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Bacterial pathogens and factors associated with salmonella contamination in hybrid red tilapia(Oreochromis spp.)cultivated in a cage culture system

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Food Quality and Safety 2022年第3期6卷 404-415页

作者： Varangkana Thaotumpitak Jarukorn Sripradite Edward R.Atwill Surapun Tepaamorndech Saharuetai Jeamsripong Research Unit in Microbial Food Safety and Antimicrobial Resistance Department of Veterinary Public HealthFaculty of Veterinary ScienceChulalongkorn UniversityBangkokThailand Department of Social and Applied Science College of Industrial TechnologyKing Mongkut's University of Technology North BangkokBangkokThailand Department of Population Health and Reproduction School of Veterinary MedicineUniversity of CaliforniaDavisDavisCAUSA Functional Ingredients and Food Innovation Research Group National Center for Genetic Engineering and Biotechnology(BIOTEC)Pathum ThaniThailand Department of Microbiology Faculty of MedicineChulalongkorn UniversityKing Chulalongkorn Memorial HospitalBangkokThailanc

Microbial food safety in cultured tilapia remains a challenge to public health worldwide,due in part to intensive aquaculture leading to poor water quality and high organic matter deposition.This study aimed to determine the prevalence of indicator and potential pathogenic bacteria in hybrid red tilapia(Oreochromis spp.)and their cultivation water and to identify environmental parameters and other bacterial contaminants associated with salmonella contamination.A total of 120 fish were sampled,which were partitioned into fish carcasses(n=120),muscle(n=120),intestine(n=120),liverandkidney(n=120),and cultivationwater(n=120)from three commercial farms in westernThailand from October2019 to November 2020.The prevalence of fecal coliforms and Escherichia coli(E.col)in these 600 samples was 74.8%and 56.7%,respectively.The prevalence of salmonella,Vibrio cholerae(V.cholerae),Aeromonas hydrophila,and Vibrio vulnificus(V.vulnificus)was 23.0%,17.5%,2.5%,and 1.7%,respectively.None of the samples tested positive for Streptococcus agalactiae.Cultivation water exhibited a high prevalence for salmonella(58.3%).Among fish samples,salmonella had the highest prevalence at 14.1%,which was mainly from fish intestine.There was a significant association of salmonella with the presence of fecal coliforms,E.coli,V.cholerae,and V.vulnificus.The predominant serovars of salmonella included Saintpaul,Neukoelln,Escanaba,and Papuana.Grazing ducks that were raised in proximity to these cultured tilapia shared the same isolates of salmonella based on the similarity of their rep-PCR DNA fingerprints,suggesting that ducks may function as either a biological reservoir for tilapia or at minimum participate in the environmental replication of this strain of salmonella.Taken together,the results suggest that the environment used for tilapia aquaculture may be contaminated with pathogenic bacteria;therefore,food safety precautions are needed during processing,transportation,cooking,and consumption.

关键词： Aeromonas spp grazing duck salmonella spp tilapia Vibrio spp

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Edaphoclimatic seasonal trends and variations of the salmonella spp. infection in Northwestern Mexico

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Infectious Disease Modelling 2021年第1期6卷 805-819页

作者： Yasiri Mayeli Flores Monter Andrea Chaves Beatriz Arellano-Reynoso Andres Mauricio Lopez-Perez Humberto Suzan-Azpiri Gerardo Suzan Facultad de Medicina Veterinaria y Zootecnia Universidad Nacional Autonoma de MexicoMexico City04510Mexico Escuela de Biología Universidad de Costa RicaSan Jose11501-2060Costa Rica Department of Medicine and Epidemiology School of Veterinary MedicineUniversity of CaliforniaDavisCA95695United States Laboratorio de Ecología Universidad Autonoma de Queretaro76230Mexico

Currently,salmonella spp.is the bacterium causing the highest number of food-borne diseases(FADs)in the world.It is primarily associated with contaminated water used to that irrigates crops from intensive livestock farming.However,literature emphasizes that the reservoirs for salmonella spp.remain in wildlife and there are unconventional sources or secondary reservoirs,such as soil.Human soil-borne diseases have not been modeled in spatial scenarios,and therefore it is necessary to consider soil and other climatic factors to anticipate the emergence of new strains or serotypes with potential threat to public and animal health.The objective of this research was to investigate whether edaphic and climatic factors are associated with the occurrence and prevalence of salmonella spp.in Northwestern Mexico.We estimated the potential distribution of salmonella spp.with an interpolation method of unsampled kriging areas for 15 environmental variables,considering that these factors have a seasonal dynamic of change during the year and modifications in longer periods.Subsequently,a database was generated with human salmonellosis cases reported in the epidemiological bulletins of the National System of Epidemiological Surveillance(SIVE).For the Northwest region,there were 30,595 human cases of paratyphoid and other salmonellosis reported have been reported in Baja California state,71,462 in Chihuahua,and 16,247 in Sonora from 2002 to 2019.The highest prevalence was identified in areas with higher temperatures between 35 and 37℃,and precipitation greater than 1000 mm.The edaphic variables limited the prevalence and geographical distribution of salmonella spp.,because the region is characterized by presenting a low percentage of organic matter(≤4.3),and most of the territory is classified as aridic and xeric,which implies that the humidity comprises≤180 days a year.Finally,the seasonal time series indicated that in the states of Baja California and Chihuahua the rainy quarter of the year is 18.7%and 17.01%above a typical quar

关键词： Potential distribution Soil Temperature Precipitation salmonella spp

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Evaluation of the Microbiological Quality of Poultry Imported into Togo and the Antibiotic Resistance of salmonella spp. Isolated

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Advances in Microbiology 2023年第10期13卷 499-516页

作者： Kossi Touglo Yawavi Justine Sanni Lionel Amegan Koffi Akolly Yaovi Akoula Nuto Wembo Afiwa Halatoko Adodo Sadji Bawimodom Bidjada Bouraïma Djeri Simplice Damintoti Karou Yaovi Agbekponou Ameyapoh Laboratoire de Microbiologie des Aliments de l’Eau et Produits Divers Institut National d’Hygiène (INH) Lomé Togo Laboratoire de Microbiologie et de Contrôle de la qualité des Denrées Alimentaires (LAMICODA) Université de Lomé Lomé Togo Laboratoire de Bactériologie Médicale de l’Institut National d’Hygiène (INH) Lomé Togo

In Togo, despite the government’s efforts, food requirements in terms of animal proteins are not covered by national production and are subject to huge imports of meat products. However, the hygienic quality of these imports is not guaranteed for the consumer. The aim of this study was to estimate the frequency of unhygienically unsatisfactory imported poultry and to determine the antibiotic resistance profile of salmonella spp. strains. A total of 285 samples of imported poultry, including 55 chicken thighs, 10 chicken backbones, 25 chicken wings, 5 whole chickens, 30 sausages, 35 chicken forequarters, 95 chicken drumsticks and 30 guinea fowl wings, were analyzed using standard AFNOR routine methods. The following germs were tested: Total Aerobic Mesophilic Flora (TAMF), Anaerobic-Sulfite-Reducing (ASR), Escherichia coli, Staphylococcus aureus and salmonella spp. Antibiotic susceptibility testing was carried out on salmonella spp. strains isolated using the agar disk diffusion method (CA-SFM). Results showed 100% compliance for TAMF, coagulase-positive Staphylococci and Escherichia coli. On the other hand, 3.84% and 2.46% non-compliance were recorded for ASR and salmonella respectively. Non-compliance with hygiene rules is generally thought to be the cause of meat contamination. Seven 7 strains of salmonella were isolated, 5 of which were of the OMA serogroup, and the other two of the OMB and HMB groups. Antibiotic susceptibility tests revealed resistance to certain beta-lactam antibiotics and quinolones, in particular: cefalexin (28.57%), cefoxitin (14.28%), cefuroxime (28.57%), ceftazidime (28.57%), ceftriaxone (28.57%) and nalidixic acid (28.57%). This result may be explained by the uncontrolled use of B-lactam and quinolone antibiotics in poultry farming. As salmonella spp. is a pathogenic enteric bacterium that causes food-borne illness in humans, resistance to third-generation cephalosporins remains a major public health problem.

关键词： Imported Poultry Hygienic quality salmonella spp Antibiotic Resistance Togo

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Poor hygienic conditions of butcheries and high level of microbiological contamination of meat sold in Nampula city,Mozambique

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Food and Health 2023年第2期5卷 6-12页

作者： Ndjate Kinyamba-Junior Cátia Salamandane Vanito Frei Acacio Salamandane Pompílio Vintuar Faculdade de Ciências Agrarias Universidade LúrioCamus Universitário de Unango3300 Sanga-NiassaMozambique Laboratório de Qualidade e Segurança Alimental Centro de estudos Interdisciplinares Lúrio(CEIL)Universidade LúrioCampus Universitário de Marrere4250 NampulaMozambique Faculdade de Ciências de Saúde Universidade LúrioCampus Universitário de Marrere4250 NampulaMozambique Faculdade de Geografia Universidade RovumaCampus Universitário de Napipine5440 NampulaMoçambique Centro de Extensão Inovação e Transferência de Conhecimento(CEITRAC)Universidade RovumaCampus Universitário de Napipine5440 NampulaMoçambique Faculdade de Ciências Alimentares e Agrarias Universidade RovumaCampus Universitário de Napipine5440 NampulaMozambique

The present study aimed to evaluate the hygiene practices and the quality of meat sold in butcheries in the city of Nampula,Mozambique.Of the twelve butcheries in the city,only seven participated in the study,which was divided into four categories:hygienic conditions of buildings and facilities,equipment,furniture and utensils,good handling practices for handlers,and microbiological quality of meat products.Results showed that most of the butcheries(71%)had poor hygiene conditions,such as walls with cracks and holes and lack of washbasins in the production area.In addition,the majority(71%)of butcheries used a reusable dirty cloth to clean equipment and utensils,and only 43%had a cold room or refrigerated chamber for meat conservation.Regarding personal hygiene,100%of the handlers washed and changed their clothes daily,but 71%did not properly wash their hands before handling food.Microbiological analysis revealed that 86%of the cutting tables swabs and 43%of the hand blades had E.coli counts above 4 Log,and the presence of salmonella was observed in 71%of meat samples.Overall,the study highlights the need for improvement in hygiene practices and the quality of meat sold in butcheries in Nampula.

关键词： salmonella spp poor hygienic conditions butcheries facilities Nampula meat handling

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