Antimicrobial Susceptibility of Foodborne Pathogens in Organic or Natural Production Systems: An Overview

Campylobacteris one of the most important foodborne pathogens that cause bacterial gastroenteritis.This study was conducted to investigate the prevalence and antimicrobial resistance ofCampylobacterin conventional and organic retail poultry samples purchased from grocery stores in Tulsa, Oklahoma.One hundred and fifty six chilled retail chicken samples (85 conventional and 71 organic) and 65 chilled retail conventional turkey samples were collected in this study. The prevalence ofCampylobacterin the conventional chicken samples 32/85 (38%) was higher than in the organic ones 21/71 (30%). The prevalence ofCampylobacterin the conventional turkey samples was 11/65 (17%). Of the 53 positive chicken samples, 42 wereC. jejuni, 8 wereC. coliand three isolates were contaminated with both species. Of the 11 positive turkey samples, 8 containedC. jejuniand 3 harboredC. coliisolates. The antimicrobial susceptibility of one hundred and forty nine recoveredCampylobacterisolates (130 chickens and 19 turkeys) towards sixteen antimicrobials was determined. The majority of the recovered turkey isolates (13/19) showed resistance to more than 7 antimicrobials while most of the recovered chicken ones (82/130) were resistant to 5 to 7 antimicrobials. Multidrug resistance was not limited to isolates from conventional sources but was also available in isolates of an organic background and was generally lower inC. jejuniisolates when compared to theC. coliones.

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Prevalence, antimicrobial susceptibility pattern, and associated factors of Salmonella and Shigella among food handlers in Adigrat University student’s cafeteria, Northern Ethiopia, 2018

10.21203/rs.2.22938/v4 ◽

2020 ◽

Author(s):

Haftom Legese ◽

Tsega Kahsay ◽

Aderajew Gebrewahd ◽

Brhane Berhe ◽

Berhane Fseha ◽

...

Keyword(s):

Foodborne Pathogens ◽

Antimicrobial Susceptibility ◽

Associated Factors ◽

Public Health Problem ◽

Hand Washing ◽

Control Measures ◽

Major Public Health Problem ◽

Northern Ethiopia ◽

Food Handlers ◽

Cross Sectional

Abstract Background: Food handlers play a significant role in the transmission of foodborne infections. Salmonella and Shigella are the most common foodborne pathogens and their infections are a major public health problem globally. Thus, this study aimed to determine the prevalence, antimicrobial susceptibility patterns, and associated factors of Salmonella and Shigella among food handlers.Methodology: A cross-sectional study was conducted from March to August 2018 at Adigrat University student cafeteria, Northern Ethiopia. Data on socio-demographic and associated factors were collected using a structured questionnaire. Fresh stool samples were collected from 301 food handlers and transported to Adigrat University Microbiology Laboratory. Bacterial isolation and antimicrobial susceptibility test were performed using standard bacteriological methods. Data analysis was performed using SPSS version 22 and P < 0.05 with a corresponding 95% confidence interval was considered statistically significant.Results: A total of 301 food handlers were included in this study. The majority of study participants were females 265 (88.0 %). About 22 (7.3%) and 11 (3.7%) of food handlers were found to be positive for Salmonella and Shigella respectively. Hand washing after using a bathroom with water only, hand washing after using the bathroom, hand washing after touching dirty materials, hand washing before food handling, and fingernails status were significant associated factors identified. None of the Salmonella and Shigella isolates were sensitive to ampicillin. On the other hand, low resistance was found for chloramphenicol, ceftriaxone, and ciprofloxacin.Conclusion: The present study revealed that the prevalence of Salmonella and Shigella among food handlers was 22 (7.3%) and 11 (3.7%) respectively. Such colonized food handlers can contaminate food, drinks and could serve as a source of infection to consumers via the food chain. This indicates that there is a need for strengthened infection control measures to prevent Salmonella and Shigella transmission in the students’ cafeteria.

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Prevalence, antimicrobial susceptibility pattern, and associated factors of Salmonella and Shigella among food handlers in Adigrat University student’s cafeteria, Northern Ethiopia, 2018

10.21203/rs.2.22938/v6 ◽

2020 ◽

Author(s):

Haftom Legese ◽

Tsega Kahsay ◽

Aderajew Gebrewahd ◽

Brhane Berhe ◽

Berhane Fseha ◽

...

Keyword(s):

Foodborne Pathogens ◽

Antimicrobial Susceptibility ◽

Associated Factors ◽

Public Health Problem ◽

Hand Washing ◽

Control Measures ◽

Major Public Health Problem ◽

Northern Ethiopia ◽

Food Handlers ◽

Cross Sectional

Abstract Background: Food handlers play a significant role in the transmission of foodborne infections. Salmonella and Shigella are the most common foodborne pathogens and their infections are a major public health problem globally. Thus, this study aimed to determine the prevalence, antimicrobial susceptibility patterns, and associated factors of Salmonella and Shigella colonization among food handlers.Methodology: A cross-sectional study was conducted from March to August 2018 at Adigrat University student cafeteria, Northern Ethiopia. Data on socio-demographic and associated factors were collected using a structured questionnaire. Fresh stool samples were collected from 301 food handlers and transported to Adigrat University Microbiology Laboratory. Bacterial isolation and antimicrobial susceptibility test were performed using standard bacteriological methods. Data analysis was performed using SPSS version 22 and P < 0.05 where a corresponding 95% confidence interval was considered statistically significant.Results: A total of 301 food handlers were included in this study. The majority of study participants were females 265 (88.0 %). About 22 (7.3%) and 11 (3.7%) of food handlers were found to be positive for Salmonella and Shigella respectively. Hand washing after using a bathroom with water only, no hand washing after using the bathroom, no hand washing after touching dirty materials, no hand washing before food handling, and untrimmed fingernails were significant associated factors identified. None of the Salmonella and Shigella isolates were sensitive to ampicillin, yet low resistance against chloramphenicol, ceftriaxone, and ciprofloxacin was found. Conclusion: The present study revealed that the prevalence of Salmonella and Shigella among food handlers was 22 (7.3%) and 11 (3.7%) respectively. Such colonized food handlers can contaminate food, and drinks and could serve as a source of infection to consumers. This indicates that there is a need for strengthened infection control measures to prevent Salmonella and Shigella transmission in the students’ cafeteria.

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Antimicrobial Susceptibility and Genomic Analysis of Aliarcobacter cibarius and Aliarcobacter thereius, Two Rarely Detected Aliarcobacter Species

Frontiers in Cellular and Infection Microbiology ◽

10.3389/fcimb.2021.532989 ◽

2021 ◽

Vol 11 ◽

Author(s):

Ingrid Hänel ◽

Eva Müller ◽

Belén González Santamarina ◽

Herbert Tomaso ◽

Helmut Hotzel ◽

...

Keyword(s):

Amino Acid ◽

Foodborne Pathogens ◽

Antimicrobial Susceptibility ◽

Amino Acid Change ◽

Genomic Analysis ◽

Whole Genome ◽

Genome Sequences ◽

Phenotypic Analysis ◽

Phenotypic Resistance ◽

Reference Strains

Aliarcobacter cibarius and Aliarcobacter thereius are two rarely detected Aliarcobacter species. In the study, we analyzed the antimicrobial susceptibility and provide detailed insights into the genotype and phylogeny of both species using whole-genome sequencing. Thermophilic Campylobacter species are the most common bacterial foodborne pathogens causing gastroenteritis in humans worldwide. The genus Aliarcobacter is part of the Campylobacteraceae family and includes the species Aliarcobacter butzleri, Aliarcobacter cryaerophilus, Aliarcobacter skirrowii, and the rarely described Aliarcobacter cibarius, Aliarcobacter faecis, Aliarcobacter lanthieri, Aliarcobacter thereius, and Acrobarter trophiarum. Aliarcobacter are emergent enteropathogens and potential zoonotic agents. Here, we generated, analyzed, and characterized whole-genome sequences of Aliarcobacter cibarius and Aliarcobacter thereius. They were isolated from water poultry farms in Germany, cultured and identified by MALDI-TOF MS. With PCR the identity was verified. Antibiotic susceptibility testing was carried out with erythromycin, ciprofloxacin, doxycycline, tetracycline, gentamicin, streptomycin, ampicillin, and cefotaxime using the gradient strip method (E-test). Whole-genome sequences were generated including those of reference strains. Complete genomes for six selected strains are reported. These provide detailed insights into the genotype. With these, we predicted in silico known AMR genes, virulence-associated genes, and plasmid replicons. Phenotypic analysis of resistance showed differences between the presence of resistance genes and the prediction of phenotypic resistance profiles. In Aliarcobacter butzleri, the nucleotide sequence of the gyrA gene (DQ464331) can show a signature mutation resulting in an amino acid change T85>I. Acrobarter cibarius and Acrobarter thereius showed the same gene as assessed by similarity annotation of the mutations 254C>G. Most of the isolates were found to be sensitive to ciprofloxacin. The ciprofloxacin-resistant Aliarcobacter thereius isolate was associated with the amino acid change T85>I. But this was not predicted with antibiotic resistance databases, before. Ultimately, a phylogenetic analysis was done to facilitate in future outbreak analysis.

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Prevalence, antimicrobial susceptibility pattern, and associated factors of Salmonella and Shigella among food handlers in Adigrat University student’s cafeteria, Northern Ethiopia, 2018

10.21203/rs.2.22938/v2 ◽

2020 ◽

Author(s):

Haftom Legese ◽

Tsega Kahsay ◽

Aderajew Gebrewahd ◽

Brhane Berhe ◽

Berhane Fseha ◽

...

Keyword(s):

Foodborne Pathogens ◽

Antimicrobial Susceptibility ◽

Associated Factors ◽

Public Health Problem ◽

Hand Washing ◽

Control Measures ◽

Major Public Health Problem ◽

Northern Ethiopia ◽

Food Handlers ◽

Cross Sectional

Abstract Background: Food handlers play a significant role in the transmission of foodborne infection. Salmonella and Shigella are the most common foodborne pathogens and their infections are a major public health problem of the globe. Thus, this study was aimed to determine the prevalence, antimicrobial susceptibility patterns, and associated factors of Salmonella and Shigella among food handlers. Methodology: A cross-sectional study was conducted from March to August 2018 at Adigrat University student cafeteria, Northern Ethiopia. Data on socio-demographic and associated factors were collected using a structured questionnaire. Fresh stool samples were collected from 301 food handlers and transported to Adigrat University Microbiology Laboratory. Bacterial isolation and antimicrobial susceptibility test were performed using standard bacteriological methods. Data analysis was performed using SPSS version 22 and P < 0.05 with a corresponding 95% confidence interval was considered statistically significant. Results: A total of 301 food handlers were included in this study. The majority of study participants were females 265 (88.0 %). About 22 (7.3%) and 11 (3.7%) of food handlers were found to be positive for Salmonella and Shigella respectively. Hand washing after using a bathroom with water only, hand washing after using the bathroom, hand washing after touching dirty materials, hand washing before food handling and fingernails status were significant associated factors identified. None of the Salmonella and Shigella isolates was sensitive to ampicillin. On the other hand, low resistance was found for chloramphenicol, ceftriaxone, and ciprofloxacin. Conclusion: The present study revealed that the prevalence of Salmonella and Shigella among food handlers found to be 22 (7.3%) and 11 (3.7%) respectively. Such colonized food handlers can contaminate food, drinks and could serve as a source of infection to consumers via the food chain. This indicates that the need for strengthened infection control measures to prevent Salmonella and Shigella transmission in the students’ cafeteria.

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Determination of Antimicrobial Resistance Patterns in Salmonella from Commercial Poultry as Influenced by Microbiological Culture and Antimicrobial Susceptibility Testing Methods

Microorganisms ◽

10.3390/microorganisms9061319 ◽

2021 ◽

Vol 9 (6) ◽

pp. 1319

Author(s):

Xi Wang ◽

W. Evan Chaney ◽

Hilary O. Pavlidis ◽

James P. McGinnis ◽

J. Allen Byrd ◽

...

Keyword(s):

Antimicrobial Resistance ◽

Nalidixic Acid ◽

Foodborne Pathogens ◽

Antimicrobial Susceptibility ◽

Susceptibility Testing ◽

Antimicrobial Susceptibility Testing ◽

Testing Methods ◽

Convenience Sample ◽

Selective Enrichment ◽

Lower Resistance

Monitoring antimicrobial resistance of foodborne pathogens in poultry is critical for food safety. We aimed to compare antimicrobial resistance phenotypes in Salmonella isolated from poultry samples as influenced by isolation and antimicrobial susceptibility testing methods. Salmonella isolates were cultured from a convenience sample of commercial broiler ceca with and without selective broth enrichment, and resistance phenotypes were determined for 14 antimicrobials using the Sensititre® platform and a qualitative broth breakpoint assay. The broth breakpoint method reported higher resistance to chloramphenicol, sulfisoxazole, and the combination of trimethoprim and sulfamethoxazole, and lower resistance to streptomycin as compared to the Sensititre® assay in trial one. Selective enrichment of samples containing Salmonella in Rappaport-Vassiliadis broth reported lowered detectable resistance to amoxicillin/clavulanic acid, ampicillin, azithromycin, cefoxitin, ceftriaxone, nalidixic acid, and meropenem, and increased resistance to streptomycin and tetracycline than direct-plating samples in trial one. Using matched isolates in trial two, the Sensititre® assay reported higher resistance to chloramphenicol and gentamicin, and lower resistance to nalidixic acid as compared to the broth breakpoint method. These results suggest methodology is a critical consideration in the detection and surveillance of antimicrobial resistance phenotypes in Salmonella isolates from poultry samples and could affect the accuracy of population or industry surveillance insights and intervention strategies.

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Molecular Epidemiology and Resistance Profile of Salmonella Isolated from Chicken, Pork and the Environment at Abattoirs and Supermarkets in Chongqing, China

10.21203/rs.2.13800/v2 ◽

2019 ◽

Author(s):

Tingting Chen ◽

Jiali Jiang ◽

Chao Ye ◽

Jianhua Xie ◽

Xia Chen ◽

...

Keyword(s):

Public Health ◽

Foodborne Pathogens ◽

Antimicrobial Susceptibility ◽

Susceptibility Testing ◽

Multidrug Resistant ◽

Isolation Rate ◽

Production Chain ◽

Pork Production ◽

Human Salmonellosis ◽

Sequence Types

Abstract Background: Salmonella is one of the most important foodborne pathogens, causing outbreaks of human salmonellosis worldwide. Owing to large scales of consumption markets, pork and poultry that contaminated by Salmonella could pose a tremendous threat to public health. The aim of this study was to investigate the contamination of Salmonella from chicken, pork and the environment in slaughtering and retail processes in Chongqing, China. Results: A total of 115 Salmonella isolates were recovered from 1112 samples collected from pork, chicken and the environment. Compared with the isolation rate of samples from chicken (9.50%) and the environment (6.23%), samples from pork had a significant higher isolation rate (44.00%). The isolation rates in slaughterhouses (10.76%) and in supermarkets (10.07%) showed no statistical different. 30 different serotypes were identified among all the isolates. S. Derby (n=26), S. London (n=16) and S. Rissen (n=12) were the dominant serotypes. Antimicrobial susceptibility testing revealed that 73.04% isolates were resistant to tetracycline, followed by 66.96% to ampicillin and 59.13% to doxycycline. More than half (50.43%) of the isolates were multidrug resistant (MDR), and most of the MDR isolates were from supermarkets. Multilocus sequence typing results showed 24 out of 115 isolates were ST40, which was the most prevalent. Furthermore, isolates from supermarkets had 20 different sequence types while isolates from slaughterhouses only had 8 different sequence types. Conclusion: Our study highlighted that Salmonella was more frequently isolated in pork production chain than that of chicken. Compared with isolates from slaughterhouses, isolates from supermarkets had more MDR profiles and represented a wider range of serotypes and sequence types, indicating that the retail process had more diverse sources of Salmonella contamination than that of slaughtering process.

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Antimicrobial Susceptibility and Frequency of bla and qnr Genes in Salmonella enterica Isolated from Slaughtered Pigs

Antibiotics ◽

10.3390/antibiotics10121442 ◽

2021 ◽

Vol 10 (12) ◽

pp. 1442

Author(s):

Alyzza Marie B. Calayag ◽

Kenneth W. Widmer ◽

Windell L. Rivera

Keyword(s):

Antimicrobial Resistance ◽

Resistance Genes ◽

Foodborne Pathogens ◽

Antimicrobial Susceptibility ◽

Salmonella Enterica ◽

Multidrug Resistant ◽

Major Product ◽

Hog Industry ◽

Antimicrobial Resistance Genes ◽

Severe Infections

Salmonella enterica is known as one of the most common foodborne pathogens worldwide. While salmonellosis is usually self-limiting, severe infections may require antimicrobial therapy. However, increasing resistance of Salmonella to antimicrobials, particularly fluoroquinolones and cephalosporins, is of utmost concern. The present study aimed to investigate the antimicrobial susceptibility of S. enterica isolated from pork, the major product in Philippine livestock production. Our results show that both the qnrS and the blaTEM antimicrobial resistance genes were present in 61.2% of the isolates. While qnrA (12.9%) and qnrB (39.3%) were found less frequently, co-carriage of blaTEM and one to three qnr subtypes was observed in 45.5% of the isolates. Co-carriage of blaTEM and blaCTX-M was also observed in 3.9% of the isolates. Antimicrobial susceptibility testing revealed that the majority of isolates were non-susceptible to ampicillin and trimethoprim/sulfamethoxazole, and 13.5% of the isolates were multidrug-resistant (MDR). MDR isolates belonged to either O:3,10, O:4, or an unidentified serogroup. High numbers of S. enterica carrying antimicrobial resistance genes (ARG), specifically the presence of isolates co-carrying resistance to both β-lactams and fluoroquinolones, raise a concern on antimicrobial use in the Philippine hog industry and on possible transmission of ARG to other bacteria.

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