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Huang A, Dong X, Shen G, He L, Cai C, Liu Q, Niu Q, Xu C. Target Recognition-Triggered Interfacial Electron Transfer Model: Toward Signal-On Photoelectrochemical Aptasensing for Efficient Detection of Staphylococcus aureus Using Ti 3C 2T x-Au NBPs/ZnO NR Composites. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:20526-20536. [PMID: 39302020 DOI: 10.1021/acs.langmuir.4c02104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/22/2024]
Abstract
Staphylococcus aureus (S. aureus) is one of the most common foodborne pathogens worldwide, which poses a great threat to public health. It is of utmost importance to develop rapid, simple, and sensitive methods for the determination of S. aureus. A signal-on photoelectrochemical (PEC) aptasensor is constructed herein based on titanium carbide (Ti3C2Tx)-Au nanobipyramids (NBPs)/ZnO nanoarrays (NRs). The reliability and capability of the PEC aptasensor make it suitable for the sensitive and selective determination of S. aureus. First, the electrostatically self-assembled Ti3C2Tx-Au NBP nanomaterial was coated on the ZnO NR surface by a spin-coating method. On the one hand, Ti3C2Tx-Au NBPs can broaden the spectral absorption of ZnO NRs, resulting in Ti3C2Tx-Au NBPs/ZnO NR composites that exhibit a wide range of absorption from the ultraviolet to the infrared region. On the other hand, Ti3C2Tx can reduce the agglomeration of nanoparticles, while Au NBPs can effectively fix the aptamer through the Au-S bond. Specifically, the experimental results show that when S. aureus is present, the Au NBPs-aptamer-S. aureus complex is shed from the electrode surface, altering the interfacial electron transfer model and reducing the steric hindrance. Consequently, an amplified photocurrent signal for the quantitative determination of S. aureus is obtained. Under optimal experimental conditions, a linear correlation is observed between the current response of the aptasensor and the logarithm of the S. aureus concentration (ranging from 1.0 to 1.0 × 106 CFU/mL), with an impressive detection limit as low as 0.5 CFU/mL. Furthermore, the aptasensor has been successfully employed for the detection of S. aureus in milk, with the recovery of 93.0%-99.0%. Hence, this research offers a novel approach for the detection of foodborne pathogens and other noxious substances.
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Affiliation(s)
- Ao Huang
- Key Laboratory of Modern Agricultural Equipment and Technology (Jiangsu University), Ministry of Education, School of Agricultural Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
| | - Xiuxiu Dong
- Key Laboratory of Modern Agricultural Equipment and Technology (Jiangsu University), Ministry of Education, School of Agricultural Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
| | - Guanghui Shen
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu 210014, China
| | - Lilong He
- Key Laboratory of Modern Agricultural Equipment and Technology (Jiangsu University), Ministry of Education, School of Agricultural Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
| | - Chaoyang Cai
- Key Laboratory of Modern Agricultural Equipment and Technology (Jiangsu University), Ministry of Education, School of Agricultural Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
| | - Qian Liu
- Key Laboratory of Modern Agricultural Equipment and Technology (Jiangsu University), Ministry of Education, School of Agricultural Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
| | - Qijian Niu
- Key Laboratory of Modern Agricultural Equipment and Technology (Jiangsu University), Ministry of Education, School of Agricultural Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
| | - Chunxiang Xu
- School of Electronic Science & Engineering, Southeast University, Nanjing, Jiangsu 210096, China
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Aleksic B, Udovicki B, Kovacevic J, Miloradovic Z, Djekic I, Miocinovic J, Tomic N, Smigic N. Microbiological Assessment of Dairy Products Produced by Small-Scale Dairy Producers in Serbia. Foods 2024; 13:1456. [PMID: 38790756 PMCID: PMC11119881 DOI: 10.3390/foods13101456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2024] [Revised: 04/29/2024] [Accepted: 05/07/2024] [Indexed: 05/26/2024] Open
Abstract
The microbiological quality of dairy products from small-scale producers in Serbia was analysed. A total of 302 dairy products [raw (n = 111) and pasteurized milk cheeses (n = 79) and kajmak (n = 112)], were collected and tested for the presence of pathogens, Listeria monocytogenes and Salmonella spp., and enumerated for Coagulase-positive staphylococci (CPS), Escherichia coli, and yeasts and moulds. None of the samples tested positive for Salmonella spp., while L. monocytogenes was recovered from one raw milk cheese and five kajmak samples. Raw milk cheese and kajmak also had higher levels of indicator microorganisms, namely E. coli and yeast and moulds. Molecular serotyping grouped L. monocytogenes isolates into serogroups 1 (1/2a and 3a) and 3 (1/2b, 3b, and 7). When exposed to eight antibiotics, L. monocytogenes isolates were mostly sensitive, with the exception of oxacillin and reduced susceptibility to clindamycin, penicillin G, and trimethoprim/sulfamethoxazole, emphasizing the importance of continuous surveillance for antimicrobial resistance. Samples that tested positive for Listeria spp. also had higher loads of indicator microorganisms, namely E. coli and yeast and moulds, suggesting lapses in hygiene practices during production. Collectively, these data emphasize the need for improved food safety and hygiene practices among small-scale dairy producers. This is crucial to reduce the microbial contamination and improve both the quality and safety of dairy products in the Serbian market.
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Affiliation(s)
- Biljana Aleksic
- Department of Food Safety and Quality Management, Faculty of Agriculture, University of Belgrade, Nemanjina 6, 11080 Belgrade, Serbia; (B.A.); (B.U.); (I.D.); (N.T.)
- Dairy Institute, Smolucska 11, 11070 Belgrade, Serbia
| | - Bozidar Udovicki
- Department of Food Safety and Quality Management, Faculty of Agriculture, University of Belgrade, Nemanjina 6, 11080 Belgrade, Serbia; (B.A.); (B.U.); (I.D.); (N.T.)
| | - Jovana Kovacevic
- Food Innovation Center, Oregon State University, 1207 NW Naito Parkway, Portland, OR 97209, USA;
| | - Zorana Miloradovic
- Department of Animal Source Food Technology, Faculty of Agriculture, University of Belgrade, Nemanjina 6, 11080 Belgrade, Serbia; (Z.M.); (J.M.)
| | - Ilija Djekic
- Department of Food Safety and Quality Management, Faculty of Agriculture, University of Belgrade, Nemanjina 6, 11080 Belgrade, Serbia; (B.A.); (B.U.); (I.D.); (N.T.)
| | - Jelena Miocinovic
- Department of Animal Source Food Technology, Faculty of Agriculture, University of Belgrade, Nemanjina 6, 11080 Belgrade, Serbia; (Z.M.); (J.M.)
| | - Nikola Tomic
- Department of Food Safety and Quality Management, Faculty of Agriculture, University of Belgrade, Nemanjina 6, 11080 Belgrade, Serbia; (B.A.); (B.U.); (I.D.); (N.T.)
| | - Nada Smigic
- Department of Food Safety and Quality Management, Faculty of Agriculture, University of Belgrade, Nemanjina 6, 11080 Belgrade, Serbia; (B.A.); (B.U.); (I.D.); (N.T.)
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Deddefo A, Mamo G, Asfaw M, Edao A, Hiko A, Fufa D, Jafer M, Sombo M, Amenu K. Occurrence, antimicrobial susceptibility, and resistance genes of Staphylococcus aureus in milk and milk products in the Arsi highlands of Ethiopia. BMC Microbiol 2024; 24:127. [PMID: 38627609 PMCID: PMC11020821 DOI: 10.1186/s12866-024-03288-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 04/02/2024] [Indexed: 04/19/2024] Open
Abstract
BACKGROUND In Ethiopia, milk production and handling practices often lack proper hygiene measures, leading to the potential contamination of milk and milk products with Staphylococcus aureus (S. aureus), including methicillin-resistant strains, posing significant public health concerns. This study aimed to investigate the occurrence, antimicrobial susceptibility profiles and presence of resistance genes in S. aureus strains isolated from milk and milk products. METHODS A cross-sectional study was conducted in the Arsi highlands, Oromia, Ethiopia from March 2022 to February 2023. A total of 503 milk and milk product samples were collected, comprising 259 raw milk, 219 cottage cheese, and 25 traditional yogurt samples. S. aureus isolation and coagulase-positive staphylococci enumeration were performed using Baird-Parker agar supplemented with tellurite and egg yolk. S. aureus was further characterized based on colony morphology, Gram stain, mannitol fermentation, catalase test, and coagulase test. Phenotypic antimicrobial resistance was assessed using the Kirby-Bauer disc diffusion method, while the polymerase chain reaction (PCR) was employed for confirming the presence of S. aureus and detecting antimicrobial resistance genes. RESULTS S. aureus was detected in 24.9% of the milk and milk products, with the highest occurrence in raw milk (40.9%), followed by yogurt (20%), and cottage cheese (6.4%). The geometric mean for coagulase-positive staphylococci counts in raw milk, yogurt, and cottage cheese was 4.6, 3.8, and 3.2 log10 CFU/mL, respectively. Antimicrobial resistance analysis revealed high levels of resistance to ampicillin (89.7%) and penicillin G (87.2%), with 71.8% of the isolates demonstrating multidrug resistance. Of the 16 S. aureus isolates analyzed using PCR, all were found to carry the nuc gene, with the mecA and blaZ genes detected in 50% of these isolates each. CONCLUSION This study revealed the widespread distribution of S. aureus in milk and milk products in the Arsi highlands of Ethiopia. The isolates displayed high resistance to ampicillin and penicillin, with a concerning level of multidrug resistance. The detection of the mecA and blaZ genes in selected isolates is of particular concern, highlighting a potential public health hazard and posing a challenge to effective antimicrobial treatment. These findings highlight the urgent need to enhance hygiene standards in milk and milk product handling and promote the rational use of antimicrobial drugs. Provision of adequate training for all individuals involved in the dairy sector can help minimize contamination. These measures are crucial in addressing the threats posed by S. aureus, including methicillin-resistant strains, and ensuring the safety of milk and its products for consumers.
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Affiliation(s)
- Abiot Deddefo
- College of Agriculture and Environmental Sciences, Arsi University, P.O. Box 193, Asella, Ethiopia.
- College of Veterinary Medicine and Agriculture, Addis Ababa University, P.O. Box 34, Bishoftu, Ethiopia.
| | - Gezahegne Mamo
- College of Veterinary Medicine and Agriculture, Addis Ababa University, P.O. Box 34, Bishoftu, Ethiopia
| | - Minda Asfaw
- College of Agriculture and Environmental Sciences, Arsi University, P.O. Box 193, Asella, Ethiopia
| | - Adem Edao
- College of Veterinary Medicine, Haramaya University, P.O. Box 138, Haramaya, Ethiopia
| | - Adem Hiko
- College of Veterinary Medicine, Haramaya University, P.O. Box 138, Haramaya, Ethiopia
| | - Dereje Fufa
- Asella Regional Veterinary Laboratory, P.O. Box 212, Asella, Ethiopia
| | - Mohammed Jafer
- College of Veterinary Medicine, Haramaya University, P.O. Box 138, Haramaya, Ethiopia
| | - Melaku Sombo
- National Animal Health Institute, P.O. Box 04, Sebeta, Ethiopia
| | - Kebede Amenu
- College of Veterinary Medicine and Agriculture, Addis Ababa University, P.O. Box 34, Bishoftu, Ethiopia
- Animal and Human Health Programme, International Livestock Research Institute (ILRI), P.O. Box 5689, Addis Ababa, Ethiopia
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Kassa HY, Belete MA, Yihunie FB, Bayu A, Demlie TB, Tassew H. Occurrence of Methicillin-Resistant Staphylococcus aureus (MRSA) in Bovine Bulk Milk and Farm Workers in Smallholder Dairy Farming Systems in Northwestern Ethiopia. VETERINARY MEDICINE (AUCKLAND, N.Z.) 2024; 15:71-80. [PMID: 38496263 PMCID: PMC10942014 DOI: 10.2147/vmrr.s454193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Accepted: 03/04/2024] [Indexed: 03/19/2024]
Abstract
Background and Purpose Staphylococcus aureus is a common pathogen responsible for causing various human and animal infections and is well known for its ability to develop resistance to multiple antibiotics. This study aimed to evaluate the occurrence of methicillin-resistant Staphylococcus aureus (MRSA) in bulk milk and dairy farms in northwestern Ethiopia and to determine their phenotypic and genotypic antimicrobial susceptibility patterns. Methods We collected 50 bulk milk samples from 50 dairy farms and 50 hand swabs from dairy milkers. The cefoxitin disk diffusion test and PCR-based assays were used to identify MRSA isolates. In addition, cefoxitin-resistant isolates were tested for susceptibility to other antibiotics using the Kirby-Bauer disk diffusion method. Results The results showed that MRSA was detected in 8 samples: 6 from bulk milk samples (12%) and 2 from hand swabs (4%). All MRSA isolates exhibited a high resistance rate to penicillin (100%), followed by tetracycline (75%), ciprofloxacin (25%), chloramphenicol (25%), erythromycin (25%), gentamycin (12.5%), and trimethoprim-sulfamethoxazole (12.5%). Moreover, 72% of the isolates showed resistance to three or more antibiotic classes and were classified as multidrug-resistant. Conclusion This study identified methicillin-resistant Staphylococcus aureus and multidrug-resistant MRSA in bulk milk and dairy farms in northwestern Ethiopia. These findings highlight the potential risk of transmission of these antibiotic-resistant bacteria to humans and the need for improved antibiotic stewardship in the dairy sector using the One Health approach.
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Affiliation(s)
- Haregua Yesigat Kassa
- Department of Veterinary Laboratory Technology, College of Agriculture and Natural Resource, Debre Markos University, Debre Markos, Ethiopia
| | - Mequanint Addisu Belete
- Department of Veterinary Laboratory Technology, College of Agriculture and Natural Resource, Debre Markos University, Debre Markos, Ethiopia
| | | | - Azeb Bayu
- Department of Veterinary Science, College of Agriculture and Environmental Science, Debre Tabor University, Debre Tabor, Ethiopia
| | - Tiliksew Bialfew Demlie
- Department of Veterinary Science, College of Agriculture and Environmental Sciences, Bahir Dar University, Bahir Dar, Ethiopia
| | - Habtamu Tassew
- Department of Veterinary Science, College of Agriculture and Environmental Sciences, Bahir Dar University, Bahir Dar, Ethiopia
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Chakrawarti A, Casey CL, Burk A, Mugabi R, Ochoa A, Barlow JW. An observational study demonstrates human-adapted Staphylococcus aureus strains have a higher frequency of antibiotic resistance compared to cattle-adapted strains isolated from dairy farms making farmstead cheese. BMC Vet Res 2024; 20:75. [PMID: 38409123 PMCID: PMC10898128 DOI: 10.1186/s12917-024-03910-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Accepted: 02/04/2024] [Indexed: 02/28/2024] Open
Abstract
BACKGROUND Staphylococcus aureus is a multi-host zoonotic pathogen causing human and livestock diseases. Dairy farms that make artisan cheese have distinctive concerns for S. aureus control. Antimicrobial-resistant (AMR) S. aureus is a public and animal health concern. There is a need to study the population structure of AMR S. aureus at the human-animal interface and understand the path of zoonotic transmission. This cross-sectional observational study aimed to assess the genetic diversity and AMR patterns of S. aureus isolated from cattle and humans on conventional and organic Vermont dairy farms that produce and sell farmstead cheese. RESULTS A convenience sample of 19 dairy farms in Vermont was enrolled, and 160 S. aureus isolates were collected from cow quarter milk (CQM), bulk tank milk (BTM), human-hand and -nasal swabs. After deduplication, 89 isolates were used for the analysis. Sequence types (STs) were determined by multilocus sequence typing and cataloged to the PubMLST database. Nine defined and five novel STs were identified. For BTM and CQM samples, six STs were identified within cow-adapted CC97 and CC151. Two human-adapted STs were isolated from BTM and CQM. Seven human-adapted clonal complexes with eight STs were identified from human samples. One cow-adapted ST was isolated from a human. Antimicrobial susceptibility of the isolates was tested using disc diffusion and broth microdilution methods. Approximately 27% of the isolates were beta-lactam resistant and blaZ gene-positive. S. aureus isolates from human swabs were more likely to carry blaZ compared to isolates from CQM or BTM. S. aureus isolated from cows and humans on the same farm belonged to different STs. CONCLUSION Humans were more likely to carry beta-lactam-resistant S. aureus compared to cows, and on organic farms only human-adapted blaZ positive STs were isolated from BTM. Moreover, we identified potential spillover events of S. aureus sequence types between host species. The presence of penicillin-resistant-human-adapted S. aureus on both organic and conventional dairy farms highlights a "One Health" concern at the junction of public and animal health requiring further surveillance.
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Affiliation(s)
- Ashma Chakrawarti
- Department of Animal and Veterinary Sciences, University of Vermont, Burlington, VT, USA
| | - Christine L Casey
- Kentucky Department of Fish and Wildlife Resources, Frankfort, KY, USA
| | - Ariela Burk
- Department of Pathobiological Sciences, University of Wisconsin-Madison, Madison, WI, USA
| | - Robert Mugabi
- Department of Veterinary Diagnostic & Production Animal Medicine, Iowa State University, Ames, IA, USA
| | | | - John W Barlow
- Department of Animal and Veterinary Sciences, University of Vermont, Burlington, VT, USA.
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Crippen TL, Kim D, Poole TL, Swiger SL, Anderson RC. The bacterial and archaeal communities of flies, manure, lagoons, and troughs at a working dairy. Front Microbiol 2024; 14:1327841. [PMID: 38449879 PMCID: PMC10915237 DOI: 10.3389/fmicb.2023.1327841] [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: 10/25/2023] [Accepted: 12/19/2023] [Indexed: 03/08/2024] Open
Abstract
Background Fundamental investigations into the location, load, and persistence of microbes, whether beneficial or detrimental, are scarce. Many questions about the retention and survival of microbes on various surfaces, as well as the load necessary for spread, exist. To answer these questions, we must know more about where to find various microbes and in what concentrations, the composition of the microbial communities, and the extent of dissemination between various elements. This study investigated the diversity, composition, and relative abundance of the communities associated with manure, lagoons, troughs, house flies, and stable flies present at a dairy, implementing two different free-stall management systems: flow-through and cross-vent. Shotgun metagenomics at the community level was used to compare the microbiomes within the dairy, allowing confident interpretation at the species level. Results The results showed that there were significant difference in microbial composition between not only each of the dairy elements but also management styles. The primary exceptions were the microbiomes of the house fly and the stable fly. Their compositions heavily overlapped with one another, but interestingly, not with the other components sampled. Additionally, both species of flies carried more pathogens than the other elements of the dairy, indicating that they may not share these organisms with the other components, or that the environments offered by the other components are unsatisfactory for the survival of some pathogens.. Conclusion The lack of overlapping pathogen profiles suggests a lack of transfer from flies to other dairy elements. Dairy health data, showing a low incidence of disease, suggests minimal sharing of bacteria by the flies at a level required for infection, given the health program of this dairy. While flies did carry a multitude of pathogenic bacteria, the mere presence of the bacteria associated with the flies did not necessarily translate into high risk leading to morbidity and mortality at this dairy. Thus, using flies as the sole sentinel of dairy health may not be appropriate for all bacterial pathogens or dairies.
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Affiliation(s)
- Tawni L. Crippen
- Southern Plains Agricultural Research Center, Agricultural Research Service, US Department of Agriculture, College Station, TX, United States
| | - Dongmin Kim
- Department of Entomology, Texas A & M University, College Station, TX, United States
| | - Toni L. Poole
- Southern Plains Agricultural Research Center, Agricultural Research Service, US Department of Agriculture, College Station, TX, United States
| | - Sonja L. Swiger
- Entomology Extension, Texas AgriLife, Texas A & M University, College Station, TX, United States
| | - Robin C. Anderson
- Southern Plains Agricultural Research Center, Agricultural Research Service, US Department of Agriculture, College Station, TX, United States
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da Silva JD, Melo LDR, Santos SB, Kropinski AM, Xisto MF, Dias RS, da Silva Paes I, Vieira MS, Soares JJF, Porcellato D, da Silva Duarte V, de Paula SO. Genomic and proteomic characterization of vB_SauM-UFV_DC4, a novel Staphylococcus jumbo phage. Appl Microbiol Biotechnol 2023; 107:7231-7250. [PMID: 37741937 PMCID: PMC10638138 DOI: 10.1007/s00253-023-12743-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 04/03/2023] [Accepted: 08/21/2023] [Indexed: 09/25/2023]
Abstract
Staphylococcus aureus is one of the most relevant mastitis pathogens in dairy cattle, and the acquisition of antimicrobial resistance genes presents a significant health issue in both veterinary and human fields. Among the different strategies to tackle S. aureus infection in livestock, bacteriophages have been thoroughly investigated in the last decades; however, few specimens of the so-called jumbo phages capable of infecting S. aureus have been described. Herein, we report the biological, genomic, and structural proteomic features of the jumbo phage vB_SauM-UFV_DC4 (DC4). DC4 exhibited a remarkable killing activity against S. aureus isolated from the veterinary environment and stability at alkaline conditions (pH 4 to 12). The complete genome of DC4 is 263,185 bp (GC content: 25%), encodes 263 predicted CDSs (80% without an assigned function), 1 tRNA (Phe-tRNA), multisubunit RNA polymerase, and an RNA-dependent DNA polymerase. Moreover, comparative analysis revealed that DC4 can be considered a new viral species belonging to a new genus DC4 and showed a similar set of lytic proteins and depolymerase activity with closely related jumbo phages. The characterization of a new S. aureus jumbo phage increases our understanding of the diversity of this group and provides insights into the biotechnological potential of these viruses. KEY POINTS: • vB_SauM-UFV_DC4 is a new viral species belonging to a new genus within the class Caudoviricetes. • vB_SauM-UFV_DC4 carries a set of RNA polymerase subunits and an RNA-directed DNA polymerase. • vB_SauM-UFV_DC4 and closely related jumbo phages showed a similar set of lytic proteins.
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Affiliation(s)
- Jéssica Duarte da Silva
- Department of Microbiology, Federal University of Viçosa, Av. Peter Henry Rolfs, S/N, Campus Universitário, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Luís D R Melo
- Centre of Biological Engineering - CEB, University of Minho, 4710-057, Braga, Portugal
- LABBELS - Associate Laboratory, Braga, Portugal
| | - Sílvio B Santos
- Centre of Biological Engineering - CEB, University of Minho, 4710-057, Braga, Portugal
- LABBELS - Associate Laboratory, Braga, Portugal
| | - Andrew M Kropinski
- Department of Pathobiology, University of Guelph, Guelph, ON, N1G 2W1, Canada
| | - Mariana Fonseca Xisto
- Department of General Biology, Federal University of Viçosa, Av. Peter Henry Rolfs, S/N, Campus Universitário, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Roberto Sousa Dias
- Department of General Biology, Federal University of Viçosa, Av. Peter Henry Rolfs, S/N, Campus Universitário, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Isabela da Silva Paes
- Department of General Biology, Federal University of Viçosa, Av. Peter Henry Rolfs, S/N, Campus Universitário, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Marcella Silva Vieira
- Department of General Biology, Federal University of Viçosa, Av. Peter Henry Rolfs, S/N, Campus Universitário, Viçosa, Minas Gerais, 36570-900, Brazil
| | - José Júnior Ferreira Soares
- Department of General Biology, Federal University of Viçosa, Av. Peter Henry Rolfs, S/N, Campus Universitário, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Davide Porcellato
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, P.O. Box 5003, 1432, Ås, Norway
| | - Vinícius da Silva Duarte
- Department of Microbiology, Federal University of Viçosa, Av. Peter Henry Rolfs, S/N, Campus Universitário, Viçosa, Minas Gerais, 36570-900, Brazil.
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, P.O. Box 5003, 1432, Ås, Norway.
| | - Sérgio Oliveira de Paula
- Department of General Biology, Federal University of Viçosa, Av. Peter Henry Rolfs, S/N, Campus Universitário, Viçosa, Minas Gerais, 36570-900, Brazil
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Tadielo LE, Dos Santos EAR, Possebon FS, Schmiedt JA, Juliano LCB, Cerqueira-Cézar CK, de Oliveira JP, Sampaio ANDCE, Melo PRL, Caron EFF, Pinto JPDAN, Bersot LDS, Pereira JG. Characterization of microbial ecology, Listeria monocytogenes, and Salmonella sp. on equipment and utensil surfaces in Brazilian poultry, pork, and dairy industries. Food Res Int 2023; 173:113422. [PMID: 37803760 DOI: 10.1016/j.foodres.2023.113422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 08/09/2023] [Accepted: 08/29/2023] [Indexed: 10/08/2023]
Abstract
This study aimed to evaluate the level of counting by indicator microorganisms, identify the microbial ecology, detect Listeria monocytogenes and Salmonella sp., and determine the presence of virulence genes and biofilm formation. A total of 480 samples were collected from the surfaces of the equipment and utensils using sterile swabs for the detection of L. monocytogenes and Salmonella sp. and counting mesophilic aerobes, Enterobacteriaceae, Escherichia coli, and Pseudomonas sp. The microbial ecology was evaluated by sequencing the 16S rRNA gene. Genes for virulence and biofilm formation were analyzed and adhesion capacity was evaluated for L. monocytogenes and Salmonella sp. The mesophilic aerobe count was the highest in the dairy processing facility, followed by the pork and poultry slaughterhouses. L. monocytogenes was detected in all facilities, with the highest detection in the pork slaughterhouse, followed by the poultry and dairy facilities. Salmonella sp. was only detected in the dairy. Isolates of L. monocytogenes and Salmonella sp. showed poor adhesion to polystyrene surfaces, virulence genes, and biofilm formation. The frequent contaminants in the slaughterhouses were Pseudomonas, Acinetobacter, and Aeromonas in poultry, Acinetobacter, Pseudomonas, and Brevundimonas in pork, and Pseudomonas, Kocuria, and Staphylococcus in dairy. Our results provide useful information to understand the microbiological risks associated with contamination.
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Affiliation(s)
- Leonardo Ereno Tadielo
- São Paulo State University (UNESP), Botucatu Campus, School of Veterinary Medicine and Animal Science, Distrito de Rubião Jr, SN, 18618-681 Botucatu, São Paulo, Brazil
| | - Emanoelli Aparecida Rodrigues Dos Santos
- São Paulo State University (UNESP), Botucatu Campus, School of Veterinary Medicine and Animal Science, Distrito de Rubião Jr, SN, 18618-681 Botucatu, São Paulo, Brazil
| | - Fábio Sossai Possebon
- São Paulo State University (UNESP), Botucatu Campus, School of Veterinary Medicine and Animal Science, Distrito de Rubião Jr, SN, 18618-681 Botucatu, São Paulo, Brazil
| | - Jhennifer Arruda Schmiedt
- Federal University of Paraná (UFPR), Palotina Campus, Department of Veterinary Sciences, Rua Pioneiro, 2153, Jardim Dallas, 85950-000 Palotina, PR, Brazil
| | - Lara Cristina Bastos Juliano
- São Paulo State University (UNESP), Botucatu Campus, School of Veterinary Medicine and Animal Science, Distrito de Rubião Jr, SN, 18618-681 Botucatu, São Paulo, Brazil
| | - Camila Koutsodontis Cerqueira-Cézar
- São Paulo State University (UNESP), Botucatu Campus, School of Veterinary Medicine and Animal Science, Distrito de Rubião Jr, SN, 18618-681 Botucatu, São Paulo, Brazil
| | - Janaina Prieto de Oliveira
- São Paulo State University (UNESP), Botucatu Campus, School of Veterinary Medicine and Animal Science, Distrito de Rubião Jr, SN, 18618-681 Botucatu, São Paulo, Brazil
| | - Aryele Nunes da Cruz Encide Sampaio
- São Paulo State University (UNESP), Botucatu Campus, School of Veterinary Medicine and Animal Science, Distrito de Rubião Jr, SN, 18618-681 Botucatu, São Paulo, Brazil
| | - Patrícia Regina Lopes Melo
- São Paulo State University (UNESP), Botucatu Campus, School of Veterinary Medicine and Animal Science, Distrito de Rubião Jr, SN, 18618-681 Botucatu, São Paulo, Brazil
| | - Evelyn Fernanda Flores Caron
- São Paulo State University (UNESP), Botucatu Campus, School of Veterinary Medicine and Animal Science, Distrito de Rubião Jr, SN, 18618-681 Botucatu, São Paulo, Brazil
| | - José Paes de Almeida Nogueira Pinto
- São Paulo State University (UNESP), Botucatu Campus, School of Veterinary Medicine and Animal Science, Distrito de Rubião Jr, SN, 18618-681 Botucatu, São Paulo, Brazil
| | - Luciano Dos Santos Bersot
- Federal University of Paraná (UFPR), Palotina Campus, Department of Veterinary Sciences, Rua Pioneiro, 2153, Jardim Dallas, 85950-000 Palotina, PR, Brazil.
| | - Juliano Gonçalves Pereira
- São Paulo State University (UNESP), Botucatu Campus, School of Veterinary Medicine and Animal Science, Distrito de Rubião Jr, SN, 18618-681 Botucatu, São Paulo, Brazil.
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9
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Suzuki N, Purba FY, Inagawa H, Hattori Y, Isobe N. Effects of oral administration of lipopolysaccharide derived from Pantoea agglomerans on innate immunity of mammary glands in dairy goats. Vet Immunol Immunopathol 2023; 265:110664. [PMID: 37918120 DOI: 10.1016/j.vetimm.2023.110664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 10/19/2023] [Accepted: 10/20/2023] [Indexed: 11/04/2023]
Abstract
This study aimed to evaluate the effect of orally administered lipopolysaccharide (LPS) derived from Pantoea agglomerans (LPSpa) on innate immune functions, including the concentrations of antimicrobial components and interleukin (IL)-10 in goat milk, for the prevention of goat mastitis. Twelve Tokara goats were divided into two groups of six goats. Goats in the LPSpa and control groups were orally administrated with 0.4 g/kg dextrin with or without 0.02 mg/kg LPSpa for 7 days (day 0-6), respectively. After treatment (i.e., day 7), 1 μg LPS from Escherichia coli O111 (LPSec) was infused into one side of the udder in both groups to induce mastitis. Milk from all sides of the udder, saliva, and feces were collected on days 0 and 7. After LPSec infusion into the udders, milk was collected from the infused side of the udder on days 8, 10, and 12. Milk yields and somatic cell counts were recorded during the examination period. The concentrations of immunoglobulin (Ig) A in saliva, feces, and milk and the concentrations of lactoferrin, goat β defensin-1 (GBD1), S100A7, and IL-10 in milk were measured. After LPSpa oral administration, the concentrations of GBD-1 and IL-10 in the milk of the LPSpa group were significantly higher on day 7 than those in the control group, and the concentration of IgA in the feces tended to be higher than that in the control group. After LPSec intramammary infusion, S100A7 concentration on day 12 was significantly lower in the LPSpa group than in the control group. These findings suggest that the oral administration of LPSpa may prevent mastitis by increasing the concentration of GBD1 in milk.
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Affiliation(s)
- Naoki Suzuki
- Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8528, Japan
| | - Fika Yuliza Purba
- Veterinary Medicine Study Program, Faculty of Medicine, Hasanuddin University, Makassar 90245, Indonesia
| | - Hiroyuki Inagawa
- Control of Innate Immunity, Technology Research Association, Takamatsu, Kagawa 761-0301, Japan; Macrophi Inc., Takamatsu, Kagawa 761-0301, Japan
| | | | - Naoki Isobe
- Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8528, Japan.
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10
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Walzl A, Marbach H, Belikova D, Vogl C, Ehling-Schulz M, Heilbronner S, Grunert T. Prevalence of the SigB-Deficient Phenotype among Clinical Staphylococcus aureus Isolates Linked to Bovine Mastitis. Antibiotics (Basel) 2023; 12:699. [PMID: 37107061 PMCID: PMC10135042 DOI: 10.3390/antibiotics12040699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 03/27/2023] [Accepted: 03/30/2023] [Indexed: 04/07/2023] Open
Abstract
Phenotypic adaptation has been associated with persistent, therapy-resistant Staphylococcus aureus infections. Recently, we described within-host evolution towards a Sigma factor B (SigB)-deficient phenotype in a non-human host, a naturally infected dairy cow with chronic, persistent mastitis. However, to our knowledge, the prevalence of SigB deficiency among clinical S. aureus isolates remains unknown. In this study, we screened a collection of bovine mastitis isolates for phenotypic traits typical for SigB deficiency: decreased carotenoid pigmentation, increased proteolysis, secretion of α-hemolysin and exoproteins. Overall, 8 out of 77 (10.4%) isolates of our bovine mastitis collection exhibited the SigB-deficient phenotype. These isolates were assigned to various clonal complexes (CC8, CC9, CC97, CC151, CC3666). We further demonstrated a strong positive correlation between asp23-expression (a marker of SigB activity) and carotenoid pigmentation (r = 0.6359, p = 0.0008), underlining the role of pigmentation as a valuable predictor of the functional status of SigB. Sequencing of the sigB operon (mazEF-rsbUVW-sigB) indicated the phosphatase domain of the RsbU protein as a primary target of mutations leading to SigB deficiency. Indeed, by exchanging single nucleotides in rsbU, we could either induce SigB deficiency or restore the SigB phenotype, demonstrating the pivotal role of RsbU for SigB functionality. The data presented highlight the clinical relevance of SigB deficiency, and future studies are needed to exploit its role in staphylococcal infections.
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Affiliation(s)
- Anna Walzl
- Institute of Microbiology, Department of Pathobiology, University of Veterinary Medicine, A-1210 Vienna, Austria
| | - Helene Marbach
- Institute of Microbiology, Department of Pathobiology, University of Veterinary Medicine, A-1210 Vienna, Austria
| | - Darya Belikova
- Interfaculty Institute of Microbiology and Infection Medicine, University of Tübingen, D-72076 Tübingen, Germany
| | - Claus Vogl
- Molecular Genetics, Institute of Animal Breeding and Genetics, Department of Biomedical Sciences, University of Veterinary Medicine, A-1210 Vienna, Austria
| | - Monika Ehling-Schulz
- Institute of Microbiology, Department of Pathobiology, University of Veterinary Medicine, A-1210 Vienna, Austria
| | - Simon Heilbronner
- Interfaculty Institute of Microbiology and Infection Medicine, University of Tübingen, D-72076 Tübingen, Germany
| | - Tom Grunert
- Institute of Microbiology, Department of Pathobiology, University of Veterinary Medicine, A-1210 Vienna, Austria
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11
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Mayorga-Martinez CC, Castoralova M, Zelenka J, Ruml T, Pumera M. Swarming Magnetic Microrobots for Pathogen Isolation from Milk. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2205047. [PMID: 36475385 DOI: 10.1002/smll.202205047] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 11/01/2022] [Indexed: 06/17/2023]
Abstract
Bovine mastitis produced by Staphylococcus aureus (S. aureus) causes major problems in milk production due to the staphylococcal enterotoxins produced by this bacterium. These enterotoxins are stable and cannot be eradicated easily by common hygienic procedures once they are formed in dairy products. Here, magnetic microrobots (MagRobots) are developed based on paramagnetic hybrid microstructures loaded with IgG from rabbit serum that can bind and isolate S. aureus from milk in a concentration of 3.42 104 CFU g-1 (allowable minimum level established by the United States Food and Drug Administration, FDA). Protein A, which is present on the cell wall of S. aureus, selectively binds IgG from rabbit serum and loads the bacteria onto the surface of the MagRobots. The selective isolation of S. aureus is confirmed using a mixed suspension of S. aureus and Escherichia coli (E. coli). Moreover, this fuel-free system based on magnetic robots does not affect the natural milk microbiota or add any toxic compound resulting from fuel catalysis. This system can be used to isolate and transport efficiently S. aureus and discriminate it from nontarget bacteria for subsequent identification. Finally, this system can be scaled up for industrial use in food production.
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Affiliation(s)
- Carmen C Mayorga-Martinez
- Center for Advanced Functional Nanorobots, Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technicka 5, 166 28, Czech Republic
| | - Marketa Castoralova
- Department of Biochemistry and Microbiology, University of Chemistry and Technology Prague, Technicka 5, 166 28, Czech Republic
| | - Jaroslav Zelenka
- Department of Biochemistry and Microbiology, University of Chemistry and Technology Prague, Technicka 5, 166 28, Czech Republic
| | - Tomas Ruml
- Department of Biochemistry and Microbiology, University of Chemistry and Technology Prague, Technicka 5, 166 28, Czech Republic
| | - Martin Pumera
- Center for Advanced Functional Nanorobots, Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technicka 5, 166 28, Czech Republic
- Faculty of Electrical Engineering and Computer Science, VSB - Technical University of Ostrava, 17. listopadu 2172/15, Ostrava, 70800, Czech Republic
- Department of Medical Research, China Medical University Hospital, China Medical University, No. 91 Hsueh-Shih Road, Taichung, 40402, Taiwan
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Korea
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12
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Kang Y, Shi S, Sun H, Dan J, Liang Y, Zhang Q, Su Z, Wang J, Zhang W. Magnetic Nanoseparation Technology for Efficient Control of Microorganisms and Toxins in Foods: A Review. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:16050-16068. [PMID: 36533981 DOI: 10.1021/acs.jafc.2c07132] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Outbreaks of foodborne diseases mediated by food microorganisms and toxins remain one of the leading causes of disease and death worldwide. It not only poses a serious threat to human health and safety but also imposes a huge burden on health care and socioeconomics. Traditional methods for the removal and detection of pathogenic bacteria and toxins in various samples such as food and drinking water have certain limitations, requiring a rapid and sensitive strategy for the enrichment and separation of target analytes. Magnetic nanoparticles (MNPs) exhibit excellent performance in this field due to their fascinating properties. The strategy of combining biorecognition elements with MNPs can be used for fast and efficient enrichment and isolation of pathogens. In this review, we describe new trends and practical applications of magnetic nanoseparation technology in the detection of foodborne microorganisms and toxins. We mainly summarize the biochemical modification and functionalization methods of commonly used magnetic nanomaterial carriers and discuss the application of magnetic separation combined with other instrumental analysis techniques. Combined with various detection techniques, it will increase the efficiency of detection and identification of microorganisms and toxins in rapid assays.
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Affiliation(s)
- Yi Kang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
| | - Shuo Shi
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
| | - Hao Sun
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
| | - Jie Dan
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
| | - Yanmin Liang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
| | - Qiuping Zhang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
| | - Zehui Su
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
| | - Jianlong Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
| | - Wentao Zhang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
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The Cleanability of Laser Etched Surfaces with Repeated Fouling using Staphylococcus aureus and Milk. FOOD AND BIOPRODUCTS PROCESSING 2022. [DOI: 10.1016/j.fbp.2022.11.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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14
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Gajewska J, Chajęcka-Wierzchowska W, Zadernowska A. Occurrence and Characteristics of Staphylococcus aureus Strains along the Production Chain of Raw Milk Cheeses in Poland. Molecules 2022; 27:molecules27196569. [PMID: 36235105 PMCID: PMC9573400 DOI: 10.3390/molecules27196569] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 09/29/2022] [Accepted: 09/30/2022] [Indexed: 11/06/2022] Open
Abstract
Cheeses produced from unpasteurized milk by traditional production methods may contain many groups of microorganisms, including Staphylococcus aureus. The aim of this study was to determine the occurrence of S. aureus in the artisanal cheese production chain from unpasteurized milk. We investigated the prevalence of S. aureus strains isolated from various stages of artisanal cheese of unpasteurized milk production from farms in the northeastern and southern parts of Poland and characterized them. Characterization included antimicrobial susceptibility by microbroth dilution and biofilm formation by in vitro assay. Among all strains, the presence of enterotoxigenic genes and genes involved with biofilm formation and antibiotic resistance were screened by PCR-based methods. A total of 180 samples were examined. A high percentage of strains were resistant to penicillin (54/58.1%) and tobramycin (32/34.4%). Some tested isolates also showed resistance to the macrolide class of antibiotics: azithromycin, clarithromycin, and erythromycin at 17/18.3%, 15/16.1%, and 21/22.6%, respectively. Among tested isolates, we also found phenotypic resistance to oxacillin (9/9.7%) and cefoxitin (12/12.9%). The blaZ gene encoding penicillin resistance was the most common gene encoding antibiotic resistance among the tested strains. All isolates showing phenotypic resistance to cefoxitin possessed the mecA gene. The study also evaluated the prevalence of biofilm-associated genes, with eno the most frequently associated gene. Eighty-nine out of 93 S. aureus isolates (95.7%) possessed at least one enterotoxin-encoding gene. The results of this study showed that production of raw milk cheeses may be a source of antibiotic resistance and virulent S. aureus. Our results suggest that artisanal cheese producers should better control production hygiene.
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15
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Genomic analysis, antibiotic resistance, and virulence of Staphylococcus aureus from food and food outbreaks: A potential public concern. Int J Food Microbiol 2022; 377:109825. [PMID: 35834921 DOI: 10.1016/j.ijfoodmicro.2022.109825] [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: 05/01/2022] [Revised: 06/04/2022] [Accepted: 06/27/2022] [Indexed: 11/23/2022]
Abstract
Transmission and outbreaks of Staphylococcus aureus among retail food highlights the need to comprehensive analysis the molecular characteristic of Staphylococcus aureus in foods. However, the information about Staphylococcus aureus in north China is limited. In this study, 97 and 28 S. aureus strains were isolated for analysis from 4262 samples of retail food and 61 samples food outbreaks with prevalence rate 2.28 % and 45.9 %, respectively in Jilin, China from 2014 to 2018. This study aimed to investigate the prevalence of S. aureus isolates and characterize by antimicrobial resistance testing, virulence profiles, spa typing, and multilocus sequence typing (MLST) analysis. 60 % (75/125) of the isolates contained at least enterotoxin genes including classic and new SEs genes as following: sea (40/125,32 %), see (36/125,28.8 %), sec (29/125,23.2 %), sell (29/125,23.2 %), seb (25/125,20 %), seh (22/125,17.6 %), sed (6/125,4.8 %), selq (6/125,4.8 %), and selk (6/125,4.8 %). In antimicrobial susceptibility tests, 59.2 % of the isolates (74/125) were considered as multi-drug-resistant isolates and four MRSA strains were all found with high multi-drug-resistance. Phenotype resistance to penicillin (94.4 %), erythromycin (84.2 %), clindamycin (63.9 %), and tetracycline (47.2 %) was observed which was corresponding with genotype resistance. The strains were classified to twenty-two sequence types (STs), fourteen clonal complexes (CCs), and forty-seven spa types. The predominant ST and spa types were ST1(22/125,17.6 %), ST25(20/125,16.00 %), ST398 (14/125,11.2 %) and t127 (20/125,16 %), t078 (14/125,11.2 %), t803 (7/125,5.6 %). The wgSNP analysis of these isolates in food represents showed close relatedness with food outbreaks which pose a potential health risk for consumers and warrants further attention.
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16
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Javed S, McClure J, Syed MA, Obasuyi O, Ali S, Tabassum S, Ejaz M, Zhang K. Epidemiology and molecular characterization of Staphylococcus aureus causing bovine mastitis in water buffaloes from the Hazara division of Khyber Pakhtunkhwa, Pakistan. PLoS One 2022; 17:e0268152. [PMID: 35512008 PMCID: PMC9071125 DOI: 10.1371/journal.pone.0268152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 04/22/2022] [Indexed: 11/18/2022] Open
Abstract
Buffalo represent a major source of milk in Pakistan. However, production is impacted by the disease bovine mastitis. Mastitis causes significant economic losses, with Staphylococcus aureus (S. aureus) being one of its major causative agents. While much work has been done understanding the epidemiology of bovine mastitis in Pakistan, detailed molecular characterization of the associated S. aureus is unavailable. In the current study both the epidemiological and molecular characterization of S. aureus from bovine mastitis in the Hazara division of Pakistan are examined. S. aureus was isolated from 18.41% of the animals, and left quarters more prone to infection (69.6%) than right quarters (30.4%). Sub-clinical mastitis (75.31%) was more prevalent than clinical mastitis (24.69%), with infections evenly distributed amongst the eight districts. Molecular characterization revealed that only 19.6% of the isolates were methicillin-resistant, and four strains types identified, including ST9-t7867-MSSA, ST9-MSSA, ST101-t2078-MSSA, and ST22-t8934-MRSA-IVa. Antiseptic resistance genes were not detected in the isolates, and low levels of antibiotic resistance were also noted, however the methicillin-resistant strains had higher overall antibiotic resistance. This study represents the most complete molecular typing data for S. aureus causing bovine mastitis in the Hazara district of Pakistan, and the country as a whole.
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Affiliation(s)
- Salma Javed
- Department of Zoology, Hazara University, Mansehra, Pakistan
| | - JoAnn McClure
- Centre for Antimicrobial Resistance, Alberta Health Services/Alberta Precision Laboratories/University of Calgary, Calgary, Alberta, Canada
| | - Muhammad Ali Syed
- Department of Microbiology, The University of Haripur, Haripur, Pakistan
| | - Osahon Obasuyi
- Department of Pathology & Laboratory Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Shahzad Ali
- Department of Wildlife and Ecology, One Health Research Group, Discipline of Zoology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Sadia Tabassum
- Department of Zoology, Hazara University, Mansehra, Pakistan
| | - Mohammad Ejaz
- Department of Microbiology, The University of Haripur, Haripur, Pakistan
| | - Kunyan Zhang
- Centre for Antimicrobial Resistance, Alberta Health Services/Alberta Precision Laboratories/University of Calgary, Calgary, Alberta, Canada
- Department of Pathology & Laboratory Medicine, University of Calgary, Calgary, Alberta, Canada
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, Alberta, Canada
- Department of Medicine, University of Calgary, Calgary, Alberta, Canada
- The Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
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17
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Juwita S, Indrawati A, Damajanti R, Safika S, Mayasari NLPI. Genetic relationship of Staphylococcus aureus isolated from humans, animals, environment, and Dangke products in dairy farms of South Sulawesi Province, Indonesia. Vet World 2022; 15:558-564. [PMID: 35497954 PMCID: PMC9047149 DOI: 10.14202/vetworld.2022.558-564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Accepted: 01/20/2022] [Indexed: 11/29/2022] Open
Abstract
Background and Aim: Staphylococcus aureus is a bacterium that causes several infectious diseases, including mastitis, endocarditis, and osteomyelitis, and poses a threat to human and animal health. This study aims to phenotypically and genetically identify S. aureus from the isolates collected from humans, animals, environment, and Dangke products in the dairy farms of South Sulawesi Province, Indonesia, as well as to establish a genetic relationship among the isolated S. aureus strains. Materials and Methods: The total number of samples was 142, comprising 30 humans (skin swab), 58 animals (raw milk), 14 dairy products (Dangke), and 40 environmental samples (water). S. aureus was phenotypically identified using the culture method, followed by Gram staining, catalase test, and coagulase test. Simultaneously, genotypic identification of S. aureus was performed using the conventional polymerase chain reaction and sequencing methods. Sequencing data were analyzed using the MEGA X software by comparing BLAST National Center for Biotechnology Information databases. Results: The phenotypic methods revealed that 56/142 (39.4%) animal, human, and Dangke samples grew on culture, and 56/56 (100%) were Gram stain positive, 56/56 (100%) catalase-positive, and 23/56 (41.1%) coagulase positive. The genotypic method revealed that 32/56 (57.1%) samples amplified the nuc gene. The phylogenetic analysis of 12 isolates revealed that they are all closely related and do not belong to distinct clades. Conclusion: It indicates that S. aureus isolates from animals (S30) are probably the same strain as human isolates (H2, H3, H4, and H5). The findings of this study can be used as information regarding the importance of preventing and controlling diseases caused by S. aureus using a health approach involving the human, animal, and environmental sectors. This study was limited to the sequencing analysis of the nuc gene.
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Affiliation(s)
- Sartika Juwita
- Department of Animal Disease and Veterinary Public Health, Faculty of Veterinary Medicine, IPB University, Bogor, Indonesia
| | - Agustin Indrawati
- Department of Animal Disease and Veterinary Public Health, Faculty of Veterinary Medicine, IPB University, Bogor, Indonesia
| | - Retno Damajanti
- Department of Animal Disease and Veterinary Public Health, Faculty of Veterinary Medicine, IPB University, Bogor, Indonesia
| | - Safika Safika
- Department of Animal Disease and Veterinary Public Health, Faculty of Veterinary Medicine, IPB University, Bogor, Indonesia
| | - Ni Luh Putu Ika Mayasari
- Department of Animal Disease and Veterinary Public Health, Faculty of Veterinary Medicine, IPB University, Bogor, Indonesia
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18
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Promoting the appreciation and marketability of artisanal Kochkäse (traditional German cheese): A review. Int Dairy J 2022. [DOI: 10.1016/j.idairyj.2021.105244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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19
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Suzuki N, Kaneko S, Isobe N. Rapid determination of pathogens in mastitic milk of dairy cows using Gram staining. J Vet Med Sci 2022; 84:325-329. [PMID: 35067496 PMCID: PMC8983286 DOI: 10.1292/jvms.21-0631] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
This study aimed to determine whether causative pathogens in mastitic milk can be determined by Gram staining after the centrifugation of milk. Gram staining was performed using
unconcentrated and concentrated milk cells. Using this method, we found that the background of microscopic image of unconcentrated milk cells was complex and bacteria were difficult to
detect. In contrast, the background of the smears in the concentrated milk cells was translucent, and bacterial and somatic cells were clearly visible. The sensitivity and specificity of the
Gram staining of concentrated milk cells were 84.4% and 86.0% and 50.0% and 94.5% for the detection of gram-positive and gram-negative bacteria, respectively. The presented method provides a
simple and inexpensive means of determining mastitis-causing pathogens.
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Affiliation(s)
- Naoki Suzuki
- Graduate School of Integrated Sciences for Life, Hiroshima University
| | | | - Naoki Isobe
- Graduate School of Integrated Sciences for Life, Hiroshima University
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20
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Sri Prabakusuma A, Zhu J, Shi Y, Ma Q, Zhao Q, Yang Z, Xu Y, Huang A. Prevalence and antimicrobial resistance profiling of Staphylococcus aureus isolated from traditional cheese in Yunnan, China. 3 Biotech 2022; 12:1. [PMID: 34926114 PMCID: PMC8639989 DOI: 10.1007/s13205-021-03072-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 11/22/2021] [Indexed: 01/03/2023] Open
Abstract
The prevalence of staphylococcal infection and the emergence of multidrug resistance of Staphylococcus aureus (S. aureus) are major concerns in food safety and public health. This study aimed to investigate the prevalence of S. aureus isolated from traditional Chinese Rubing and Rushan cheese, antimicrobial resistance profiles, genomic characteristics, and predict antimicrobial resistance genes (ARGs). From 124 samples, 18 of 62 (29.03%) of Rubing and 5 of 62 (8.06%) of Rushan cheese were confirmed to be S. aureus positive by standard culture-based methods. Twenty-three coagulase-positive staphylococci isolates were grouped into 16 clusters by pulsed-field gel electrophoresis and subjected to routine susceptibility testing to 12 antibiotics. Those isolates exhibited high resistance to penicillin (100%), erythromycin, trimethoprim-sulphamethoxazole (34.78%), oxacillin, clindamycin, and cefoxitin (21.74%). Multidrug-resistant (MDR) S. aureus was found in 34.78% (8 of 23) of isolates. Further, S. aureus strain DC.RB_015 isolated from Rubing cheese, recognized as the most resistant to six antibiotics, was selected for whole-genome sequencing (WGS), continued with in silico approaches. S. aureus DC.RB_015 had a single chromosome size of 2,794,578 bp and a plasmid size of 22,961 bp. The strain harbored 18 predicted ARGs, including eight efflux pump genes (mepA, tet(K), arlR, arlS, norA, mgrA, tet(38), LmrS), one peptidoglycan biosynthesis gene (bacA), two β-lactams resistance genes (mecA, blaZ), and seven genes conferring other antimicrobial resistance (APH(3')-IIIa, aad(6), ErmB, SAT-4, mecR1, GlpT, murA). The results of this study expand the knowledge of S. aureus strain DC.RB_015, increase food safety awareness, and will be helpful in establishing therapeutic therapy. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s13205-021-03072-4.
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Affiliation(s)
- Adhita Sri Prabakusuma
- Department of Food Technology, Faculty of Industrial Technology, Universitas Ahmad Dahlan, Yogyakarta, 55166 Indonesia
- College of Food Science and Technology, Yunnan Agricultural University, Kunming, 650201 China
| | - Jingjing Zhu
- College of Food Science and Technology, Yunnan Agricultural University, Kunming, 650201 China
| | - Yanan Shi
- College of Food Science and Technology, Yunnan Agricultural University, Kunming, 650201 China
| | - Qingwen Ma
- College of Food Science and Technology, Yunnan Agricultural University, Kunming, 650201 China
| | - Qiong Zhao
- College of Food Science and Technology, Yunnan Agricultural University, Kunming, 650201 China
| | - Zushun Yang
- Yunnan Center for Disease Control and Prevention (CDC), Kunming, 650100 Yunnan China
| | - Yan Xu
- Yunnan Center for Disease Control and Prevention (CDC), Kunming, 650100 Yunnan China
| | - Aixiang Huang
- College of Food Science and Technology, Yunnan Agricultural University, Kunming, 650201 China
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FERNANDES SILVA RODRIGUES L, LUNARA SANTOS PAVELQUESI S, ALMEIDA DE OLIVEIRA FERREIRA AC, DA SILVA MONTEIRO E, DE SOUZA SILVA CM, RODRIGUES DA SILVA IC, CASTILHO ORSI D. Microbiological evaluation of industrialized and artisanal Minas fresh cheese commercialized in the Federal District, Brazil. FOOD SCIENCE AND TECHNOLOGY 2022. [DOI: 10.1590/fst.45221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Kim G, Xu YJ, Farha AK, Sui ZQ, Corke H. Bactericidal and antibiofilm properties of Rumex japonicus Houtt. on multidrug-resistant Staphylococcus aureus isolated from milk. J Dairy Sci 2021; 105:2011-2024. [PMID: 34955261 DOI: 10.3168/jds.2021-21221] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 11/12/2021] [Indexed: 01/15/2023]
Abstract
Multidrug-resistant (MDR) Staphylococcus aureus and its biofilm formation have been challenging to control in milk and dairy industries. Biofilms formed by Staph. aureus may result in the failure of antibacterial agents and disinfectants to penetrate the biofilm in an attempt to control contamination. Novel natural antibacterial agents are required to combat MDR bacteria and biofilms. In this study, we evaluated the bactericidal, antibiofilm, and antimotility effects of Rumex japonicus Houtt. (RJH) extract on MDR Staph. aureus isolated from milk. The RJH extract exhibited good antibacterial activity against MDR strains with minimum inhibitory concentrations (MIC) ranging from 0.78 to 6.25 mg/mL and minimum bactericidal concentrations ranging from 3.125 to 12.5 mg/mL. The extract showed strong inhibition of biofilm formation (81.9%) at sub-MIC value and eradication of biofilm at higher concentrations. The motility of Staph. aureus was effectively blocked by the extract. Major compounds emodin, chrysophanol, and physcion were identified in RJH extract using HPLC-linear trap quadrupole (LTQ)/Orbitrap-mass spectrometry. The extract was nontoxic to human epithelial cell lines such as Caco-2 and HT-29 cell lines at concentrations ranging from 0.1 to 0.5 mg/mL, and from 0.1 to 0.75 mg/mL, respectively. These findings suggest that RJH extract could be an alternative to synthetic preservatives in milk and dairy products.
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Affiliation(s)
- G Kim
- Department of Food Science and Technology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Y J Xu
- Department of Food Science and Technology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - A K Farha
- Department of Food Science and Technology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Z Q Sui
- Department of Food Science and Technology, Shanghai Jiao Tong University, Shanghai 200240, China.
| | - H Corke
- Biotechnology and Food Engineering Program, Guangdong Technion-Israel Institute of Technology, Shantou 515063, China; Faculty of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, Haifa 3200003, Israel.
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23
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Cáceres ME, Ledesma MM, Lombarte Serrat A, Vay C, Sordelli DO, Giacomodonato MN, Buzzola FR. Growth conditions affect biofilms of Staphylococcus aureus producing mastitis: Contribution of MALDI-TOF-MS to strain characterization. CURRENT RESEARCH IN MICROBIAL SCIENCES 2021; 2:100073. [PMID: 34841363 PMCID: PMC8610354 DOI: 10.1016/j.crmicr.2021.100073] [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: 09/02/2021] [Revised: 09/30/2021] [Accepted: 10/01/2021] [Indexed: 11/29/2022] Open
Abstract
S. aureus native strains formed in vitro high biofilm in milk. Milk whey and free iron medium significantly decreased the biofilms of S. aureus. MALDI-TOF-MS was a useful tool to categorize different levels of biofilm formation.
Bovine mastitis is a disease of dairy cattle prevalent throughout the world that causes alterations in the quality and composition of milk, compromising technological performance. Staphylococcus aureus is one of the most important pathogens that produce clinical, subclinical, and chronic mastitis. Biofilms are considered a virulence factor necessary for the survival of S. aureus in the mammary gland. Its zoonotic potential is important not only for the dairy industry sector but also for public health. This study aimed to evaluate the effect of different growing culture conditions on the biofilm formation of S. aureus isolated from mastitis and to test the MALDI-TOF-MS's ability to discriminate among different biofilm formation levels. Fluids commonly found in the dairy environment were incorporated to approach the pathogen's behavior in natural surroundings. PIA production was also evaluated. All strains were able to form high biofilms in TSB, TSBg, and milk. Milk changed the behavior of some strains which formed more biofilms in this medium than in TSBg. The free iron medium CTSBg and milk whey inhibited the biofilm formation of the most strains. MALDI-TOF-MS performance was an excellent tool to discriminate between high, moderate, and low biofilm producers strains of S. aureus in each media, confirming the results of crystal violet assay. PIA production was variable among the strains and showed a media-dependent behavior. Our data highlights the importance of considering the growing conditions that mimic the natural ones to the study of biofilm formation in vitro.
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Affiliation(s)
- María Emilia Cáceres
- Instituto de Investigaciones en Microbiología y Parasitología Médica (IMPaM), Universidad de Buenos Aires - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina.,Departamento de Microbiología, Parasitología e Inmunología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Martín Manuel Ledesma
- Facultad de Farmacia y Bioquímica, Hospital de Clínicas José de San Martín, Instituto de Fisiopatología y Bioquímica Clínica (INFIBIOC), Universidad de Buenos Aires, Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Andrea Lombarte Serrat
- Instituto de Investigaciones en Microbiología y Parasitología Médica (IMPaM), Universidad de Buenos Aires - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina.,Departamento de Microbiología, Parasitología e Inmunología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Carlos Vay
- Facultad de Farmacia y Bioquímica, Hospital de Clínicas José de San Martín, Instituto de Fisiopatología y Bioquímica Clínica (INFIBIOC), Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Daniel Oscar Sordelli
- Instituto de Investigaciones en Microbiología y Parasitología Médica (IMPaM), Universidad de Buenos Aires - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina.,Departamento de Microbiología, Parasitología e Inmunología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Mónica Nancy Giacomodonato
- Instituto de Investigaciones en Microbiología y Parasitología Médica (IMPaM), Universidad de Buenos Aires - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina.,Departamento de Microbiología, Parasitología e Inmunología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Fernanda Roxana Buzzola
- Instituto de Investigaciones en Microbiología y Parasitología Médica (IMPaM), Universidad de Buenos Aires - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina.,Departamento de Microbiología, Parasitología e Inmunología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
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24
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Park S, Ronholm J. Staphylococcus aureus in Agriculture: Lessons in Evolution from a Multispecies Pathogen. Clin Microbiol Rev 2021; 34:e00182-20. [PMID: 33568553 PMCID: PMC7950364 DOI: 10.1128/cmr.00182-20] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Staphylococcus aureus is a formidable bacterial pathogen that is responsible for infections in humans and various species of wild, companion, and agricultural animals. The ability of S. aureus to move between humans and livestock is due to specific characteristics of this bacterium as well as modern agricultural practices. Pathoadaptive clonal lineages of S. aureus have emerged and caused significant economic losses in the agricultural sector. While humans appear to be a primary reservoir for S. aureus, the continued expansion of the livestock industry, globalization, and ubiquitous use of antibiotics has increased the dissemination of pathoadaptive S. aureus in this environment. This review comprehensively summarizes the available literature on the epidemiology, pathophysiology, genomics, antibiotic resistance (ABR), and clinical manifestations of S. aureus infections in domesticated livestock. The availability of S. aureus whole-genome sequence data has provided insight into the mechanisms of host adaptation and host specificity. Several lineages of S. aureus are specifically adapted to a narrow host range on a short evolutionary time scale. However, on a longer evolutionary time scale, host-specific S. aureus has jumped the species barrier between livestock and humans in both directions several times. S. aureus illustrates how close contact between humans and animals in high-density environments can drive evolution. The use of antibiotics in agriculture also drives the emergence of antibiotic-resistant strains, making the possible emergence of human-adapted ABR strains from agricultural practices concerning. Addressing the concerns of ABR S. aureus, without negatively affecting agricultural productivity, is a challenging priority.
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Affiliation(s)
- Soyoun Park
- Faculty of Agricultural and Environmental Sciences, McGill University, Sainte-Anne-de-Bellevue, Quebec, Canada
| | - Jennifer Ronholm
- Faculty of Agricultural and Environmental Sciences, McGill University, Sainte-Anne-de-Bellevue, Quebec, Canada
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25
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Jayakumar J, Kumar VA, Biswas L, Biswas R. Therapeutic applications of lysostaphin against Staphylococcus aureus. J Appl Microbiol 2021; 131:1072-1082. [PMID: 33382154 DOI: 10.1111/jam.14985] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 12/11/2020] [Accepted: 12/28/2020] [Indexed: 12/14/2022]
Abstract
Staphylococcus aureus, an opportunistic pathogen, causes diverse community and nosocomial-acquired human infections, including folliculitis, impetigo, sepsis, septic arthritis, endocarditis, osteomyelitis, implant-associated biofilm infections and contagious mastitis in cattle. In recent days, both methicillin-sensitive and methicillin-resistant S. aureus infections have increased. Highly effective anti-staphylococcal agents are urgently required. Lysostaphin is a 27 kDa zinc metallo antimicrobial lytic enzyme that is produced by Staphylococcus simulans biovar staphylolyticus and was first discovered in the 1960s. Lysostaphin is highly active against S. aureus strains irrespective of their drug-resistant patterns with a minimum inhibitory concentration of ranges between 0·001 and 0·064 μg ml-1 . Lysostaphin has activity against both dividing and non-dividing S. aureus cells; and can seep through the extracellular matrix to kill the biofilm embedded S. aureus. In spite of having excellent anti-staphylococcal activity, its clinical application is hindered because of its immunogenicity and reduced bio-availability. Extensive research with lysostaphin lead to the development of several engineered lysostaphin derivatives with reduced immunogenicity and increased serum half-life. Therapeutic efficacy of both native and engineered lysostaphin derivatives was studied by several research groups. This review provides an overview of the therapeutic applications of native and engineered lysostaphin derivatives developed to eradicate S. aureus infections.
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Affiliation(s)
- J Jayakumar
- Center for Nanosciences and Molecular Medicine, Amrita Vishwa Vidyapeetham, Kochi, Kerala, India
| | - V A Kumar
- Department of Microbiology, Amrita Institute of Medical Sciences and Research Center, Amrita Vishwa Vidyapeetham, Kochi, Kerala, India
| | - L Biswas
- Center for Nanosciences and Molecular Medicine, Amrita Vishwa Vidyapeetham, Kochi, Kerala, India
| | - R Biswas
- Center for Nanosciences and Molecular Medicine, Amrita Vishwa Vidyapeetham, Kochi, Kerala, India
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26
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Chenouf NS, Mama OM, Messaï CR, Ruiz-Ripa L, Fernández-Fernández R, Carvalho I, Zitouni A, Hakem A, Torres C. Detection of methicillin-resistant coagulase-negative staphylococci and PVL/mecA genes in cefoxitin-susceptible Staphylococcus aureus (t044/ST80) from unpasteurized milk sold in stores in Djelfa, Algeria. J Dairy Sci 2021; 104:2684-2692. [PMID: 33455787 DOI: 10.3168/jds.2020-19270] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Accepted: 11/10/2020] [Indexed: 02/04/2023]
Abstract
This study was designed to determine antimicrobial resistance phenotypes and genotypes and virulence factors in Staphylococcus aureus and coagulase-negative staphylococci (CNS) in unpasteurized milk sold in Djelfa, Algeria. Eighty-two unpasteurized cow milk samples were randomly obtained from 82 retail stores in Djelfa and tested to detect staphylococci. Species were identified by biochemical tests and MALDI-TOF. Antimicrobial resistance phenotypes and genotypes were determined by disk diffusion test, PCR, and sequencing. The Staph. aureus isolates were subjected to spa typing, multilocus sequence typing, and detection of virulence genes and the scn gene by PCR and sequencing. Forty-five (54.9%) milk samples were contaminated by staphylococci and 45 isolates were recovered: 10 Staph. aureus (12.2% of total samples) and 35 CNS (42.7%). Resistance to penicillin (blaZ), tetracycline (tetL/tetK), and erythromycin (ermB/msrA/ermC) were the most common phenotypes (genotypes). Three CNS were methicillin-resistant and all were mecA-positive. The Staph. aureus isolates were ascribed to the following lineages [spa type/sequence type/associated clonal complex (number of isolates)]: t267/ST479/CC479 (n = 6), t1510/ST5651/CC45 (n = 1), t359/ST97/CC97/ (n = 1), t346/ST15/CC15 (n = 1), and t044/ST80 (n = 1). The mecA gene was detected in the cefoxitin-susceptible t044/ST80 isolate and co-harbored the lukF/lukS-PV and scn genes. The detection of mecA-PVL-positive Staph. aureus, methicillin-resistant CNS, and multidrug-resistant staphylococcal species indicates a potentially serious health issue and reveals that unpasteurized milk sold in Djelfa city could be a potential vehicle for pathogenic and antimicrobial-resistant staphylococci.
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Affiliation(s)
- Nadia Safia Chenouf
- Laboratoire d'Exploration et de Valorisation des Ecosystèmes Steppiques, BP3117, University of Djelfa, 17000 Algeria; Faculté des Sciences de la Nature et de la Vie, BP3117, University of Djelfa, 17000 Algeria; Laboratoire de Biologie des Systèmes Microbiens (LBSM), BP92, 16050, Ecole Normale Supérieure de Kouba, Algiers, Algeria; Area Bioquímica y Biología Molecular, Universidad de La Rioja, Madre de Dios 51, 26006 Logroño, Spain
| | - Olouwafemi Mistourah Mama
- Area Bioquímica y Biología Molecular, Universidad de La Rioja, Madre de Dios 51, 26006 Logroño, Spain
| | - Chafik Redha Messaï
- Laboratoire de Santé et Productions Animales, Rue Issad Abbes, Oued Smar 16000, Ecole Supérieure Nationale Vétérinaire, Algiers, Algeria
| | - Laura Ruiz-Ripa
- Area Bioquímica y Biología Molecular, Universidad de La Rioja, Madre de Dios 51, 26006 Logroño, Spain
| | - Rosa Fernández-Fernández
- Area Bioquímica y Biología Molecular, Universidad de La Rioja, Madre de Dios 51, 26006 Logroño, Spain
| | - Isabel Carvalho
- Area Bioquímica y Biología Molecular, Universidad de La Rioja, Madre de Dios 51, 26006 Logroño, Spain; University of Trás-os-Montes e Alto Douro (UTAD), 5000 Vila Real, Portugal
| | - Abdelghani Zitouni
- Laboratoire de Biologie des Systèmes Microbiens (LBSM), BP92, 16050, Ecole Normale Supérieure de Kouba, Algiers, Algeria
| | - Ahcène Hakem
- Laboratoire d'Exploration et de Valorisation des Ecosystèmes Steppiques, BP3117, University of Djelfa, 17000 Algeria; Center of Research in Agropastoralism, Djelfa, 17000, Algeria
| | - Carmen Torres
- Area Bioquímica y Biología Molecular, Universidad de La Rioja, Madre de Dios 51, 26006 Logroño, Spain.
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Shi Y, Zhu J, Xu Y, Tang X, Yang Z, Huang A. Malonyl-proteome profiles of Staphylococcus aureus reveal lysine malonylation modification in enzymes involved in energy metabolism. Proteome Sci 2021; 19:1. [PMID: 33436009 PMCID: PMC7802289 DOI: 10.1186/s12953-020-00169-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 12/16/2020] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Protein lysine malonylation, a novel post-translational modification (PTM), has been recently linked with energy metabolism in bacteria. Staphylococcus aureus is the third most important foodborne pathogen worldwide. Nonetheless, substrates and biological roles of malonylation are still poorly understood in this pathogen. RESULTS Using anti-malonyl-lysine antibody enrichment and high-resolution LC-MS/MS analysis, 440 lysine-malonylated sites were identified in 281 proteins of S. aureus strain. The frequency of valine in position - 1 and alanine at + 2 and + 4 positions was high. KEGG pathway analysis showed that six categories were highly enriched, including ribosome, glycolysis/gluconeogenesis, pentose phosphate pathway (PPP), tricarboxylic acid cycle (TCA), valine, leucine, isoleucine degradation, and aminoacyl-tRNA biosynthesis. In total, 31 malonylated sites in S. aureus shared homology with lysine-malonylated sites previously identified in E. coli, indicating malonylated proteins are highly conserved among bacteria. Key rate-limiting enzymes in central carbon metabolic pathways were also found to be malonylated in S. aureus, namely pyruvate kinase (PYK), 6-phosphofructokinase, phosphoglycerate kinase, dihydrolipoyl dehydrogenase, and F1F0-ATP synthase. Notably, malonylation sites were found at or near protein active sites, including KH domain protein, thioredoxin, alanine dehydrogenase (ALD), dihydrolipoyl dehydrogenase (LpdA), pyruvate oxidase CidC, and catabolite control protein A (CcpA), thus suggesting that lysine malonylation may affect the activity of such enzymes. CONCLUSIONS Data presented herein expand the current knowledge on lysine malonylation in prokaryotes and indicate the potential roles of protein malonylation in bacterial physiology and metabolism.
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Affiliation(s)
- Yanan Shi
- College of Food Science and Technology, Yunnan Agricultural University, Kunming, 650201, Yunnan, China
| | - Jingjing Zhu
- College of Food Science and Technology, Yunnan Agricultural University, Kunming, 650201, Yunnan, China
| | - Yan Xu
- Yunnan Center for Disease Control and Prevention, Kunming, 650201, Yunnan, China
| | - Xiaozhao Tang
- Yunnan Center for Disease Control and Prevention, Kunming, 650201, Yunnan, China
| | - Zushun Yang
- Yunnan Center for Disease Control and Prevention, Kunming, 650201, Yunnan, China
| | - Aixiang Huang
- College of Food Science and Technology, Yunnan Agricultural University, Kunming, 650201, Yunnan, China.
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Tohoyessou MG, Mousse W, Sina H, Kona F, Azanghadji T, Guessennd N, Baba-Moussa F, Dadie T, Adjanohoun A, Baba-Moussa L. Toxin Production and Resistance of Staphylococcus Species Isolated from Fermented Artisanal Dairy Products in Benin. J Pathog 2020; 2020:7938149. [PMID: 33204534 PMCID: PMC7649661 DOI: 10.1155/2020/7938149] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Revised: 09/01/2020] [Accepted: 10/13/2020] [Indexed: 11/28/2022] Open
Abstract
Staphylococcus species are considered as one of the major pathogens causing outbreaks of food poisoning. The aim of this work was to assess the toxinogenic and antibiotic susceptibility profiles of the strains of Staphylococcus spp isolated from three types of fermented dairy products (yoghourt, millet dêguê, and couscous dêguê). The isolation of the Staphylococcus strains was performed on selective media, and their identification was done using biochemical and molecular methods. The susceptibility at 15 antibiotics tested was assessed using the disc diffusion method. The immunodiffusion method was used to evaluate the toxin (luk-E/D, luk-S/F, ETA, and ETB) production. Biofilm formation was qualitatively researched on microplates. Less than half (42.77%) of the collected samples were contaminated with Staphylococcus spp. The yoghourt and millet dêguê samples collected in the afternoon were more contaminated than those collected in the morning. The S. aureus, S. capitis, and S. xylosus strains, respectively, were the most present. S. aureus was the only coagulase-positive species identified in our samples. The highest resistance to antibiotics was observed with penicillin (100%) irrespective of the nature of the sample. S. aureus strains were highly (71.4%) resistant to methicillin. The S. aureus strains were the most biofilm-forming (27.6%), followed by S. capitis strains. Panton and Valentine's leukocidin (luk-S/F) was produced by only S. aureus strains at a rate of 8.33%. Only coagulase-negative Staphylococcus (CNS) produced Luk-E/D. The high rates of Staphylococci contamination indicate bad hygiene quality during the production and distribution of dairy products. It is, therefore, necessary to improve the quality of fermented milk products.
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Affiliation(s)
- Majoie Géroxie Tohoyessou
- Laboratory Biology and Typing Molecular in Microbiology, Faculty of Science and Technology, University of Abomey-Calavi, 05 BP 1604, Cotonou, Benin
| | - Wassiyath Mousse
- Laboratory Biology and Typing Molecular in Microbiology, Faculty of Science and Technology, University of Abomey-Calavi, 05 BP 1604, Cotonou, Benin
| | - Haziz Sina
- Laboratory Biology and Typing Molecular in Microbiology, Faculty of Science and Technology, University of Abomey-Calavi, 05 BP 1604, Cotonou, Benin
| | - Fernique Kona
- Antibiotics, Natural Substances and Surveillance of Resistance of Microorganisms to Anti-Infective Unit (ASSURMI), Institute Pasteur of Ivory Coast, 01 BP 490, Abidjan 01, Côte d'Ivoire
| | - Tania Azanghadji
- Laboratory Biology and Typing Molecular in Microbiology, Faculty of Science and Technology, University of Abomey-Calavi, 05 BP 1604, Cotonou, Benin
| | - Nathalie Guessennd
- Antibiotics, Natural Substances and Surveillance of Resistance of Microorganisms to Anti-Infective Unit (ASSURMI), Institute Pasteur of Ivory Coast, 01 BP 490, Abidjan 01, Côte d'Ivoire
| | - Farid Baba-Moussa
- Laboratory of Microbiology and Food Technology, Faculty of Science and Technology, University of Abomey-Calavi, ISBA-Champ de Foire, 01 BP 526, Cotonou, Benin
| | - Thomas Dadie
- Laboratory of Biotechnology and Food Microbiology, University Nangui Abrogoua, 02 B.P. 801, Abidjan 02, Côte d'Ivoire
| | | | - Lamine Baba-Moussa
- Laboratory Biology and Typing Molecular in Microbiology, Faculty of Science and Technology, University of Abomey-Calavi, 05 BP 1604, Cotonou, Benin
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Schwendimann L, Berger T, Graber HU, Meier S, Hummerjohann JÖ, Jakob E. Effect of Scalding Temperature on Growth of Staphylococcus aureus and Formation of Staphylococcal Enterotoxin during the Production of Alpine Cheese in a Laboratory Cheesemaking Model. J Food Prot 2020; 83:1822-1828. [PMID: 32502266 DOI: 10.4315/jfp-19-600] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 06/02/2020] [Indexed: 11/11/2022]
Abstract
ABSTRACT To reduce the number of cheese with potential Staphylococcus aureus contamination reaching consumers, European legislation has stipulated that all cheese must be tested for coagulase-positive staphylococci (CPS) at the point in production when numbers are expected to be highest. When CPS counts exceed 105 CFU/mL, staphylococcal enterotoxin (SE) tests must be conducted. When SE tests are positive, the cheese must be destroyed. Manufacturers of Swiss Alpine cheese are exempt from this legislation because SE formation in hard cheese is expected to be very unlikely because of the high scalding temperatures used for cheeses during production, which inactive CPS in the curd. However, this assumption has not been scientifically tested. A laboratory-scale cheese production experiment was performed in which the conditions corresponded to certain limitations in practical cheesemaking conditions such as temperature and time exposure as for production of Gruyere or Tete de Moine Swiss type cheeses. Raw milk aliquots (200 mL) were inoculated with five strains of CPS, and scalding temperatures of 46 to 56°C were used during cheese production. The temperatures applied after the curd was pressed were meant to reproduce the temperature curve in the peripheral zone of a real cheese wheel. Contrary to expectations, SE formation occurred and differed according to the scalding temperature (52 to 56°C). The differences in SE formation were more associated with strain type rather than temperature. These results indicate that the mechanisms of SE formation in cheese require further study. HIGHLIGHTS
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Affiliation(s)
- Livia Schwendimann
- National Reference Laboratory for Coagulase Positive Staphylococci, Agroscope, Schwarzenburgstrasse 161, 3003 Berne, Switzerland.,(ORCID: https://orcid.org/0000-0001-6548-3988 [L.S.])
| | - Thomas Berger
- National Reference Laboratory for Coagulase Positive Staphylococci, Agroscope, Schwarzenburgstrasse 161, 3003 Berne, Switzerland
| | - Hans-Ulrich Graber
- National Reference Laboratory for Coagulase Positive Staphylococci, Agroscope, Schwarzenburgstrasse 161, 3003 Berne, Switzerland
| | - Susann Meier
- National Reference Laboratory for Coagulase Positive Staphylococci, Agroscope, Schwarzenburgstrasse 161, 3003 Berne, Switzerland
| | - JÖrg Hummerjohann
- National Reference Laboratory for Coagulase Positive Staphylococci, Agroscope, Schwarzenburgstrasse 161, 3003 Berne, Switzerland
| | - Ernst Jakob
- National Reference Laboratory for Coagulase Positive Staphylococci, Agroscope, Schwarzenburgstrasse 161, 3003 Berne, Switzerland
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30
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Tomao P, Pirolo M, Agnoletti F, Pantosti A, Battisti A, Di Martino G, Visaggio D, Monaco M, Franco A, Pimentel de Araujo F, Palei M, Benini N, Motta C, Bovo C, Di Renzi S, Vonesch N, Visca P. Molecular epidemiology of methicillin-resistant Staphylococcus aureus from dairy farms in North-eastern Italy. Int J Food Microbiol 2020; 332:108817. [PMID: 32777624 DOI: 10.1016/j.ijfoodmicro.2020.108817] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 07/30/2020] [Accepted: 08/05/2020] [Indexed: 12/14/2022]
Abstract
Transmission of Staphylococcus aureus along the dairy production chain is an emerging public health problem with human, veterinary, and food safety issues. The prevalence of multidrug-resistant, particularly methicillin-resistant S. aureus (MRSA), has steadily increased in several European countries. In this study, the prevalence of S. aureus in raw cow milk and farm workers was investigated, and the trajectories of MRSA transmission at the primary stage of the dairy chain were assessed. To this purpose, a longitudinal survey was conducted in 618 dairy farms in two contiguous regions with high livestock density in North-eastern Italy. S. aureus contamination of bulk tank milk (BTM) was observed in more than 80% of farms, while MRSA prevalence was 3.6% and 15.9% in BTM and farm workers, respectively. The majority of MRSA isolates from both BTM and farm workers were assigned to ST398, and showed a worrisome multidrug-resistant phenotype. Enterotoxin and Panton-Valentine leukocidin genes were detected in 11.5% and 4.9% of MRSA isolates from both sources. Nearly all MRSA isolates from workers belonged to the same epidemiological type as BTM isolates from the corresponding farm, denoting a bidirectional MRSA transmission pattern. A focus on the ST398 spa type t899 MRSA lineage in the Italian livestock system highlighted the presence of two major clusters whose dissemination was likely facilitated by the selective pressure imposed by antimicrobial use in animal farming. Our findings emphasize the need for continuous monitoring of MRSA along the dairy production chain, not only to avoid transmission between animals and exposed workers, but also to contain the risk of raw milk and dairy product contamination by multidrug resistant and toxigenic strain.
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Affiliation(s)
- Paola Tomao
- Department of Occupational and Environmental Medicine, Epidemiology and Hygiene, Italian Workers' Compensation Authority (INAIL), Monte Porzio Catone, Rome, Italy
| | - Mattia Pirolo
- Department of Science, Roma Tre University, Rome, Italy
| | - Fabrizio Agnoletti
- Istituto Zooprofilattico Sperimentale delle Venezie, Legnaro, Padua, Italy
| | - Annalisa Pantosti
- Department of Infectious, Parasitic and Immuno-mediated Diseases, Istituto Superiore di Sanità, Rome, Italy
| | - Antonio Battisti
- National Reference Laboratory for Antimicrobial Resistance, Istituto Zooprofilattico Sperimentale del Lazio e della Toscana "M. Aleandri", Rome, Italy
| | - Guido Di Martino
- Istituto Zooprofilattico Sperimentale delle Venezie, Legnaro, Padua, Italy
| | | | - Monica Monaco
- Department of Infectious, Parasitic and Immuno-mediated Diseases, Istituto Superiore di Sanità, Rome, Italy
| | - Alessia Franco
- National Reference Laboratory for Antimicrobial Resistance, Istituto Zooprofilattico Sperimentale del Lazio e della Toscana "M. Aleandri", Rome, Italy
| | | | - Manlio Palei
- Regione Autonoma Friuli-Venezia Giulia, Direzione Centrale Salute, Integrazione Sociosanitaria e Politiche Sociali-Servizio Sanità Pubblica Veterinaria, Trieste, Italy
| | | | - Cesare Motta
- Ulss20 Verona, Direzione Sanitaria, Verona, Italy
| | - Chiara Bovo
- Ulss20 Verona, Direzione Sanitaria, Verona, Italy
| | - Simona Di Renzi
- Department of Occupational and Environmental Medicine, Epidemiology and Hygiene, Italian Workers' Compensation Authority (INAIL), Monte Porzio Catone, Rome, Italy
| | - Nicoletta Vonesch
- Department of Occupational and Environmental Medicine, Epidemiology and Hygiene, Italian Workers' Compensation Authority (INAIL), Monte Porzio Catone, Rome, Italy
| | - Paolo Visca
- Department of Science, Roma Tre University, Rome, Italy.
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de Jesus GS, Micheletti AC, Padilha RG, de Souza de Paula J, Alves FM, Leal CRB, Garcez FR, Garcez WS, Yoshida NC. Antimicrobial Potential of Essential Oils from Cerrado Plants against Multidrug-Resistant Foodborne Microorganisms. Molecules 2020; 25:molecules25143296. [PMID: 32708062 PMCID: PMC7397120 DOI: 10.3390/molecules25143296] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 06/13/2020] [Accepted: 06/14/2020] [Indexed: 11/16/2022] Open
Abstract
Foodborne pathogens are a real public health concern in an escalating antimicrobial resistance scenario. Natural products represent a promising source of bioactive molecules, and essential oils have attracted much attention due to their myriad of biological properties, including antibacterial activities. In this context, essential oils obtained from the leaves of Chromolaena squalida, Campomanesia sessiliflora, Myrsine guianensis, Matayba guianensis, Siparuna guianensis, Ocotea minarum and Endlicheria paniculata—species from the Cerrado biome of Midwest Brazil—were extracted and evaluated for their antibacterial activity against a panel of four standard and three clinical multidrug−resistant bacterial strains. All tested oils showed moderate to good activity against at least four bacterial strains, including Salmonella Typhi and oxacillin−resistant Staphylococcus. The essential oils from C. squalida, C. sessiliflora, My. guianensis and Ma. guianensis showed strong inhibition of clinical Staphylococcus strains, which cause bovine mastitis and are related to milk−borne diseases. Their chemical profiles were investigated by gas chromatography coupled to mass spectrometry (GC/MS), which revealed a predominance of mono− and sesquiterpene hydrocarbons, some of which with well−known antimicrobial properties. The essential oil from Cerrado plants proved active against resistant Gram−positive and Gram−negative bacteria, revealing their potentialities for the development of new alternative agents to prevent the spreading of resistant bacterial contamination.
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Affiliation(s)
- Genilson Silva de Jesus
- Institute of Chemistry, Universidade Federal de Mato Grosso do Sul, Av. Senador Filinto Müller 1555, Campo Grande MS 79074460, Brazil; (G.S.d.J.); (A.C.M.); (R.G.P.); (J.d.S.d.P.); (F.R.G.); (W.S.G.)
| | - Ana Camila Micheletti
- Institute of Chemistry, Universidade Federal de Mato Grosso do Sul, Av. Senador Filinto Müller 1555, Campo Grande MS 79074460, Brazil; (G.S.d.J.); (A.C.M.); (R.G.P.); (J.d.S.d.P.); (F.R.G.); (W.S.G.)
| | - Rafael Gonçalves Padilha
- Institute of Chemistry, Universidade Federal de Mato Grosso do Sul, Av. Senador Filinto Müller 1555, Campo Grande MS 79074460, Brazil; (G.S.d.J.); (A.C.M.); (R.G.P.); (J.d.S.d.P.); (F.R.G.); (W.S.G.)
| | - Jessica de Souza de Paula
- Institute of Chemistry, Universidade Federal de Mato Grosso do Sul, Av. Senador Filinto Müller 1555, Campo Grande MS 79074460, Brazil; (G.S.d.J.); (A.C.M.); (R.G.P.); (J.d.S.d.P.); (F.R.G.); (W.S.G.)
| | - Flavio Macedo Alves
- Institute of Biosciences, Universidade Federal de Mato Grosso do Sul, Av. Costa e Silva s/n, Campo Grande MS 79070900, Brazil;
| | - Cassia Rejane Brito Leal
- Faculty of Veterinary Medicine and Animal Science, Universidade Federal de Mato Grosso do Sul, Av. Senador Filinto Müller 2443, Campo Grande MS 79070900, Brazil;
| | - Fernanda Rodrigues Garcez
- Institute of Chemistry, Universidade Federal de Mato Grosso do Sul, Av. Senador Filinto Müller 1555, Campo Grande MS 79074460, Brazil; (G.S.d.J.); (A.C.M.); (R.G.P.); (J.d.S.d.P.); (F.R.G.); (W.S.G.)
| | - Walmir Silva Garcez
- Institute of Chemistry, Universidade Federal de Mato Grosso do Sul, Av. Senador Filinto Müller 1555, Campo Grande MS 79074460, Brazil; (G.S.d.J.); (A.C.M.); (R.G.P.); (J.d.S.d.P.); (F.R.G.); (W.S.G.)
| | - Nidia Cristiane Yoshida
- Institute of Chemistry, Universidade Federal de Mato Grosso do Sul, Av. Senador Filinto Müller 1555, Campo Grande MS 79074460, Brazil; (G.S.d.J.); (A.C.M.); (R.G.P.); (J.d.S.d.P.); (F.R.G.); (W.S.G.)
- Correspondence: ; Tel.: +55-67-3345-3554
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Hu J, Wang Y, Ding H, Jiang C, Geng Y, Sun X, Jing J, Gao H, Wang Z, Dong C. Recombinase polymerase amplification with polymer flocculation sedimentation for rapid detection of Staphylococcus aureus in food samples. Int J Food Microbiol 2020; 331:108691. [PMID: 32534163 DOI: 10.1016/j.ijfoodmicro.2020.108691] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 05/12/2020] [Accepted: 05/26/2020] [Indexed: 01/02/2023]
Abstract
Currently, rapid, sensitive, and convenient visual detection methods for Staphylococcus aureus (S. aureus) are scarce. In this study, a novel detection method based on recombinase polymerase amplification (RPA) and polymer flocculation sedimentation (PFS) was developed. Twelve effective primer combinations derived from four forward primers F1, F2, F3, F4, and three reverse primers R1, R2, R3 targeting the nuc gene of S. aureus were designed and screened by a polymerase chain reaction and RPA methods. RPA reaction conditions, including temperature, time, and volume as well as PEG8000 and NaCl concentrations range, were optimized. Moreover, the specificity and sensitivity of the RPA-PFS assay were further analyzed. Finally, the potential use of the RPA-PFS assay was evaluated using artificially S. aureus contaminated food samples, including pork, beef, shrimp, fish, cheese, cabbage, leftover rice, egg, milk, and orange juice. Results showed that the SA5 (F2/R2) combination was the optimal primer candidate. The optimal temperature range, the shortest time and the minimal volume of RPA reaction were 40-42 °C, 10 min and 10 μL, respectively and the optimal PEG8000/NaCl concentrations were 0.2 g/mL and 2.5 M, respectively, for the adsorption between magnetic beads and RPA products. The RPA-PFS method could detect as little as 13 fg genomic DNA of S. aureus and was also specific for five target S. aureus as well as twenty-seven non-target foodborne bacteria. The limit of detection of RPA-PFS for S. aureus in artificially contaminated food samples was 38 CFU/mL (g). Besides, RPA-PFS has directly been judged by the naked eye and has totally taken less than 20 min. In short, the assay RPA-PFS developed in this study is a rapid, sensitive, and specific visual detection method for S. aureus.
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Affiliation(s)
- Jinqiang Hu
- School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450000, Henan Province, China; International Joint Laboratory of Food Safety, Zhengzhou 450000, Henan Province, China; Collaborative Innovation Center of Food Production and Safety, Zhengzhou 450000, Henan Province, China; Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Zhengzhou 450000, Henan Province, China.
| | - Yi Wang
- School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450000, Henan Province, China
| | - Huimin Ding
- School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450000, Henan Province, China
| | - Chunpeng Jiang
- School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450000, Henan Province, China
| | - Yao Geng
- School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450000, Henan Province, China; International Joint Laboratory of Food Safety, Zhengzhou 450000, Henan Province, China
| | - Xincheng Sun
- School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450000, Henan Province, China; International Joint Laboratory of Food Safety, Zhengzhou 450000, Henan Province, China
| | - Jianzhou Jing
- School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450000, Henan Province, China; International Joint Laboratory of Food Safety, Zhengzhou 450000, Henan Province, China
| | - Hui Gao
- School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450000, Henan Province, China; International Joint Laboratory of Food Safety, Zhengzhou 450000, Henan Province, China
| | - Zhangcun Wang
- School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450000, Henan Province, China
| | - Caiwen Dong
- School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450000, Henan Province, China
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Aljasir SF, D'Amico DJ. The effect of protective cultures on Staphylococcus aureus growth and enterotoxin production. Food Microbiol 2020; 91:103541. [PMID: 32539968 DOI: 10.1016/j.fm.2020.103541] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 04/01/2020] [Accepted: 04/30/2020] [Indexed: 10/24/2022]
Abstract
Staphylococcus aureus is the causative agent of staphylococcal food poisoning and is a common contaminant in milk. Despite efforts to control S. aureus, recalls and outbreaks continue to occur, highlighting the need for additional interventions. This study determined the potential for protective cultures (PC) that are commercially available to producers to control S. aureus growth in raw milk and attenuate virulence by impeding staphylococcal enterotoxin (SE) production in raw milk and laboratory medium. Cultures of Hafnia alvei and Lactococcus lactis effectively inhibited S. aureus growth in raw milk to counts ~5 log CFU/mL lower than control when cocultured following a cheesemaking time and temperature profile; two cultures of Lactobacillus plantarum inhibited growth to ~1.5 log CFU/mL less than control. Cocultures of S. aureus with Lc. lactis, H. alvei and Lb. plantarum in raw milk reduced SE levels by 24.9%, 62.4%, and 76%, respectively. Lc. lactis also decreased SE production in raw milk in the absence of PC-mediated growth inhibition. Significant reductions in SE production in the absence of pathogen growth inhibition were also achieved in laboratory medium. Together, these results demonstrate the potential for PCs to inhibit S. aureus growth and impede SE production in the absence of growth inhibition.
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Affiliation(s)
- Sulaiman F Aljasir
- Department of Animal Science, University of Connecticut, U-4163, Agricultural Biotechnology Laboratory, 1390 Storrs Road, Storrs, Connecticut 06269, USA.
| | - Dennis J D'Amico
- Department of Animal Science, University of Connecticut, U-4163, Agricultural Biotechnology Laboratory, 1390 Storrs Road, Storrs, Connecticut 06269, USA.
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Ma L, Petersen M, Lu X. Identification and Antimicrobial Susceptibility Testing of Campylobacter Using a Microfluidic Lab-on-a-Chip Device. Appl Environ Microbiol 2020; 86:e00096-20. [PMID: 32111591 PMCID: PMC7170473 DOI: 10.1128/aem.00096-20] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Accepted: 02/22/2020] [Indexed: 01/14/2023] Open
Abstract
Campylobacter spp. have been recognized as major foodborne pathogens worldwide. An increasing frequency of antibiotic-resistant pathogens, including Campylobacter spp., have been identified to transmit from food products to humans and cause severe threats to public health. To better mitigate the antibiotic resistance crisis, rapid detection methods are required to provide timely antimicrobial resistance surveillance data for agri-food systems. Herein, we developed a polymer-based microfluidic device for the identification and antimicrobial susceptibility testing (AST) of Campylobacter spp. An array of bacterial incubation chambers were created in the microfluidic device, where chromogenic medium and antibiotics were loaded. The growth of Campylobacter spp. was visualized by color change due to chromogenic reactions. This platform achieved 100% specificity for Campylobacter identification. Sensitive detection of multiple Campylobacter species (C. jejuni, C. coli, and C. lari) was obtained in artificially contaminated milk and poultry meat, with detection limits down to 1 × 102 CFU/ml and 1 × 104 CFU/25 g, respectively. On-chip AST determined Campylobacter antibiotic susceptibilities by the lowest concentration of antibiotics that can inhibit bacterial growth (i.e., no color change observed). High coincidences (91% to 100%) of on-chip AST and the conventional agar dilution method were achieved against several clinically important antibiotics. For a presumptive colony, on-chip identification and AST were completed in parallel within 24 h, whereas standard methods, including biochemical assays and traditional culture-based AST, take several days for multiple sequential steps. In conclusion, this lab-on-a-chip device can achieve rapid and reliable detection of antibiotic-resistant Campylobacter spp.IMPORTANCE Increasing concerns of antibiotic-resistant Campylobacter spp. with regard to public health emphasize the importance of efficient and fast detection. This study described the timely identification and antimicrobial susceptibility testing of Campylobacter spp. by using a microfluidic device. Our developed method not only reduced the total analysis time, but it also simplified food sample preparation and chip operation for end users. Due to the miniaturized size of the lab-on-a-chip platform, the detection was achieved by using up to 1,000 times less of the reagents than with standard reference methods, making it a competitive approach for rapid screening and surveillance study in food industries. In addition, multiple clinically important Campylobacter species (C. jejuni, C. coli, and C. lari) could be tested by our device. This device has potential for wide application in food safety management and clinical diagnostics, especially in resource-limited regions.
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Affiliation(s)
- Luyao Ma
- Food, Nutrition and Health Program, Faculty of Land and Food Systems, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Marlen Petersen
- Food, Nutrition and Health Program, Faculty of Land and Food Systems, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Xiaonan Lu
- Food, Nutrition and Health Program, Faculty of Land and Food Systems, The University of British Columbia, Vancouver, British Columbia, Canada
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35
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Chieffi D, Fanelli F, Cho GS, Schubert J, Blaiotta G, Franz CMAP, Bania J, Fusco V. Novel insights into the enterotoxigenic potential and genomic background of Staphylococcus aureus isolated from raw milk. Food Microbiol 2020; 90:103482. [PMID: 32336356 DOI: 10.1016/j.fm.2020.103482] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 02/27/2020] [Accepted: 02/29/2020] [Indexed: 11/17/2022]
Abstract
In this study, 53 Staphylococcus (S.) aureus strains were typed by 16S-23S rDNA intergenic spacer region (ISR) typing and staphylococcal enterotoxin gene (SEg) typing for all the staphylococcal enterotoxin (se) and staphylococcal enterotoxin-like toxin (sel) genes known to date, revealing a higher discriminatory power than that of multi locus sequence typing. Six strains, one of each ISR- and SEg-type, were genome sequenced and the ability to produce some classical and new SEs when growing in milk was investigated. The manual analysis of the six genomes allowed us to confirm, correct and expand the results of common available genomic data pipelines such as VirulenceFinder. Moreover, it enabled us to (i) investigate the actual location of se and sel genes, even for genes such as selY, whose location (in the core genome) was so far unknown, (ii) find novel allelic variants of se and sel genes and pseudogenes, (iii) correctly annotate se and sel genes and pseudogenes, and (iv) discover a novel type of enterotoxin gene cluster (egc), i.e. the egc type 5 in strains 356P and 364P, while S. argenteus MSHR1132 harbored the egc type 6. Four of the six S. aureus strains produced sufficient amounts of SEA, SEC, SED and SEH in milk to cause staphylococcal food poisoning (SFP), with S. aureus 372 P being the highest producer of SED in milk found to date, producing as much as ca. 47,300 ng/mL and 49,200 ng/mL of SED, after 24 and 48 h of incubation in milk at 37 °C, respectively. S. aureus 372 P released a low amount of SER in milk, most likely because the seR gene was present as a pseudogene, putatively encoding only 51 amino acids. These findings confirm that not only the classical SEs, but also the new ones can represent a potential hazard for the consumers' health if produced in foods in sufficient amounts. Therefore, the detection of SEs in foods, especially if involved in SFP cases, should focus not only on classical, but also on all the new SEs and SEls known to date. Where reference methods are unavailable, the presence of the relevant genes, by using the conventional and real time PCR protocols we exhaustively provided herein, and their nucleotide sequences, should be investigated.
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Affiliation(s)
- Daniele Chieffi
- National Research Council of Italy, Institute of Sciences of Food Production (CNR-ISPA), Bari, Italy
| | - Francesca Fanelli
- National Research Council of Italy, Institute of Sciences of Food Production (CNR-ISPA), Bari, Italy
| | - Gyu-Sung Cho
- Max Rubner-Institut, Department of Microbiology and Biotechnology, Hermann-Weigmann-Straße 1, 24103, Kiel, Germany
| | - Justyna Schubert
- Department of Food Hygiene and Consumer Health Protection, Wrocław University of Environmental and Life Sciences, Wrocław, Poland
| | - Giuseppe Blaiotta
- Department of Agricultural Sciences, Division of Vine and Wine Sciences, University of Naples Federico II, Viale Italia, 83100, Avellino, Italy
| | - Charles M A P Franz
- Max Rubner-Institut, Department of Microbiology and Biotechnology, Hermann-Weigmann-Straße 1, 24103, Kiel, Germany
| | - Jacek Bania
- Department of Food Hygiene and Consumer Health Protection, Wrocław University of Environmental and Life Sciences, Wrocław, Poland
| | - Vincenzina Fusco
- National Research Council of Italy, Institute of Sciences of Food Production (CNR-ISPA), Bari, Italy.
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Analysis of the Bacterial Diversity of Paipa Cheese (a Traditional Raw Cow's Milk Cheese from Colombia) by High-Throughput Sequencing. Microorganisms 2020; 8:microorganisms8020218. [PMID: 32041151 PMCID: PMC7074763 DOI: 10.3390/microorganisms8020218] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Revised: 02/03/2020] [Accepted: 02/04/2020] [Indexed: 12/18/2022] Open
Abstract
Background: Paipa cheese is a traditional, semi-ripened cheese made from raw cow’s milk in Colombia. The aim of this work was to gain insights on the microbiota of Paipa cheese by using a culture-independent approach. Method: two batches of Paipa cheese from three formal producers were sampled during ripening for 28 days. Total DNA from the cheese samples was used to obtain 16S rRNA gene sequences by using Illumina technology. Results: Firmicutes was the main phylum found in the cheeses (relative abundances: 59.2–82.0%), followed by Proteobacteria, Actinobacteria and Bacteroidetes. Lactococcus was the main genus, but other lactic acid bacteria (Enterococcus, Leuconostoc and Streptococcus) were also detected. Stapylococcus was also relevant in some cheese samples. The most important Proteobacteria were Enterobacteriaceae, Aeromonadaceae and Moraxellaceae. Enterobacter and Enterobacteriaceae (others) were detected in all cheese samples. Serratia and Citrobacter were detected in some samples. Aeromonas and Acinetobacter were also relevant. Other minor genera detected were Marinomonas, Corynebacterium 1 and Chryseobacterium. The principal coordinates analysis suggested that there were producer-dependent differences in the microbiota of Paipa cheeses. Conclusions: lactic acid bacteria are the main bacterial group in Paipa cheeses. However, other bacterial groups, including spoilage bacteria, potentially toxin producers, and bacteria potentially pathogenic to humans and/or prone to carry antimicrobial resistance genes are also relevant in the cheeses.
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Kim SG, Lee YD, Park JH, Moon GS. Synergistic Inhibition by Bacteriocin and Bacteriophage against Staphylococcus aureus. Food Sci Anim Resour 2020; 39:1015-1020. [PMID: 31950117 PMCID: PMC6949521 DOI: 10.5851/kosfa.2019.e95] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2019] [Revised: 12/02/2019] [Accepted: 12/03/2019] [Indexed: 12/16/2022] Open
Abstract
Staphylococcus aureus is a representative pathogenic bacterium carefully controlled in the dairy industry because it causes bovine mastitis and thus, can enter the dairy chain. Furthermore, the emergence of multi-drug resistant S. aureus is a big problem. We previously isolated a Lactococcus lactis strain producing a bacteriocin that exhibited strong antimicrobial activity against S. aureus. In this study, we investigated the synergistic inhibition of S. aureus by the bacteriocin and a bacteriophage (SAP84) which is specific to the organism. The bacteriocin (12.5-100 AU/mL) inhibited the growth of S. aureus KCTC 3881 in a dose-dependent manner, as did the bacteriophage SAP84 (0.001-1 MOI; multiplicity of infection). Co-treatment with the bacteriocin (100 AU/mL) and the bacteriophage (0.1 MOI) significantly inhibited the growth of S. aureus compared to each treatment alone (bacteriocin or bacteriophage), indicating the two components showed synergistic inhibition of S. aureus. Therefore, the bacteriocin and bacteriophage combination can be used as a good strategy for controlling pathogenic bacteria.
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Affiliation(s)
- Seon-Gyu Kim
- Department of Biotechnology, Korea National University of Transportation, Jeungpyeong 27909, Korea
| | - Young-Duck Lee
- Department of Food Science and Engineering, Seowon University, Cheongju 28674, Korea
| | - Jong-Hyun Park
- Department of Food Science and Biotechnology, Gachon University, Seongnam 13120, Korea
| | - Gi-Seong Moon
- Department of Biotechnology, Korea National University of Transportation, Jeungpyeong 27909, Korea
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Gazzola A, Maisano AM, Bianchini V, Vezzoli F, Romanò A, Graber HU, Cremonesi P, Zanardi G, Cappa V, Luini M. Short communication: Characterization of Staphylococcus aureus from bulk tank milk of dairy cattle in Lombardy (northern Italy). J Dairy Sci 2020; 103:2685-2692. [PMID: 31954577 DOI: 10.3168/jds.2019-17181] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 11/17/2019] [Indexed: 11/19/2022]
Abstract
Staphylococcus aureus is one of the most important pathogens causing mastitis in cattle, and it is responsible for economic losses in dairy herds worldwide. The PCR amplification of the 16S-23S rRNA intergenic spacer (ribosomal spacer PCR, RS-PCR) allows a rapid classification of the strains in genotypes and genotypic clusters (CL), which are characterized by different epidemiological and clinical properties. Both RS-PCR and multi-locus sequence typing (MLST) were performed on strains isolated from bovine bulk tank milk (BTM) collected from dairy herds located in the Lombardy region (northern Italy), to outline the distribution of Staph. aureus genotypes in this geographical area. Out of 844 examined samples, 398 were positive for Staph. aureus, with a variable count (cfu/mL) Up to 8 colonies from each sample were genotyped. A total of 1,101 Staph. aureus strains were analyzed with RS-PCR, and only a selection of them (n = 86), in relation to their frequency and geographical origin, underwent MLST. This study revealed 8 major genotypic clusters (CLB, CLC, CLR, CLS, CLI, CLF, CLAO, and CLZ), of which Staph. aureus CLB (29.3%) was the most common. Samples of BTM positive for CLB had a Staph. aureus cfu/mL count significantly higher than the non-CLB positive ones. Our MLST analysis showed genotypes already known as bovine-associated in literature, such as clonal complexes CC8, CC97, and CC151. The same selection of 86 strains was also analyzed for the presence of the adlb gene, which was recently proposed as a possible marker of contagiousness. Most Staph. aureus belonging to CLB or CC8 carried the adlb gene (85%), whereas this gene was detected in only 9% of non-CLB strains (CLAA, CLBI, CLBJ, CLS). In conclusion, the present study confirms that Staph. aureus CLB, which is recognized as a contagious genotype, is a particularly relevant agent of intramammary infection in dairy cows in Lombardy, and indirectly supports the idea that adlb can be a possible marker of contagiousness of isolates.
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Affiliation(s)
- A Gazzola
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia-Romagna, 26900 Lodi, Italy; Infectious Diseases Unit, Fondazione IRCCS "San Matteo," 27100 Pavia, Italy
| | - A M Maisano
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia-Romagna, 26900 Lodi, Italy.
| | - V Bianchini
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia-Romagna, 26900 Lodi, Italy
| | - F Vezzoli
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia-Romagna, 26900 Lodi, Italy
| | - A Romanò
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia-Romagna, 26900 Lodi, Italy; Agroscope, Food Microbial Systems, Group Microbiological Safety of Foods of Animal Origin, 3003 Berne, Switzerland
| | - H U Graber
- Agroscope, Food Microbial Systems, Group Microbiological Safety of Foods of Animal Origin, 3003 Berne, Switzerland
| | - P Cremonesi
- Institute of Agricultural Biology and Biotechnology, National Research Council, 26900 Lodi, Italy
| | - G Zanardi
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia-Romagna, Reparto Produzione Primaria, 25124 Brescia, Italy
| | - V Cappa
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia-Romagna, Osservatorio Epidemiologico Veterinario Regione Lombardia, 25124 Brescia, Italy
| | - M Luini
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia-Romagna, 26900 Lodi, Italy
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Characterization of Antibiotic and Biocide Resistance Genes and Virulence Factors of Staphylococcus Species Associated with Bovine Mastitis in Rwanda. Antibiotics (Basel) 2019; 9:antibiotics9010001. [PMID: 31861266 PMCID: PMC7167805 DOI: 10.3390/antibiotics9010001] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 12/09/2019] [Accepted: 12/13/2019] [Indexed: 12/26/2022] Open
Abstract
The present study was conducted from July to August 2018 on milk samples taken at dairy farms in the Northern Province and Kigali District of Rwanda in order to identify Staphylococcus spp. associated with bovine intramammary infection. A total of 161 staphylococcal isolates originating from quarter milk samples of 112 crossbred dairy cattle were included in the study. Antimicrobial susceptibility testing was performed and isolates were examined for the presence of various resistance genes. Staphylococcus aureus isolates were also analyzed for the presence of virulence factors, genotyped by spa typing and further phenotypically subtyped for capsule expression using Fourier Transform Infrared (FTIR) spectroscopy. Selected S. aureus were characterized using DNA microarray technology, multi-locus sequence typing (MLST) and whole-genome sequencing. All mecA-positive staphylococci were further genotyped using dru typing. In total, 14 different staphylococcal species were detected, with S. aureus being most prevalent (26.7%), followed by S. xylosus (22.4%) and S. haemolyticus (14.9%). A high number of isolates was resistant to penicillin and tetracycline. Various antimicrobial and biocide resistance genes were detected. Among S. aureus, the Panton-Valentine leukocidin (PVL) genes, as well as bovine leukocidin (LukM/LukF-P83) genes, were detected in two and three isolates, respectively, of which two also carried the toxic shock syndrome toxin gene tsst-1 bovine variant. t1236 was the predominant spa type. FTIR-based capsule serotyping revealed a high prevalence of non-encapsulated S. aureus isolates (89.5%). The majority of the selected S. aureus isolates belonged to clonal complex (CC) 97 which was determined using DNA microarray based assignment. Three new MLST sequence types were detected.
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Staphylococcus aureus enterotoxin genes detected in milk from various livestock species in northern pastoral region of Kenya. Food Control 2019. [DOI: 10.1016/j.foodcont.2019.04.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Phenolic Plant Extracts Versus Penicillin G: In Vitro Susceptibility of Staphylococcus aureus Isolated from Bovine Mastitis. Pharmaceuticals (Basel) 2019; 12:ph12030128. [PMID: 31480446 PMCID: PMC6789528 DOI: 10.3390/ph12030128] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 08/20/2019] [Accepted: 08/28/2019] [Indexed: 11/21/2022] Open
Abstract
Antibiotics are the elective drugs in bovine mastitis (BM) treatment, despite their low rates of efficiency and effectiveness and increasing risk of pathogen resistance. In this sense, it is urgent to discover new and effective antimicrobial agents to apply in BM control and even treatment. Plant extracts have been widely recognized as a rich source of phytochemicals with antimicrobial potential. Thus, the present work aims to compare the bioactivity of Eucalyptus globulus and Juglans regia extracts against Staphylococcus aureus bovine mastitis strains with penicillin G. At non-toxic concentrations, E. globulus exerted a bacteriostatic effect in planktonic cells and J. regia had no antimicrobial activity. Penicillin G, at minimum inhibitory concentration (MIC), demonstrated bactericidal activity, but just for S. aureus 3, 5, 6 and ATCC 25923, while the other strains seem to have acquired resistance. On the other hand, E. globulus and penicillin G in combination demonstrated synergy, being the most effective approach against S. aureus 1, 2 and 4. Thus, penicillin alone and in combination with E. globulus or J. regia seems to be promissory strategies to control bovine mastitis infections.
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Zare S, Derakhshandeh A, Haghkhah M, Naziri Z, Broujeni AM. Molecular typing of Staphylococcus aureus from different sources by RAPD-PCR analysis. Heliyon 2019; 5:e02231. [PMID: 31517083 PMCID: PMC6728420 DOI: 10.1016/j.heliyon.2019.e02231] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2019] [Revised: 06/12/2019] [Accepted: 08/01/2019] [Indexed: 01/31/2023] Open
Abstract
Staphylococcus aureus is an opportunistic bacterium which is carried as a normal flora organism but has a major role in the epidemiology and pathogenesis of different staphylococcal infections in humans and animals. Fifty S. aureus isolated from banknotes, foods, human infections and bovine mastitis were subjected to DNA fingerprinting by randomly amplified polymorphic DNA (RAPD) analysis to examine their genotypic polymorphism and investigate the amount of genetic relatedness among these various isolates. At 100% RAPD profile similarity level, isolates were classified into four, five and seven groups of the same clone, according to the RAPDPCR with OLP6, OLP11 and OLP13 primers, respectively. Amplification of the isolates resulted in several polymorphic bands ranged from >50 to >1500 bp in size. Maximum number of bands was obtained by primer OLP13 which produced seven bands in bovine mastitis isolates. Most polymorphisms were observed in isolates of bovine mastitis and the lowest were associated with human infections isolates. There was no relationship between the RAPD patterns and the sources of isolates, except the three clusters which showed host specificity and only included the strains from the same sources. The results confirm the wide genotypic diversity of the studied S. aureus strains. RAPD-PCR technique can be a valuable tool for assessing the genetic relationship, detection of polymorphism in S. aureus and tracing the sources and management of S. aureus infections.
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Affiliation(s)
- Sahar Zare
- Department of Pathobiology, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | - Abdollah Derakhshandeh
- Department of Pathobiology, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | - Masoud Haghkhah
- Department of Pathobiology, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | - Zahra Naziri
- Department of Pathobiology, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | - Azar Motamedi Broujeni
- Department of Pathobiology, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
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Titouche Y, Hakem A, Houali K, Meheut T, Vingadassalon N, Ruiz-Ripa L, Salmi D, Chergui A, Chenouf N, Hennekinne J, Torres C, Auvray F. Emergence of methicillin-resistant Staphylococcus aureus (MRSA) ST8 in raw milk and traditional dairy products in the Tizi Ouzou area of Algeria. J Dairy Sci 2019; 102:6876-6884. [DOI: 10.3168/jds.2018-16208] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2018] [Accepted: 03/23/2019] [Indexed: 12/22/2022]
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Zeaki N, Johler S, Skandamis PN, Schelin J. The Role of Regulatory Mechanisms and Environmental Parameters in Staphylococcal Food Poisoning and Resulting Challenges to Risk Assessment. Front Microbiol 2019; 10:1307. [PMID: 31244814 PMCID: PMC6581702 DOI: 10.3389/fmicb.2019.01307] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Accepted: 05/27/2019] [Indexed: 11/29/2022] Open
Abstract
Prevention, prediction, control, and handling of bacterial foodborne diseases - an ongoing, serious, and costly concern worldwide - are continually facing a wide array of difficulties. Not the least due to that food matrices, highly variable and complex, can impact virulence expression in diverse and unpredictable ways. This review aims to present a comprehensive overview of challenges related to the presence of enterotoxigenic Staphylococcus aureus in the food production chain. It focuses on characteristics, expression, and regulation of the highly stable staphylococcal enterotoxins and in particular staphylococcal enterotoxin A (SEA). Together with the robustness of the pathogen under diverse environmental conditions and the range of possible entry routes into the food chain, this poses some of the biggest challenges in the control of SFP. Furthermore, the emergence of new enterotoxins, found to be connected with SFP, brings new questions around their regulatory mechanisms and expression in different food environments. The appearance of increasing amounts of antibiotic resistant strains found in food is also highlighted. Finally, potentials and limitations of implementing existing risk assessment models are discussed. Various quantitative microbial risk assessment approaches have attempted to quantify the growth of the bacterium and production of disease causing levels of toxin under various food chain and domestic food handling scenarios. This requires employment of predictive modeling tools, quantifying the spatiotemporal population dynamics of S. aureus in response to intrinsic and extrinsic food properties. In this context, the armory of predictive modeling employs both kinetic and probabilistic models to estimate the levels that potentiate toxin production, the time needed to reach that levels, and overall, the likelihood of toxin production. Following risk assessment, the main challenge to mitigate the risk of S. aureus intoxication is first to prevent growth of the organism and then to hamper the production of enterotoxins, or at least prevent the accumulation of high levels (e.g., >10-20 ng) in food. The necessity for continued studies indeed becomes apparent based on the challenges to understand, control, and predict enterotoxin production in relation to the food environment. Different types of food, preservatives, processing, and packaging conditions; regulatory networks; and different staphylococcal enterotoxin-producing S. aureus strains need to be further explored to obtain more complete knowledge about the virulence of this intriguing pathogen.
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Affiliation(s)
- Nikoleta Zeaki
- Division of Applied Microbiology, Department of Chemistry, Lund University, Lund, Sweden
| | - Sophia Johler
- Institute for Food Safety and Hygiene, University of Zurich, Zurich, Switzerland
| | - Panagiotis N. Skandamis
- Laboratory of Food Quality Control and Hygiene, Department of Food Science and Human Nutrition, Agricultural University of Athens, Athens, Greece
| | - Jenny Schelin
- Division of Applied Microbiology, Department of Chemistry, Lund University, Lund, Sweden
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Elal Mus T, Cetinkaya F, Karahan H, Gurbuz IB, Degirmenci G. Investigation of mecA gene, virulence traits and antibiotic resistance profiles in methicillin‐resistant Staphylococcus aureusisolates from dairy products. J Food Saf 2019. [DOI: 10.1111/jfs.12620] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Tulay Elal Mus
- Department of Food ProcessingUniversity of Uludag Keles Bursa Turkey
| | - Figen Cetinkaya
- Faculty of Veterinary Medicine, Food Hygiene, and TechnologyUniversity of Uludag Nilüfer Bursa Turkey
| | - Hasan Karahan
- Department of Crop and Animal ProductionUniversity of Uludag Keles Bursa Turkey
| | | | - Gokhan Degirmenci
- Faculty of Veterinary Medicine, Food Hygiene, and TechnologyUniversity of Uludag Nilüfer Bursa Turkey
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Gomes F, Martins N, Ferreira IC, Henriques M. Anti-biofilm activity of hydromethanolic plant extracts against Staphylococcus aureus isolates from bovine mastitis. Heliyon 2019; 5:e01728. [PMID: 31193536 PMCID: PMC6535580 DOI: 10.1016/j.heliyon.2019.e01728] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 04/11/2019] [Accepted: 05/10/2019] [Indexed: 01/13/2023] Open
Abstract
Bovine mastitis (BM) presents a high incidence, being Staphylococcus aureus one of the major causative agents. Antibiotics comprise the most common therapeutic approach, but due to their indiscriminate use, high rates of increasingly resistant bacterial species have been markedly pointed out. Particularly, S. aureus possesses a pronounced ability to form biofilms, and therefore, are of pivotal interest due to its alarming pathogenicity. The present study investigates the antibacterial properties of Eucalyptus globulus methanol: water extracts, alone and in combination with Juglans regia, against S. aureus isolates from BM. All isolates and reference strain proved to be good biofilm producers after 24 h of bacterial growth. Individually, the studied plant extracts (PE) lead to a considerable biofilm cells reduction, but their combination revealed to be the most effective strategy. When tested in combination, both extracts led to a 3 and 5 log reduction for S. aureus ATCC 25923 and S. aureus 1, respectively. Based on these findings, both PE seem to be promissory antimicrobial agents for upcoming use on dairy industry contaminations, BM and even S. aureus-triggered food poisoning. Further studies are needed to understand which of the compounds present in the extracts are responsible for the observed effects, including their corresponding modes of action.
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Affiliation(s)
- Fernanda Gomes
- CEB, Centre of Biological Engineering, LIBRO–Laboratório de Investigação em Biofilmes Rosário Oliveira, University of Minho, 4710-057 Braga, Portugal
- Corresponding author.
| | - Natália Martins
- Faculty of Medicine, University of Porto, Alameda Prof. Hernâni Monteiro, 4200-319 Porto, Portugal
- Institute for Research and Innovation in Health (i3S), University of Porto, 4200-135 Porto, Portugal
| | - Isabel C.F.R. Ferreira
- Mountain Research Centre (CIMO), ESA, Polytechnic Institute of Bragança, Campus de Santa Apolónia, 1172, 5300-253 Bragança, Portugal
| | - Mariana Henriques
- CEB, Centre of Biological Engineering, LIBRO–Laboratório de Investigação em Biofilmes Rosário Oliveira, University of Minho, 4710-057 Braga, Portugal
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Chang Y, Bai J, Lee JH, Ryu S. Mutation of a Staphylococcus aureus temperate bacteriophage to a virulent one and evaluation of its application. Food Microbiol 2019; 82:523-532. [PMID: 31027814 DOI: 10.1016/j.fm.2019.03.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 03/27/2019] [Accepted: 03/28/2019] [Indexed: 01/21/2023]
Abstract
Bacteriophages have been suggested as alternative antimicrobial agents based on their host specificity and lytic activity. Therefore, it is necessary to obtain a virulent phage from a temperate one using molecular techniques to control Staphylococcus aureus efficiently. SA13, a novel temperate phage infecting S. aureus, was isolated and characterized. From this phage, mutant phages were generated by random deletion mutations, and a virulent mutant phage SA13m was selected. Comparative genome analysis revealed that the SA13m genome contains various nucleotide deletions in six genes encoding three hypothetical proteins and three lysogeny-associated proteins, including putative integrase, putative CI, and putative anti-repressor proteins. Mitomycin C induction of SA13m-resistant strains revealed that this mutant phage does not form lysogen, suggesting that SA13m is a virulent phage. In addition, SA13m showed rapid and long-lasting host cell growth inhibition activity. Furthermore, application of SA13m in sterilized milk showed that S. aureus was reduced to non-detectable levels both at refrigerator temperature (4 °C) and room temperature (25 °C), suggesting that SA13m can efficiently control the growth of S. aureus in foods. The virulent mutant phage SA13m could be used as a promising biocontrol agent against S. aureus without lysogen formation.
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Affiliation(s)
- Yoonjee Chang
- Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Research Institute of Agriculture and Life Sciences, and Center for Food and Bioconvergence, Seoul National University, Seoul, 08826, Republic of Korea
| | - Jaewoo Bai
- Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Research Institute of Agriculture and Life Sciences, and Center for Food and Bioconvergence, Seoul National University, Seoul, 08826, Republic of Korea
| | - Ju-Hoon Lee
- Department of Food Science and Biotechnology, Graduate School of Biotechnology, Kyung Hee University, Yongin, 17104, Republic of Korea.
| | - Sangryeol Ryu
- Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Research Institute of Agriculture and Life Sciences, and Center for Food and Bioconvergence, Seoul National University, Seoul, 08826, Republic of Korea.
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Molecular characterisation and biofilm production in Staphylococcusaureus isolates from the dairy production chain in Northern Italy. Int Dairy J 2019. [DOI: 10.1016/j.idairyj.2018.10.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Comprehensive Virulence Gene Profiling of Bovine Non- aureus Staphylococci Based on Whole-Genome Sequencing Data. mSystems 2019; 4:mSystems00098-18. [PMID: 30863792 PMCID: PMC6401416 DOI: 10.1128/msystems.00098-18] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 02/15/2019] [Indexed: 12/21/2022] Open
Abstract
Non-aureus staphylococci (NAS) are the most frequently isolated pathogens from milk in dairy cattle worldwide. The virulence factors (VFs) and mechanisms by which these bacteria cause udder infection are not fully known. We determined the distribution and associations of 191 VFs in 25 NAS species and investigated the relationship between VFs and disease. Although the overall number of VFs was not associated with disease severity, increasing numbers of toxin and host immune evasion genes specifically were associated with more severe disease outcomes. These findings suggest that the development of disease and the interactions of VFs with the host are complex and determined by the interplay of genes rather than just the presence of virulence genes. Together, our results provide foundational genetic knowledge to other researchers to design and conduct further experiments, focusing on understanding the synergy between VFs and roles of individual NAS species in IMI and characterizing species-specific effects on udder health. Non-aureus staphylococci (NAS) are the most frequently isolated pathogens from intramammary infection (IMI) in dairy cattle. Virulence factors (VFs) and mechanisms by which NAS cause IMI are not fully known. Herein, we analyzed the distribution of 191 VFs in 441 genomes of 25 NAS species, after classifying VFs into functional categories: adherence (n = 28), exoenzymes (n = 21), immune evasion (n = 20), iron metabolism (n = 29), and toxins (n = 93). In addition to establishing VF gene profiles, associations of VF genes between and among functional categories were computed, revealing distinctive patterns of association among VFs for various NAS species. Associations were also computed for low, medium, and high somatic cell count (SCC) and clinical mastitis (CM) isolates, demonstrating distinctive patterns of associations for low SCC and CM isolates, but no differences between high SCC and CM isolates. To determine whether VF distributions had any association with SCC or CM, various clustering approaches, including complete linkages, Ward clustering, and t-distributed stochastic neighbor embedding, were applied. However, no clustering of isolates representing low SCC, medium SCC, or high SCC or CM was identified. Regression analysis to test for associations with individual VF functional categories demonstrated that each additional toxin and host immune evasion gene increased the odds of having high SCC or CM, although an overall increase in the number of VFs was not associated with increased SCC or occurrence of CM. In conclusion, we established comprehensive VF gene profiling, determined VF gene distributions and associations, calculated pathogenic potentials of all NAS species, and detected no clear link between VF genes and mastitis. IMPORTANCE Non-aureus staphylococci (NAS) are the most frequently isolated pathogens from milk in dairy cattle worldwide. The virulence factors (VFs) and mechanisms by which these bacteria cause udder infection are not fully known. We determined the distribution and associations of 191 VFs in 25 NAS species and investigated the relationship between VFs and disease. Although the overall number of VFs was not associated with disease severity, increasing numbers of toxin and host immune evasion genes specifically were associated with more severe disease outcomes. These findings suggest that the development of disease and the interactions of VFs with the host are complex and determined by the interplay of genes rather than just the presence of virulence genes. Together, our results provide foundational genetic knowledge to other researchers to design and conduct further experiments, focusing on understanding the synergy between VFs and roles of individual NAS species in IMI and characterizing species-specific effects on udder health.
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50
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Bellio A, Chiesa F, Gallina S, Bianchi DM, Macori G, Bossi D, Nia Y, Mutel I, Messio S, Hennekinne JA, Decastelli L. Insight Into the Distribution of Staphylococci and Their Enterotoxins in Cheeses Under Natural Conditions. Front Microbiol 2019; 9:3233. [PMID: 30666242 PMCID: PMC6330353 DOI: 10.3389/fmicb.2018.03233] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 12/12/2018] [Indexed: 01/18/2023] Open
Abstract
Staphylococcal food poisoning outbreaks are a major cause of food-borne illness in the European Union and their notification has been mandatory since 2005. Criteria for the enumeration of coagulase-positive Staphylococci (CPS) and the detection of staphylococcal enterotoxins (SEs) in cheese have been set down in Commission Regulation EC 2073/2005. Currently, few information are available about the distribution of SEs in naturally contaminated cheeses, including raw-milk and artisanal dairy products. The aim of this study was therefore to investigate at both the CPS enumeration and the succession of the enterotoxigenic Staphylococcus aureus and produced enterotoxins levels on the rind and the core of a raw-milk semi-hard cheese, produced on farm. The study has been conducted in three steps: (I) seven wheels at different time of ripening where tested for the presence of SEs. (II) from each wheel, four portions were subsequently sampled from four different areas (peripheral rind, central rind, peripheral core and central core). (III) two cheese wheels, characterized by the highest and lowest CPS numbers and SEs quantification, based on the second step of the study, were further analyzed. A significant difference has been observed in the distribution of CPS and SEs in the four areas sampled, irrespectively of the batch and the time of ripening. The results of this study provided a set of previously unknown information on the influence of natural conditions on the distribution of CPS and SEs thereof in the cheese matrix, filling a gap in the understanding of SEs biosynthesis process.
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Affiliation(s)
- Alberto Bellio
- National Reference Laboratory for Coagulase Positive Staphylococci, Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Turin, Italy
| | - Francesco Chiesa
- Dipartimento di Medicina Veterinaria, Università degli Studi di Torino, Turin, Italy
| | - Silvia Gallina
- National Reference Laboratory for Coagulase Positive Staphylococci, Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Turin, Italy
| | - Daniela Manila Bianchi
- S.C. Controllo Alimenti e Igiene delle Produzioni, Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Turin, Italy
| | - Guerrino Macori
- S.C. Controllo Alimenti e Igiene delle Produzioni, Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Turin, Italy
| | - Dario Bossi
- Servizio Veterinario Asl VC, Vercelli, Italy
| | - Yacine Nia
- European Union Reference Laboratory for Coagulase Positive Staphylococci, Agence Nationale de Sécurité Sanitaire de l'Alimentation, de l'Environnement et du Travail, Maisons-Alfort, France
| | - Isabelle Mutel
- European Union Reference Laboratory for Coagulase Positive Staphylococci, Agence Nationale de Sécurité Sanitaire de l'Alimentation, de l'Environnement et du Travail, Maisons-Alfort, France
| | - Sabine Messio
- European Union Reference Laboratory for Coagulase Positive Staphylococci, Agence Nationale de Sécurité Sanitaire de l'Alimentation, de l'Environnement et du Travail, Maisons-Alfort, France
| | - Jacques-Antoine Hennekinne
- European Union Reference Laboratory for Coagulase Positive Staphylococci, Agence Nationale de Sécurité Sanitaire de l'Alimentation, de l'Environnement et du Travail, Maisons-Alfort, France
| | - Lucia Decastelli
- National Reference Laboratory for Coagulase Positive Staphylococci, Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Turin, Italy.,S.C. Controllo Alimenti e Igiene delle Produzioni, Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Turin, Italy
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