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Yasir M, Al-Zahrani IA, Khan R, Soliman SA, Turkistani SA, Alawi M, Azhar EI. Microbiological risk assessment and resistome analysis from shotgun metagenomics of bovine colostrum microbiome. Saudi J Biol Sci 2024; 31:103957. [PMID: 38404539 PMCID: PMC10891335 DOI: 10.1016/j.sjbs.2024.103957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2023] [Revised: 02/05/2024] [Accepted: 02/10/2024] [Indexed: 02/27/2024] Open
Abstract
Colostrum is known for its nutraceutical qualities, probiotic attributes, and health benefits. The aim of this study was to profile colostrum microbiome from bovine in rural sites of a developing country. The focus was on microbiological safety assessments and antimicrobial resistance, taking into account the risks linked with the consumption of raw colostrum. Shotgun sequencing was employed to analyze microbiome in raw buffalo and cow colostrum. Alpha and beta diversity analyses revealed increased inter and intra-variability within colostrum samples' microbiome from both livestock species. The colostrum microbiome was mainly comprised of bacteria, with over 90% abundance, whereas fungi and viruses were found in minor abundance. Known probiotic species, such as Leuconostoc mesenteroides, Lactococcus lactis, Streptococcus thermophilus, and Lactobacillus paracasei, were found in the colostrum samples. A relatively higher number of pathogenic and opportunistic pathogenic bacteria were identified in colostrum from both animals, including clinically significant bacteria like Clostridium botulinum, Pseudomonas aeruginosa, Escherichia coli, and Listeria monocytogenes. Binning retrieved 11 high-quality metagenome-assembled genomes (MAGs), with three MAGs potentially representing novel species from the genera Psychrobacter and Pantoea. Notably, 175 antimicrobial resistance genes (ARGs) and variants were detected, with 55 of them common to both buffalo and cow colostrum metagenomes. These ARGs confer resistance against aminoglycoside, fluoroquinolone, tetracycline, sulfonamide, and peptide antibiotics. In conclusion, this study describes a thorough overview of microbial communities in buffalo and cow colostrum samples. It emphasizes the importance of hygienic processing and pasteurization in minimizing the potential transmission of harmful microorganisms linked to the consumption of colostrum.
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Affiliation(s)
- Muhammad Yasir
- Special Infectious Agents Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Department of Medical Laboratory Sciences, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Ibrahim A. Al-Zahrani
- Special Infectious Agents Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Department of Medical Laboratory Sciences, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Raees Khan
- Department of Biological Sciences, National University of Medical Sciences, Rawalpindi, Pakistan
| | | | - Safaa A. Turkistani
- Medical Laboratory Sciences, Fakeeh College for Medical Sciences, Jeddah 21134, Saudi Arabia
| | - Maha Alawi
- Department of Clinical Microbiology and Immunology, Faculty of Medicine, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Infection Control & Environmental Health Unit, King Abdulaziz University Hospital, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Esam I. Azhar
- Special Infectious Agents Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Department of Medical Laboratory Sciences, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah 21589, Saudi Arabia
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Temimi WKAAL, Kadhim MA, Khalaf AA. Partial purification of linoleic acid isomerase enzyme from Lactobacillus paracasei bacteria isolated from milk. BRAZ J BIOL 2024; 84:e258276. [DOI: 10.1590/1519-6984.258276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 12/03/2021] [Indexed: 11/22/2022] Open
Abstract
Abstract Conjugated Linoleic Acid (CLA) has attracted the attention of many researchers, especially that of microbial origin due to its biological importance to the consumer. The current study aims to extract LA Isomerase enzyme from Lactobacillus paracasei bacteria from milk and to use the enzyme in the production of CLA. Selective media, including MRS and MRS-Dagatose, were used in isolating local strains. The selected bacterial isolates were tested for their ability to produce LA-Isomerase enzyme. The isolate with high enzymatic activity was selected. After extraction and partial purification of the enzyme, the optimal conditions for the production of conjugated fatty acid were studied, and the reaction products were diagnosed using GC-MS technology. It was found that 11 isolates have the ability to produce CLA at different concentrations, H1 isolate showed the highest production of conjugated fatty acid at a concentration of 120.45 g.ml-1, this isolate was selected as the source for enzyme extraction. The enzymatic activity of the crude extract and partially purified with ammonium sulfate was estimated using color methods at wavelength of 233 nm. The effect of the optimum conditions (pH, temperature, linoleic acid concentration and enzyme concentration) on the CLA product was studied using the partially purified LA Isomerase enzyme, the optimum conditions for production were 6.5, 45 °C, 100 μg.ml-1 and 0.7 ml, respectively. The GC-MS technique showed the presence of a number of reaction products that are isomers of conjugated linoleic acid (C9T11, T9T12, T10C12) with different concentrations.
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Yang Y, Zhang R, Zhang F, Wang B, Liu Y. Storage stability of texture, organoleptic, and biological properties of goat milk yogurt fermented with probiotic bacteria. Front Nutr 2023; 9:1093654. [PMID: 36698458 PMCID: PMC9868595 DOI: 10.3389/fnut.2022.1093654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Accepted: 12/16/2022] [Indexed: 01/11/2023] Open
Abstract
Introduction Goat milk is an attractive food due to its high nutritional values, easy digestibility and hypoallergenicity, but has an undesirable "goaty" flavor. Methods In this study, goat yogurt was fermented with four probiotics, respectively, including Lactobacillus acidophilus (GYA), Bifidobacterium animalis (GYB), Lactobacillus casei (GYC) and Lactobacillus plantarum (GYP), and tested for texture, organoleptic, and biological properties during a 4-week storage period at the refrigerated temperature. Results All goat yogurt with probiotics showed an increase on titratable acidity and a corresponding downward trend on pH value. Viable counts of L. acidophilus and L. casei were above 6 log cfu/mL at the end of the storage, which met the minimum standards for viable probiotic bacteria in yogurt specified by the Food and Agriculture Organization of United Nation (FAO). The texture and organoleptic characteristics of fermented goat milk depended on the strain and the storage period. DPPH free radical scavenging rate and ferric reducing antioxidant power activity gradually increased in all goat yogurts during the storage and yogurt with probiotic bacteria showed higher values than those of GY0. Discussion Among all probiotic containing goat yogurts, GYC exhibited the desirable characteristics of hardness, adhesiveness, water holding capacity, antioxidant activity during the whole storage. Furthermore, the addition of L. casei effectively weakened the goaty flavor and enhanced the overall acceptability. Thus, fermented goat milk with L. casei is optional for the development of goat milk product with satisfactory texture properties, pleasant sensory quality and high bioactivity.
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Daneshazari R, Rabbani Khorasgani M, Hosseini-Abari A. Preliminary in vitro assessment of probiotic properties of Bacillus subtilis GM1, a spore forming bacteria isolated from goat milk. IRANIAN JOURNAL OF VETERINARY RESEARCH 2023; 24:65-73. [PMID: 37378382 PMCID: PMC10291520 DOI: 10.22099/ijvr.2023.43891.6441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 01/08/2023] [Accepted: 01/09/2023] [Indexed: 06/29/2023]
Abstract
Background Species of the Bacillus genus have a long history of use in biotechnology. Some Bacillus strains have recently been identified for food applications and industrial as safe bacteria, which mostly have been recognized as probiotic strains. Aims The primary purpose of the current study was to evaluate the probiotic characteristics of Bacillus subtilis strains isolated and identified from the goat milk samples. Methods After sampling from 40 goat milk and cultivation, suspected colonies were subjected to biochemical and molecular identification. Then, the confirmed isolate was assessed for in vitro probiotic tests, including hemolysis and lecithinase properties, bile salt, acid, and artificial gastric juice resistance, antioxidant activity, antibiotics susceptibility, enterotoxin genes detection, and attachment capacity to the HT-29 cells. Results Among 11 suspected isolates evaluated, only one isolate was identified as B. subtilis. In vitro tests for this strain showed similar results to other probiotic strains. The B. subtilis strain was susceptible to various antibiotics. The enterotoxin genes were not detected based on PCR assay. Concerning its probiotic characteristics assessment, especially tolerance to bile salts and acidic conditions, the Bacillus strain could have the potential to consider as a probiotic. Conclusion Goat milk can be recommended as a source of Bacillus isolates. Also, the isolated strain showed high adaptability to the gastrointestinal environment, relatively equal percentages of adhesion properties, and some safety aspects, having the potential to be considered as an appropriate probiotic.
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Affiliation(s)
- R Daneshazari
- Ph.D. Student in Microbiology, Department of Cell and Molecular Biology & Microbiology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan, Iran
| | - M Rabbani Khorasgani
- Department of Cell and Molecular Biology & Microbiology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan, Iran
| | - A Hosseini-Abari
- Department of Cell and Molecular Biology & Microbiology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan, Iran
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An updated and comprehensive review on the composition and preservation strategies of bovine colostrum and its contributions to animal health. Anim Feed Sci Technol 2022. [DOI: 10.1016/j.anifeedsci.2022.115379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Liu Y, Cai J, Zhang F. Functional comparison of breast milk, cow milk and goat milk based on changes in the intestinal flora of mice. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2021.111976] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Toquet M, Gómez-Martín Á, Bataller E. Review of the bacterial composition of healthy milk, mastitis milk and colostrum in small ruminants. Res Vet Sci 2021; 140:1-5. [PMID: 34358776 DOI: 10.1016/j.rvsc.2021.07.022] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 07/06/2021] [Accepted: 07/22/2021] [Indexed: 11/18/2022]
Abstract
Bacterial infections are the cause of many reproductive disorders of economic importance, such as mastitis, in livestock. Unfortunately, very little is known about the microbiota and the changes occurring during an infection state in small ruminants. The sequencing of regions of the 16S rRNA gene, is the useful tool to describe the whole dairy microbiome. Using this technique, studies have identified various phyla such as Firmicutes, Actinobacteria, Proteobacteria, Bacteroidetes, Fusobacteria and Cyanobacteria; and also several genera from raw milk of small ruminants. Nevertheless, there does not seem to be a consensus on the predominant genera nor phyla, even within the same breed. There is a lack of information about the mammary microflora in meat-oriented breeds, and about the microflora of colostrum and mastitis milk. Further studies comparing the microbiota between artificial and natural lactations and between healthy and mastitis milk are necessary. Considering the concerns arising from the use overuse of antibiotic therapy in Veterinary Medicine, it would be interesting to develop alternative strategies for the control of mastitis. Probiotics, such as lactic acid bacteria (LAB), have proven to be an interesting antibiotic-free strategy. Therefore, their presence in the dairy microflora of small ruminants and their interactions with other bacteria, such as mastitis-causing pathogens, should be scrutinized, given that the efficacy of probiotics increase when the bacterial strains used are specific to their host.
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Affiliation(s)
- Marion Toquet
- Grupo de investigación Agentes Microbiológicos Asociados a la Reproduccion (ProVaginBIO), Departamento Producción y Sanidad Animal, Salud Pública Veterinaria y Ciencia y Tecnología de los Alimentos, Facultad de Veterinaria, Universidad Cardenal Herrera-CEU, CEU Universities, Valencia, Spain
| | - Ángel Gómez-Martín
- Grupo de investigación Agentes Microbiológicos Asociados a la Reproduccion (ProVaginBIO), Departamento Producción y Sanidad Animal, Salud Pública Veterinaria y Ciencia y Tecnología de los Alimentos, Facultad de Veterinaria, Universidad Cardenal Herrera-CEU, CEU Universities, Valencia, Spain
| | - Esther Bataller
- Grupo de investigación Agentes Microbiológicos Asociados a la Reproduccion (ProVaginBIO), Departamento Producción y Sanidad Animal, Salud Pública Veterinaria y Ciencia y Tecnología de los Alimentos, Facultad de Veterinaria, Universidad Cardenal Herrera-CEU, CEU Universities, Valencia, Spain.
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