Food Additives and Food Acceptability
The Producers and the manufacturers have been challenged by the increasing demand for the safe and high-quality meat and meat products over the past few decades. Particularly, the recent demand for minimally the processed, the easily prepared, and the ready-to-eat meat products combined with the novel concepts of all-natural and clean-label has rapidly increased. These products may contain natural or organic ingredients without artificial preservatives that do not trigger the common food allergies or the sensitivities. The meat and the meat products are highly prone to microbial contamination since they are rich in essential nutrients and perishable. This is further accelerated by some intrinsic factors including pH and water activity of the fresh meat. In general, the freshest meat has a water activity value higher than 0.85, and its pH value falls within the favorable pH range for spoilage bacteria of the meat. Hence, deterioration in quality and potential public health issues is common if these products are not properly handled and preserved. The significant spoilage of the meat and the meat products occurs every year at different levels of the production chain including the preparation, the storage, and the distribution. Besides the lipid oxidation and the autolytic enzymatic spoilage, the microbial spoilage plays a significant role in this deterioration process leading to a substantial economic and environmental impact.
Introduction
The microorganisms associated with the spoilage of the meat and the meat products including bacteria such as the Pseudomonas, the Acinetobacter, the Brochothrix thermosphacta, the Lactobacillus spp., the Enterobacter, etc., and the yeast and the mold cause the quality defects such as of flavor, off-odor, etc. Additionally, the foodborne diseases have emerged as important and growing public health and economic problems in many countries over the last few decades [1, 2, 3, 4, 5, 6]. The foodborne diseases are not limited to a particular age group or the country. The foodborne diseases occur each year resulting in the illnesses, with hospitalizations and deaths, leading to high medical costs and productivity losses. In regarding to the meat and the meat products, several pathogenic microorganisms including the Salmonella spp., the Campylobacter jejuni, the Escherichia coli O157:H7, the Listeria monocytogenes, the Clostridium spp. and the Aeromonas hydrophila can result in the foodborne illnesses to the consumers if the products are not preserved and handled properly [7, 8, 9, 10, 11, 12].
The vegetative cells of the microbes are destroyed with the thermal processing, but not the spores of the food pathogens such as the Bacillus spp. and Clostridium spp. They can survive and need much harsher conditions to be inactivated.
With the absence of the competitive microflora, these spores can germinate and grow under favorable conditions caused by mishandling of the heat-treated products. Hence, it is vital to apply other hurdles such as low-temperature storage to avoid this problem [13, 14, 15, 16, 17, 18, 19]. To extend the period of the refrigerated storage, which is the most common method used for preserving the fresh meat and the meat products, many synthetic additives have been used over the years. The synthetic additives have been accused for some carcinogenic and toxic properties. This increased the consumer concerns towards the healthier meat and the meat products and the demand for the natural food additives over the years, which led researchers to examine the natural alternatives to the synthetic food additives [20, 21, 22, 23, 24, 25, 26].
The meat and the meat products are highly subject to the microbial deterioration, which ultimately leads to the safety and the quality issues if the meat are not properly handled and preserved. Several plant-derived Essential oils can be effectively used in the meat and the meat products as natural alternatives to the synthetic food additives, particularly as the effective antimicrobial agents [27, 28, 29, 30, 31, 32, 33]. The Phenolic compounds, such as the carvacrol, the eugenol, and the thymol, are mainly responsible for the antimicrobial activity of the Essential oils to increase the permeability of cell membranes and leading to loss of the cellular constituents. These natural additives should improve the meat quality without leaving residues in the product or the environment [34, 35, 36, 37, 38, 39, 40].
The Microbial Deterioration of the Meat and the Meat Products
Depending on the preservation method used, the growth and the metabolism of the spoilage and the pathogenic microorganisms can cause rapid spoilage of the meat and the meat products and the serious foodborne intoxications .The Bacteria are generally considered as the principle agents responsible for these deteriorations and the health issues in addition to the molds and yeasts presents the major genera of bacteria, yeasts, and molds found in meat and meat products [41, 42, 43, 44, 45, 46, 47, 48]. Main spoilage bacteria including the Pseudomonas, the Acinetobacter, the B. thermosphacta, the Moraxella, the Enterobacter, the Lactobacillus spp., the Leuconostoc spp., the Proteus spp. etc, the yeast and the mold, the decompose meat and the meat products and develop the unpleasant quality characteristics when they grow in large numbers in these perishable products [49, 50, 51, 52, 53, 54, 55, 56]. This can be attributed to the degradation of the proteins and the lipids present in the meat and the meat products resulting in the off-odors, the off-flavors, the discoloration, the texture defects, the slime and the gas productions, and the changes in pH. Although the spoilage microorganisms normally do not cause the illness, they can result in the gastrointestinal disturbances when consumed in the high concentrations [57, 58, 59, 60, 61, 62, 63, 64].
However, the rate of the meat spoilage is affected by several factors including the hygiene, the storage temperature, and the acidity of the meat and the meat products. The growth of the spoilage bacteria is favored at a pH range of 5.5-7.0. The Campylobacter jejuni, Salmonella serotype Typhimurium, Escherichia coli O157:H7, other Enterohemorrhagic E. coli (EHEC), Listeria monocytogenes, Arcobacter butzleri, Mycobacterium avium subspp. paratuberculosis and Aeromonas hydrophila are the most prevalent and serious emerging pathogens in the meat and the meat-derived products [65, 66, 67, 68, 69, 70, 71, 72]. The color, the odor, the taste or the texture of the meat and the meat products are not often changed by these pathogenic bacteria. Which are mainly responsible for the food poisoning and the food intoxications. The microbial deterioration of the meat and the meat products can be considered as one of the main limitations in the meat industry. The proper protective practices should be, therefore, applied for the meat and the meat products to produce the highest quality products possible [73, 74, 75, 76, 77, 78, 79].
The common preservation methods used against the microbial deterioration Due to the increasing demand for the precooked, the refrigerated, the ready-to-eat meat, and the meat products convenient for the modern and the busy lifestyles, the meat manufacturers must overcome many challenges, including the control of the microbial deterioration of these products [80, 81, 82, 83, 84, 85, 86, 87]. Several factors such as the microbial growth, the color, and the lipid oxidation affect the shelf life and the consumer acceptance of the fresh meat and the meat products. Therefore, to produce the safest and the highest quality products possible, these factors must be controlled [88, 89, 90, 91, 92, 93, 94, 95]. Several of the thermal and the non- thermal food preservation techniques have been used, alone or in combinations, to prevent or minimize the growth of spoilage and the pathogenic microorganisms in the meat and the meat products .The common physical and the chemical preservation techniques used to control the bacterial activity [96, 97, 98, 99, 100, 101, 102].
The Mode of Action of the Essential Oils
The antimicrobial activity of a given Essential oil can be attributed to its major constituents as well as their interaction with the minor constituents present in oils. However, the antimicrobial activity of the Essential oils has been consistently linked to phenolic constituents such as the carvacrol, the eugenol, and the thymol. The presence of the hydroxyl groups in the phenolic compounds is very vital for their antimicrobial activity [103, 104, 105, 106, 107, 108, 109].
The antimicrobial activity of the Essential oils is not attributable to one specific mechanism. Several locations or mechanisms in the microbial cells are supposed to be the sites of action for the Essential oil constituents. In brief, Essential oils can degrade the cell wall, disturb the phospholipid bilayer of the cytoplasmic membrane, and damage the membrane proteins leading to increased permeability of the cell membrane and loss of cellular constituents [110, 111, 112, 113, 114, 115, 116]. The Essential oils can further disrupt the proton motive force, electron flow, and active transport, and coagulate the cell contents .The Essential oils can impair a variety of enzyme systems including the enzymes involved in the energy regulation and synthesis of structural components and inactivate or destroy genetic material, strengthening their antimicrobial activities [117, 118, 119, 120, 121, 122].
Limitations and Future Perspectives
Although good antimicrobial activities were observed for many Essential oils, some limitations have 446 also been identified in the application of the Essential oils in the meat and the meat products. The interaction of some Essential oils with the food ingredients and structure may decrease their effectiveness [123, 124, 125, 126, 127, 128, 129]. The markedly reduced activity of the Essential oils may result in the food systems such as the meat and the meat products when compared to in vitro results. This may be attributed to the presence of fats, carbohydrates, proteins, and salts in such systems. For instance, the mint and the cilantro Essential oils were not effective against the L. monocytogenes in the products containing high levels of the fat, such as the pâté and a coating for the ham containing the canola oil [130, 131, 132, 133, 134, 135, 136].
It may be difficult to maintain the quality consistency because the composition of an individual Essential oil can vary due to several factors including the time of harvesting, variety, the part of the plant used, and method of extraction. The antimicrobial potency of the Essential oil constituents depends on pH, temperature, and level of microbial contamination [137, 138, 139, 140, 141, 142, 143]. Further, use of the Essential oils as the preservatives in the food has been limited as they are required in high concentrations in order to achieve the sufficient antimicrobial activity. The use of some Essential oils are mainly restricted to the spicy foods including the meat products that are associated with the herbs, spices, or seasonings since they affect the organoleptic quality of the food [144, 145, 146, 147, 148, 149, 150].
Conclusion
The application of the Essential oils is partially limited due to their intense aroma which may cause negative organoleptic effects. Novel technologies such as encapsulation of the Essential oils into the Nano emulsions and the use of the Essential oils as part of the hurdle technology (combined processes with MAP, nisin, EDTA, lysozyme etc.) to improve the microbial stability and the sensory quality of the meat and the meat products are being used in the meat industry; traditional methods of adding the Essential oils directly into the meat batter during manufacturing of the meat products.
Conflicts of Interest
The author declare no conflicts of interest regarding the publication of this paper.
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Saad SM, Shaltout FA, Elroos NAA, El-nahas SB (2019) Incidence of Staphylococci and E. coli in Meat and Some Meat Products. EC Nutrition 14(6).
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Shaltout FA, Riad EM, Ahmed TES, AbouElhassan A (2017) Studying the Effect of Gamma Irradiation on Bovine Offal’s Infected with Mycobacterium tuberculosis Bovine Type. Journal of Food Biotechnology Research 1(6): 1-5.
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Shaltout FA, Zakaria IM, Nabil ME (2018) Incidence of Some Anaerobic Bacteria Isolated from Chicken Meat Products with Special Reference to Clostridium perfringens. Nutrition and Food Toxicology 2(5): 429- 438.
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Shaltout FA, Mohamed, Hassan A, Hassanin FS (2004) Thermal Inactivation of Enterohaemorrhagic Escherichia Coli O157:H7 and Its Senstivity to Nisin and Lactic Acid Cultures. The First Scientific Conference, Moshtohor, Zagazig University Benha branch, Egypt.
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Shaltout FA, El-diasty EM, Elmesalamy M, Elshaer M (2014) Study on fungal contamination of some chicken meat products with special reference to 2 the use of PCR for its identification. Conference, Veterinary Medical Journal – Giza 60: 1-10.
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Shaltout FA (2002) Microbiological Aspects of Semi-cooked chicken Meat Products. Benha Veterinary Medical Journal 13(2): 15-26.
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Shaltout FA, Thabet MG, Koura HA (2017) Impact of some essential oils on the quality aspect and shelf life of meat. Benha Veterinary Medical Journal 33(2): 351-364.
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Shaltout FA, Farouk M, Ibrahim HAA, Afifi MEM (2017) Incidence of Coliform and Staphylococcus aureus in ready to eat fast foods. Benha Veterinary Medical Journal 32(1): 13-17.
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Shaltout FA, Zakaria IM, Nabil ME (2017) Detection and typing of Clostridium perfringens in some retail chicken meat products. Benha Veterinary Medical Journal 33(2): 283-291.
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Shaltout FA (1992) Studies on Mycotoxins in Meat and Meat by Products. M.V.Sc Thesis Faculty of Veterinary Medicine, Moshtohor, Zagazig University Benha branch.
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Shaltout FA (1996) Mycological and Mycotoxicological profile of Some Meat products. Ph.D.Thesis, Faculty of Veterinary Medicine, Moshtohor, Zagazig University Benha branch.
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Shaltout FA (1998) Proteolytic Psychrotrophes in Some Meat products. Alex Vet Med J 14(2): 97-107.
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Shaltout FA (1999) Anaerobic Bacteria in Vacuum Packed Meat Products. Benha Vet Med J 10(1)1-10.
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Shaltout FA (2000) Protozoal Foodborne Pathogens in some Meat Products. Assiut Vet Med J 42 (84): 54-59.
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Shaltout FA (2001) Quality evaluation of sheep carcasses slaughtered at Kalyobia abattoirs. Assiut Veterinary Medical Journal 46(91): 150-159.
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Shaltout FA (2002) Microbiological Aspects of Semi- cooked Chicken Meat Products. Benha Vet Med J 13(2): 15-26.
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Shaltout FA (2003) Yersinia Enterocolitica in some meat products and fish marketed at Benha city. The Third international conference Mansoura, pp: 29-30.
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Shaltout FA (2020) Microbiological quality of chicken carcasses at modern Poultry plant. Nutrition and Food Processing 3(1).
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Shaltout FA, Abdel Aziz AM (2004) Salmonella enterica Serovar Enteritidis in Poultry Meat and their Epidemiology. Vet Med J Giza 52(3): 429-436.
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Shaltout FA, Abdel Aziz AM (2004) Escherichia Coli Strains in Slaughtered Animals and Their Public Health Importence. J Egypt Vet Med Association 64(2): 7-21.
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Shaltout FA, Amin R, Nassif MZ, Shimaa A, Wahab A (2014) Detection of aflatoxins in some meat products. Benha veterinary medical journal 27(2): 368-374.
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Shaltout FA, Jehan A Riad EM, Elhasan A, Asmaa A (2012) Improvement of microbiological status of oriental sausage. Journal of Egyptian Veterinary Medical Association 72(2): 157-167.
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Shaltout FA, Daoud JR (1996) Chemical analytical studies on rabbit meat and liver. Benha Vet Med J 8(2): 17-27.
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Shaltout FA, Edris AM (1999) Contamination of shawerma with pathogenic yeasts. Assiut Veterinary Medical Journal 40(64): 34-39.
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Shaltout FA, Eldiasty E, Mohamed MS (2014) Incidence of lipolytic and proteolytic fungi in some chicken meat products and their public health significance. Animal Health Research Institute, pp: 79- 89.
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Shaltout FA, El-diasty EM, Salem RM, Asmaa MAH (2016) Mycological quality of chicken carcasses and extending shelf – life by using preservatives at refrigerated storage. Veterinary Medical Journal 62(3): 1-7.
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Shaltout FA, Salem R, Eldiasty E, Fatema D (2016) Mycological evaluation of some ready to eat meat products with special reference to molecular chacterization. Veterinary Medical Journal 62(3): 9-14.
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Shaltout FA, Elshater M, el-Aziz AMW (2015) Bacteriological assessment of street vended meat products sandwiches in Kalyobia Governorate. Benha Vet Med J 28(2): 58-66.
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Shaltout FA, Gerges MT, Shewail AA (2014) Impact of Organic Acids and Their Salts on Microbial Quality and Shelf Life of Beef meat. Assiut veterinary medical journal 1(2): 360-370.
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Shaltout FA, Ghoneim AM, Essmail ME, Yousseif A (2001) Studies on aflatoxin B1 residues in rabbits and their pathological effects. J Egypt Vet Med Association 61(2): 85-103.
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Shaltout FA, Hanan MT, Lawendy El (2003) Heavy Metal Residues In Shawerma. Beni-Suef Vet Med J 13(1): 213-224.
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Shaltout FA, Hashim MF (2002) Histamine in salted, Smoked and Canned Fish products. Benha Vet Med J 13 (1): 1-11.
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Shaltout FA, Hashim MF, Elnahas S (2015) Levels of some heavy metals in fish (tilapia nilotica and Claris lazera) at Menufia Governorate. Benha Vet Med J 29(1): 56-64.
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Shaltout FA, Ibrahim HM (1997) Quality evaluation of luncheon and Alexandrian sausage. Benha Vet Med J 10(1): 1-10.
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Shaltout FA, Nassif M, Shakran A (2014) Quality of battered and breaded chicken meat products. Global Journal of Agriculture and Food Safety Science 1(2): 283-299.
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Shaltout FA, Amani M, Salem AH, Mahmoud KA (2013) Bacterial aspect of cooked meat and offal at street vendors level. Benha veterinary medical journal 24(1): 320-328.
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Shaltout FA, Salem RM (2000) Moulds, aflatoxin B1 and Ochratoxin A in Frozen Livers and meat products. Vet Med J Giza 48(3): 341-346.
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Yasser H, Al-Tarazi A, Al-Zamil A, Shaltout FA, Abdel- Samei H (2002) Microbiological status of raw cow milk marketed in northern Jordan. AVMJ 49(96): 180-194.
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Shaltout FA, Zakaria IM, Nabil ME (2018) Incidence of Some Anaerobic Bacteria Isolated from Chicken Meat Products with Special Reference to Clostridium perfringens. Nutrition and Food Toxicology 2(5): 429- 438.
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Shaltout FA, El-diasty EM, Mohamed MS (2014) Incidence of lipolytic and proteolytic fungi in some chicken meat products and their public health significance. 1st Scientific conference of food safety and Technology, pp: 79-89.
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Shaltout FA, El-diasty EM, Salem RM, Asmaa MA, Hassan MT (2016) Mycological quality of chicken carcasses and extending shelf -life by using preservatives at refrigerated storage. Veterinary Medical Journal – Giza 62(3): 1-10.
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Shaltout FA, Salem RM, El-Diasty EM, Hassan WIM (2019) Effect of Lemon Fruits and Turmeric Extracts on Fungal Pathogens in Refrigerated Chicken Fillet Meat. Global Veterinaria 21(3): 156-160.
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Shaltout FA, El-diasty EM, Elmesalamy M, Elshaer M (2014) Study on fungal contamination of some chicken meat products with special reference to 2 the use of PCR for its identification. Conference, Veterinary Medical Journal – Giza 60: 1-10.
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Shaltout FA, Salem RM, El-diasty E, Fatema AH, Diab R (2016) Mycological evaluation of some ready to eat meat products with special reference to molecular characterization. Veterinary Medical Journal – Giza 62(3): 9-14.
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Shaltout FA, Ahmed AA, Maarouf E, Ahmed MK (2018) Heavy Metal Residues in chicken cuts up and processed chicken meat products. Benha veterinary medical journal 34(1): 473-483.
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Shaltout FA, Hanan M, Lamada E, Edris AM (2020) Bacteriological examination of some ready to eat meat and chicken meals. Biomed J Sci & Tech Res 38(2): 76-79.
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Sobhy A, Shaltout F (2020) Prevalence of some food poisoning bacteria in semi cooked chicken meat products at Qaliubiya governorate by recent Vitek 2 compact and PCR techniques. Benha Veterinary Medical Journal 38(2): 88-92.
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Shaltout FA, Riad EM, Abou E, Asmaa A (2017) prevalence Of Mycobacterium Tuberculosis In Imported cattle Offals And Its lymph Nodes. Veterinary Medical Journal -Giza (VMJG) 63(2): 115 - 122.
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Sobhy A, Shaltout F (2020) Detection of food poisoning bacteria in some semi-cooked chicken meat products marketed at Qaliubiya governorate. Benha Veterinary Medical Journal 38(2): 93-96.
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Shaltout FA (2024) Abattoir And Bovine Tuberculosis as A Reemerging Foodborne Diseas. Clinical Medical Reviews and Report 6(1): 1-7.
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Shaltout FA (2023) Viruses in Beef, Mutton, Chevon, Venison, Fish and Poultry Meat Products. Food Science & Nutrition Technology 8(4): 1-10.