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Abdel-Raheem SM, Abd El-Hamid MI, Ibrahim D, El-Malt RMS, El-Ghareeb WR, Ismail HA, Al-Sultan SI, Meligy AMA, ELTarabili RM. Future scope of plant-derived bioactive compounds in the management of methicillin-resistant Staphylococcus aureus: In vitro antimicrobial and antivirulence prospects to combat MRSA. Microb Pathog 2023; 183:106301. [PMID: 37579824 DOI: 10.1016/j.micpath.2023.106301] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 08/08/2023] [Accepted: 08/09/2023] [Indexed: 08/16/2023]
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) is a foremost human and animal pathogen with public health and veterinary significance causing hospital and community infections and contagious bovine mastitis. Due to its ability to develop multidrug resistance (MDR) and its pathogenicity, MRSA infection control is becoming a global concern. Natural antibacterial options are needed to combat MDR development and infectious dissemination. This study investigated the antimicrobial resistance and virulence genes profiling of MRSA isolates and explored the antivirulence efficacy of trans-cinnamaldehyde, thymol, and carvacrol essential oils (EOs) against multivirulent and MDR-MRSA isolates. Thirty six S. aureus isolates (25%) were retrieved, of which 34 (94.4%) were MRSA. A high prevalence of MDR (66.7%) was monitored and all 53 molecularly verified isolates possessed icaA and cna virulence genes. Moreover, 94.1% of these isolates were multivirulent with 23.5% of them carrying icaA, cna, eta, tst, and sea virulence genes. Our data proved superior in vitro antimicrobial and antivirulence activities of trans-cinnamaldehyde, thymol, and carvacrol. They inhibited the growth of multi-virulent and MDR-MRSA isolates and downregulated the transcription of examined virulence genes. Our study suggests using EOs as prospective antimicrobials with excellent antivirulence activities against MRSA isolates. We provided data regarding the eventual role of phytogenics in prevention and control of MRSA infection.
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Affiliation(s)
- Sherief M Abdel-Raheem
- Department of Public Health, College of Veterinary Medicine, King Faisal University, P.O. Box 400, Hofuf, 31982, Al-Ahsa, Saudi Arabia; Department of Animal Nutrition and Clinical Nutrition, Faculty of Veterinary Medicine, Assiut University, Assiut, 71526, Egypt.
| | - Marwa I Abd El-Hamid
- Department of Microbiology, Faculty of Veterinary Medicine, Zagazig University, 44519, Zagazig, Egypt.
| | - Doaa Ibrahim
- Department of Nutrition and Clinical Nutrition, Faculty of Veterinary Medicine, Zagazig University, Zagazig, 44511, Egypt.
| | - Rania M S El-Malt
- Department of Bacteriology, Animal Health Research Institute, Zagazig Branch, Agriculture Research Center, 44516, Zagazig, Egypt.
| | - Waleed Rizk El-Ghareeb
- Department of Public Health, College of Veterinary Medicine, King Faisal University, P.O. Box 400, Hofuf, 31982, Al-Ahsa, Saudi Arabia; Food Control Department, Faculty of Veterinary Medicine, Zagazig University, Zagazig, 44519, Egypt.
| | - Hesham A Ismail
- Department of Public Health, College of Veterinary Medicine, King Faisal University, P.O. Box 400, Hofuf, 31982, Al-Ahsa, Saudi Arabia; Food Hygiene Department, Faculty of Veterinary Medicine, Assiut University, Assiut, 71526, Egypt.
| | - Saad Ibrahim Al-Sultan
- Department of Public Health, College of Veterinary Medicine, King Faisal University, P.O. Box 400, Hofuf, 31982, Al-Ahsa, Saudi Arabia
| | - Ahmed M A Meligy
- Department of Clinical Sciences, Central Lab, College of Veterinary Medicine, King Faisal University, P.O. Box 400, Hofuf, 31982, Al-Ahsa, Saudi Arabia; Department of Physiology, Agricultural Research Center (ARC), Giza, Egypt.
| | - Reham M ELTarabili
- Department of Bacteriology, Immunology, and Mycology, Faculty of Veterinary Medicine, Suez Canal University, Ismailia, 41522, Egypt.
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Zhang M, Li H, Agyekumwaa AK, Yu Y, Xiao X. Effects of citronellal on growth and enterotoxins production in Staphylococcus aureus ATCC 29213. Toxicon 2022; 213:92-98. [PMID: 35489426 DOI: 10.1016/j.toxicon.2022.04.016] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 04/21/2022] [Accepted: 04/23/2022] [Indexed: 12/13/2022]
Abstract
Staphylococcus aureus (S. aureus) is known to be one of the most common foodborne pathogens capable of secreting a wide range of exotoxins such as enterotoxin, which severely threatens the health of consumers. Over the past few years, the development of safe and effective strategies in inhibiting the growth and enterotoxins generation of S. aureus in food turns out to be the research focus and emphasis. This research explores citronellal (CIT), a native compound with extensive existence in spices, which could effectively inhibit the growth and enterotoxins generation of S. aureus (ATCC 29213). Results from minimal inhibitory concentration (MIC), minimum bactericidal concentration (MBC), and time-kill curves, showed that CIT could tremendously inhibit the growth of S. aureus. Analysis on hemolysin showed that CIT at sub-MIC could significantly (p < 0.05) inhibit the hemolytic activity of S. aureus. As revealed by the results of ELISA, the production of enterotoxins in the culture supernatant and pork meat decreased significantly (p < 0.05) after exposure to CIT at sub-MIC. Furthermore, a significant (p < 0.05) decrease in dose-dependent was found in the transcription levels of virulence-related genes. In all, CIT proved to be a possible inhibitor of the growth and enterotoxins production of S. aureus with highly promising application in the food industry.
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Affiliation(s)
- Mao Zhang
- Research Center of Food Safety and Detection, College of Food Science and Engineering, South China University of Technology, Guangzhou, 510006, PR China
| | - Hui Li
- Research Center of Food Safety and Detection, College of Food Science and Engineering, South China University of Technology, Guangzhou, 510006, PR China
| | - Addo Keren Agyekumwaa
- Research Center of Food Safety and Detection, College of Food Science and Engineering, South China University of Technology, Guangzhou, 510006, PR China
| | - Yigang Yu
- Research Center of Food Safety and Detection, College of Food Science and Engineering, South China University of Technology, Guangzhou, 510006, PR China.
| | - Xinglong Xiao
- Research Center of Food Safety and Detection, College of Food Science and Engineering, South China University of Technology, Guangzhou, 510006, PR China.
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Citral modulates virulence factors in methicillin-resistant Staphylococcus aureus. Sci Rep 2021; 11:16482. [PMID: 34389776 PMCID: PMC8363631 DOI: 10.1038/s41598-021-95971-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Accepted: 07/27/2021] [Indexed: 11/17/2022] Open
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) is responsible for high morbidity and mortality rates. Citral has been studied in the pharmaceutical industry and has shown antimicrobial activity. This study aimed to analyze the antimicrobial activity of citral in inhibiting biofilm formation and modulating virulence genes, with the ultimate goal of finding a strategy for treating infections caused by MRSA strains. Citral showed antimicrobial activity against MRSA isolates with minimum inhibitory concentration (MIC) values between 5 mg/mL (0.5%) and 40 mg/mL (4%), and minimum bactericidal concentration (MBC) values between 10 mg/mL (1%) and 40 mg/mL (4%). The sub-inhibitory dose was 2.5 mg/mL (0.25%). Citral, in an antibiogram, modulated synergistically, antagonistically, or indifferent to the different antibiotics tested. Prior to evaluating the antibiofilm effects of citral, we classified the bacteria according to their biofilm production capacity. Citral showed greater efficacy in the initial stage, and there was a significant reduction in biofilm formation compared to the mature biofilm. qPCR was used to assess the modulation of virulence factor genes, and icaA underexpression was observed in isolates 20 and 48. For icaD, seg, and sei, an increase was observed in the expression of ATCC 33,591. No significant differences were found for eta and etb. Citral could be used as a supplement to conventional antibiotics for MRSA infections.
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Erfan AM, Marouf S. Cinnamon oil downregulates virulence genes of poultry respiratory bacterial agents and revealed significant bacterial inhibition: An in vitro perspective. Vet World 2019; 12:1707-1715. [PMID: 32009749 PMCID: PMC6925043 DOI: 10.14202/vetworld.2019.1707-1715] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Accepted: 09/30/2019] [Indexed: 11/16/2022] Open
Abstract
Background and Aim: Respiratory bacterial agents represent one of the most harmful factors that ordinarily threaten the poultry industry and usually lead to great economic losses. Meanwhile, there is a global demand to avoid the highly emerging antibiotic resistance and antibiotic residues in edible meat. Whereas, the use of alternatives became of great priority, especially for those substances extracted from natural plant origin. The study aimed to evaluate the antibacterial effect of cinnamon oil as a herbal extract on different respiratory bacterial agents. Materials and Methods: One hundred and fifty biological samples were collected through targeted surveillance for respiratory diseased poultry farms representing three governorates, from which bacterial isolation and identification, DNA sequencing of representative strains were performed. Furtherly, phenotypic and genotypic evaluation of the antibacterial effect of cinnamon oil was performed by minimum inhibitory concentration, agar disk diffusion, and virulence genes expression real-time polymerase chain reaction. Results: Cinnamon oil gave rise to acceptable degrees of virulence genes downregulation of 0.15, 0.19, 0.37, 0.41, 0.77, and 0.85 for Staphylococcus aureus sed gene, Escherichia coli stx1 gene, Avibacterium paragallinarum HPG-2 gene, Pasteurella multocida ptfA gene, Mycoplasma gallisepticum Mgc2 gene, and Ornithobacterium rhinotracheale adk gene, respectively. Phenotypically, using agar disk diffusion assay and broth microdilution susceptibility, cinnamon oil showed also tolerable results as it stopped the growth of S. aureus, E. coli, P. multocida, and A. paragallinarum with varying zones of inhibition. Conclusion: The encountered results declared the successful in vitro effect of cinnamon oil that recommends its application for living birds for future use as a safe antibacterial in the poultry industry.
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Affiliation(s)
- Ahmed Mohammed Erfan
- National Laboratory for Veterinary Quality Control on Poultry Production, Animal Health Research Institute, Dokki, Giza, 12618, Egypt
| | - Sherif Marouf
- Department of Microbiology, Faculty of Veterinary Medicine, Cairo University, Giza, 12211, Egypt
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Song X, Sun Y, Zhang Q, Yang X, Zheng F, He S, Wang Y. Failure of Staphylococcus aureus to Acquire Direct and Cross Tolerance after Habituation to Cinnamon Essential Oil. Microorganisms 2019; 7:E18. [PMID: 30641977 PMCID: PMC6352263 DOI: 10.3390/microorganisms7010018] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 01/06/2019] [Accepted: 01/08/2019] [Indexed: 11/16/2022] Open
Abstract
Utilization of sublethal concentrations of cinnamon essential oil (CEO) for food preservation has been proposed. However, exposure to stressful, sublethal growth conditions may induce bacterial tolerance to homologous or heterologous stressing agents. Hence, the ability of CEO to stimulate bacterial stress response was evaluated in the current work. Staphylococcus aureus was exposed to 1/4 and 1/2 of the minimum inhibitory concentration (MIC, 500 μL/L) of CEO for 18 h. It was found that overnight habituation to CEO failed to induce direct tolerance and cross-tolerance to lactic acid (pH 4.5), NaCl (10 g/100 mL) and high temperature (45 °C) in S. aureus. Likewise, S. aureus cells subjected to successive habituation with increasing amounts (1/16 MIC to 2× MIC) of CEO developed no direct tolerance. Taken together, CEO has no inductive effect on the acquisition of stress tolerance in S. aureus.
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Affiliation(s)
- Xiaoqiu Song
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Haiquan Road 100, Shanghai 201418, China.
| | - Yue Sun
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Haiquan Road 100, Shanghai 201418, China.
| | - Qian Zhang
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Haiquan Road 100, Shanghai 201418, China.
| | - Xiaobo Yang
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Haiquan Road 100, Shanghai 201418, China.
| | - Feng Zheng
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Haiquan Road 100, Shanghai 201418, China.
| | - Shoukui He
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Haiquan Road 100, Shanghai 201418, China.
| | - Yifei Wang
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Haiquan Road 100, Shanghai 201418, China.
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