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Manafi L, Aliakbarlu J, Dastmalchi Saei H. Susceptibility of
Salmonella
serotypes isolated from meat and meat contact surfaces to thermal, acidic, and alkaline treatments and disinfectants. Food Sci Nutr 2023; 11:1882-1890. [PMID: 37051333 PMCID: PMC10084953 DOI: 10.1002/fsn3.3221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2021] [Revised: 12/13/2022] [Accepted: 12/28/2022] [Indexed: 01/11/2023] Open
Abstract
The present study was conducted to evaluate the response of 29 Salmonella isolates to exposure to thermal (60°C for 2 min), acidic (pH 2.9 for 30 min), and alkaline (pH 11 for 60 min) treatments and investigate the susceptibility of the isolates and their biofilms to disinfectants. The reductions of Salmonella isolates populations subjected to each treatment were analyzed according to their isolation source, serotype, antibiotic resistance pattern, and biofilm formation ability. Median reductions for all of Salmonella isolates populations after thermal, acidic, and alkaline treatments were 1.8, 2.1, and 0.7 log CFU/ml, respectively. The isolates behavior under stress conditions were not related to their isolation source, serotype, or biofilm formation ability. The median reduction after alkaline treatment in non-MDR (multidrug- resistant) isolates populations was significantly (p < .05) higher than MDR isolates. The median reduction in biofilms of moderate biofilm producers by disinfectants was significantly (p < .05) higher than that of strong biofilm producers. In conclusion, Salmonella isolates showed the highest susceptibility to acidic treatment and MDR isolates were more resistant to alkaline treatment than non-MDR ones. The current study also revealed that the strong biofilm producer isolates were more resistant to disinfectants than moderate biofilm producers. This study facilitated the understanding of the relationship between Salmonella characteristics (isolation source, serotype, antibiotic resistance pattern, and biofilm formation ability) and its susceptibility to thermal, acidic, and alkaline treatments and disinfectants. The findings are helpful for the prevention and control of Salmonella.
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Affiliation(s)
| | | | - Habib Dastmalchi Saei
- Faculty of Veterinary Medicine, Department of Microbiology Urmia University Urmia Iran
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Shaibu AO, Okolocha EC, Maikai BV, Olufemi OT. Isolation and antibiogram of Salmonella species from slaughtered cattle and the processing environment in Abuja abattoirs, Nigeria. Food Control 2021. [DOI: 10.1016/j.foodcont.2021.107972] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Uzeh RE, Adewumi F, Odumosu BT. Antibiotic resistance and plasmid analysis of Enterobacteriaceae isolated from retail meat in Lagos Nigeria. ONE HEALTH OUTLOOK 2021; 3:10. [PMID: 34092264 PMCID: PMC8182925 DOI: 10.1186/s42522-021-00042-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 04/21/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND The presence of antibiotic resistant microorganisms in food is of great concern globally. This research was carried out to detect and characterize plasmid carriage and profiles among members of Enterobacteriaceae from different meat types in Nigeria. METHOD From a total of 80 meat samples comprising of mutton,pork, beef and chicken, organisms belonging to the family Enterobacteriaceae wereisolated by standard procedures and identified by API 20E system. Antibiotics susceptibilities testing (AST) againstselected classes of antimicrobial agents and plasmid extraction was carried outby disc diffusion and alkaline lysis methods respectively. RESULTS One-hundred and ten Enterobacteriaceae were isolated,species identification revealed isolates belonging to 7 genera comprising of Escherichia, Enterobacter, Klebsiella,Citrobacter, Proteus, Salmonella and Serratia. Overall resistance of theorganisms to amoxycillin/clavulanic acid was 91 (82.7%), streptomycin 85(75.7%) and perfloxacin 74 (67.2%) while ofloxacin had the highestsusceptibility rate (91.8%). Plasmids profiling revealed ranges of plasmids from1 to 3 copies with estimated sizes range of 700bp to 1.1kb among E. coli, K. pneumoniae, E. aerogenesand Proteus mirabilis. All theisolates with plasmids were multidrug resistant and were isolated from chicken excepta strain of E. coli from pork whichharboured a single plasmid copy suggesting these meat as reservoirs forantibiotic resistant bacteria. CONCLUSION Our findings revealed high level of meat contamination with antibioticresistant Enterobacteriaceae harbouring resistant plasmids. An integratedsurveillance system and safety practice must be ensured among the processorsand retailers.
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Affiliation(s)
- Roseline Ekiomado Uzeh
- Department of Microbiology, Faculty of Science, University of Lagos, Akoka-Yaba, Lagos, Nigeria
| | - Fadekemisola Adewumi
- Department of Microbiology, Faculty of Science, University of Lagos, Akoka-Yaba, Lagos, Nigeria
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Manafi L, Aliakbarlu J, Dastmalchi Saei H. Antibiotic resistance and biofilm formation ability of Salmonella serotypes isolated from beef, mutton, and meat contact surfaces at retail. J Food Sci 2020; 85:2516-2522. [PMID: 32671849 DOI: 10.1111/1750-3841.15335] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 05/13/2020] [Accepted: 05/23/2020] [Indexed: 01/08/2023]
Abstract
In this study, Salmonella isolates recovered from meat (beef and mutton) and meat contact surfaces at retail were investigated to determine their serotype, antibiotic resistance, and biofilm formation ability. Salmonella was found in 29 (24.17%) samples out of 120 samples including 14/50 (28%) of beef, 10/40 (25%) of mutton, and 5/30 (16.67%) of meat contact surfaces. Seven isolates were identified as S. Enteritidis, three as S. Typhimurium, and two as S. Typhi, while the rest of the isolates were considered as other Salmonella spp. All of the isolates were resistant to at least one antimicrobial agent and 48.27% of them were identified as multidrug-resistant (MDR) Salmonella. All (100%) of meat contact surfaces isolates, 42.8% of beef isolates, and 30% of mutton isolates were found to be MDR Salmonella. Resistance to nalidixic acid (100%), tetracycline (79.3%), and sulphamethoxazole/trimethoprim (44.8%) were observed. The gyrA gene was detected in 19 of 29 isolates, but tetA was found in one isolate. All of the serotypes were able to form biofilm (75.86 % moderate and 24.14 % strong) and S. Enteritidis was the strongest biofilm producer. The findings indicated that the majority of Salmonella isolates in this study were MDR and biofilm producer. Then, safety measures such as cleaning and disinfection must be taken to control Salmonella and promote public health. PRACTICAL APPLICATION: The present study provides useful information on the prevalence of Salmonella serotypes in meat and meat contact surfaces and their antibiotic resistance patterns as well as biofilm formation capacities. Improving hygiene practices in livestock, slaughterhouses, and at retails may reduce the risk of meat contamination to Salmonella. Meanwhile, high levels of antibiotic resistance in Salmonella isolates emphasized on the improper use of antibiotics.
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Affiliation(s)
- Leila Manafi
- Department of Food Hygiene and Quality Control, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
| | - Javad Aliakbarlu
- Department of Food Hygiene and Quality Control, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
| | - Habib Dastmalchi Saei
- Department of Microbiology, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
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Thomas KM, de Glanville WA, Barker GC, Benschop J, Buza JJ, Cleaveland S, Davis MA, French NP, Mmbaga BT, Prinsen G, Swai ES, Zadoks RN, Crump JA. Prevalence of Campylobacter and Salmonella in African food animals and meat: A systematic review and meta-analysis. Int J Food Microbiol 2020; 315:108382. [PMID: 31710971 PMCID: PMC6985902 DOI: 10.1016/j.ijfoodmicro.2019.108382] [Citation(s) in RCA: 65] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2019] [Revised: 08/20/2019] [Accepted: 10/02/2019] [Indexed: 02/07/2023]
Abstract
BACKGROUND Campylobacter and Salmonella, particularly non-typhoidal Salmonella, are important bacterial enteric pathogens of humans which are often carried asymptomatically in animal reservoirs. Bacterial foodborne infections, including those derived from meat, are associated with illness and death globally but the burden is disproportionately high in Africa. Commercial meat production is increasing and intensifying in many African countries, creating opportunities and threats for food safety. METHODS Following Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) guidelines, we searched six databases for English language studies published through June 2016, that reported Campylobacter or Salmonella carriage or infection prevalence in food animals and contamination prevalence in food animal products from African countries. A random effects meta-analysis and multivariable logistic regression were used to estimate the species-specific prevalence of Salmonella and Campylobacter and assess relationships between sample type and region and the detection or isolation of either pathogen. RESULTS Seventy-three studies reporting Campylobacter and 187 studies reporting Salmonella across 27 African countries were represented. Adjusted prevalence calculations estimate Campylobacter detection in 37.7% (95% CI 31.6-44.3) of 11,828 poultry samples; 24.6% (95% CI 18.0-32.7) of 1975 pig samples; 17.8% (95% CI 12.6-24.5) of 2907 goat samples; 12.6% (95% CI 8.4-18.5) of 2382 sheep samples; and 12.3% (95% CI 9.5-15.8) of 6545 cattle samples. Salmonella were detected in 13.9% (95% CI 11.7-16.4) of 25,430 poultry samples; 13.1% (95% CI 9.3-18.3) of 5467 pig samples; 9.3% (95% CI 7.2-12.1) of 2988 camel samples; 5.3% (95% CI 4.0-6.8) of 72,292 cattle samples; 4.8% (95% CI 3.6-6.3) of 11,335 sheep samples; and 3.4% (95% CI 2.2-5.2) of 4904 goat samples. 'External' samples (e.g. hide, feathers) were significantly more likely to be contaminated by both pathogens than 'gut' (e.g. faeces, cloaca) while meat and organs were significantly less likely to be contaminated than gut samples. CONCLUSIONS This study demonstrated widespread prevalence of Campylobacter species and Salmonella serovars in African food animals and meat, particularly in samples of poultry and pig origin. Source attribution studies could help ascertain which food animals are contributing to human campylobacteriosis and salmonellosis and direct potential food safety interventions.
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Affiliation(s)
- Kate M Thomas
- Centre for International Health, Dunedin School of Medicine, University of Otago, Dunedin, New Zealand; Kilimanjaro Clinical Research Institute, Good Samaritan Foundation, Moshi, United Republic of Tanzania.
| | - William A de Glanville
- Institute of Biodiversity Animal Health and Comparative Medicine, College of Medical Veterinary & Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | | | | | - Joram J Buza
- School of Life Sciences and Bio-Engineering, Nelson Mandela African Institution of Science and Technology, Arusha, United Republic of Tanzania
| | - Sarah Cleaveland
- Institute of Biodiversity Animal Health and Comparative Medicine, College of Medical Veterinary & Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Margaret A Davis
- Paul G. Allen School for Global Animal Health, Washington State University, Pullman, WA, United States of America
| | - Nigel P French
- mEpiLab, Massey University, Palmerston North, New Zealand; New Zealand Food Safety Science and Research Centre, New Zealand
| | - Blandina T Mmbaga
- Kilimanjaro Clinical Research Institute, Good Samaritan Foundation, Moshi, United Republic of Tanzania
| | - Gerard Prinsen
- School of People, Environment and Planning, Massey University, Palmerston North, New Zealand
| | - Emmanuel S Swai
- State Department of Veterinary Services, Ministry of Livestock and Fisheries, Dodoma, United Republic of Tanzania
| | - Ruth N Zadoks
- Institute of Biodiversity Animal Health and Comparative Medicine, College of Medical Veterinary & Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - John A Crump
- Centre for International Health, Dunedin School of Medicine, University of Otago, Dunedin, New Zealand
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Altaf Hussain M, Wang W, Sun C, Gu L, Liu Z, Yu T, Ahmad Y, Jiang Z, Hou J. Molecular Characterization Of Pathogenic Salmonella Spp From Raw Beef In Karachi, Pakistan. Antibiotics (Basel) 2020; 9:E73. [PMID: 32050654 PMCID: PMC7168182 DOI: 10.3390/antibiotics9020073] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Revised: 01/22/2020] [Accepted: 02/01/2020] [Indexed: 01/06/2023] Open
Abstract
The aim of the present study was to estimate the prevalence of Salmonella and investigate the dominant serovars distribution in raw beef and to screen the isolated serovars for the prescense of beta-lactamases and virulence genes. A total of 150 samples of raw beef sold at butcher shops (n = 75) and supermarkets (n = 75) in Karachi city were collected (50 samples each from muscles, lymph nodes, and minced beef). The samples were cultured according to the ISO-6579-1guidlines. The overall prevalence of Salmonella strains was found to be 21.34%. A total of 56 isolates of Salmonella belonging to four serogroups (Salmonella Pullorum, Salmonella Enteritidis, Salmonella Typhimurium and Salmonella Choleraesuis) were isolated from beef muscles (12%), lymph nodes (24%) and minced beef (28%) samples collected from butcher shops (av. 21.34%). No Salmonella was detected in beef samples collected from supermarkets. S. Enteritidis contamination was highest (37.5 %), followed by S. Choleraesuis (30.4%), S. Pullorum (19.6%) and S. Typhimurium (12.5 %). Antibiotic susceptibility testing revealed that Salmonella isolates were highly resistant to Oxytetracycline (90%), Ampicillin (90.5%), Amoxicillin (81.1%), Tetracycline (76%), Neomycin, (79.8%) and Ciprofloxacin (61.4%). The Salmonella isolates examined were more susceptible to the Cephalosporin antibiotics such as Cefixime (43.2%), Cefepime (48.2) and Cefoxitin (49.8%). PCR based screening of blaTEM, blaCTX-M and blaSHV revealed that blaCTX-M and blaTEM were the dominant resistant genes in S. Enteritidis and S. Typhimurium followed by S. Pullorum and S. Choleraesuis whereas blaSHV was the least detected beta-lactamase in Salmonella isolates. Virulence genes screening revealed that at least five genes were present in all the serovars, highest being present in S. Enteritidis (12/17) and S. Typhimurium (12/17). S. Cholerasuis (5/17) carried the least number of virulence genes followed by S. Pullorum (6/17). The present data suggest that beef samples from butcher shops of Karachi city are heavily contaminated with MDR Salmonella. The presence of resistance and virulence genes in MDR strains of Salmonella may play a significant role in transmission and development of Salmonella infection in humans.
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Affiliation(s)
- Muhammad Altaf Hussain
- Key Laboratory of Dairy Science, College of Food Science, Northeast Agricultural University, Harbin 150030, China; (M.A.H.); (W.W.); (C.S.); (L.G.); (Z.L.); (T.Y.); (Z.J.)
| | - Wan Wang
- Key Laboratory of Dairy Science, College of Food Science, Northeast Agricultural University, Harbin 150030, China; (M.A.H.); (W.W.); (C.S.); (L.G.); (Z.L.); (T.Y.); (Z.J.)
| | - Changbao Sun
- Key Laboratory of Dairy Science, College of Food Science, Northeast Agricultural University, Harbin 150030, China; (M.A.H.); (W.W.); (C.S.); (L.G.); (Z.L.); (T.Y.); (Z.J.)
| | - Liya Gu
- Key Laboratory of Dairy Science, College of Food Science, Northeast Agricultural University, Harbin 150030, China; (M.A.H.); (W.W.); (C.S.); (L.G.); (Z.L.); (T.Y.); (Z.J.)
| | - Zhijing Liu
- Key Laboratory of Dairy Science, College of Food Science, Northeast Agricultural University, Harbin 150030, China; (M.A.H.); (W.W.); (C.S.); (L.G.); (Z.L.); (T.Y.); (Z.J.)
| | - Tong Yu
- Key Laboratory of Dairy Science, College of Food Science, Northeast Agricultural University, Harbin 150030, China; (M.A.H.); (W.W.); (C.S.); (L.G.); (Z.L.); (T.Y.); (Z.J.)
| | - Yasin Ahmad
- Department of Microbiology, Quaid-i-Azam University, Islamabad 45710, Pakistan;
| | - Zhanmei Jiang
- Key Laboratory of Dairy Science, College of Food Science, Northeast Agricultural University, Harbin 150030, China; (M.A.H.); (W.W.); (C.S.); (L.G.); (Z.L.); (T.Y.); (Z.J.)
| | - Juncai Hou
- Key Laboratory of Dairy Science, College of Food Science, Northeast Agricultural University, Harbin 150030, China; (M.A.H.); (W.W.); (C.S.); (L.G.); (Z.L.); (T.Y.); (Z.J.)
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Siriken B, Al G, Erol I. Prevalence and Antibiotic Resistance of Salmonella Enteritidis and Salmonella Typhimurium in Ground Beef and Meatball Samples in Samsun, Turkey. Microb Drug Resist 2019; 26:136-144. [PMID: 31453743 DOI: 10.1089/mdr.2018.0481] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The aims of this study were to evaluate the prevalence of Salmonella spp., including S. Enteritidis and S. Typhimurium, their antibiotic resistance profiles, and the presence/absence of class 1 integron (intI1) in 50 raw ground beef and 50 raw, meatball samples collected in the Samsun Province, Turkey. For the detection of Salmonella, conventional culture technique and PCR assay were used. The antibiotic resistance profiles of the isolates against nine antibiotics were tested. Salmonella spp. was detected in 20 (n = 86 isolates) samples, namely 12 ground beef and 8 meatball samples. Salmonella Enteritidis (n = 12; 24 isolates) or S. Typhimurium (n = 3; 6 isolates) was detected in 15 (75.00%, n = 30 isolates) samples. At least one species-specific gene (oriC or invA) was detected in the isolates. All isolates were sensitive to two of the third-generation cephalosporins and also nalidixic acid. There was a different level of multidrug resistance (MDR) between S. Enteritidis and Typhimurium isolates. Class 1 integron was detected in four samples (n = 7 isolates); seven isolates were S. Enteritidis and four out of the seven S. Enteritidis isolates were also MDR. In conclusion, the presence of Salmonella, particularly S. Enteritidis and S. Typhimurium, in ground beef and meatballs may cause foodborne infections. The presence of antibiotic-resistant Salmonella and S. Enteritidis with the Cls1integron is important for horizontal antibiotic gene transfer.
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Affiliation(s)
- Belgin Siriken
- Department of Aquatic Animal Diseases and Faculty of Veterinary Medicine, Ondokuz Mayıs University, Samsun, Turkey
| | - Gökhan Al
- Department of Food Hygiene and Technology, Faculty of Veterinary Medicine, Ondokuz Mayıs University, Samsun, Turkey
| | - Irfan Erol
- Faculty of Health Sciences, Eastern Mediterranean University, Gazimagusa, Turkey
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Tolerance to benzalkonium chloride and antimicrobial activity of Butia odorata Barb. Rodr. extract in Salmonella spp. isolates from food and food environments. Food Res Int 2019; 116:652-659. [DOI: 10.1016/j.foodres.2018.08.092] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 07/21/2018] [Accepted: 08/19/2018] [Indexed: 11/23/2022]
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Gad AH, Abo-Shama UH, Harclerode KK, Fakhr MK. Prevalence, Serotyping, Molecular Typing, and Antimicrobial Resistance of Salmonella Isolated From Conventional and Organic Retail Ground Poultry. Front Microbiol 2018; 9:2653. [PMID: 30455678 PMCID: PMC6230656 DOI: 10.3389/fmicb.2018.02653] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Accepted: 10/17/2018] [Indexed: 01/23/2023] Open
Abstract
Ground poultry is marketed as a healthier alternative to ground beef despite the fact that poultry is a major source of foodborne Salmonella. The objectives of this study were to determine the prevalence of Salmonella in Oklahoma retail ground poultry and to characterize representative isolates by serotyping, antimicrobial resistance, PFGE patterns, and large plasmid profiling. A total of 199 retail ground poultry samples (150 ground turkey and 49 ground chicken) were investigated. The overall prevalence of Salmonella in ground poultry was 41% (82/199), and the incidence in conventional samples (47%, 66/141) was higher than in organic samples (27%, 16/58). The prevalence of Salmonella in organic ground chicken and organic ground turkey was 33% (3/9) and 26% (13/49), respectively. Twenty six Salmonella isolates (19 conventional and 7 organic) were chosen for further characterization. The following six serotypes and number of isolates per serotype were identified as follows: Tennessee, 8; Saintpaul, 4; Senftenberg, 4; Anatum, 4 (one was Anatum_var._15+); Ouakam, 3; and Enteritidis, 3. Resistance to 16 tested antimicrobials was as follows: gentamycin, 100% (26/26); ceftiofur, 100% (26/26); amoxicillin/clavulanic acid, 96% (25/26); streptomycin, 92% (24/26); kanamycin, 88% (23/26); ampicillin, 85% (22/26); cephalothin, 81% (21/26); tetracycline, 35% (9/26); sulfisoxazole, 27% (7/26); nalidixic acid, 15% (4/26); and cefoxitin, 15% (4/26). All isolates were susceptible to amikacin, chloramphenicol, ceftriaxone, and trimethoprim/sulfamethoxazole. All screened isolates were multidrug resistant (MDR) and showed resistance to 4-10 antimicrobials; isolates from organic sources showed resistance to 5-7 antimicrobials. PFGE was successful in clustering the Salmonella isolates into distinct clusters that each represented one serotype. PFGE was also used to investigate the presence of large plasmids using S1 nuclease digestion. A total of 8/26 (31%) Salmonella isolates contained a ∼100 Kb plasmid that was present in all Anatum and Ouakam isolates. In conclusion, the presence of multidrug resistant Salmonella with various serotypes, PFGE profiles, and large plasmids in ground poultry stresses the importance of seeking novel interventions to reduce the risk of this foodborne pathogen. Multidrug resistance (MDR) is considered a high additional risk and continued surveillance at the retail level could minimize the risk for the consumer.
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Affiliation(s)
- Ahmed H. Gad
- Department of Biological Science, The University of Tulsa, Tulsa, OK, United States
| | - Usama H. Abo-Shama
- Department of Biological Science, The University of Tulsa, Tulsa, OK, United States
- Microbiology and Immunology Department, Faculty of Veterinary Medicine, Sohag University, Sohag, Egypt
| | | | - Mohamed K. Fakhr
- Department of Biological Science, The University of Tulsa, Tulsa, OK, United States
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Kassem A, Meade J, Gibbons J, McGill K, Walsh C, Lyng J, Whyte P. Evaluation of chemical immersion treatments to reduce microbial populations in fresh beef. Int J Food Microbiol 2017; 261:19-24. [DOI: 10.1016/j.ijfoodmicro.2017.08.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Revised: 07/20/2017] [Accepted: 08/15/2017] [Indexed: 11/16/2022]
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Manyori CI, Mumba C, Muma JB, Mwale MM, Munyeme M, Bwanga EK, Häsler B, Rich KM, Skjerve E. Quantitative risk assessment of developing salmonellosis through consumption of beef in Lusaka Province, Zambia. Food Control 2017. [DOI: 10.1016/j.foodcont.2016.10.027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Ed-Dra A, Filali FR, Karraouan B, El Allaoui A, Aboulkacem A, Bouchrif B. Prevalence, molecular and antimicrobial resistance of Salmonella isolated from sausages in Meknes, Morocco. Microb Pathog 2017; 105:340-345. [PMID: 28258000 DOI: 10.1016/j.micpath.2017.02.042] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2016] [Revised: 02/11/2017] [Accepted: 02/13/2017] [Indexed: 01/26/2023]
Abstract
Salmonella is among the most important food borne pathogens worldwide contaminating a wide range of animal products including meat products. The aims of this study go through two steps: The first step is to estimate the proportion of sausages products contaminated with Salmonella in Meknes city (Morocco), which were collected from various shopping sites: butchery, street vendors, supermarket and souk (Weekly market combines the population of the small villages around Meknes city). The second one is to identify serovars, to determine the antimicrobials resistance patterns of isolates and to detect the invA and spvC genes. 34 (21.79%) Salmonella were isolated, recovered 4 serogroups and 12 serotypes. The most prevalent serotypes were Salmonella Corvallis (23.53%) and Salmonella Kentucky (17.65%). All Salmonella isolates were tested for their susceptibility to 18 selected antimicrobials agents, of which 100% were resistant to at least one antimicrobial, 85.30% (29/34) were resistant to two or more antimicrobials and 44.12% (15/34) were resistant to at least three antimicrobials. All Salmonella are resistant to ampicillin, 76.47% to streptomycin, 20.59% to sulfonamides, 17.65% to Tetracycline and 11.77% to Ofloxacin. The "ACSSuT" penta-resistance pattern was observed in tow of the Salmonella Typhimurium strains. In addition, this study showed that all Salmonella strains (34) were positive for invasion gene invA and negative for the virulence gene spvC.
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Affiliation(s)
- Abdelaziz Ed-Dra
- Equipe de Microbiologie et Santé, Laboratoire de Chimie-Biologie Appliquées à l'Environnement, Université Moulay Ismail Faculté des Sciences, B.P. 11201, Zitoune Meknès, Morocco
| | - Fouzia Rhazi Filali
- Equipe de Microbiologie et Santé, Laboratoire de Chimie-Biologie Appliquées à l'Environnement, Université Moulay Ismail Faculté des Sciences, B.P. 11201, Zitoune Meknès, Morocco.
| | - Bouchra Karraouan
- Laboratoire de microbiologie et d'hygiène des aliments et des eaux, Institut Pasteur in Morocco, 1 place Louis Pasteur, Casablanca 20100, Morocco
| | - Abdellah El Allaoui
- Equipe de Microbiologie et Santé, Laboratoire de Chimie-Biologie Appliquées à l'Environnement, Université Moulay Ismail Faculté des Sciences, B.P. 11201, Zitoune Meknès, Morocco
| | - Amal Aboulkacem
- Laboratoire régional de diagnostic épidémiologique et d'hygiène du milieu, région Meknès-Tafilalet, Meknès 50000, Morocco
| | - Brahim Bouchrif
- Laboratoire de microbiologie et d'hygiène des aliments et des eaux, Institut Pasteur in Morocco, 1 place Louis Pasteur, Casablanca 20100, Morocco
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Okorie-Kanu OJ, Ezenduka EV, Okorie-Kanu CO, Ugwu LC, Nnamani UJ. Occurrence and antimicrobial resistance of pathogenic Escherichia coli and Salmonella spp. in retail raw table eggs sold for human consumption in Enugu state, Nigeria. Vet World 2016; 9:1312-1319. [PMID: 27956787 PMCID: PMC5146316 DOI: 10.14202/vetworld.2016.1312-1319] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Accepted: 10/24/2016] [Indexed: 01/08/2023] Open
Abstract
AIM This study was conducted to investigate the occurrence of pathogenic Escherichia coli and Salmonella species in retail raw table eggs sold for human consumption in Enugu State and to determine the resistance of these pathogens to antimicrobials commonly used in human and veterinary practices in Nigeria. MATERIALS AND METHODS A total of 340 raw table eggs comprising 68 composite samples (5 eggs per composite sample) were collected from five selected farms (13 composite samples from the farms) and 10 retail outlets (55 composite samples from the retail outlets) in the study area over a period of 4-month (March-June, 2014). The eggs were screened for pathogenic E. coli and Salmonella species following standard procedures within 24 h of sample collection. Isolates obtained were subjected to in-vitro antimicrobial susceptibility test with 15 commonly used antimicrobials using the disk diffusion method. RESULTS About 37 (54.4%) and 7 (10.3%) of the 68 composite samples were positive for pathogenic E. coli and Salmonella species, respectively. The shells showed significantly higher (p<0.05) contaminations than the contents for both microorganisms. The eggs from the farms showed higher contamination with pathogenic E. coli than eggs from the retail outlets while the reverse was the case for Salmonella species even though they were not significant (p>0.05). The organisms obtained showed a multiple drug resistance. They were completely resistant to nitrofurantoin, sulfamethoxazole/trimethoprim, penicillin G and oxacillin. In addition to these, Salmonella spp. also showed 100% resistance to tetracycline. The pathogenic E. coli isolates obtained were 100% susceptible to gentamicin, neomycin, ciprofloxacin, and amoxicillin-clavulanic acid while Salmonella spp. showed 100% susceptibility to erythromycin, neomycin, and rifampicin. Both organisms showed varying degrees of resistance to streptomycin, amoxicillin, vancomycin, and doxycycline. CONCLUSION From the results of the study, it can be concluded that the raw table eggs marketed for human consumption in Enugu State, Nigeria is contaminated with pathogenic E. coli and Salmonella species that showed multiple drug resistance to antimicrobial agents commonly used in veterinary and human practice.
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Affiliation(s)
- O. Josephine Okorie-Kanu
- Department of Veterinary Public Health and Preventive Medicine, Faculty of Veterinary Medicine, University of Nigeria, Nsukka, Enugu State, Nigeria
| | - E. Vivienne Ezenduka
- Department of Veterinary Public Health and Preventive Medicine, Faculty of Veterinary Medicine, University of Nigeria, Nsukka, Enugu State, Nigeria
| | - C. Onwuchokwe Okorie-Kanu
- Department of Veterinary Pathology, Michael Okpara University of Agriculture, Umudike, Abia State, Nigeria
| | - L. Chinweokwu Ugwu
- Department of Veterinary Public Health and Preventive Medicine, Faculty of Veterinary Medicine, University of Nigeria, Nsukka, Enugu State, Nigeria
| | - U. John Nnamani
- Department of Veterinary Public Health and Preventive Medicine, Faculty of Veterinary Medicine, University of Nigeria, Nsukka, Enugu State, Nigeria
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15
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Rodriguez JM, Rondón IS, Verjan N. Serotypes of Salmonella in Broiler Carcasses Marketed at Ibague, Colombia. BRAZILIAN JOURNAL OF POULTRY SCIENCE 2015. [DOI: 10.1590/1516-635x1704545-552] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- JM Rodriguez
- University of Tolima, Colombia; University of Tolima, Colombia
| | - IS Rondón
- University of Tolima, Colombia; University of Tolima, Colombia
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Abakpa G, Umoh V, Ameh J, Yakubu S, Kwaga J, Kamaruzaman S. Diversity and antimicrobial resistance of Salmonella enterica isolated from fresh produce and environmental samples. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.enmm.2014.11.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Villegas-Guzman P, Silva-Agredo J, Giraldo-Aguirre AL, Flórez-Acosta O, Petrier C, Torres-Palma RA. Enhancement and inhibition effects of water matrices during the sonochemical degradation of the antibiotic dicloxacillin. ULTRASONICS SONOCHEMISTRY 2015; 22:211-9. [PMID: 25069890 DOI: 10.1016/j.ultsonch.2014.07.006] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Revised: 07/06/2014] [Accepted: 07/06/2014] [Indexed: 05/09/2023]
Abstract
The sonochemical degradation of dicloxacillin (DXC) was studied in both synthetic and natural waters. Degradation routes and the effect of experimental conditions such as pH, initial DXC concentration and ultrasonic power were evaluated. Experiments were carried out with a fixed frequency (600kHz). The best performances were achieved using acidic media (pH=3) and high power (60W). The degradation process showed pseudo-first order kinetics as described by the Okitsu model. To evaluate water matrix effects, substrate degradation, in the presence of Fe(2+) and organic compounds such as glucose and 2-propanol, was studied. A significant improvement was achieved with Fe(2+) (1.0mM). Inhibition of the degradation process was observed at a relatively high concentration of 2-propanol (4.9mM), while glucose did not show any effect. Natural water showed an interesting effect: for a low concentration of DXC (6.4μM), an improvement in the degradation process was observed, while at a higher concentration of DXC (0.43mM), degradation was inhibited. Additionally, the extent of degradation of the process was evaluated through the analysis of chemical oxygen demand (COD), antimicrobial activity, total organic carbon (TOC) and biochemical oxygen demand (BOD5). A 30% removal of COD was achieved after the treatment and no change in the TOC was observed. Antimicrobial activity was eliminated after 360min of ultrasonic treatment. After 480min of treatment, a biodegradable solution was obtained.
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Affiliation(s)
- Paola Villegas-Guzman
- Grupo de Investigación en Remediación Ambiental y Biocatálisis, Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquía, A.A. 1226 Medellín, Colombia
| | - Javier Silva-Agredo
- Grupo de Investigación en Remediación Ambiental y Biocatálisis, Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquía, A.A. 1226 Medellín, Colombia
| | - Ana L Giraldo-Aguirre
- Grupo de Investigación en Diseño y Formulación de Medicamentos, Cosméticos y Afines (DYFOMECO), Facultad de Química Farmaceútica, Universidad de Antioquia, A.A. 1226 Medellín, Colombia
| | - Oscar Flórez-Acosta
- Grupo de Investigación en Diseño y Formulación de Medicamentos, Cosméticos y Afines (DYFOMECO), Facultad de Química Farmaceútica, Universidad de Antioquia, A.A. 1226 Medellín, Colombia
| | - Christian Petrier
- Laboratoire Rhéologie et Procédés, Grenoble, France; King Abdulaziz University, Jeddah, Saudi Arabia
| | - Ricardo A Torres-Palma
- Grupo de Investigación en Remediación Ambiental y Biocatálisis, Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquía, A.A. 1226 Medellín, Colombia.
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