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Khairullah AR, Sudjarwo SA, Effendi MH, Ramandinianto SC, Gelolodo MA, Widodo A, Riwu KHP, Kurniawati DA. Review of pork and pork products as a source for transmission of methicillin-resistant Staphylococcus aureus. INTERNATIONAL JOURNAL OF ONE HEALTH 2022. [DOI: 10.14202/ijoh.2022.167-177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) is an opportunistic bacterium that can cause infection in animals and humans. Recently, MRSA from food-producing or farm animals has been identified as livestock-associated MRSA (LA-MRSA). The spread of LA-MRSA is particularly found in pork and pork products because LA-MRSA has been widely known to infect pigs. The most common type of LA-MRSA identified in pork and pork products is the clonal complex LA-MRSA 398 (LA-MRSA CC398). The MRSA strains on the surface of pork carcasses can be spread during the handling and processing of pork and pork products through human hands, cutting tools, and any surface that comes into direct contact with pork. Food infection is the main risk of MRSA in pork and pork products consumed by humans. Antibiotics to treat food infection cases due to MRSA infection include vancomycin and tigecycline. The spread of MRSA in pork and pork products is preventable by appropriately cooking and cooling the pork and pork products at temperatures above 60°C and below 5°C, respectively. It is also necessary to take other preventive measures, such as having a clean meat processing area and disinfecting the equipment used for processing pork and pork products. This review aimed to explain epidemiology, transmission, risk factors, diagnosis, public health consequences, treatment of food poisoning, and preventing the spread of MRSA in pork and pork products.
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Affiliation(s)
- Aswin Rafif Khairullah
- Doctoral Program in Veterinary Science, Faculty of Veterinary Medicine, Universitas Airlangga, Surabaya, Indonesia
| | - Sri Agus Sudjarwo
- Department of Veterinary Pharmacology, Faculty of Veterinary Medicine, Universitas Airlangga, Surabaya, Indonesia
| | - Mustofa Helmi Effendi
- Department of Veterinary Public Health, Faculty of Veterinary Medicine, Universitas Airlangga, Surabaya, Indonesia
| | - Sancaka Cashyer Ramandinianto
- Master Program in Veterinary Disease and Public Health, Faculty of Veterinary Medicine, Universitas Airlangga, Surabaya, Indonesia
| | - Maria Aega Gelolodo
- Department of Animal Infectious Diseases and Veterinary Public Health, Faculty of Medicine and Veterinary Medicine, Universitas Nusa Cendana, Kupang, Indonesia
| | - Agus Widodo
- Doctoral Program in Veterinary Science, Faculty of Veterinary Medicine, Universitas Airlangga, Surabaya, Indonesia
| | | | - Dyah Ayu Kurniawati
- Master Program in Veterinary Disease and Public Health, Faculty of Veterinary Medicine, Universitas Airlangga, Surabaya, Indonesia
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Guran HS, Bozan Bayrak AR, Alali W, Yesiloglu C. Prevalence and antimicrobial susceptibility pattern of methicillin-resistant Staphylococcus aureus isolates from retail raw meats in Turkey. INTERNATIONAL FOOD RESEARCH JOURNAL 2022. [DOI: 10.47836/ifrj.29.5.11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The transmission of Staphylococcus aureus and methicillin-resistant S. aureus (MRSA) through food products of animal origin may pose a public health concern. Therefore, the objectives of the present work were to determine the prevalence of S. aureus and MRSA in raw meat samples (beef, chicken, turkey, and duck) at retail level, and to determine the antimicrobial resistance profile of the MRSA isolates. Between September 2018 and January 2019, a total of 325 raw meat samples were collected from retail stores, and analysed for the presence of S. aureus and MRSA using primary enrichment method as well as using secondary selective enrichment methods for MRSA detection. All the suspected S. aureus and MRSA colonies obtained from the samples were confirmed by both phenotypic and genotypic methods. The MRSA isolates were tested against various antimicrobials, and the minimal inhibitory concentration (MIC) of vancomycin was determined. Macrolide-lincosamide-streptogramin B (MLSB) resistance phenotypes were also screened using the double-disk diffusion test. The overall prevalence of S. aureus was 57.2%, whereas the food-specific prevalence in beef, turkey, duck, and chicken samples was 75, 53, 48, and 46%, respectively. The overall prevalence of MRSA was 1.2%, whereas it was 3, 1, 0, and 0% in beef, turkey, chicken, and duck samples, respectively. All MRSA isolates were detected by the secondary selective enrichment method. These MRSA isolates had a variety of MLSB resistance phenotypes (i.e., iMLSB, cMLSB, and MS-MLSB) with vancomycin MIC values ranging between 1 - 2 µg/mL. These findings are important for developing interventions to reduce raw meat contamination with S. aureus and MRSA, and to improve public health.
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Achek R, El-Adawy H, Hotzel H, Hendam A, Tomaso H, Ehricht R, Neubauer H, Nabi I, Hamdi TM, Monecke S. Molecular Characterization of Staphylococcus aureus Isolated from Human and Food Samples in Northern Algeria. Pathogens 2021; 10:pathogens10101276. [PMID: 34684225 PMCID: PMC8537606 DOI: 10.3390/pathogens10101276] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 09/23/2021] [Accepted: 09/28/2021] [Indexed: 01/04/2023] Open
Abstract
Staphylococcus aureus is a commensal resident of the skin and nasal cavities of humans and can cause various infections. Some toxigenic strains can contaminate food matrices and cause foodborne intoxications. The present study aimed to provide relevant information (clonal complex lineages, agr types, virulence and antimicrobial resistance-associated genes) based on DNA microarray analyses as well as the origins and dissemination of several circulating clones of 60 Staphylococcus aureus isolated from food matrices (n = 24), clinical samples (n = 20), and nasal carriers (n = 16) in northern Algeria. Staphylococcus aureus were genotyped into 14 different clonal complexes. Out of 60 S. aureus, 13 and 10 isolates belonged to CC1-MSSA and CC97-MSSA, respectively. The CC 80-MRSA-IV was the predominant S. aureus strain in clinical isolates. The accessory gene regulator allele agr group III was mainly found among clinical isolates (70.4%). Panton–Valentine leukocidin genes lukF/lukS-PV were detected in 13.3% of isolates that all belonged to CC80-MRSA. The lukF/S-hlg, hlgA, and hla genes encoding for hemolysins and leucocidin components were detected in all Staphylococcusaureus isolates. Clinical and food isolates harbored more often the antibiotic resistance genes markers. Seventeen (28.3%) methicillin-resistant Staphylococcus aureus carrying the mecA gene localized on a SCCmec type IV element were identified. The penicillinase operon (blaZ/I/R) was found in 71.7% (43/60) of isolates. Food isolates belonging to CC97-MSSA carried several antibiotic resistance genes (blaZ, ermB, aphA3, sat, tetM, and tetK). The results of this study showed that all clones were found in their typical host, but interestingly, some nasal carriers had isolates assigned to CC705 thought to be absent in humans. The detection of MRSA strains among food isolates should be considered as a potential public health risk. Therefore, controlling the antibiotics prescription for a rational use in human and animal infections is mandatory.
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Affiliation(s)
- Rachid Achek
- Faculty of Nature and Life and Earth Sciences, Djilali-Bounaama University, Soufay, Khemis-Miliana 44225, Algeria;
- Laboratory of Food Hygiene and Quality Assurance System, High National Veterinary School, Oued Smar, Algiers 16059, Algeria;
| | - Hosny El-Adawy
- Institute of Bacterial Infections and Zoonoses, Friedrich-Loeffler-Institut, 07743 Jena, Germany; (H.H.); (H.T.); (H.N.)
- Faculty of Veterinary Medicine, Kafrelsheikh University, Kafr El-Sheikh 35516, Egypt
- Correspondence:
| | - Helmut Hotzel
- Institute of Bacterial Infections and Zoonoses, Friedrich-Loeffler-Institut, 07743 Jena, Germany; (H.H.); (H.T.); (H.N.)
| | - Ashraf Hendam
- Climate Change Information Center, Renewable Energy and Expert Systems (CCICREES), Agricultural Research Center, 9 Algamaa Street, Giza 12619, Egypt;
| | - Herbert Tomaso
- Institute of Bacterial Infections and Zoonoses, Friedrich-Loeffler-Institut, 07743 Jena, Germany; (H.H.); (H.T.); (H.N.)
| | - Ralf Ehricht
- Leibniz Institute of Photonic Technology (IPHT), 07745 Jena, Germany; (R.E.); (S.M.)
- InfectoGnostics Research Campus Jena e. V., 07743 Jena, Germany
- Institute of Physical Chemistry, Friedrich Schiller University Jena, 07743 Jena, Germany
| | - Heinrich Neubauer
- Institute of Bacterial Infections and Zoonoses, Friedrich-Loeffler-Institut, 07743 Jena, Germany; (H.H.); (H.T.); (H.N.)
| | - Ibrahim Nabi
- Faculty of Sciences, Yahia Farès University, Urban Pole, Médéa 26000, Algeria;
| | - Taha Mossadak Hamdi
- Laboratory of Food Hygiene and Quality Assurance System, High National Veterinary School, Oued Smar, Algiers 16059, Algeria;
| | - Stefan Monecke
- Leibniz Institute of Photonic Technology (IPHT), 07745 Jena, Germany; (R.E.); (S.M.)
- InfectoGnostics Research Campus Jena e. V., 07743 Jena, Germany
- Institute for Medical Microbiology and Virology, Dresden University Hospital, 01307 Dresden, Germany
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Martínez-Vázquez AV, Guardiola-Avila IB, Flores-Magallón R, Rivera G, Bocanegra-García V. Detection of multi-drug resistance and methicillin-resistant Staphylococcus aureus (MRSA) isolates from retail meat in Tamaulipas, Mexico. ANN MICROBIOL 2021. [DOI: 10.1186/s13213-021-01627-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Purpose
Among the principal microorganisms transmitted to humans by foods of animal origin, Staphylococcus aureus stands out, causing a variety of diseases and with a wide potential for acquiring antimicrobial resistance. This work aimed to determine the prevalence of S. aureus, its multi-drug resistance (MDRSA), and the identification of methicillin-resistant Staphylococcus aureus (MRSA) in retail beef and pork in the state of Tamaulipas, Mexico.
Methods
S. aureus strains isolated from retail meat were characterized by microbiological and molecular methods to determine phenotypic drug-resistance and detect MRSA strains.
Results
Of the 106 samples (54 from beef and 52 from pork) from 11 different cities, we detected a prevalence of S. aureus of 44.3% (47/106). A total of 87 S. aureus strains were identified; these presented 54 resistance patterns to different antimicrobials with a high prevalence of MDRSA (85%) and a low prevalence of MRSA strains (3%).
Conclusion
These results indicate the presence of MDRSA and MRSA in retail beef and pork in Tamaulipas, representing a high risk for consumer health.
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Ansari A, Ibrahim F, Pervez S, Aman A. Inhibitory mechanism of BAC-IB17 against β-lactamase mediated resistance in methicillin-resistant Staphylococcus aureus and application as an oncolytic agent. Microb Pathog 2020; 149:104499. [PMID: 32956794 DOI: 10.1016/j.micpath.2020.104499] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 09/08/2020] [Accepted: 09/09/2020] [Indexed: 10/23/2022]
Abstract
Cancer remains a foremost cause of deaths worldwide, despite several advances in the medical science. The conventional chemotherapeutic methods are not only harmful for normal body cells but also become inactive due to the development of resistance by cancer cells. Therefore, the demand of safe anticancer agents is increasing and enforced the bottomless research on the bacteriocins. Several studies have reported the selective anticancer property of bacteriocins. Current research is the contribution to explore the exact mechanism of action and in vitro application of bacteriocin (BAC-IB17) as an oncolytic agent. In this study, β-lactamase mediated resistance of methicillin resistant Staphylococcus aureus (MRSA) was studied and inhibitory mechanism of MRSA by BAC-IB17 was investigated. Cytotoxic studies were conducted to analyze the anticancerous potential of BAC-IB17. Results revealed that BAC-IB17 inhibited the β-lactamase and produced profound effect on the membrane integrity of MRSA confirmed by scanning electron microscope (SEM). FTIR spectroscopic analysis revealed the changes in the functional groups of bacterial cells before and after treatment with BAC-IB17. BAC-IB17 also found anticancer in nature as it kills HeLa cell lines with the IC50 value of 12.5 μg mL-1 with no cytotoxic effect on normal cells at this concentration. This specific anticancer property of BAC-IB17 will make it a promising candidate for the treatment of cancer after further clinical trials. Moreover, BAC-IB17 may control MDR bacteria responsible for the secondary complications in cancer patients.
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Affiliation(s)
- Asma Ansari
- The Karachi Institute of Biotechnology & Genetic Engineering (KIBGE), University of Karachi, Karachi, 75270, Pakistan.
| | - Fariha Ibrahim
- The Karachi Institute of Biotechnology & Genetic Engineering (KIBGE), University of Karachi, Karachi, 75270, Pakistan
| | - Sidra Pervez
- Department of Biochemistry, Shaheed Benazir Bhutto Women University, Peshawar, Pakistan
| | - Afsheen Aman
- The Karachi Institute of Biotechnology & Genetic Engineering (KIBGE), University of Karachi, Karachi, 75270, Pakistan
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6
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Aljahani A, Alarjani K, Hassan Z, Elkhadragy M, Ismail E, Al-Masoud A, Yehia H. Molecular detection of methicillin heat-resistant Staphylococcus aureus strains in pasteurized camel milk in Saudi Arabia. Biosci Rep 2020; 40:BSR20193470. [PMID: 32202302 PMCID: PMC7167254 DOI: 10.1042/bsr20193470] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 03/12/2020] [Accepted: 03/19/2020] [Indexed: 11/17/2022] Open
Abstract
Antibiotic- and heat-resistant bacteria in camel milk is a potential public health problem. Staphylococcus aureus (S. aureus) is an opportunistic pathogen in humans, dairy cattle and camels. We characterized the phenotype and genotype of methicillin-resistant staphylococcal strains recovered from pasteurized and raw camel milk (as control) distributed in the retail markets of Saudi Arabia. Of the 100 samples assessed between March and May 2016, 20 S. aureus isolates were recovered from pasteurized milk, 10 of which were resistant to cefoxitin, and as such, were methicillin-resistant. However, raw camel milk did not contain methicillin-resistant S. aureus (MRSA). Antimicrobial susceptibility tests showed that the resistance ratio for other antibiotics was 60%. We performed a polymerase chain reaction (PCR) assay using primers for the methicillin-resistant gene mecA and nucleotide sequencing to detect and verify the methicillin-resistant strains. Basic local alignment search tool (BLAST) analysis of the gene sequences showed a 96-100% similarity between the resistant isolates and the S. aureus CS100 strain's mecA gene. Ten of the methicillin-resistant isolates were heat-resistant and were stable at temperatures up to 85°C for 60 s, and three of these were resistant at 90°C for 60 or 90 s. The mean decimal reduction time (D85-value) was 111 s for the ten isolates. Sodium dodecyl sulfate (SDS)/polyacrylamide gel electrophoresis (PAGE) showed that there was no difference in the total protein profiles for the ten methicillin heat-resistant S. aureus (MHRSA) isolates and for S. aureus ATCC 29737. In conclusion, a relatively high percentage of the tested pasteurized camel milk samples contained S. aureus (20%) and MHRSA (10%).
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Affiliation(s)
- Amani H. Aljahani
- Department of Physical Sport Science, Nutrition and Food Science, Princess Nourah Bint Abdulrahman University, Saudi Arabia
| | - Khaloud M. Alarjani
- Department of Botany and Microbiology, College of Science, King Saud University, Saudi Arabia
| | - Zeinab K. Hassan
- Cancer Biology Department, Virology and Immunolgy Unit, National Cancer Institute, Cairo University, Egypt
| | - Manal F. Elkhadragy
- Biology Department, Faculty of Science, Princess Nourah bint Abdulrahman University, Riyadh 11671, Saudi Arabia
- Zoology Department, Faculty of Science, Helwan University, Cairo 11790, Egypt
| | - Elsayed A. Ismail
- Department of Dairy Science, Faculty of Agriculture, Benha University, Benha 13518, Egypt
| | - Abdulrahman H. Al-Masoud
- Food Science and Nutrition Department, College of Food and Agricultural Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Hany M. Yehia
- Food Science and Nutrition Department, College of Food and Agricultural Sciences, King Saud University, Riyadh, Saudi Arabia
- Food Science and Nutrition Department, Faculty of Home Economics, Helwan University, Cairo, Egypt
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7
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Yehia HM, Al-Masoud AH, Alarjani KM, Alamri MS. Prevalence of methicillin-resistant (mecA gene) and heat-resistant Staphylococcus aureus strains in pasteurized camel milk. J Dairy Sci 2020; 103:5947-5963. [PMID: 32359985 DOI: 10.3168/jds.2019-17631] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Accepted: 03/02/2020] [Indexed: 12/20/2022]
Abstract
Staphylococcus aureus is a significant opportunistic pathogen in humans, dairy cattle, and camels. The presence of antibiotic-resistant and heat-resistant bacteria in camel milk has become a potential public health issue. The phenotypic and molecular characterization of methicillin-resistant staphylococcal strains recovered from pasteurized camel milk distributed in retail markets of Saudi Arabia was assessed. A total of 100 samples were collected between March and May 2017. Out of the 20 S. aureus isolates that were recovered from the pasteurized camel milk, 10 were found to be resistant to cefoxitin (30 µg) and, thus, were designated as methicillin-resistant strains. The resistance ratio of methicillin-resistant S. aureus isolates for a different class of antibiotics was determined by performing the antimicrobial susceptibility test and was estimated to be approximately 60%. Polymerase chain reaction assay was performed to amplify the methicillin-resistant gene mecA, and furthermore, nucleotide sequencing was performed to detect and verify the presence of methicillin-resistant strains. Upon sequencing the putative S. aureus methicillin-resistant strains, we obtained 96 to 100% similarity to the penicillin-binding protein 2a gene (mecA) of the S. aureus strain CS100. Moreover, the 10 methicillin-resistant S. aureus isolates were also identified to be heat resistant and were stable at temperatures up to 85°C for 60 s, with 3 isolates being heat resistant even at 90°C for 60 or 90 s. The mean decimal reduction time (D85 value) was 111 s for all the 10 isolates. No difference was observed in the profile of total protein between the 10 methicillin- and heat-resistant S. aureus isolates and the S. aureus strain ATCC 29737, which was determined by sodium dodecyl sulfate-PAGE analyses. Therefore, we could conclude that a relatively high percentage of the tested pasteurized camel milk samples were contaminated with S. aureus (20%) and methicillin- and heat-resistant S. aureus (10%).
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Affiliation(s)
- Hany M Yehia
- Food Science and Nutrition Department, College of Food and Agricultural Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia; Food Science and Nutrition Department, Faculty of Home Economics, Helwan University, P.O. Box 11611, Cairo, Egypt.
| | - Abdulrahman H Al-Masoud
- Food Science and Nutrition Department, College of Food and Agricultural Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia
| | - Khaloud M Alarjani
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Mohamed S Alamri
- Food Science and Nutrition Department, College of Food and Agricultural Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia
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Pang R, Wu S, Zhang F, Huang J, Wu H, Zhang J, Li Y, Ding Y, Zhang J, Chen M, Wei X, Zhang Y, Gu Q, Zhou Z, Liang B, Li W, Wu Q. The Genomic Context for the Evolution and Transmission of Community-Associated Staphylococcus aureus ST59 Through the Food Chain. Front Microbiol 2020; 11:422. [PMID: 32256477 PMCID: PMC7090029 DOI: 10.3389/fmicb.2020.00422] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Accepted: 02/27/2020] [Indexed: 12/16/2022] Open
Abstract
Sequence type 59 (ST59) is a predominant clonal lineage of community-acquired, methicillin-resistant Staphylococcus aureus (CA-MRSA) in Asia. Despite its increasing clinical relevance in China, the evolution and geographic expansion of ST59 has been relatively uncared for. Previous study has shown that ST59 was the predominant clone in food-related MRSA in China. This study compared the genomes of 87 clonal complex (CC) 59 S. aureus isolates sourced from food chain and infection cases to reconstruct the molecular evolution and geographical spread of ST59. Accordingly, three major sub-clades of ST59 were identified and these did not correlate with isolation source or location. Phylogenetic analysis estimated that ST59 in mainland China diverged from a most common recent ancestor around 1974, and most of the cases of cross-country transmission occurred between 1987 and 2000. Notably, two recent events of cross-country transmission through the food chain were observed, the isolates from these events diverged within relatively short time intervals. These isolates also showed high similarity in terms of their core genome, accessory genes, and antibiotic resistance patterns. These findings provide a valuable insight into the potential route of ST59 expansion in China and indicate a need for robust food chain surveillance to prevent the spread of this pathogen.
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Affiliation(s)
- Rui Pang
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Shi Wu
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Feng Zhang
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Jiahui Huang
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Haoming Wu
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Junhui Zhang
- Department of Food Science and Technology, Jinan University, Guangzhou, China
| | - Yanping Li
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Yu Ding
- Department of Food Science and Technology, Jinan University, Guangzhou, China
| | - Jumei Zhang
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Moutong Chen
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Xianhu Wei
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Youxiong Zhang
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Qihui Gu
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Zhenwen Zhou
- Clinical Laboratory, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Bingshao Liang
- Clinical Laboratory, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Wenzhi Li
- Infinitus (China) Company Ltd., Jiangmen, China
| | - Qingping Wu
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
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9
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Plaza‐Rodríguez C, Kaesbohrer A, Tenhagen B. Probabilistic model for the estimation of the consumer exposure to methicillin-resistant Staphylococcus aureus due to cross-contamination and recontamination. Microbiologyopen 2019; 8:e900. [PMID: 31328433 PMCID: PMC6854851 DOI: 10.1002/mbo3.900] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 06/11/2019] [Accepted: 06/11/2019] [Indexed: 11/10/2022] Open
Abstract
The presence of multidrug-resistant bacteria like methicillin-resistant Staphylococcus aureus (MRSA) in retail meat is one of the current concerns of the public health authorities. Bacterial cross-contamination and recontamination during household food preparation could play an important role in the dissemination of such bacteria, and therefore could contribute to a serious health problem, more specifically for immunocompromised people. In order to evaluate the importance of such events, a probabilistic model was developed to estimate the likelihood and extent of cross-contamination and recontamination and the burden of MRSA from contaminated raw chicken meat via hands and kitchen utensils in a serving (consisting on a slice of bread and a piece of grilled chicken meat) during a household barbecue in Germany. A modular design was used, taking into account the chronological order of the routines during the barbecue event, and Monte Carlo simulations were applied. Available data on the prevalence and burden of MRSA in chicken meat at retail in Germany were used as starting point and were incorporated in the model as probability distributions. The probabilities and extent of bacterial transfer between food items and kitchen utensils (referred to as "Objects") and the routines performed during food preparation (referred to as "Actions") specified by their probabilities of occurrence were incorporated as the main input parameters. The model was set up in R 3.5.0 and converted to a standardized format (FSKX file). Therefore, the code can be easily accessed, evaluated, modified, and reused for different purposes. The present study contributes to the quantification of consumer exposure to MRSA through food consumption once contaminated food has entered the household kitchen. Even when the MRSA prevalence and bacterial load in retail chicken meat in Germany are low, resistant bacteria can reach the consumer due to cross-contamination and recontamination events. The results show that the probability of one CFU to be transferred from the contaminated raw chicken meat to the final serving and the number of MRSA bacteria transferred due to cross-contamination and recontamination events are in general low, being the contamination of the final serving more likely to occur via bread, rather than via grilled chicken. The results show that the prevalence of MRSA at retail highly influences the probability of the final serving to be contaminated. However, this study also highlights the importance of keeping good hygiene practices during the household food manipulation for reducing the spread of MRSA. The provision of the model in a standardized data format will allow an easy incorporation of the developed model into a complete quantitative microbial risk assessment model that will greatly help to estimate the risk of consumer exposure to MRSA through the consumption of contaminated food.
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Affiliation(s)
| | - Annemarie Kaesbohrer
- Department‐Biological SafetyGerman Federal Institute for Risk Assessment (BfR)BerlinGermany
| | - Bernd‐Alois Tenhagen
- Department‐Biological SafetyGerman Federal Institute for Risk Assessment (BfR)BerlinGermany
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10
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Wan TW, Teng LJ, Yamamoto T. Structures of a highly variable cell-wall anchored protein-encoding the spj gene from ST8/SCCmecIVl community-associated methicillin-resistant Staphylococcus aureus (CA-MRSA/J) isolated from 2003 onwards: An indicator of a strongly invasive pathotype. Microbiol Immunol 2019; 63:186-193. [PMID: 31009089 PMCID: PMC6617794 DOI: 10.1111/1348-0421.12684] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 04/03/2019] [Accepted: 04/15/2019] [Indexed: 12/15/2022]
Abstract
The cell wall‐anchored protein‐encoding spj gene on staphylococcal cassette chromosome mec IVl (SCCmecIVl) was found to vary in size because of its 22‐ and 86‐aa repeat domains. The 22‐aa repeats are the more flexible of the two repeats, comprising three 11‐aa units, and were classified into three groups with eleven types. The 11/22‐aa repeats are longer in individuals with bullous impetigo, shorter in those with invasive disease and were absent in a fatal case, this last one having been rapidly diagnosed by PCR. IS431‐flanking pUB110 (bleO, aadD) is present on SCCmecIVl at 90%. The bacterial surface has the spj product and a unique surface layer.
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Affiliation(s)
- Tsai-Wen Wan
- Department of Epidemiology, Genomics, and Evolution, International Medical Education and Research Center, Niigata, Japan.,Laboratory Sciences and Medical Biotechnology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Lee-Jene Teng
- Laboratory Sciences and Medical Biotechnology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Tatsuo Yamamoto
- Department of Epidemiology, Genomics, and Evolution, International Medical Education and Research Center, Niigata, Japan
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11
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Rodríguez-Lázaro D, Alonso-Calleja C, Oniciuc EA, Capita R, Gallego D, González-Machado C, Wagner M, Barbu V, Eiros-Bouza JM, Nicolau AI, Hernández M. Characterization of Biofilms Formed by Foodborne Methicillin-Resistant Staphylococcus aureus. Front Microbiol 2018; 9:3004. [PMID: 30564226 PMCID: PMC6288681 DOI: 10.3389/fmicb.2018.03004] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 11/20/2018] [Indexed: 12/21/2022] Open
Abstract
The objective of this study was to evaluate the capacity of 49 methicillin resistant Staphylococcus aureus (MRSA) from foods of animal origin (42 from dairy products and 7 from meat and meat products) to form biofilms. Overall, a higher biofilm biomass was observed for those MRSA strains harboring SCCmec type IV, while 8 MRSA strains (5 from dairy products and 3 from meat and meat products) were classified as strong biofilm formers in standard Tryptic Soy Broth medium. When a prolonged incubation period (48 h) was applied for those 8 MRSA strains, an increased biofilm biomass accumulation was observed during the time course, whereas the number of viable cells within the biofilms decreased as the biomass increased. The capacity of biofilm production correlated pretty well between the experiments using polystyrene microtiter plates and stainless steel micro-well plates, and significant higher values were observed in stainless steel when glucose was added to TSB during the enrichment. Biofilms were further characterized by confocal laser scanning microscope (CLSM), confirming that proteins and α-polysaccharides were the predominant components inside the extracellular polymeric matrix of biofilms formed by MRSA strains. In conclusion, our results confirm that MRSA isolates from foods of animal origin have significant capacity for forming biofilms with a high protein content, which can play a key role for the successful dissemination of MRSA lineages via food. Knowledge of the capacity of MRSA strains to produce biofilms, as well as characterization of the main MRSA biofilms matrix components, can help both to counteract the mechanisms involved in biofilm formation and resistance and to define more rational control strategies by using tailor-made cleaning agents.
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Affiliation(s)
- David Rodríguez-Lázaro
- Microbiology Division, Department of Food Science and Biotechnology, Faculty of Science, University of Burgos, Burgos, Spain
| | - Carlos Alonso-Calleja
- Department of Food Hygiene and Technology, Veterinary Faculty, University of León, León, Spain.,Institute of Food Science and Technology, University of León, León, Spain
| | - Elena Alexandra Oniciuc
- Faculty of Food Science and Engineering, Dunarea de Jos University of Galati, Galati, Romania
| | - Rosa Capita
- Department of Food Hygiene and Technology, Veterinary Faculty, University of León, León, Spain.,Institute of Food Science and Technology, University of León, León, Spain
| | - David Gallego
- Dependencia de Sanidad de Vizcaya, Delegación del Gobierno en el País Vasco, Bilbao, Spain
| | - Camino González-Machado
- Department of Food Hygiene and Technology, Veterinary Faculty, University of León, León, Spain.,Institute of Food Science and Technology, University of León, León, Spain
| | - Martin Wagner
- Institute for Milk Hygiene, Milk Technology and Food Science, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Vasilica Barbu
- Faculty of Food Science and Engineering, Dunarea de Jos University of Galati, Galati, Romania
| | | | - Anca I Nicolau
- Faculty of Food Science and Engineering, Dunarea de Jos University of Galati, Galati, Romania
| | - Marta Hernández
- Microbiology Division, Department of Food Science and Biotechnology, Faculty of Science, University of Burgos, Burgos, Spain.,Laboratory of Molecular Biology and Microbiology, Instituto Tecnológico Agrario de Castilla y León, Valladolid, Spain
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12
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Ansari A, Zohra RR, Tarar OM, Qader SAU, Aman A. Screening, purification and characterization of thermostable, protease resistant Bacteriocin active against methicillin resistant Staphylococcus aureus (MRSA). BMC Microbiol 2018; 18:192. [PMID: 30466388 PMCID: PMC6251144 DOI: 10.1186/s12866-018-1337-y] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Accepted: 11/13/2018] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND The emergence of serious issues of multidrug resistance in the past few years have enforced the use of bacteriocins for combating infections. Threat posed to public health by various multidrug resistant (MDR) organisms can be resolved by discovering new antimicrobial proteins with broad spectrum of inhibition. RESULTS In the current study, Bacteriocin (BAC-IB17) produced by Bacillus subtilis KIBGE-IB17 is found to be effective against different strains of methicillin resistant Staphylococcus aureus (MRSA). The approximate molecular mass of BAC-IB17 is 10.7 kDa. This unique bacteriocin is found to be highly thermostable and pH stable in nature. It also showed its stability against various heavy metals, organic solvents, surfactants and proteolytic enzymes. Amino acid profile of BAC-IB17 clearly showed that this protein mainly consists of non-polar and basic amino acids whereas; some acidic amino acids were also detected. Sequence of first 15 amino acid residues obtained from N-terminal sequencing of BAC-IB17 were NKPEALVDYTGVXNS. CONCLUSIONS The anti-MRSA property of purified bacteriocin may be used to prevent the spread of MRSA infections. Remarkable features of BAC-IB17 suggests its applications in various pharmaceutical and food industries as it can function under a variety of harsh environmental conditions.
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Affiliation(s)
- Asma Ansari
- The Karachi Institute of Biotechnology & Genetic Engineering (KIBGE)University of Karachi, 75270, Karachi, Pakistan.
| | | | - Omer Mukhtar Tarar
- Food and Marine Resources Research Centre, Pakistan Council of Scientific & Industrial Research (PCSIR), Laboratories Complex Karachi, 75280, Karachi, Pakistan
| | - Shah Ali Ul Qader
- Department of Biochemistry, University of Karachi, 75270, Karachi, Pakistan
| | - Afsheen Aman
- The Karachi Institute of Biotechnology & Genetic Engineering (KIBGE)University of Karachi, 75270, Karachi, Pakistan
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13
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Zehra A, Gulzar M, Singh R, Kaur S, Gill JPS. Prevalence, multidrug resistance and molecular typing of methicillin-resistant Staphylococcus aureus (MRSA) in retail meat from Punjab, India. J Glob Antimicrob Resist 2018; 16:152-158. [PMID: 30312831 DOI: 10.1016/j.jgar.2018.10.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 08/28/2018] [Accepted: 10/02/2018] [Indexed: 10/28/2022] Open
Abstract
OBJECTIVES This study reports the prevalence of methicillin-resistant Staphylococcus aureus (MRSA) in retail meat from Punjab, India. METHODS Classical microbiological methods were applied to isolate and identify S. aureus isolates. Isolates also underwent Etest. PCR and sequencing were used to identify and characterise antimicrobial resistance genes. MLST, SCCmec and spa typing were performed. RESULTS A total of 408 meat and 101 swab samples were processed for S. aureus isolation. Phenotypic resistance was highest to penicillin (90.97%), followed by ciprofloxacin (61.80%), tetracycline (45.14%) and erythromycin (11.11%). Isolates from chicken samples showed significantly higher MICs for tetracycline than chevon and pork samples and significantly higher MICs for trimethoprim/sulfamethoxazole and gentamicin than chevon and swab samples (P<0.05). No isolates were phenotypically resistant to vancomycin (MICs of 0.5-2μg/mL). Most isolates (52.78%, 95% CI 44.63-60.93%) were multidrug-resistant and carried resistance genes to penicillin (blaZ), oxacillin (mecA), gentamicin (aacA-aphD), erythromycin (ermB, ermC) and tetracycline (tetK, tetL, tetM). MRSA was only found in chicken samples (2.72%; 4/147). Seven S. aureus (5.07%) were borderline oxacillin-resistant (MIC range 4-8μg/mL). All MRSA were SCCmecV-pvl+-t442, among which three isolates were ST5. Their genotype was mecA+, blaZ+, aacA-aphD+, tetK+, ermC+/-. Among the erythromycin-resistant isolates, 25% were MRSA, of which 12.5% isolates expressed an inducible macrolide-lincosamide-streptogramin B (iMLSB) phenotype. CONCLUSION These data confirm the presence of ST5-t442-MRSA-SCCmecV-pvl+ and iMLSB MRSA in meat samples, indicating a potential role of meat in the dissemination of multidrug-resistant S. aureus strains and successful MRSA lineages in Punjab.
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Affiliation(s)
- Asima Zehra
- School of Public Health and Zoonoses, Guru Angad Dev Veterinary and Animal Sciences University (GADVASU), Ludhiana, Punjab, India.
| | - Maliha Gulzar
- Sheri-Kashmir University of Agricultural Sciences and Technology (SKUAST), Kashmir, India
| | - Randhir Singh
- School of Public Health and Zoonoses, Guru Angad Dev Veterinary and Animal Sciences University (GADVASU), Ludhiana, Punjab, India
| | - Simranpreet Kaur
- School of Public Health and Zoonoses, Guru Angad Dev Veterinary and Animal Sciences University (GADVASU), Ludhiana, Punjab, India
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14
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Alves VF, Niño-Arias FC, Pitondo-Silva A, de Araújo Frazilio D, de Oliveira Gonçalves L, Chaul Toubas L, Sapateiro Torres IM, Oxaran V, Dittmann KK, De Martinis ECP. Molecular characterisation of Staphylococcus aureus from some artisanal Brazilian dairies. Int Dairy J 2018. [DOI: 10.1016/j.idairyj.2018.06.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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15
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Harada T, Taguchi M, Kawahara R, Kanki M, Kawatsu K. Prevalence and Antimicrobial Susceptibility of Bacterial Pathogens in Ready-to-Eat Foods Retailed in Osaka Prefecture, Japan. J Food Prot 2018; 81:1450-1458. [PMID: 30080122 DOI: 10.4315/0362-028x.jfp-18-035] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The potential human health risk of Japanese ready-to-eat (RTE) foods was investigated by determining the contamination by foodborne bacterial pathogens, the prevalence of opportunistic and nosocomial pathogens, and the antibiotic susceptibility of the isolates recovered from 96 samples of lightly pickled vegetables, 88 samples of Western-style desserts, and 98 samples of RTE fish and seafood products sold at retail in Osaka, Japan. Staphylococcus aureus, including isolates producing staphylococcal enterotoxin (SE), were isolated from six lightly pickled vegetable products, seven Western-style dessert products, and three RTE fish and seafood products. Of these isolates, one SEC-producing isolate from a cake was identified as community-acquired methicillin-resistant S. aureus, which was multilocus sequence type 8 and staphylococcal cassette chromosome mec type IV. Enterobacteriaceae species, including Escherichia coli, Klebsiella oxytoca, Klebsiella pneumoniae, Proteus mirabilis, Serratia marcescens, Citrobacter freundii-Citrobacter braakii, and/or the Enterobacter cloacae complex, were isolated from 92 (95.8%) of the lightly pickled vegetable products, 39 (44.3%) of the Western-style dessert products, and 74 (75.5%) of the RTE fish and seafood products. On the basis of the antimicrobial susceptibility profiles of the opportunistic and nosocomial Enterobacteriaceae pathogens, the third-generation cephalosporin, fosfomycin, and quinolone resistance determinants were investigated. We detected AmpC products of the CIT group and a qnrB9 product in 5 and 1 C. freundii-C. braakii isolates, respectively, and fosA gene products in 15 E. cloacae complex isolates. Because RTE foods are consumed without a heating process, the spread of bacterial pathogens from contaminated food to human consumers is possible. RTE foods must be handled using hygienic procedures from the processing steps to the table to reduce the prevalence of potentially pathogenic or pathogenic bacteria and to prevent bacterial growth.
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Affiliation(s)
- Tetsuya Harada
- Osaka Institute of Public Health, Nakamichi 1-3-69, Higashinari-ku, Osaka 537-0025, Japan
| | - Masumi Taguchi
- Osaka Institute of Public Health, Nakamichi 1-3-69, Higashinari-ku, Osaka 537-0025, Japan
| | - Ryuji Kawahara
- Osaka Institute of Public Health, Nakamichi 1-3-69, Higashinari-ku, Osaka 537-0025, Japan
| | - Masashi Kanki
- Osaka Institute of Public Health, Nakamichi 1-3-69, Higashinari-ku, Osaka 537-0025, Japan
| | - Kentaro Kawatsu
- Osaka Institute of Public Health, Nakamichi 1-3-69, Higashinari-ku, Osaka 537-0025, Japan
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16
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Sato T, Usui M, Konishi N, Kai A, Matsui H, Hanaki H, Tamura Y. Closely related methicillin-resistant Staphylococcus aureus isolates from retail meat, cows with mastitis, and humans in Japan. PLoS One 2017; 12:e0187319. [PMID: 29084288 PMCID: PMC5662215 DOI: 10.1371/journal.pone.0187319] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2017] [Accepted: 10/13/2017] [Indexed: 11/18/2022] Open
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) is a pervasive healthcare-acquired (HA) pathogen with recent emergence as a community-acquired (CA) pathogen. To elucidate whether meat mediates MRSA transmission between animals and humans in Japan, this study examined MRSA isolates from retail meat (n = 8), cows with mastitis (n = 7), and humans (HA-MRSA = 46 and CA-MRSA = 54) by molecular typing, virulence gene analyses, and antimicrobial susceptibility testing. MRSA isolates from retail meat were classified into sequence type (ST) 8/spa type t1767 (n = 4), ST8/t4133 (n = 1), ST59/t3385 (n = 1), ST88/t375 (n = 1), and ST509/t375 (n = 1). All seven MRSA isolates from cows with mastitis were ST8/t1767. 46 HA-MRSA were clonal complex (CC) 5, divided into t002 (n = 30), t045 (n = 12), and t7455 (n = 4). 54 CA-MRSA were classified into 6 different CCs: CC1 (n = 14), CC5 (n = 7), CC8 (n = 29), CC45 (n = 1), CC89 (n = 1), CC509 (n = 1), and into 16 different spa types including newly identified t17177, t17193, and t17194. The majority were CC8/t1767 (n = 16). CC of one CA-MRSA isolate (spa type t1767) was not classified. Among 41 CC8 MRSA (five from meat, seven from cows with mastitis, and 29 CA-MRSA), 14 ST8/SCCmec IVl isolates (three from meat, one from a cow with mastitis, and 10 CA-MRSA) had identical pulsed-field gel electrophoresis patterns and similar spa type (t1767, t4133, and t17177), and were typed as CA-MRSA/J (ST8/SCCmec IVl, positive for sec + sel + tst but negative for Panton–Valentine leukocidin and the arginine catabolic mobile element). These results suggest that there is a transmission cycle of CA-MRSA/J among meat, cows, and humans in Japan, although it is unclear whether the origin is cow.
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Affiliation(s)
- Tomomi Sato
- Laboratory of Food Microbiology and Food Safety, Department of Health and Environmental Sciences, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkaido, Japan
| | - Masaru Usui
- Laboratory of Food Microbiology and Food Safety, Department of Health and Environmental Sciences, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkaido, Japan
| | - Noriko Konishi
- Department of Microbiology, Tokyo Metropolitan Institute of Public Health, Shinjuku-ku, Tokyo, Japan
| | - Akemi Kai
- Department of Microbiology, Tokyo Medical University, Shinjuku-ku, Tokyo, Japan
| | - Hidehito Matsui
- Infection Control Research Center, Kitasato University, Minato-ku, Tokyo, Japan
| | - Hideaki Hanaki
- Infection Control Research Center, Kitasato University, Minato-ku, Tokyo, Japan
| | - Yutaka Tamura
- Laboratory of Food Microbiology and Food Safety, Department of Health and Environmental Sciences, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkaido, Japan
- * E-mail:
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17
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Assessing the potential for raw meat to influence human colonization with Staphylococcus aureus. Sci Rep 2017; 7:10848. [PMID: 28883621 PMCID: PMC5589955 DOI: 10.1038/s41598-017-11423-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Accepted: 08/24/2017] [Indexed: 11/08/2022] Open
Abstract
The role of household meat handling and consumption in the transfer of Staphylococcus aureus (S. aureus) from livestock to consumers is not well understood. Examining the similarity of S. aureus colonizing humans and S. aureus in meat from the stores in which those individuals shop can provide insight into the role of meat in human S. aureus colonization. S. aureus isolates were collected from individuals in rural and urban communities in Iowa (n = 3347) and contemporaneously from meat products in stores where participants report purchasing meat (n = 913). The staphylococcal protein A (spa) gene was sequenced for all isolates to determine a spa type. Morisita indices and Permutational Multivariate Analysis of Variance Using Distance Matrices (PERMANOVA) were used to determine the relationship between spa type composition among human samples and meat samples. spa type composition was significantly different between households and meat sampled from their associated grocery stores. spa types found in meat were not significantly different regardless of the store or county in which they were sampled. spa types in people also exhibit high similarity regardless of residential location in urban or rural counties. Such findings suggest meat is not an important source of S. aureus colonization in shoppers.
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18
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Rodríguez-Lázaro D, Oniciuc EA, García PG, Gallego D, Fernández-Natal I, Dominguez-Gil M, Eiros-Bouza JM, Wagner M, Nicolau AI, Hernández M. Detection and Characterization of Staphylococcus aureus and Methicillin-Resistant S. aureus in Foods Confiscated in EU Borders. Front Microbiol 2017; 8:1344. [PMID: 28785245 PMCID: PMC5519621 DOI: 10.3389/fmicb.2017.01344] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Accepted: 07/03/2017] [Indexed: 11/22/2022] Open
Abstract
The aim of the study was to evaluate the potential role of the illegal entry of food in UE in the Methicillin-resistant S. aureus (MRSA) spread. We studied the prevalence and characteristics of Staphylococcus aureus and MRSA isolated from foods of animal origin confiscated from passengers on flights from 45 non-EU countries from 2012 to 2015 by the Border Authorities at Bilbao International Airport (Spain) and Vienna International Airport (Austria), as well as foods from open markets close to EU land borders. Of 868 food samples tested (diverse meat samples including antelope, duck, guinea pig, pork, rodents, turkey, dairy products, and eggs), 136 (15.7%) were positive for S. aureus and 26 (3.0%) for MRSA. All MRSA strains were mecA-positive. The prevalence of S. aureus-positive dairy samples among food confiscated at Bilbao International Airport was 64.6%, and this airport also had the highest value (11.8%) for MRSA-positive samples. The predominant sequence type was ST5 (30.8%), followed by ST8, ST1649, ST1, and other lineages were found to a lesser extent (ST7, ST22, ST72, ST97, and ST398). Six isolates tested positive for luk-PVL genes (SCCmec IV subtypes IVc and IVe). Enterotoxin profiling revealed that 19 MRSA strains were enterotoxigenic, harboring one or more se genes. The MRSA isolates positive for luk-PVL genes were not enterotoxigenic, and none of the isolates tested positive for enterotoxin E. We found 14 resistance profiles, and more than 69% of the MRSA isolates were resistant to three or more types of antimicrobial agents. This finding reveals both the wide diversity of the antimicrobial resistance found in the strains and the capacity to resist not only to beta-lactam drugs. One MRSA strain showed unusual characteristics: it was oxacillin-susceptible, harbored SCCmec V, and was positive for sed, seg, and sej but negative for PVL virulence factors. This study shows the presence of enterotoxigenic HA-, CA-, and LA-MRSA in foods illegally entering the EU, and highlights illegal importation of food as route of enterotoxigenic MRSA spread. Uncontrolled entry of food stuffs into the EU can be a relevant neglected route of MRSA dissemination.
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Affiliation(s)
- David Rodríguez-Lázaro
- Microbiology Division, Department of Biotechnology and Food Science, Faculty of Science, University of BurgosBurgos, Spain
| | - Elena-Alexandra Oniciuc
- Microbiology Division, Department of Biotechnology and Food Science, Faculty of Science, University of BurgosBurgos, Spain
- Faculty of Food Science and Engineering, Dunarea de Jos University of GalatiGalati, Romania
| | - Patricia G. García
- Laboratory of Molecular Biology and Microbiology, Instituto Tecnológico Agrario de Castilla y LeónValladolid, Spain
| | - David Gallego
- Dependencia de Sanidad de Vizcaya, Delegación del Gobierno en el País VascoBilbao, Spain
| | - Isabel Fernández-Natal
- Department of Clinical Microbiology, Complejo Asistencial Universitario de LeónLeón, Spain
- Institute of Biomedicine, University of LeónLeón, Spain
| | - Marta Dominguez-Gil
- Department of Clinical Microbiology, University Hospital Rio HortegaValladolid, Spain
| | - José M. Eiros-Bouza
- Department of Clinical Microbiology, University Hospital Rio HortegaValladolid, Spain
| | - Martin Wagner
- Institute for Milk Hygiene, Milk Technology and Food Science, University of Veterinary Medicine ViennaVienna, Austria
| | - Anca I. Nicolau
- Faculty of Food Science and Engineering, Dunarea de Jos University of GalatiGalati, Romania
| | - Marta Hernández
- Laboratory of Molecular Biology and Microbiology, Instituto Tecnológico Agrario de Castilla y LeónValladolid, Spain
- Departamento de Ingeniería Agrícola y Forestal, Tecnología de los Alimentos, Escuela Técnica Superior de Ingenierías Agrarias, Universidad de ValladolidPalencia, Spain
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Zehra A, Singh R, Kaur S, Gill JPS. Molecular characterization of antibiotic-resistant Staphylococcus aureus from livestock (bovine and swine). Vet World 2017; 10:598-604. [PMID: 28717309 PMCID: PMC5499074 DOI: 10.14202/vetworld.2017.598-604] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Accepted: 04/15/2017] [Indexed: 12/27/2022] Open
Abstract
Aim: The aim of this study was to figure the prevalence, phenotypic and genotypic antibiotic resistance (AR) pattern of Staphylococcus aureus isolated from bovine and swine nares. Materials and Methods: Colonies with typical morphology on Baird-Parker agar supplemented with egg-yolk tellurite emulsion were selected and biochemically/genotypically identified as S. aureus. These strains were further subjected to epsilometer test for their sensitivity to various clinically important antibiotics and antibiotic susceptibility testing for amoxicillin/clavulanic acid, and double-disk diffusion testing was performed by the standard disc diffusion method following CLSI guidelines. S. aureus strains were also tested for the presence of AR genes, viz., blaZ, mecA, aacA-aphD, erm (ermA, ermB, ermC), tet (efflux genes tetK and tetL, tetM and tetO of the ribosomal protection family), and vanA. Results: The nasal cavities of 17 out of 47 randomly selected bovine and 20 out of 28 randomly selected swine were positive for S. aureus, representing the prevalence of 36.2% (95% confidence interval [CI]: 22.5-49.9) and 71.4% (95% CI: 54.7-88.1), respectively. Most of the S. aureus strains showed higher resistance to penicillin (94.6%, minimal inhibitory concentration [MIC] ≥1.5 µg/ml) followed by ciprofloxacin (56.7%, MIC ≥32 µg/ml) and tetracycline (18.9%, MIC ≥32 µg/ml). About 10-15% of the strains were resistant to gentamicin (MIC 16 µg/ml) and oxacillin (MIC 6-8 µg/ml). None of the strains were resistant to vancomycin (MIC 0.25-1.5 µg/ml). In this study, 32.4% strains were resistant to three or more than three antibiotics and prevalence of this multi-drug resistant S. aureus was 45% (95%CI: 26.6-63.4) and 17.6% (95%CI: 6.7-28.5) in swine and bovine nasal samples, respectively. Four strains from pigs were borderline oxacillin-resistant S. aureus MIC 6-8 µg/ml, but none were mecA positive. Two of these strains were β-lactamase hyperproducers. Among the resistance genes blaZ, tetK, tetL, tetM, ermB, and aacA-aphD were found. Conclusion: Our results demonstrated the absence of mecA and pvl gene, but the presence of multi-drug resistant S. aureus in the nares of healthy animals which has a potential to spread in a community.
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Affiliation(s)
- Asima Zehra
- School of Public Health and Zoonoses, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, Punjab, India
| | - Randhir Singh
- School of Public Health and Zoonoses, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, Punjab, India
| | - Simranpreet Kaur
- School of Public Health and Zoonoses, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, Punjab, India
| | - J P S Gill
- School of Public Health and Zoonoses, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, Punjab, India
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20
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Oniciuc EA, Nicolau AI, Hernández M, Rodríguez-Lázaro D. Presence of methicillin-resistant Staphylococcus aureus in the food chain. Trends Food Sci Technol 2017. [DOI: 10.1016/j.tifs.2016.12.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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21
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Müller A, Seinige D, Jansen W, Klein G, Ehricht R, Monecke S, Kehrenberg C. Variety of Antimicrobial Resistances and Virulence Factors in Staphylococcus aureus Isolates from Meat Products Legally and Illegally Introduced to Germany. PLoS One 2016; 11:e0167864. [PMID: 27936152 PMCID: PMC5148004 DOI: 10.1371/journal.pone.0167864] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Accepted: 11/21/2016] [Indexed: 11/28/2022] Open
Abstract
Food products of animal origin can serve as a vehicle for Staphylococcus (S.) aureus, a facultative pathogen involved in a variety of diseases. As a result, international trade and illegal transportation of foodstuffs can facilitate the distribution of S. aureus over long distances. In this study, we investigated S. aureus isolates recovered from meat products confiscated from passengers returning from non-EU countries at two German airports and from samples of legally imported meats from non-EU countries. The aim was to characterize isolates in regard to their genetic relatedness as well as their antimicrobial resistance profiles and major virulence factors in order to assess potential risks associated with these products. The isolates were characterized by spa typing, MLST, macrorestriction analysis, microarray analysis and antimicrobial susceptibility testing. MRSA isolates were further characterized by dru typing. The characteristics of the majority of the isolates indicated a human origin, rather than an association with livestock. The results further revealed a considerable heterogeneity among the MRSA isolates, despite their common origin. Overall, a plenitude of major virulence factors and antimicrobial resistances was detected among the isolates, highlighting the potential risks associated with contaminated meat products and the transportation of such products among different countries.
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Affiliation(s)
- Anja Müller
- Institute of Food Quality and Food Safety, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - Diana Seinige
- Institute of Food Quality and Food Safety, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - Wiebke Jansen
- Institute of Food Quality and Food Safety, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
- Integrated Veterinary Research Unit, University of Namur, Namur, Belgium
| | - Günter Klein
- Institute of Food Quality and Food Safety, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - Ralf Ehricht
- Alere Technologies GmbH, Jena, Germany
- InfectoGnostics research campus, Jena, Germany
| | - Stefan Monecke
- Alere Technologies GmbH, Jena, Germany
- InfectoGnostics research campus, Jena, Germany
- Institute for Medical Microbiology and Hygiene, Technische Universität Dresden, Dresden, Germany
| | - Corinna Kehrenberg
- Institute of Food Quality and Food Safety, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
- * E-mail:
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Espigares E, Moreno Roldan E, Espigares M, Abreu R, Castro B, Dib AL, Arias Á. Phenotypic Resistance to Disinfectants and Antibiotics in Methicillin-Resistant Staphylococcus aureus Strains Isolated from Pigs. Zoonoses Public Health 2016; 64:272-280. [PMID: 27762078 DOI: 10.1111/zph.12308] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Indexed: 12/20/2022]
Abstract
The aim of this research was to study the phenotypic resistances to disinfectants and antibiotics in strains of methicillin-resistant Staphylococcus aureus (MRSA) obtained from Canary black pigs. Analyses were performed on 54 strains of MRSA, isolated in Canary black pigs from the province of Tenerife (Spain); all of them carried the mecA gene. The strains were isolated by means of nasal swab samples of healthy pigs, collected under veterinarian supervision. Bactericidal activity of antiseptics and disinfectants was tested by means of the dilution-neutralization method. Susceptibility to the disinfectants glutaraldehyde, peracetic acid and silver nitrate was assessed, as well as to the antiseptics chlorhexidine, benzalkonium chloride and povidone iodine. Susceptibility to a wide array of antibiotics representing the main groups was determined by means of the disc diffusion method. All the strains demonstrated susceptibility to the disinfectants tested at the recommended concentration, and even to dilutions equal to or lesser than 1/16. The most effective antiseptic and disinfectant were, respectively, chlorhexidine and silver nitrate. With regard to the antibiotics, the strains proved to be multiresistant. All presented phenotypic resistance to the β-lactam antibiotics ampicillin, penicillin and cefoxitin, as well as to numerous aminoglycosides, tetracycline and trimethoprim-sulfamethoxazole. It was also observed that 61.1% of the strains were carriers of plasmids. Our results underline that in the strains such as MRSA, which show multiple resistances to antibiotics, the antiseptics and disinfectants show great efficacy. Moreover, as other authors also suggest, for the treatment and prevention of infections caused by MRSA, the use of β-lactam and aminoglycoside antibiotics may be less effective.
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Affiliation(s)
- E Espigares
- Department of Preventive Medicine and Public Health, University of Granada, Granada, Spain
| | - E Moreno Roldan
- Department of Preventive Medicine and Public Health, University of Granada, Granada, Spain
| | - M Espigares
- Department of Preventive Medicine and Public Health, University of Granada, Granada, Spain
| | - R Abreu
- Department of Preventive Medicine and Public Health, University of La Laguna, Canary Islands, Spain
| | - B Castro
- University Hospital of Canary Islands, Tenerife Canary Islands, Spain
| | - A L Dib
- Laboratoire de Gestion de la Santé et Productions Animales-Institut des Sciences Vétérinaire El Khroub, Université des Frères Mentouri, Constantine, Algeria
| | - Á Arias
- Department of Preventive Medicine and Public Health, University of La Laguna, Canary Islands, Spain
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Herrera FC, García-López ML, Santos JA. Short communication: Characterization of methicillin-resistant Staphylococcus aureus isolated from raw milk fresh cheese in Colombia. J Dairy Sci 2016; 99:7872-7876. [PMID: 27423957 DOI: 10.3168/jds.2016-11322] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Accepted: 06/08/2016] [Indexed: 11/19/2022]
Abstract
The aim of this study was the characterization of a collection of 8 methicillin-resistant Staphylococcus aureus (MRSA) isolates, obtained from samples of fresh cheese (Doble Crema) produced from raw cow milk in small dairies in Colombia. All the isolates harbored the mecA and Panton-Valentine leukocidin (PVL) genes, presented with SCCmec type IV, and belonged to multilocus sequence type 8 and spa type 024. Seven isolates presented 3 closely related pulsed-field gel electrophoresis profiles. Three of them carried the staphylococcal enterotoxin B gene. The isolates were resistant to cefoxitin, oxacillin, penicillin, and ampicillin and susceptible to all non-β-lactams antibiotics tested, with minimum inhibitory concentration values for oxacillin of 4 to 8mg/L. The isolates belonged to the community-acquired MRSA group, suggesting a human source of contamination. The risk of human infection by MRSA via contaminated foods is considered low, but contaminated food commodities can contribute to the worldwide dissemination of clones of community-acquired MRSA.
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Affiliation(s)
- Fanny C Herrera
- Department of Food Hygiene and Food Technology, Veterinary Faculty, University of León, ES24071 Spain; Grupo de Investigación en Microbiología y Biotecnología (GIMBIO), Departamento de Microbiología, Facultad de Ciencias Básicas, Universidad de Pamplona, Pamplona, Norte de Santander, Colombia
| | - María-Luisa García-López
- Department of Food Hygiene and Food Technology, Veterinary Faculty, University of León, ES24071 Spain
| | - Jesús A Santos
- Department of Food Hygiene and Food Technology, Veterinary Faculty, University of León, ES24071 Spain.
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El Bayomi RM, Ahmed HA, Awadallah MAI, Mohsen RA, Abd El-Ghafar AE, Abdelrahman MA. Occurrence, Virulence Factors, Antimicrobial Resistance, and Genotyping of Staphylococcus aureus Strains Isolated from Chicken Products and Humans. Vector Borne Zoonotic Dis 2016; 16:157-64. [PMID: 26807798 DOI: 10.1089/vbz.2015.1891] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Staphylococcus aureus in food is a consequence of inadequate hygienic handling and processing, posing a potential risk to public health. The current study aimed to characterize virulence factors, as well as antimicrobial resistance of Staphylococcus aureus and methicillin-resistant S. aureus (MRSA) isolated from retail chicken products and hand swabs from vendors in Egypt. In addition, genetic relatedness of the isolates from chicken and humans was evaluated by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) using protein A as a target. A total of 110 samples were collected from chicken products (n = 80) and vendors (n = 30). Overall, 30 (37.5%) chicken products samples were positive for S. aureus, whereas hand swabs from meat handlers revealed that 18 (60%) were positive. Ten MRSA strains were characterized by the presence of the mecA gene, comprising seven isolates from chicken and three from humans. Virulence-associated factors were evaluated by PCR, revealing that 31.3% of S. aureus isolates harbored the Panton-Valentine leukocidin (PVL) gene, whereas 10.4% were positive for the sea and sed genes each, and only two isolates were positive for γ-hemolysin-associated gene. Genotyping using spa PCR-RFLP showed identical restriction banding patterns of MRSA isolates of human and chicken meat origin, indicating the genetic relatedness of the isolates. To the best of our knowledge, this is the first study to characterize PVL-positive MRSA from chicken products and to utilize spa-RFLP for evaluating the genetic relatedness between MRSA of human and chicken origin in Egypt.
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Affiliation(s)
- Rasha M El Bayomi
- 1 Department of Food Control, Faculty of Veterinary Medicine, Zagazig University , Zagazig, Egypt
| | - Heba A Ahmed
- 2 Department of Zoonoses, Faculty of Veterinary Medicine, Zagazig University , Zagazig, Egypt
| | - Maysa A I Awadallah
- 2 Department of Zoonoses, Faculty of Veterinary Medicine, Zagazig University , Zagazig, Egypt
| | - Rasha A Mohsen
- 3 Department of Microbiology, Animal Health Research Institute , Mansoura Branch, Mansoura, Egypt
| | - Abeer E Abd El-Ghafar
- 3 Department of Microbiology, Animal Health Research Institute , Mansoura Branch, Mansoura, Egypt
| | - Mahmoud A Abdelrahman
- 3 Department of Microbiology, Animal Health Research Institute , Mansoura Branch, Mansoura, Egypt
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Oniciuc EA, Ariza-Miguel J, Bolocan AS, Diez-Valcarce M, Rovira J, Hernández M, Fernández-Natal I, Nicolau AI, Rodríguez-Lázaro D. Foods from black market at EU border as a neglected route of potential methicillin-resistant Staphylococcus aureus transmission. Int J Food Microbiol 2015; 209:34-8. [DOI: 10.1016/j.ijfoodmicro.2014.11.015] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Revised: 10/30/2014] [Accepted: 11/17/2014] [Indexed: 10/24/2022]
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Moon DC, Tamang MD, Nam HM, Jeong JH, Jang GC, Jung SC, Park YH, Lim SK. Identification of Livestock-Associated Methicillin-ResistantStaphylococcus aureusIsolates in Korea and Molecular Comparison Between Isolates from Animal Carcasses and Slaughterhouse Workers. Foodborne Pathog Dis 2015; 12:327-34. [DOI: 10.1089/fpd.2014.1868] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Dong Chan Moon
- Bacterial Disease Division, Animal and Plant Quarantine Agency, Anyang-si, Gyeonggi-do, Korea
| | - Migma Dorji Tamang
- Bacterial Disease Division, Animal and Plant Quarantine Agency, Anyang-si, Gyeonggi-do, Korea
| | - Hyang-Mi Nam
- Bacterial Disease Division, Animal and Plant Quarantine Agency, Anyang-si, Gyeonggi-do, Korea
| | - Jin-Ha Jeong
- Bacterial Disease Division, Animal and Plant Quarantine Agency, Anyang-si, Gyeonggi-do, Korea
| | - Geum-Chan Jang
- Bacterial Disease Division, Animal and Plant Quarantine Agency, Anyang-si, Gyeonggi-do, Korea
| | - Suk-Chan Jung
- Bacterial Disease Division, Animal and Plant Quarantine Agency, Anyang-si, Gyeonggi-do, Korea
| | - Yong-Ho Park
- Department of Microbiology, College of Veterinary Medicine, Seoul National University, Seoul, Korea
| | - Suk-Kyung Lim
- Bacterial Disease Division, Animal and Plant Quarantine Agency, Anyang-si, Gyeonggi-do, Korea
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[Molecular epidemiological study of community-acquired methicillin-resistant staphylococcus aureus (CA-MRSA) - an examination of commercially distributed meat as a possible vehicle for CA-MRSA]. J UOEH 2014; 36:179-90. [PMID: 25224710 DOI: 10.7888/juoeh.36.179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Staphylococcus aureus has occupied an important position in public health as a cause of food poisoning and hospital-acquired MRSA (HA-MRSA) infections. The spread of community-acquired MRSA (CA-MRSA) infections has also recently become a concern. However, the sources of this infection remain unclear, and there are few reports of epidemiology information. In order to understand MRSA spread in the community, we investigated the distribution of MRSA strains in commercially distributed raw meat samples (n=305) and stool samples from outpatients with diarrhea (n=1,543) from the same meat distribution region in Oita Prefecture, Japan. 301 Staphylococcus aureus strains were isolated and 18 of them were MRSA (2 from chicken meat, 1 from duck meat, 1 from pork meat, and 14 from patients with diarrhea). All 18 MRSA strains were negative for Panton-Valentine leucocidin gene. In this study conducting a comparison of properties and a molecular epidemiological analysis of MRSA isolated from commercially distributed meat and diarrhea patient stools, the results suggest that commercially distributed meat could play a role in the prevalence of CA-MRSA in the community.
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29
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Pang L, Luo Y, Gu Y, Xu X, Xu J, Zhang F, Cui S. Recovery method development of sodium chloride-susceptible methicillin-resistant Staphylococcus aureus isolates from ground pork samples. Microb Drug Resist 2014; 21:1-6. [PMID: 25153854 DOI: 10.1089/mdr.2013.0223] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The growth of certain methicillin-resistant Staphylococcus aureus (MRSA) isolates could be inhibited by NaCl higher than 2.5%. The objective of this study was to develop an enrichment method to recover NaCl-susceptible MRSA isolates from meat samples. The growth of 12 MRSA and 10 non-MRSA strains was measured in Mueller-Hinton (MH) broth supplemented with 2.5%, 4%, 6.5%, and 7.5% NaCl. Selective agents, including aztreonam, polymyxin B, NaCl, nalidixic acid, and NaN3, were determined for their inhibitory effect to MRSA and non-MRSA strains in MH broth. Based on these data, a two-step enrichment method was developed to recover both NaCl-susceptible and -resistant MRSA isolates in meat products. Comparing to the enrichment method that only used MH broth supplemented with 6.5% NaCl, five additional NaCl-susceptible MRSA isolates were recovered from 92 retail ground pork samples by this newly developed two-step enrichment method. To the best of our knowledge, this is the first study that considers NaCl-susceptible MRSA recovery from ground pork samples. The application of this new enrichment method might expand the diversity of MRSA isolates recovered from various samples.
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Affiliation(s)
- Lu Pang
- 1 Tianjin Entry-Exit Inspection and Quarantine Bureau , Beijing, People's Republic of China
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Rodríguez-Lázaro D, Ariza-Miguel J, Diez-Valcarce M, Fernández-Natal I, Hernández M, Rovira J. Foods confiscated from non-EU flights as a neglected route of potential methicillin-resistant Staphylococcus aureus transmission. Int J Food Microbiol 2014; 209:29-33. [PMID: 25174658 DOI: 10.1016/j.ijfoodmicro.2014.08.016] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Revised: 08/04/2014] [Accepted: 08/05/2014] [Indexed: 11/17/2022]
Abstract
The emergence of methicillin-resistant Staphylococcus aureus (MRSA) in food-producing animals has provoked a great concern in the presence of MRSA in associated foodstuff. In this study, we have assessed for the first time the presence of MRSA in food confiscated from non-EU flights. We performed a search for MRSA among 195 food samples confiscated from passengers on flights from twenty-one non-EU countries in 2012 and 2013. One hundred and seventeen meat samples of diverse animal origin (including antelope, beef, chicken, duck, guinea pig, pork, rodents, and turkey), 75 dairy products (74 cheeses and 1 butter) and 3 eggs were analyzed. All S. aureus were studied by pulsed-field gel electrophoresis (PFGE) and antimicrobial susceptibility testing. MRSA isolates were further characterized by multilocus sequence typing (MLST), SCCmec typing, and tested for the presence of Panton-Valentine leukocidin (PVL) virulence factors. Overall, 66 food samples were positive for S. aureus (33.9%). Six S. aureus strains were MRSA (9.1%), all of them in flights from Bolivia (and 5 from the same passenger). Among methicillin-sensitive S. aureus (MSSA) (60 out of 66S. aureus strains), 44.1% were resistant to penicillin, 10.2% to tetracycline, 8.5% were resistant to aminoglycosides (amikacin and tobramycin) and 3.4% exhibited the M phenotype. MRSA isolates were sensitive to all non-β-lactam antibiotics tested. SmaI-PFGE analysis provided 40 genotypes among the S. aureus isolates (three genotypes among the six MRSA). Five MRSA isolates belonged to ST8 and harboured SCCmec type IVc as well as PVL genes. One isolate belonged to ST1649, harboured SCCmec type IVc and tested negative for the presence of the PVL genes. In conclusion, in this study, we report for the first time the presence of CA-MRSA in food confiscated from non-EU flights: ST8/ST1649-MRSA-IV. These results confirm the illegal entrance of food as a neglected route of transmission as well as the dissemination of successful CA-MRSA lineages among countries via illegal foods. As a result, illegally imported food could play a role in the prevalence and evolution of MRSA clones in the community.
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Affiliation(s)
- David Rodríguez-Lázaro
- InstitutoTecnológicoAgrario de Castilla y León (ITACyL), Valladolid, Spain; Microbiology Section, Faculty of Sciences, University of Burgos, Burgos, Spain.
| | - Jaime Ariza-Miguel
- InstitutoTecnológicoAgrario de Castilla y León (ITACyL), Valladolid, Spain
| | - Marta Diez-Valcarce
- Department of Food Science and Biotechnology, Faculty of Sciences, University of Burgos, Burgos, Spain
| | - Isabel Fernández-Natal
- Complejo Asistencial Universitario de León, León, Spain; Institute of Biomedicine (IBIOMED), University of León, León, Spain
| | - Marta Hernández
- InstitutoTecnológicoAgrario de Castilla y León (ITACyL), Valladolid, Spain
| | - Jordi Rovira
- Department of Food Science and Biotechnology, Faculty of Sciences, University of Burgos, Burgos, Spain
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Neyra RC, Frisancho JA, Rinsky JL, Resnick C, Carroll KC, Rule AM, Ross T, You Y, Price LB, Silbergeld EK. Multidrug-resistant and methicillin-resistant Staphylococcus aureus (MRSA) in hog slaughter and processing plant workers and their community in North Carolina (USA). ENVIRONMENTAL HEALTH PERSPECTIVES 2014; 122:471-7. [PMID: 24508836 PMCID: PMC4014760 DOI: 10.1289/ehp.1306741] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2013] [Accepted: 02/04/2014] [Indexed: 05/27/2023]
Abstract
BACKGROUND Use of antimicrobials in industrial food-animal production is associated with the presence of antimicrobial-resistant Staphylococcus aureus (S. aureus) among animals and humans. Hog slaughter/processing plants process large numbers of animals from industrial animal operations and are environments conducive to the exchange of bacteria between animals and workers. OBJECTIVES We compared the prevalence of multidrug-resistant S. aureus (MDRSA) and methicillin-resistant S. aureus (MRSA) carriage among processing plant workers, their household members, and community residents. METHODS We conducted a cross-sectional study of hog slaughter/processing plant workers, their household members, and community residents in North Carolina. Participants responded to a questionnaire and provided a nasal swab. Swabs were tested for S. aureus, and isolates were tested for antimicrobial susceptibility and subjected to multilocus sequence typing. RESULTS The prevalence of S. aureus was 21.6%, 30.2%, and 22.5% among 162 workers, 63 household members, and 111 community residents, respectively. The overall prevalence of MDRSA and MRSA tested by disk diffusion was 6.9% and 4.8%, respectively. The adjusted prevalence of MDRSA among workers was 1.96 times (95% CI: 0.71, 5.45) the prevalence in community residents. The adjusted average number of antimicrobial classes to which S. aureus isolates from workers were resistant was 2.54 times (95% CI: 1.16, 5.56) the number among isolates from community residents. We identified two MDRSA isolates and one MRSA isolate from workers as sequence type 398, a type associated with exposure to livestock. CONCLUSIONS Although the prevalence of S. aureus and MRSA was similar in hog slaughter/processing plant workers and their household and community members, S. aureus isolates from workers were resistant to a greater number of antimicrobial classes. These findings may be related to the nontherapeutic use of antimicrobials in food-animal production.
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Pharmacodynamics of cefquinome in a neutropenic mouse thigh model of Staphylococcus aureus infection. Antimicrob Agents Chemother 2014; 58:3008-12. [PMID: 24614373 DOI: 10.1128/aac.01666-13] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Cefquinome is a cephalosporin with broad-spectrum antibacterial activity, including activity against Staphylococcus aureus. The objective of our study was to examine the in vivo activity of cefquinome against S. aureus strains by using a neutropenic mouse thigh infection model. Cefquinome kinetics and protein binding in infected neutropenic mice were measured by liquid chromatography-tandem mass spectrometry (LC-MS/MS). In vivo postantibiotic effects (PAEs) were determined after a dose of 100 mg/kg of body weight in mice infected with S. aureus strain ATCC 29213. The animals were treated by subcutaneous injection of cefquinome at doses of 2.5 to 320 mg/kg of body weight per day divided into 1, 2, 3, 6, or 12 doses over 24 h. Cefquinome exhibited time-dependent killing and produced in vivo PAEs at 2.9 h. The percentage of time that serum concentrations were above the MIC (%T>MIC) was the pharmacokinetic-pharmacodynamic (PK-PD) index that best described the efficacy of cefquinome. Subsequently, we employed a similar dosing strategy by using increasing total cefquinome doses that increased 4-fold and were administered every 4 h to treat animals infected with six additional S. aureus isolates. A sigmoid maximum effect (Emax) model was used to estimate the magnitudes of the ratios of the %T that the free-drug serum concentration exceeded the MIC (%T>fMIC) associated with net bacterial stasis, a 0.5-log10 CFU reduction from baseline, and a 1-log10 CFU reduction from baseline; the respective values were 30.28 to 36.84%, 34.38 to 46.70%, and 43.50 to 54.01%. The clear PAEs and potent bactericidal activity make cefquinome an attractive option for the treatment of infections caused by S. aureus.
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Chuang YY, Huang YC. Molecular epidemiology of community-associated meticillin-resistant Staphylococcus aureus in Asia. THE LANCET. INFECTIOUS DISEASES 2013; 13:698-708. [PMID: 23827369 DOI: 10.1016/s1473-3099(13)70136-1] [Citation(s) in RCA: 176] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
In Asia, most reports on the epidemiology of community-associated meticillin-resistant Staphylococcus aureus (CA-MRSA) are from developed countries, with few data from resource-limited countries, not because of low actual prevalence, but probably because of scarce diagnostic facilities. The rate of MRSA in all community-associated S. aureus infections in Asian countries ranges from 2·5% to 39%. Unlike the predominance of USA300-sequence type (ST) 8 staphylococcal cassette chromosome mec (SCCmec) type IV in the USA, the molecular epidemiology of CA-MRSA in Asia is characterised by clonal heterogeneity, similar to that in Europe. The emergence of CA-MRSA is a threat in both community and hospital settings because such strains are now more prevalent than are health-care-associated MRSA (HA-MRSA) strains. Many epidemic clones are in circulation in Asia and with scarce data available, concern has arisen that CA-MRSA could have devastating results if it becomes epidemic in resource-poor regions. The epidemiology of CA-MRSA in Asia is closely linked with the health of both developing and developed countries. The present situation of CA-MRSA in Asia is important not only for local public health, but also to provide a better understanding of the successful epidemic clones of this global pathogen.
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Affiliation(s)
- Yu-Yu Chuang
- Department of Pediatrics, St Mary's Hospital, Luodong, Taiwan
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Abstract
Food-borne intoxication, caused by heat-stable enterotoxins produced by Staphylococcus aureus, causes over 240,000 cases of food-borne illness in the United States annually. Other staphylococci commonly associated with animals may also produce these enterotoxins. Foods may be contaminated by infected food handlers during slaughter and processing of livestock or by cross-contamination during food preparation. S. aureus also causes a variety of mild to severe skin and soft tissue infections in humans and other animals. Antibiotic resistance is common in staphylococci. Hospital-associated (HA) S. aureus are resistant to numerous antibiotics, with methicillin-resistant S. aureus (MRSA) presenting significant challenges in health care facilities for over 40 years. During the mid-1990s new human MRSA strains developed outside of hospitals and were termed community-associated (CA). A few years later, MRSA was isolated from horses and methicillin resistance was detected in Staphylococcus intermedius/pseudintermedius from dogs and cats. In 2003, a livestock-associated (LA) MRSA strain was first detected in swine. These methicillin-resistant staphylococci pose additional food safety and occupational health concerns. MRSA has been detected in a small percentage of retail meat and raw milk samples indicating a potential risk for food-borne transmission of MRSA. Persons working with animals or handling meat products may be at increased risk for antibiotic-resistant infections. This review discusses the scope of the problem of methicillin-resistant staphylococci and some strategies for control of these bacteria and prevention of illness.
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Hawken P, Weese JS, Friendship R, Warriner K. Longitudinal study of Clostridium difficile and Methicillin-resistant Staphylococcus aureus associated with pigs from weaning through to the end of processing. J Food Prot 2013; 76:624-30. [PMID: 23575124 DOI: 10.4315/0362-028x.jfp-12-330] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
There has been a recent increase in community-associated infections linked to methicillin-resistant Staphylococcus aureus (MRSA) and Clostridium difficile. It is established that both pathogens can be recovered from retail pork, although it is unclear to what degree contamination is acquired at the farm in comparison to that acquired during processing. To address this gap, the following study reports on the carriage of MRSA and C. difficile on pigs from birth through to the end of processing. C. difficile was isolated from 28 (93%) of 30 pigs at 1 day of age, but prevalence declined sharply to 1 of 26 by market age (188 days). MRSA prevalence peaked at 74 days of age, with 19 (68%) of 28 pigs testing positive, but declined to 3 of 26 at 150 days of age, with no pig being detected as positive at market age. At the processing facility, C. difficile was isolated from the holding area, with a single carcass testing positive for the pathogen at preevisceration. MRSA was primarily isolated from nasal swabs with 8 (31%) carcasses testing positive at postbleed, which increased to 14 (54%) positive at postscald tanks. Only one carcass (sampled at postbleed) tested positive for MRSA, with no recovery of the pathogen from environmental samples taken. C. difficile ribotype 078 predominated in the longitudinal portion of the study, accounting for all of the 68 isolates recovered from pigs. Only three C. difficile isolates, which were identified as ribotype 078, were recovered at the slaughterhouse. MRSA spa type 539 (t034) predominated in pigs on the farm and samples taken at the slaughterhouse, accounting for 80% of all isolates recovered. The study demonstrated that both C. difficile and MRSA acquired on the farm can be transferred through to processing, although no evidence for significant cross-contamination between carcasses or the slaughterhouse environment was evident.
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Affiliation(s)
- Philip Hawken
- Department of Food Science, University of Guelph, Guelph, Ontario, Canada
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36
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Petinaki E, Spiliopoulou I. Methicillin-resistant Staphylococcus aureus among companion and food-chain animals: impact of human contacts. Clin Microbiol Infect 2012; 18:626-34. [DOI: 10.1111/j.1469-0691.2012.03881.x] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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37
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Genotyping of skin and soft tissue infection (SSTI)-associated methicillin-resistant Staphylococcus aureus (MRSA) strains among outpatients in a teaching hospital in Japan: application of a phage-open reading frame typing (POT) kit. J Infect Chemother 2012; 18:906-14. [DOI: 10.1007/s10156-012-0506-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2012] [Accepted: 10/10/2012] [Indexed: 11/26/2022]
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