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      Antimicrobial resistance profiles of Salmonella isolates from human diarrhea cases in China: an eight-year surveilance study

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          Abstract

          Salmonella is widely known as one of the most common foodborne pathogens, and antibiotics remain effective in clinical therapies against its infections. To guide better clinical antibiotic treatment, we analyzed the antimicrobial resistance (AMR) profiles of a nation-wide collection of 36,822 Salmonella isolates derived from sporadic diarrhea cases in China from 2014 to 2021. A panel of 15 antibiotics, including 10 critically important and 5 highly important antimicrobial agents for human medicine based on the WHO CIA List, was selected for AMR surveillance. Salmonella enterica serovar Typhimurium, Enteritidis, I 4,[5],12:i:-, London, and Stanley were turns to be the top five serotypes from human diarrhea cases in China. Antimicrobial susceptibility testing revealed that the majority of the isolates (87.2%) were resistant to at least one antimicrobial agent, and 66.5% were multidrug resistant (MDR). Salmonella isolates were found to be highly resistant to ampicillin (73.4%) while sensitive to imipenem (98.73%). Over the eight years, the isolates were demonstrated generally an increase in resistance to ampicillin, chloramphenicol, trimethoprim-sulfamethoxazole, and azithromycin, but displayed varied resistance profiles in terms of serotypes. Stanley (0.66–27.18%) and Agona (0.78–45.30%) had lower resistance rates compared to Typhimurium (1.11–85.6%), Enteritidis (1.55–91.29%), and I 4,[5],12:i:- (1.02–94.28%). In conclusion, our results provide systematic data on the resistance characteristics of Salmonella isolates from human diarrhea cases in China. Furthermore, this data identifies priorities for the clinical treatments of antibiotics.

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          Emergence of plasmid-mediated colistin resistance mechanism MCR-1 in animals and human beings in China: a microbiological and molecular biological study.

          Yi-Yun Liu, Yang Wang, Timothy R. Walsh … (2016)
          Until now, polymyxin resistance has involved chromosomal mutations but has never been reported via horizontal gene transfer. During a routine surveillance project on antimicrobial resistance in commensal Escherichia coli from food animals in China, a major increase of colistin resistance was observed. When an E coli strain, SHP45, possessing colistin resistance that could be transferred to another strain, was isolated from a pig, we conducted further analysis of possible plasmid-mediated polymyxin resistance. Herein, we report the emergence of the first plasmid-mediated polymyxin resistance mechanism, MCR-1, in Enterobacteriaceae.
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            World Health Organization Estimates of the Global and Regional Disease Burden of 22 Foodborne Bacterial, Protozoal, and Viral Diseases, 2010: A Data Synthesis

            Martyn D. Kirk, Sara M. Pires, Robert E Black … (2015)
            Background Foodborne diseases are important worldwide, resulting in considerable morbidity and mortality. To our knowledge, we present the first global and regional estimates of the disease burden of the most important foodborne bacterial, protozoal, and viral diseases. Methods and Findings We synthesized data on the number of foodborne illnesses, sequelae, deaths, and Disability Adjusted Life Years (DALYs), for all diseases with sufficient data to support global and regional estimates, by age and region. The data sources included varied by pathogen and included systematic reviews, cohort studies, surveillance studies and other burden of disease assessments. We sought relevant data circa 2010, and included sources from 1990–2012. The number of studies per pathogen ranged from as few as 5 studies for bacterial intoxications through to 494 studies for diarrheal pathogens. To estimate mortality for Mycobacterium bovis infections and morbidity and mortality for invasive non-typhoidal Salmonella enterica infections, we excluded cases attributed to HIV infection. We excluded stillbirths in our estimates. We estimate that the 22 diseases included in our study resulted in two billion (95% uncertainty interval [UI] 1.5–2.9 billion) cases, over one million (95% UI 0.89–1.4 million) deaths, and 78.7 million (95% UI 65.0–97.7 million) DALYs in 2010. To estimate the burden due to contaminated food, we then applied proportions of infections that were estimated to be foodborne from a global expert elicitation. Waterborne transmission of disease was not included. We estimate that 29% (95% UI 23–36%) of cases caused by diseases in our study, or 582 million (95% UI 401–922 million), were transmitted by contaminated food, resulting in 25.2 million (95% UI 17.5–37.0 million) DALYs. Norovirus was the leading cause of foodborne illness causing 125 million (95% UI 70–251 million) cases, while Campylobacter spp. caused 96 million (95% UI 52–177 million) foodborne illnesses. Of all foodborne diseases, diarrheal and invasive infections due to non-typhoidal S. enterica infections resulted in the highest burden, causing 4.07 million (95% UI 2.49–6.27 million) DALYs. Regionally, DALYs per 100,000 population were highest in the African region followed by the South East Asian region. Considerable burden of foodborne disease is borne by children less than five years of age. Major limitations of our study include data gaps, particularly in middle- and high-mortality countries, and uncertainty around the proportion of diseases that were foodborne. Conclusions Foodborne diseases result in a large disease burden, particularly in children. Although it is known that diarrheal diseases are a major burden in children, we have demonstrated for the first time the importance of contaminated food as a cause. There is a need to focus food safety interventions on preventing foodborne diseases, particularly in low- and middle-income settings.
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              Restricting the use of antibiotics in food-producing animals and its associations with antibiotic resistance in food-producing animals and human beings: a systematic review and meta-analysis

              Karen Tang, Niamh Caffrey, Diego B. Nóbrega … (2017)
              Summary Background Antibiotic use in human medicine, veterinary medicine, and agriculture has been linked to the rise of antibiotic resistance globally. We did a systematic review and meta-analysis to summarise the effect that interventions to reduce antibiotic use in food-producing animals have on the presence of antibiotic-resistant bacteria in animals and in humans. Methods On July 14, 2016, we searched electronic databases (Agricola, AGRIS, BIOSIS Previews, CAB Abstracts, MEDLINE, Embase, Global Index Medicus, ProQuest Dissertations, Science Citation Index) and the grey literature. The search was updated on Jan 27, 2017. Inclusion criteria were original studies that reported on interventions to reduce antibiotic use in food-producing animals and compared presence of antibiotic-resistant bacteria between intervention and comparator groups in animals or in human beings. We extracted data from included studies and did meta-analyses using random effects models. The main outcome assessed was the risk difference in the proportion of antibiotic-resistant bacteria. Findings A total of 181 studies met inclusion criteria. Of these, 179 (99%) described antibiotic resistance outcomes in animals, and 81 (45%) of these studies were included in the meta-analysis. 21 studies described antibiotic resistance outcomes in humans, and 13 (62%) of these studies were included in the meta-analysis. The pooled absolute risk reduction of the prevalence of antibiotic resistance in animals with interventions that restricted antibiotic use commonly ranged between 10 and 15% (total range 0–39), depending on the antibiotic class, sample type, and bacteria under assessment. Similarly, in the human studies, the pooled prevalence of antibiotic resistance reported was 24% lower in the intervention groups compared with control groups, with a stronger association seen for humans with direct contact with food-producing animals. Interpretation Interventions that restrict antibiotic use in food-producing animals are associated with a reduction in the presence of antibiotic-resistant bacteria in these animals. A smaller body of evidence suggests a similar association in the studied human populations, particularly those with direct exposure to food-producing animals. The implications for the general human population are less clear, given the low number of studies. The overall findings have directly informed the development of WHO guidelines on the use of antibiotics in food-producing animals. Funding World Health Organization.
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                Author and article information

                Journal
                Title: One Health Advances
                Abbreviated Title: One Health Adv.
                Publisher: Springer Science and Business Media LLC
                ISSN (Electronic): 2731-9970
                Publication date Created: December 2023
                Publication date (Electronic): March 30 2023
                Volume: 1
                Issue: 1
                Article
                DOI: 10.1186/s44280-023-00001-3
                PubMed ID: 37521534
                SO-VID: 62cc3278-fcbd-4bc0-98ea-5f9b34d37de0
                Copyright © © 2023
                License:

                https://creativecommons.org/licenses/by/4.0

                https://creativecommons.org/licenses/by/4.0

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