scholarly journals Extraintestinal Pathogenic Escherichia coli: Virulence Factors and Antibiotic Resistance

Pathogens ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 1355
Author(s):  
Valerio M. Sora ◽  
Gabriele Meroni ◽  
Piera A. Martino ◽  
Alessio Soggiu ◽  
Luigi Bonizzi ◽  
...  
Keyword(s):  
Public Health ◽  
One Health ◽  
Production Systems ◽  
E Coli ◽  
Opportunistic Bacteria ◽  
Food Animal ◽  
Pathogenic Escherichia Coli ◽  
Resistant Strains ◽  
The One ◽  
Animal Production Systems

The One Health approach emphasizes the importance of antimicrobial resistance (AMR) as a major concern both in public health and in food animal production systems. As a general classification, E. coli can be distinguished based on the ability to cause infection of the gastrointestinal system (IPEC) or outside of it (ExPEC). Among the different pathogens, E. coli are becoming of great importance, and it has been suggested that ExPEC may harbor resistance genes that may be transferred to pathogenic or opportunistic bacteria. ExPEC strains are versatile bacteria that can cause urinary tract, bloodstream, prostate, and other infections at non-intestinal sites. In this context of rapidly increasing multidrug-resistance worldwide and a diminishingly effective antimicrobial arsenal to tackle resistant strains. ExPEC infections are now a serious public health threat worldwide. However, the clinical and economic impact of these infections and their optimal management are challenging, and consequently, there is an increasing awareness of the importance of ExPECs amongst healthcare professionals and the general public alike. This review aims to describe pathotype characteristics of ExPEC to increase our knowledge of these bacteria and, consequently, to increase our chances to control them and reduce the risk for AMR, following a One Health approach.

scholarly journals Prioritization of zoonotic diseases of public health significance in Nigeria using the one-health approach

One Health ◽  
2021 ◽  
pp. 100257
Author(s):  
Chikwe Ihekweazu ◽  
Charles Akataobi Michael ◽  
Patrick M. Nguku ◽  
Ndadilnasiya Endie Waziri ◽  
Abdulrazaq Garba Habib ◽  
...  
Keyword(s):  
Public Health ◽  
One Health ◽  
Zoonotic Diseases ◽  
Public Health Significance ◽  
Health Significance ◽  
The One

scholarly journals Molecular characterization and antimicrobial resistance of potentially human‐pathogenic Escherichia coli strains isolated from riding horses

2021 ◽  
Vol 17 (1) ◽  
Author(s):  
Pouya Reshadi ◽  
Fatemeh Heydari ◽  
Reza Ghanbarpour ◽  
Mahboube Bagheri ◽  
Maziar Jajarmi ◽  
...  
Keyword(s):  
Public Health ◽  
Escherichia Coli ◽  
Antimicrobial Resistance ◽  
Health Concern ◽  
Zoonotic Potential ◽  
Drug Resistant ◽  
Public Health Concern ◽  
E Coli ◽  
Pathogenic Escherichia Coli ◽  
Amoxicillin Clavulanic Acid

Abstract Background Transmission of antimicrobial resistant and virulent Escherichia coli (E. coli) from animal to human has been considered as a public health concern. This study aimed to determine the phylogenetic background and prevalence of diarrheagenic E. coli and antimicrobial resistance in healthy riding-horses in Iran. In this research, the genes related to six main pathotypes of E. coli were screened. Also, genotypic and phenotypic antimicrobial resistance against commonly used antibiotics were studied, then phylo-grouping was performed on all the isolates. Results Out of 65 analyzed isolates, 29.23 % (n = 19) were determined as STEC and 6.15 % (n = 4) as potential EPEC. The most prevalent antimicrobial resistance phenotypes were against amoxicillin/clavulanic acid (46.2 %) and ceftriaxone (38.5 %). blaTEM was the most detected resistance gene (98.4 %) among the isolates and 26.15 % of the E. coli isolates were determined as multi-drug resistant (MDR). Three phylo-types including B1 (76.92 %), A (13.85 %) and D (3.08 %) were detected among the isolates. Conclusions Due to the close interaction of horses and humans, these findings would place emphasis on the pathogenic and zoonotic potential of the equine strains and may help to design antimicrobial resistance stewardship programs to control the dissemination of virulent and multi-drug resistant E. coli strains in the community.

scholarly journals Antimicrobial multidrug resistance in the era of COVID-19: a forgotten plight?

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Eric Pelfrene ◽  
Radu Botgros ◽  
Marco Cavaleri
Keyword(s):  
Public Health ◽  
Multidrug Resistance ◽  
Regulatory Network ◽  
One Health ◽  
Animal Health ◽  
Antibiotic Use ◽  
Economic Conditions ◽  
Main Body ◽  
The One ◽  
The Relationship

Abstract Background Antimicrobial resistance (AMR) is a growing global problem to which the ongoing COVID-19 pandemic may further contribute. With resources deployed away from antimicrobial stewardship, evidence of substantial pre-emptive antibiotic use in COVID-19 patients and indirectly, with deteriorating economic conditions fuelling poverty potentially impacting on levels of resistance, AMR threat remains significant. Main body In this paper, main AMR countermeasures are revisited and priorities to tackle the issue are re-iterated. The need for collaboration is stressed, acknowledging the relationship between human health, animal health and environment (“One Health” approach). Among the stated priorities, the initiative by the European Medicines Regulatory Network to further strengthen the measures in combatting AMR is highlighted. Likewise, it is asserted that other emerging health threats require global collaboration with the One Health approach offering a valuable blueprint for action. Conclusion The authors stress the importance of an integrated preparedness strategy to tackle this public health peril.

scholarly journals Synergism of the Combination of Traditional Antibiotics and Novel Phenolic Compounds against Escherichia coli

Pathogens ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 811
Author(s):  
Md. Akil Hossain ◽  
Hae-Chul Park ◽  
Sung-Won Park ◽  
Seung-Chun Park ◽  
Min-Goo Seo ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Rattus Norvegicus ◽  
Inhibitory Concentration ◽  
Epicatechin Gallate ◽  
Antibiotic Resistant ◽  
E Coli ◽  
Pathogenic Escherichia Coli ◽  
Resistant Strains ◽  
Novel Approaches ◽  
Rapid Emergence

Pathogenic Escherichia coli (E. coli)-associated infections are becoming difficult to treat because of the rapid emergence of antibiotic-resistant strains. Novel approaches are required to prevent the progression of resistance and to extend the lifespan of existing antibiotics. This study was designed to improve the effectiveness of traditional antibiotics against E. coli using a combination of the gallic acid (GA), hamamelitannin, epicatechin gallate, epigallocatechin, and epicatechin. The fractional inhibitory concentration index (FICI) of each of the phenolic compound-antibiotic combinations against E. coli was ascertained. Considering the clinical significance and FICI, two combinations (hamamelitannin-erythromycin and GA-ampicillin) were evaluated for their impact on certain virulence factors of E. coli. Finally, the effects of hamamelitannin and GA on Rattus norvegicus (IEC-6) cell viability were investigated. The FICIs of the antibacterial combinations against E. coli were 0.281–1.008. The GA-ampicillin and hamamelitannin-erythromycin combinations more effectively prohibited the growth, biofilm viability, and swim and swarm motilities of E. coli than individual antibiotics. The concentration of hamamelitannin and GA required to reduce viability by 50% (IC50) in IEC-6 cells was 988.54 μM and 564.55 μM, correspondingly. GA-ampicillin and hamamelitannin-erythromycin may be potent combinations and promising candidates for eradicating pathogenic E. coli in humans and animals.

scholarly journals Antibiotic-resistant Escherichia coli and Salmonella spp. associated with dairy cattle and farm environment having public health significance

2019 ◽  
Vol 12 (7) ◽  
pp. 984-993 ◽  
Author(s):  
Md. Abdus Sobur ◽  
Abdullah Al Momen Sabuj ◽  
Ripon Sarker ◽  
A. M. M. Taufiqur Rahman ◽  
S. M. Lutful Kabir ◽  
...  
Keyword(s):  
Public Health ◽  
Escherichia Coli ◽  
Antibiotic Resistance ◽  
Resistance Genes ◽  
One Health ◽  
Dairy Farm ◽  
Antibiotic Resistance Genes ◽  
Salmonella Spp ◽  
Antibiotic Resistant ◽  
E Coli

Aim: The present study was carried out to determine load of total bacteria, Escherichia coli and Salmonella spp. in dairy farm and its environmental components. In addition, the antibiogram profile of the isolated bacteria having public health impact was also determined along with identification of virulence and resistance genes by polymerase chain reaction (PCR) under a one-health approach. Materials and Methods: A total of 240 samples of six types (cow dung - 15, milk - 10, milkers' hand wash - 10, soil - 10 water - 5, and vegetables - 10) were collected from four dairy farms. For enumeration, the samples were cultured onto plate count agar, eosin methylene blue, and xylose-lysine deoxycholate agar and the isolation and identification of the E. coli and Salmonella spp. were performed based on morphology, cultural, staining, and biochemical properties followed by PCR. The pathogenic strains of E. coli stx1, stx2, and rfbO157 were also identified through PCR. The isolates were subjected to antimicrobial susceptibility test against 12 commonly used antibiotics by disk diffusion method. Detection of antibiotic resistance genes ereA, tetA, tetB, and SHV were performed by PCR. Results: The mean total bacterial count, E. coli and Salmonella spp. count in the samples ranged from 4.54±0.05 to 8.65±0.06, 3.62±0.07 to 7.04±0.48, and 2.52±0.08 to 5.87±0.05 log colony-forming unit/g or ml, respectively. Out of 240 samples, 180 (75%) isolates of E. coli and 136 (56.67%) isolates of Salmonella spp. were recovered through cultural and molecular tests. Among the 180 E. coli isolates, 47 (26.11%) were found positive for the presence of all the three virulent genes, of which stx1 was the most prevalent (13.33%). Only three isolates were identified as enterohemorrhagic E. coli. Antibiotic sensitivity test revealed that both E. coli and Salmonella spp. were found highly resistant to azithromycin, tetracycline, erythromycin, oxytetracycline, and ertapenem and susceptible to gentamycin, ciprofloxacin, and imipenem. Among the four antibiotic resistance genes, the most observable was tetA (80.51-84.74%) in E. coli and Salmonella spp. and SHV genes were the lowest one (22.06-25%). Conclusion: Dairy farm and their environmental components carry antibiotic-resistant pathogenic E. coli and Salmonella spp. that are potential threat for human health which requires a one-health approach to combat the threat.

scholarly journals COVID-19 through the One Health lens: adding a missing perspective

2021 ◽  
Author(s):  
Christian Selbach ◽  
Maarten P. M. Vanhove ◽  
Kim Nørgaard Mouritsen
Keyword(s):  
Public Health ◽  
Policy Making ◽  
One Health ◽  
Evolutionary Ecology ◽  
Integrative Approach ◽  
Health Awareness ◽  
Human Parasite ◽  
Health Concept ◽  
Human Animal ◽  
The One

The One Health concept offers an integrative approach to disease and health at the human-animal-environment interface. It has often been suggested to view the COVID-19 outbreak within this framework to better understand and mitigate this global crisis. Here, we discuss how the evolutionary ecology of host-pathogen systems can add a valuable additional perspective to the debate around SARS-CoV-2 and its implications for public health awareness and policy-making. In this context, it is especially important to highlight that changes in nature, such as zoonotic spillover events, are often irreversible, and that humans, while deeply embedded in ecosystems, are intricate ecosystems themselves. A better recognition of the complex biology and evolution of human-parasite interactions will assist our understanding of such zoonoses.

A Hidden Corner of the “One Health” Concept: One Health, the Military Veterinarian, and Education

2016 ◽  
Vol 15 (2) ◽  
pp. 107-120
Author(s):  
Andrea Győrffy ◽  
Ákos Jozwiak
Keyword(s):  
Public Health ◽  
Veterinary Medicine ◽  
National Security ◽  
One Health ◽  
Armed Forces ◽  
Veterinary Services ◽  
Health Concept ◽  
The One ◽  
The Military ◽  
Over Time

Public health belongs to the “One Health” umbrella. As military veterinary medicine evolved, it became embedded in national security. Many armed forces still have active veterinary services, both regular and reserve components. The military veterinarian can serve as an interface between civilians and civil organizations, can handle complex and interdisciplinary cases. Introducing the “One Health” concept both in practice and education has encountered many difficulties. Over time, “One Health” has been judged to be a “buzz word” in civilian areas; however, it is a weighty concept. Its importance is pronounced in military areas where practicing along One Health principles were present before the appearance of the term itself. Nevertheless, military “One Health” has not penetrated into the overwhelming “One Health” literature. Emphasizing the military aspects of One Health not only reveals an obscure corner but might help to regain the proper importance of the “One Health” concept.

scholarly journals Comparative Evaluation of qnrA, qnrB, and qnrS Genes in Enterobacteriaceae Ciprofloxacin-Resistant Cases, in Swine Units and a Hospital from Western Romania

Antibiotics ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 698 ◽  
Author(s):  
Alexandru O. Doma ◽  
Roxana Popescu ◽  
Mihai Mitulețu ◽  
Delia Muntean ◽  
János Dégi ◽  
...  
Keyword(s):  
Public Health ◽  
Human Subjects ◽  
Pcr Analysis ◽  
Global Public Health ◽  
Bacterial Dna ◽  
E Coli ◽  
Dna Purity ◽  
Resistant Strains ◽  
Polymerase Chain

Excessive use of antimicrobials and inadequate infection control practices has turned antimicrobial resistance (AMR) into a global, public health peril. We studied the expression of qnrA, qnrB, and qnrS plasmid in ciprofloxacin (CIP)-resistant strains of Escherichia coli in swine and humans from Romania, using the Polymerase Chain Reaction (PCR) technique. Antibiotic Susceptibility Testing (AST) for human subjects (H) on 147 samples and 53 swine (S) was ascertained as well as the isolation of bacterial DNA (E. coli) as follows: bacteriolysis, DNA-binding, rinsing, elution, amplification, and nucleic acids’ migration and U.V. visualization stages. From 24 samples of E. coli resistant to CIP collected from H subjects and 15 from S, for PCR analysis, 15 H and 12 S were used, with DNA purity of 1.8. The statistically analyzed results using the Crosstabs function (IBM SPSS Statistics-Ver. 2.1.), revealed the qnrS (417 bp) gene in 13 human subjects (52.0%), as well as in all swine samples studied. The qnrB (526 bp) gene was exposed in 9 of the human patients (36.0%) and in all swine isolates, and the qnrA (516 bp) gene was observed only in 3 of the isolates obtained from human subjects (12.0%) and was not discovered in pigs (p > 0.05). The presence of plasmids qnrA, qnrB, and qnrS in the human samples and of qnrB and qnrS in swine, facilitates the survival of pathogens despite the CIP action. The long-term use of CIP could cause a boost in the prevalence of qnr resistance genes, and resistance in the pigs destined for slaughter, a perturbing fact for public health and the human consumer.

scholarly journals Intestine and Environment of the Chicken as Reservoirs for Extraintestinal Pathogenic Escherichia coli Strains with Zoonotic Potential

2008 ◽  
Vol 75 (1) ◽  
pp. 184-192 ◽  
Author(s):  
Christa Ewers ◽  
Esther-Maria Ant�o ◽  
Ines Diehl ◽  
Hans-C. Philipp ◽  
Lothar H. Wieler
Keyword(s):  
Escherichia Coli ◽  
Virulence Gene ◽  
Infection Model ◽  
E Coli ◽  
Gene Profiles ◽  
Pathogenic Escherichia Coli ◽  
Zoonotic Risk ◽  
Resistant Strains ◽  
Genetic Pool

ABSTRACT Although research has increasingly focused on the pathogenesis of avian pathogenic Escherichia coli (APEC) infections and the “APEC pathotype” itself, little is known about the reservoirs of these bacteria. We therefore compared outbreak strains isolated from diseased chickens (n = 121) with nonoutbreak strains, including fecal E. coli strains from clinically healthy chickens (n = 211) and strains from their environment (n = 35) by determining their virulence gene profiles, phylogenetic backgrounds, responses to chicken serum, and in vivo pathogenicities in a chicken infection model. In general, by examining 46 different virulence-associated genes we were able to distinguish the three groups of avian strains, but some specific fecal and environmental isolates had a virulence gene profile that was indistinguishable from that determined for outbreak strains. In addition, a substantial number of phylogenetic EcoR group B2 strains, which are known to include potent human and animal extraintestinal pathogenic E. coli (ExPEC) strains, were identified among the APEC strains (44.5%) as well as among the fecal E. coli strains from clinically healthy chickens (23.2%). Comparably high percentages (79.2 to 89.3%) of serum-resistant strains were identified for all three groups of strains tested, bringing into question the usefulness of this phenotype as a principal marker for extraintestinal virulence. Intratracheal infection of 5-week-old chickens corroborated the pathogenicity of a number of nonoutbreak strains. Multilocus sequence typing data revealed that most strains that were virulent in chicken infection experiments belonged to sequence types that are almost exclusively associated with extraintestinal diseases not only in birds but also in humans, like septicemia, urinary tract infection, and newborn meningitis, supporting the hypothesis that not the ecohabitat but the phylogeny of E. coli strains determines virulence. These data provide strong evidence for an avian intestinal reservoir hypothesis which could be used to develop intestinal intervention strategies. These strains pose a zoonotic risk because either they could be transferred directly from birds to humans or they could serve as a genetic pool for ExPEC strains.

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