a significant concern for consumers, the food
industry, and regulatory agencies worldwide. Contamination can occur at any stage of the
food chain but can be prevented by adhering to good manufacturing practices, implementing
Hazard Analysis Critical Control Point (HACCP) principles, ensuring raw material control, and
maintaining the cold chain at both industry and retail levels. This contamination includes not
only the growth of harmful microbes but also the production of toxic metabolites, such as
mycotoxins, or the formation of biofilms.
Microbial contamination is also closely linked to food losses resulting from spoilage and
waste. As the global human population continues to grow, so does the demand for food. The
Food and Agriculture Organization of the United Nations estimates that one-third (1.3 billion
tons per year) of food produced for human consumption is lost due to spoilage or waste. Poor
waste management can pose public health risks and lead to environmental problems such as
disease outbreaks and air pollution. Although foodborne disease transmission has received
more attention due to its direct public health implications, food spoilage also leads to
significant economic losses, negative publicity for the food industry, and reduced food
supplies. Effective food management is increasingly recognized as a critical factor for
sustainable development and achieving global sustainability goals (SDGs 12 and 13). Reducing
food waste offers both economic and environmental benefits, contributing to more
sustainable food systems.
1. Foodborne Diseases
Microbial foodborne diseases (FBD) are a major public health concern due to the high
risk of microbial contamination from various biological hazards. These diseases cause
significant personal suffering, preventable deaths, and an avoidable economic burden. Each
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year, at least two billion people worldwide are affected by FBD, making it one of the most
pressing public health issues today..
Every stage of the food supply chain—from production to consumption—can pose a
potential risk for FBD, whether through food production, processing, packaging,
transportation, or handling. Consumers, as the final point in the food safety chain, are often
referred to as the “final line of defense” against FBD. Common symptoms caused by foodborne
pathogens include nausea, vomiting, abdominal discomfort, diarrhea, fever, and loss of
appetite.
Preventing foodborne diseases requires implementing good manufacturing practices,
rigorous control of raw materials, and maintaining the cold chain throughout the industry and
retail sectors. Several studies have underscored the importance of food safety training and
education for food handlers, as gaps in knowledge about microbial hazards, food storage
temperatures, cross-contamination risks, and personal hygiene can contribute to FBD
outbreaks. Strengthening education and training for food handlers can improve food handling
practices, ensuring both food safety and quality for consumers, and reducing the incidence of
foodborne diseases.
2. Food Preservation Techniques
To enhance the safety and extend the shelf life of food products, several traditional food
preservation methods have been used to control microbial growth. These include techniques
such as chilling, freezing, nutrient restriction, reducing water activity, acidification,
pasteurization, sterilization, fermentation, and the use of chemical and biological
antimicrobials. Among these, thermal treatments are the most widely applied methods for
microbial inactivation in the food and beverage industries. However, these methods often
negatively affect the sensory and nutritional properties of food, leading to reduced consumer
acceptability. The current challenge is to improve food safety and quality without
compromising nutritional, functional, and sensory attributes, driving the development of
innovative technologies in the food industry.
In response, several non-thermal treatments have been developed that do not rely on
raising food temperature to inactivate bacteria. These innovative techniques aim to improve
food safety and shelf life. One such approach involves the use of free or encapsulated natural
antimicrobial compounds, either alone or in combination with other technologies, to reduce
microbial populations in food products. Recent studies have focused on the use of nisin-
loaded nanoparticles as an effective antimicrobial agent in food formulations and packaging.
These nano-carriers, which include nano-liposomes, nano-emulsions, solid lipid
nanoparticles, and bio-polymeric nanoparticles, offer benefits such as sustained release,
prevention of undesirable interactions, and high stability, all while preserving the sensory and
nutritional qualities of food during storage.
Another emerging technology in the food industry is High Hydrostatic Pressure (HHP), a
non-thermal method that inactivates a wide range of foodborne pathogens and harmful
enzymes by applying pressures above 100 MPa through mechanically pressurized water. This
process minimally impacts the overall quality, nutritional value, and flavor of the food.
Pressures between 300 and 600 MPa have been shown to effectively prevent microbial
growth, ensuring the quality and safety of food products.
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A novel approach gaining popularity in the scientific community is antimicrobial
photodynamic treatment (aPDT). This technique involves the use of visible or near-infrared
light combined with a photosensitizer (PS) in the presence of molecular oxygen to generate
reactive oxygen species (ROS), which are responsible for microbial cell death. Since ROS can
interact with various biomolecules and cell structures, the development of resistance to aPDT
is a potential concern, and further studies are needed. Nevertheless, the use of non-toxic
photosensitizers and harmless visible light makes aPDT a promising alternative for food
applications, as it can inactivate a wide range of microorganisms, including bacteria (both
vegetative cells and spores), yeasts, molds, protozoa, and viruses.
Research by Woo-Ju et al. has explored the non-thermal effects of microwave radiation,
which can reduce pathogen presence and inactivate enzymes while preserving the nutritional
properties of foods. Factors influencing the effectiveness of microwaves for microbial
inactivation include power levels, electric field frequency, treatment duration, and the
geometry and dielectric properties of the food. While research on this topic is still limited,
further studies are necessary to optimize microwave technology for reducing microbial
contamination in food.
Food irradiation has also garnered attention as a non-thermal technology, applying
ionizing radiation in small doses to decontaminate food and extend its shelf life by damaging
bacterial DNA. However, concerns over potential radioactivity generation in food make this
technique controversial. Additionally, the low penetration power of irradiation limits its
efficiency, especially on foods with irregular surfaces. Therefore, it has been suggested that
combining irradiation with other technologies could provide a more effective solution for
controlling microbial contamination in food.
References:
1.
Do Prado-Silva L., Brancini G.T.P., Braga G.Ú.L., Liao X., Ding T., Sant’Ana A.S.
Antimicrobial photodynamic treatment (aPDT) as an innovative technology to control
spoilage and pathogenic microorganisms in agri-food products: An updated review. Food
Control. 2022;132:108527. doi: 10.1016/j.foodcont.2021.108527. [
2.
Jaffee S., Henson S., Unnevehr L., Grace D., Cassou E. The safe food imperative:
Accelerating progress in low- and middle-income countries. World Bank. 2019;46:48. doi:
10.1596/978-1-4648-1345-0. [
3.
Potortì A.G., Tropea A., Lo Turco V., Pellizzeri V., Belfita A., Dugo G., Di Bella G.
Mycotoxins in spices and culinary herbs from Italy and Tunisia. Nat. Prod. Res. 2020;34:167–
171. doi: 10.1080/14786419.2019.1598995. [
4.
Holban A.M., Grumezescu A.M. Handbook of Food Bioengineering. Academic Press;
Cambridge, MA, USA: Elsevier; London, UK: 2018. Microbial Contamination and Food
Degradation. Volume 2, pp. 25–26; Volume 4, pp. 86–89. [
5.
Odeyemi O.A., Alegbeleye O.O., Strateva M., Stratev D. Understanding spoilage microbial
community and spoilage mechanisms in foods of animal origin. Compr. Rev. Food Sci. Food
Saf. 2020;19:311–331. doi: 10.1111/1541-4337.12526. [
6.
FAO The State of Food and Agriculture 2019. Moving forward on Food Loss and Waste
Reduction. Rome. Licence: CC BY-NC-SA 3.0 IGO. 2019. [(accessed on 15 June 2022)].
Available online:
YOSH OLIMLAR
ILMIY-AMALIY KONFERENSIYASI
in-academy.uz/index.php/yo
74
7.
Tropea A., Ferracane A., Albergamo A., Potortì A.G., Lo Turco V., Di Bella G. Single Cell
Protein Production through Multi Food-Waste SubstrateFermentation. Fermentation.
2022;8:91. doi: 10.3390/fermentation8030091. [
8.
Iulietto M.F., Sechi P., Borgogni E., Cenci-Goga B.T. Meat spoilage: A critical review of a
neglected alteration due to ropy slime producing bacteria. Ital. J. Anim. Sci. 2015;14:4011. doi:
10.4081/ijas.2015.4011. [
9.
Tropea
A.
Food
Waste
Valorization.
Fermentation.
2022;8:168.
doi:
10.3390/fermentation8040168. [
10.
Parra P.A., Kim H., Shapiro M.A., Gravani R.B., Bradley S.D. Home food safety knowledge,
risk perception, and practices among Mexican-Americans. Food Control. 2014;37:115–125.
doi: 10.1016/j.foodcont.2013.08.016. [
