Antimicrobial Resistance Research Articles

Review of doxycycline for prophylaxis of sexually transmitted infections

AbstractThe surging rates of STIs necessitate medical practitioners in the appropriate specialties to focus on rapid recognition, treatment and prevention of these conditions. Through both pre‐ and post‐exposure prophylaxis with doxycycline, dermatologists can provide up‐to‐date treatment in the field of venereology. Herein, we review the results of clinical trials in the available literature that investigate doxycycline prophylaxis in the prevention of bacterial STIs. A search was performed using the PubMED and Scopus databases which yielded six clinical trials for our review. Based on the results of these clinical trials, doxycycline prophylaxis offers significant reductions in bacterial STIs, specifically in men who have sex with men (MSM). Additional research is needed in other high‐risk groups, including females. Moreover, additional research is needed to determine the effects of doxycycline prophylaxis on tetracycline resistance in STI‐causing bacteria. As the utilization of doxycycline prophylaxis for STIs becomes more common, it is important that dermatologists become familiar with the data surrounding this prevention regimen and patient populations who may seek to know more about it. More research is needed to determine benefits in other subpopulations, antimicrobial resistance and cost effectiveness.

Niche-specific metabolic phenotypes can be used to identify antimicrobial targets in pathogens

Bacterial pathogens pose a major risk to human health, leading to tens of millions of deaths annually and significant global economic losses. While bacterial infections are typically treated with antibiotic regimens, there has been a rapid emergence of antimicrobial resistant (AMR) bacterial strains due to antibiotic overuse. Because of this, treatment of infections with traditional antimicrobials has become increasingly difficult, necessitating the development of innovative approaches for deeply understanding pathogen function. To combat issues presented by broad- spectrum antibiotics, the idea of narrow-spectrum antibiotics has been previously proposed and explored. Rather than interrupting universal bacterial cellular processes, narrow-spectrum antibiotics work by targeting specific functions or essential genes in certain species or subgroups of bacteria. Here, we generate a collection of genome-scale metabolic network reconstructions (GENREs) of pathogens through an automated computational pipeline. We used these GENREs to identify subgroups of pathogens that share unique metabolic phenotypes and determined that pathogen physiological niche plays a role in the development of unique metabolic function. For example, we identified several unique metabolic phenotypes specific to stomach pathogens. We identified essential genes unique to stomach pathogens in silico and a corresponding inhibitory compound for a uniquely essential gene. We then validated our in silico predictions with an in vitro microbial growth assay. We demonstrated that the inhibition of a uniquely essential gene, thyX, inhibited growth of stomach-specific pathogens exclusively, indicating possible physiological location-specific targeting. This pioneering computational approach could lead to the identification of unique metabolic signatures to inform future targeted, physiological location-specific, antimicrobial therapies, reducing the need for broad-spectrum antibiotics.

Progress in the Identification and Design of Novel Antimicrobial Peptides Against Pathogenic Microorganisms

Abstract The occurrence and spread of antimicrobial resistance (AMR) pose a looming threat to human health around the world. Novel antibiotics are urgently needed to address the AMR crisis. In recent years, antimicrobial peptides (AMPs) have gained increasing attention as potential alternatives to conventional antibiotics due to their abundant sources, structural diversity, broad-spectrum antimicrobial activity, and ease of production. Given its significance, there has been a tremendous advancement in the research and development of AMPs. Numerous AMPs have been identified from various natural sources (e.g., plant, animal, human, microorganism) based on either well-established isolation or bioinformatic pipelines. Moreover, computer-assisted strategies (e.g., machine learning (ML) and deep learning (DL)) have emerged as a powerful and promising technology for the accurate prediction and design of new AMPs. It may overcome some of the shortcomings of traditional antibiotic discovery and contribute to the rapid development and translation of AMPs. In these cases, this review aims to appraise the latest advances in identifying and designing AMPs and their significant antimicrobial activities against a wide range of bacterial pathogens. The review also highlights the critical challenges in discovering and applying AMPs.

Global trends in antibiotic consumption during 2016–2023 and future projections through 2030

Antibiotic resistance is a global public health threat. Many factors contribute to this issue, with human antibiotic consumption being significant among them. Analyzing trends and patterns in consumption can aid in developing policies to mitigate the burden of antimicrobial resistance and global disparities in access to antibiotics. Using pharmaceutical sales data licensed from IQVIA, we estimate national-level trends in antibiotic consumption in 67 countries during 2016–2023 and analyze the effects of economic growth and the COVID-19 pandemic. Finally, we estimate global human consumption and project growth through 2030 assuming current trends. We find that estimated antibiotic consumption in reported countries increased 16.3% from 29.5 to 34.3 billion defined daily doses (DDDs) from 2016 to 2023, reflecting a 10.6% increase in the consumption rate from 13.7 to 15.2 DDDs per 1,000 inhabitants per day. Increases were most pronounced in upper-middle- and lower-middle-income countries. While the COVID-19 pandemic significantly reduced consumption globally, this was most pronounced in high-income countries, and in these countries, reductions in antibiotic use in 2020 were sharper, and lasted longer, than in other countries. By 2030, we project that, without reductions in rapidly developing nations, such as investments to improve infrastructure, particularly water and sanitation, along with improved access to vaccination, global antibiotic consumption will increase by 52.3% from an estimated 49.3 billion in 2023 to 75.1 billion DDDs.

Pooled prevalence of Escherichia coli phenotypic and genotypic antimicrobial resistance profiles in poultry: systematic review and meta-analysis

Pooled prevalence of Escherichia coli phenotypic and genotypic antimicrobial resistance profiles in poultry: systematic review and meta-analysis

Exploring Physicians' Perspectives on Antibiotic Stewardship Implementation: A Qualitative Investigation in Al-Nasiriyah Hospitals

Background: The overuse and inappropriate use of antibiotics cause antimicrobial resistance (AMR). The antibiotic stewardship program (ASP) plays a crucial role in improving prescribing antibiotics. Although the Iraqi Ministry of Health has issued ASP legislation, its full implementation in clinical practice remains incomplete. Objectives: To explore physicians' perspectives regarding the current and potential implementation of ASP in Al-Nasiriya hospitals. Methods: A qualitative study was conducted in Al-Nasiriyah public hospitals from December 17, 2023, to January 21, 2024, using face-to-face interviews. Physicians who prescribe antibiotics, work in Al-Nasiriyah public hospitals, and consent to participate in the study were recruited using purposeful and snowball sampling, and the size of the sample was specified by saturation. The interviews' audio was transcribed verbatim and analyzed thematically. Results: Nine public hospitals in Al-Nasiriyah were included in the study. One hospital was excluded because the ASP was activated after data collection began. Sixteen physicians in different specialties were recruited, 15 males and one female. Thematic analysis revealed two major themes: challenges in antibiotic prescribing practices (3 subthemes: antibiotic selection, review, and practice, antibiotic mismanagement, and antibiotic resistance) and antibiotic stewardship implementation (4 subthemes: ASP knowledge and components, perceived benefits and importance, implementation challenges and barriers, and ASP enablers). Conclusions: There were many challenges in antibiotic prescribing practice, including antibiotic mismanagement and AMR. The participants acknowledged the importance of the ASP, but they mentioned many barriers to its application.

Metal Hydroxide Composite with g-C3N4 Catalyzed Oxidation of Antibiotics: A Step Towards Sustainable Development Goals for Antimicrobial Resistance

Metal Hydroxide Composite with g-C3N4 Catalyzed Oxidation of Antibiotics: A Step Towards Sustainable Development Goals for Antimicrobial Resistance

Photodynamic inactivation and its effects on the heterogeneity of bacterial resistance.

Antimicrobial resistance is a growing threat to global public health, requiring innovative approaches for its control. Photodynamic inactivation (PDI) with light-activated photosensitizers has emerged as a strategy to combat resistant bacteria, challenging the intrinsic heterogeneity of bacterial populations. This study evaluates the impact of PDI on both heterogeneity and shape of the distribution profile of resistant bacterial populations, specifically on strains of Staphylococcus aureus resistant to amoxicillin, erythromycin, and gentamicin, for exploring its potential as an adjuvant therapy in the fight against bacterial resistance. Curcumin (10 µM) was used as a photosensitizer and five cycles of PDI were applied on Staphylococcus aureus strains under 450nm irradiation of 10J/cm² energy density. The resistance variations amongst bacterial subpopulations were investigated by calculating the minimum inhibitory concentration (MIC) before and after PDI treatment. MIC was significantly reduced by the antibiotics tested post-PDI and a reduction in the heterogeneity of bacterial populations was recorded, suggesting PDI can effectively decrease the resistance diversity of Staphylococcus aureus. The result reinforces the potential of PDI as a valuable adjuvant therapy, offering a promising avenue for mitigating bacterial resistance and promoting more effective treatment strategies against resistant infections.

Clonal and horizontal transmission of carbapenem-resistant Enterobacterales strains and genes via flies.

Antimicrobial resistance (AMR) is one of the most pressing global public health challenges; in particular, the rapid dissemination of carbapenem-resistant Enterobacterales (CRE) is emerging as a significant concern worldwide. Flies, serving as carriers of pathogens, pose a potential threat in the transmission of antibiotic-resistant bacteria (ARB) between animals and humans. The aim of this study was to evaluate and reveal the potential risk of AMR spread by flies. A total of 450 flies were collected from four farms, four rural areas, and four urban areas in Dengfeng, Henan, China. To select CRE strains on the surface of flies, three flies sampled from the same geographical location were arbitrarily selected and placed into one tube of brain heart infusion broth (BHI), and the supernatant was screened using CHROMagar™ mSuperCARBA culture medium. Different colors and shapes of colonies were identified by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry and 16S rRNA sequencing. Antimicrobial susceptibility testing for CRE strains was performed using broth microdilution. All CRE strains were whole-genome sequenced. Short-read sequencing was performed using MGISEQ-2000 and long-read sequencing was conducted using GridION. Totally, 150 BHI tubes were screened for CRE strains, and 33 strains were identified as CRE positive. In 24 mSuperCARBA plates, only one species of CRE strain was isolated from each plate. In three plates, two different species of CRE strains were identified in each plate. In one plate, three different species of CRE strains were simultaneously isolated. Carbapenem resistance genes were detected in 81.8% of CRE strains, and blaNDM-1 was predominant (66.7%). No significant correlations between carbapenem-resistant phenotypes and carbapenem resistance genes were observed. The complete genomes of all 33 strains were obtained. Genome analysis revealed that clonal transmission events may have occurred among different farms and rural areas. Phylogenetic analysis revealed that blaNDM-1 IncFII plasmids could break bacterial species barrier for cross-host transmission in diverse areas. To understand and control the transmission of AMR from the perspective of One Health, it is imperative to enhance surveillance of ARB, antibiotic resistance genes, and antibiotic-resistant plasmids in flies.

The Hidden Threat of Antimicrobial Resistance: A Case Study from A Private Hospital in Jordan

Antibiotic resistance is considered a widespread problem with global health implications, leading to increased patient morbidity and impacting the selection of effective antibiotics, consequently influencing patient recovery. This study aimed to assess antibiogram resistance patterns of bacterial records at the Islamic Hospital in Jordan using a retrospective study during the period 2020-2022. A total of 9369 samples obtained from different patients were cultured. Data were processed and analyzed with SPSS v.23.0. The results showed that 2841 (30.3%) samples were positive for bacterial infections. Microbial profiles of positive samples indicated the highest proportion for Escherichia coli, 39%, followed by Klebsiella pneumoniae 12% were the most frequent Gram-negative bacterial isolates, whereas Staphylococcus aureus 13% and Streptococcus pneumoniae 4% were the most common Gram-positive bacterial isolates. Interestingly, multidrug-resistant bacteria comprised 61.7% of the isolates. The percentage of multi-drug resistance in isolates of Staphylococcus aureus, Escherichia coli, and Klebsiella pneumoniae was 68.7%, 73.1%, and 72%, respectively. Escherichia coli was most resistant to ampicillin (89%) and most sensitive to imipenem (100%). Klebsiella pneumoniae showed a 100% sensitivity to meropenem but 49% resistance to ceftriaxone. Pseudomonas aeruginosa was the most sensitive to amikacin and colistin (86% and 100%, respectively). Staphylococcus aureus isolates have resistance rates of 78% for ciprofloxacin, 35.6% for clindamycin and an overall resistance rate of 68.7%. These findings indicate multiple resistance for isolated bacteria. Therefore, antimicrobial resistance should be monitored continuously, and patients should be treated based on anti-microbial susceptibility tests.

Phage-Derived Endolysins Against Resistant Staphylococcus spp.: A Review of Features, Antibacterial Activities, and Recent Applications.

Antimicrobial resistance is a significant global public health issue, and the dissemination of antibiotic resistance in Gram-positive bacterial pathogens has significantly increased morbidity, mortality rates, and healthcare costs. Among them, Staphylococcus, especially methicillin-resistant Staphylococcus aureus (MRSA), causes a wide range of diseases due to its diverse pathogenic factors and infection strategies. These bacteria also present significant issues in veterinary medicine and food safety. Effectively managing staphylococci-related problems necessitates a concerted effort to implement preventive measures, rapidly detect the pathogen, and develop new and safe antimicrobial therapies. In recent years, there has been growing interest in using endolysins to combat bacterial infections. These enzymes, which are also referred to as lysins, are a unique class of hydrolytic enzymes synthesized by double-stranded DNA bacteriophages. They possess glycosidase, lytic transglycosylase, amidase, and endopeptidase activities, effectively destroying the peptidoglycan layer and resulting in bacterial lysis. This unique property makes endolysins powerful antimicrobial agents, particularly against Gram-positive organisms with more accessible peptidoglycan layers. Therefore, considering the potential benefits of endolysins compared to conventional antibiotics, we have endeavored to gather and review the characteristics and uses of endolysins derived from staphylococcal bacteriophages, as well as their antibacterial effectiveness against Staphylococcus spp. based on conducted experiments and trials.

Antibiogram, Phenotypic and Genotypic Detection of Extended-Spectrum β-lactamase Producing and Fluoroquinolone Resistant Escherichia coli Isolated from Pigs

Antimicrobial resistance in food animals is a global issue. Particularly, the dissemination of Extended Spectrum Beta-Lactamase and fluoroquinolone resistant Escherichia coli in food-producing animals posed a public health threat to the efficacy of various antibiotics. Therefore, this study aimed to detect the presence of multidrug-resistant Escherichia coli from fecal samples of pigs in Puducherry. In total, 16 faecal samples from apparently healthy pigs of different age groups were chosen for this study and subjected to detection of ESBL production and FQ resistance. E. coli was isolated from all the faecal samples (100%) and confirmed by biochemical tests and Polymerase Chain Reaction. All the E. coli isolates were found to be positive for ESBL production and fluoroquinolone resistance by phenotypic method. Out of 16 E. coli isolates, 11 (68.75%) isolates were positive for the presence of ESBL-producing genes, in which, 2 harbored bla TEM and 9 harboured bla SHV genes. In total 13/16 (81.2%) E. coli isolates harbored PMQR genes, in which 11 isolates harbored the qnrS gene and 11 isolates harbored the qnrB gene. The results showed that 9 isolates harbored both qnrS and qnrB genes in combination. Antimicrobial susceptibility test showed that the majority of the isolates exhibited a high level of resistance against Amoxycillin/clavulanic acid (100%), Cefpodoxime (100%), Cefotaxime (80%), Aztreonam (70%), Ceftazidime (70%), Enrofloxacin (70%) and Ceftriaxone (40%). The present study showed the presence of ESBL-producing and FQ-resistant E. coli in swine in the Puducherry region and their antibiogram pattern.

Advisory Committee on the Microbiological Safety of Food recommendations for standardisation of antimicrobial resistance terminology.

Advisory Committee on the Microbiological Safety of Food recommendations for standardisation of antimicrobial resistance terminology.

In Silico Study of the Potential Inhibitory Effects on Escherichia coli DNA Gyrase of Some Hypothetical Fluoroquinolone–Tetracycline Hybrids

Background/Objectives: Despite the discovery of antibiotics, bacterial infections persist globally, exacerbated by rising antimicrobial resistance that results in millions of cases, increased healthcare costs, and more extended hospital stays. The urgent need for new antibacterial drugs continues as resistance evolves. Fluoroquinolones and tetracyclines are versatile antibiotics that are effective against various bacterial infections. A hybrid antibiotic combines two or more molecules to enhance antimicrobial effectiveness and combat resistance better than monotherapy. Fluoroquinolones are ideal candidates for hybridization due to their potent bactericidal effects, ease of synthesis, and ability to form combinations with other molecules. Methods: This study explored the mechanisms of action for 40 hypothetical fluoroquinolone–tetracycline hybrids, all of which could be obtained using a simple, eco-friendly synthesis method. Their interaction with Escherichia coli DNA Gyrase and similarity to albicidin were evaluated using the FORECASTER platform. Results: Hybrids such as Do-Ba, Mi-Fi, and Te-Ba closely resembled albicidin in physicochemical properties and FITTED Scores, while Te-De surpassed it with a better score. Similar to fluoroquinolones, these hybrids likely inhibit DNA synthesis by binding to enzyme–DNA complexes. Conclusions: These hybrids could offer broad-spectrum activity and help mitigate bacterial resistance, though further in vitro and in vivo studies are needed to validate their potential.

FAGOTERAPIA COMO ALTERNATIVA NO COMBATE A INFECÇÕES RESISTENTES: AVANÇOS E DESAFIOS NO TRATAMENTO DE E. COLI UPEC E EPEC

Resistant bacterial infections represent one of the biggest public health challenges today, resulting in a significant increase in morbidity and mortality linked to infectious diseases. On the other hand, Escherichia coli stands out as one of the most significant bacteria, particularly the uropathogenic (UPEC) and enteropathogenic (EPEC) variants. Infections caused by these strains have become a problem due to their ability to develop resistance to various antibiotics, thus harming therapeutic alternatives. The objective of this research was to investigate the effectiveness of phage therapy as an alternative in combating resistant bacterial infections, focusing on UPEC and enteropathogenic EPEC strains of Escherichia coli. Methodologically, it was an exploratory and comparative bibliographic review through qualitative research. As a result, it was found that future directions in phage therapy present a promising outlook, full of technological innovations, research needs and ethical considerations. The success of phage therapy as a viable alternative to treating resistant bacterial infections will depend on collaboration between different disciplines, careful consideration of ethical implications, and a commitment to ensuring that new technologies benefit society as a whole. The development of robust guidelines and regulations, along with increased public awareness, will be critical to the effective integration of phage therapy into clinical practice and public health. It was concluded that progress in this area represents a response to the bacterial resistance crisis, as it opens up new perspectives for biomedical research and clinical practice. Therefore, the continued engagement of researchers, health professionals and policy makers will be essential to ensure that phage therapy is established as an integral component in the fight against bacterial infections, benefiting public health in a broad and effective way.

Artificial intelligence-enhanced biosurveillance for antimicrobial resistance in sub-Saharan Africa.

Antimicrobial resistance (AMR) remains a critical global health threat, with significant impacts on individuals and healthcare systems, particularly in low-income countries. By 2019, AMR was responsible for >4.9 million fatalities globally, and projections suggest this could rise to 10 million annually by 2050 without effective interventions. Sub-Saharan Africa (SSA) faces considerable challenges in managing AMR due to insufficient surveillance systems, resulting in fragmented data. Technological advancements, notably artificial intelligence (AI), offer promising avenues to enhance AMR biosurveillance. AI can improve the detection, tracking and prediction of resistant strains through advanced machine learning and deep learning algorithms, which analyze large datasets to identify resistance patterns and develop predictive models. AI's role in genomic analysis can pinpoint genetic markers and AMR determinants, aiding in precise treatment strategies. Despite the potential, SSA's implementation of AI in AMR surveillance is hindered by data scarcity, infrastructural limitations and ethical concerns. This review explores what is known about the integration and applicability of AI-enhanced biosurveillance methodologies in SSA, emphasizing the need for comprehensive data collection, interdisciplinary collaboration and the establishment of ethical frameworks. By leveraging AI, SSA can significantly enhance its AMR surveillance capabilities, ultimately improving public health outcomes.

Antimicrobial Resistance in Lactococcus spp. Isolated from Native Brazilian Fish Species: A Growing Challenge for Aquaculture

Lactococcus spp. has emerged as a pathogen that is affecting global aquaculture, with L. garvieae, L. petauri, and L. formosensis causing piscine lactococcosis. While antimicrobials are commonly used to treat diseases in aquaculture, reports of antimicrobial resistance in fish isolates are increasing. However, little is known about the susceptibility patterns of Lactococcus spp. strains isolated from native fish species in Brazil. This study aimed to assess the antimicrobial susceptibility of these strains and establish a provisional epidemiological cutoff value for L. garvieae using the normalized resistance interpretation approach. A total of 47 isolates were tested: 17 L. garvieae, 24 L. petauri, and 6 L. formosensis. The isolates were classified as wild-type (WT) or non-wild-type (NWT) based on inhibition zone diameters. Isolates classified as NWT for three or more antimicrobial classes were considered multidrug-resistant, and the multiple antibiotic resistance (MAR) index was calculated. The results revealed heterogeneity in antimicrobial resistance profiles, with higher resistance to trimethoprim/sulfamethoxazole and norfloxacin. Resistance to other antimicrobials, including florfenicol and oxytetracycline (approved for use in Brazil), varied according to the bacterial species. Lactococcus petauri (87.5%) and L. formosensis (66.7%) showed the highest multidrug resistance, compared to L. garvieae (11.7%), along with higher MAR index values. These findings suggest that multidrug-resistant strains could pose future challenges in the production of native species, underscoring the need for ongoing monitoring of antimicrobial resistance and responsible use of antimicrobials in aquaculture.

Progress of Implementation of World Health Organization Global Antimicrobial Resistance Surveillance System Recommendations on Priority Pathogen-Antibiotic Sensitivity Testing in Africa: Protocol for a Scoping Review.

Antimicrobial resistance (AMR) is a major global public health concern, particularly in low- and middle-income countries where resources and infrastructure for an adequate response are limited. The World Health Organization (WHO) Global Antimicrobial Resistance Surveillance System (GLASS) was introduced in 2016 to address these challenges, outlining recommendations for priority pathogen-antibiotic combinations. Despite this initiative, implementation in Africa remains understudied. This scoping review aims to assess the current state of implementing WHO GLASS recommendations on antimicrobial sensitivity testing (AST) in Africa. The primary objective of this study is to determine the current state of implementing the WHO GLASS recommendations on AST for priority pathogen-antimicrobial combinations. The review will further document if the reporting of AST results is according to "susceptible," "intermediate," and "resistant" recommendations according to GLASS. Following the methodological framework by Arksey and O'Malley, studies published between January 2016 and November 2023 will be included. Search strategies will target electronic databases, including MEDLINE, Scopus, CINAHL, and Embase. Eligible studies will document isolates tested for antimicrobial sensitivity, focusing on WHO-priority specimens and pathogens. Data extraction will focus on key study characteristics, study context, population, and adherence to WHO GLASS recommendations on AST. Descriptive statistics involving summarizing the quantitative data extracted through measures of central tendency and variation will be used. Covidence and Microsoft Excel software will be used. This study will systematically identify, collate, and analyze relevant studies and data sources based on clear inclusion criteria to provide a clear picture of the progress achieved in the implementation of the WHO GLASS recommendations. Areas for further improvement will be documented to inform future efforts to strengthen GLASS implementation for enhanced AMR surveillance in Africa. The study results are expected in August 2024. To our knowledge, this scoping review will be the first to comprehensively examine the implementation of WHO GLASS recommendations in Africa, shedding light on the challenges and successes of AMR surveillance in the region. Addressing these issues aims to contribute to global efforts to combat AMR. PRR1-10.2196/58140.

Enriching the future of public health microbiology with hybridization bait capture.

SUMMARYPublic health microbiology focuses on microorganisms and infectious agents that impact human health. For years, this field has relied on culture or molecular methods to investigate complex samples of public health importance. However, with the increase in accuracy and decrease in sequencing cost over the last decade, there has been a transition to the use of next-generation sequencing in public health microbiology. Nevertheless, many available sequencing methods (e.g., shotgun metagenomics and amplicon sequencing) do not work well in complex sample types, require deep sequencing, or have inherent biases associated with them. Hybridization bait capture, also known as target enrichment, brings in solutions for such limitations. It is an increasingly popular technique to simultaneously characterize many thousands of genetic elements while reducing the amount of sequencing needed (thereby reducing the sequencing costs). Here, we summarize the concept of hybridization bait capture for public health, reviewing a total of 35 bait sets designed in six key topic areas for public health microbiology [i.e., antimicrobial resistance (AMR), bacteria, fungi, parasites, vectors, and viruses], and compare hybridization bait capture to previously relied upon methods. Furthermore, we provide an in-depth comparison of the three most popular bait sets designed for AMR by evaluating each of them against three major AMR databases: Comprehensive Antibiotic Resistance Database, Microbial Ecology Group Antimicrobial Resistance Database, and Pathogenicity Island Database. Thus, this article provides a review of hybridization bait capture for public health microbiologists.

Antimicrobial Resistance and Zoonotic Potential of Nontyphoidal Salmonella From Household Dogs.

Companion animals, like household dogs, are an overlooked transmission point for zoonotic pathogens such as nontyphoidal Salmonella (NTS). Given the proximity of dogs to humans and the use of critically important antibiotics in companion animal medicine, household dogs represent a risk for the spread of antimicrobial-resistant (AMR) Salmonella. To this end, we aimed to leverage existing biosurveillance infrastructure to investigate AMR and the zoonotic potential of NTS isolated from dogs and humans. We identified all NTS strains isolated from domestic dogs via the Veterinary Laboratory Investigation and Response Network between May 2017 and March 2023 (N = 87), and spatiotemporally matched strains isolated from humans in the NCBI Pathogen Isolate Browser (N = 77). These 164 strains, collected from 17 states in the United States, formed the basis of our analysis. Strains isolated from dogs comprised diverse serovars, with most being clinically relevant to human health. All strains possessed AMR determinants for drug classes deemed critically or highly important by the World Health Organization. We identified sixteen NTS isolates from humans closely related to ≥1 of six dog-associated strains. Collectively, our data emphasize the importance of antimicrobial stewardship and sustained biosurveillance beyond human- and agriculture-associated veterinary medicine, using a One-Health framework that accounts for all transmission points including companion animals.