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1.
Curr Microbiol ; 81(1): 20, 2023 Nov 26.
Artigo em Inglês | MEDLINE | ID: mdl-38008776

RESUMO

Stenotrophomonas maltophilia is an opportunistic human pathogen associated with nosocomial and community-acquired infections. We have conducted a microbiological and genomic surveillance study of broad-spectrum cephalosporin- and carbapenem-resistant Gram-negative bacteria colonizing wild birds inhabiting the Brazilian Amazonia. Strikingly, two S. maltophilia strains (SM79 and SM115) were identified in Plain-throated antwren (Isleria hauxwelli) passerines affected by Amazonian fragmentation and degradation. Noteworthy, SM79 and SM115 strains belonged to new sequence types (STs) ST474 and ST473, respectively, displaying resistance to broad-spectrum ß-lactams, aminoglycosides and/or fluoroquinolones. In this regard, resistome analysis confirmed efflux pumps (smeABC, smeDEF, emrAB-tolC and macB), blaL1 and blaL2, aph(3')-IIc and aac(6')-Iak, and Smqnr resistance genes. Comparative phylogenomic analysis with publicly available S. maltophilia genomes clustered ST473 and ST474 with human strains, whereas the ST474 was also grouped with S. maltophilia strains isolated from water and poultry samples. In summary, we report two novel sequence types of S. maltophilia colonizing wild Amazonian birds. The presence of opportunistic multidrug-resistant pathogens in wild birds, from remotes areas, could represent an ecological problem since these animals could easily promote long-distance dispersal of medically important antimicrobial-resistant bacteria. Therefore, while our results could provide a baseline for future epidemiological genomic studies, considering the limited information regarding S. maltophilia circulating among wild animals, additional studies are necessary to evaluate the clinical impact and degree of pathogenicity of this human opportunistic pathogen in wild birds.


Assuntos
Infecções por Bactérias Gram-Negativas , Stenotrophomonas maltophilia , Humanos , Animais , Stenotrophomonas maltophilia/genética , Brasil , Animais Selvagens , Testes de Sensibilidade Microbiana , Antibacterianos/farmacologia , Infecções por Bactérias Gram-Negativas/veterinária , Infecções por Bactérias Gram-Negativas/microbiologia
2.
Genomics ; 114(1): 378-383, 2022 01.
Artigo em Inglês | MEDLINE | ID: mdl-34923088

RESUMO

Convergence of resistance and virulence in Klebsiella pneumoniae is a critical public health issue worldwide. A multidrug-resistant CTX-M-15-producing K. pneumoniae (TIES-4900 strain) was isolated from a highly impacted urban river, in Brazil. The genome was sequenced by MiSeq Illumina platform and de novo assembled using Unicycler. In silico prediction was accomplished by bioinformatics tools. The size of the genome is 5.4 Mb with 5145 protein-coding genes. TIES-4900 strain belonged to the sequence type ST15, yersiniabactin sequence type YbST10, ICEKp4, KL24 (wzi-24) and O1v1 locus. Phylogenomics confirmed genomic relatedness with ST15 clones from human and animal hosts. Convergence of broad resistome (antibiotics, heavy-metals and biocides) and virulome, including the Kpi pilus system involved in host-pathogen interaction and persistence of ST15 clone to hospital environments, were predicted. Virulent behavior was confirmed in the Galleria mellonella infection model. This study may give genomic insights on the spread of critical-priority WHO pathogens beyond hospital settings.


Assuntos
Infecções por Klebsiella , Klebsiella pneumoniae , Animais , Antibacterianos/farmacologia , Brasil , Células Clonais , Farmacorresistência Bacteriana Múltipla/genética , Genômica , Rios , beta-Lactamases/genética
3.
Microb Pathog ; 150: 104644, 2021 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-33259886

RESUMO

The emergence of invasive Haemophilus influenzae infections in vaccinated patient is a public health concern. We have investigated the genomic basis of invasiveness and possible vaccine failure in H. influenzae causing invasive disease in vaccinated and unvaccinated children in Brazil. Three H. influenzae strains isolated from blood cultures of pediatric patients were sequenced. Serotype, MLST, resistome and virulome were predicted using bioinformatic tools, whereas single nucleotide polymorphisms (SNPs) analysis of cap loci and the presence of the putative virulence-enhancing IS1016-bexA partial deletion were predicted in silico. Infections were caused by H. influenzae type a (Hia), type b (Hib) and nontypeable (NTHi), belonging to international high-risk clones of sequence types ST23, ST6 and ST368, respectively, which have been identified in North American, European and Asian countries. Convergence of ampicillin resistance and virulence in Hib-ST6 was supported by blaTEM-1B and deletion in the bexA gene, whereas presence of SNPs in the cap-b locus was associated with antigenic modifications of the capsule structure. Hia-ST23 and NTHi-ST368 strains carried galU, lpsA, opsX, rfaF, iga1, lgtC and lic1/lic2 virulence genes, associated with colonization, adaptation and damage to the lung, or invasiveness. In summary, deletion in the bexA gene and presence of SNPs in the cap locus of Hib could be contributing to invasive disease and possible vaccine failure in pediatric patients, whereas serotype replacement of Hib with type "a" and NTHi strains denotes the ability of non-vaccine serotypes to re-colonize vaccinated patients. Finally, the dissemination of international high-risk clones of H. influenzae emphasizes the importance of monitoring changes in the molecular epidemiology of invasive H. influenzae disease.


Assuntos
Infecções por Haemophilus , Vacinas Anti-Haemophilus , Ásia , Brasil , Criança , Células Clonais , Genômica , Infecções por Haemophilus/epidemiologia , Infecções por Haemophilus/prevenção & controle , Haemophilus influenzae/genética , Humanos , Lactente , Tipagem de Sequências Multilocus , Sorotipagem
4.
Mol Ecol ; 29(10): 1919-1935, 2020 05.
Artigo em Inglês | MEDLINE | ID: mdl-32335957

RESUMO

Critical priority pathogens have globally disseminated beyond clinical settings, thereby threatening wildlife. Andean Condors (Vultur gryphus) are essential for ecosystem health and functioning, but their populations are globally near threatened and declining due to anthropogenic activities. During a microbiological and genomic surveillance study of critical priority antibiotic-resistant pathogens, we identified pandemic lineages of multidrug-resistant extended-spectrum ß-lactamase (ESBL)-producing Escherichia coli colonizing Andean Condors admitted at two wildlife rehabilitation centres in South America. Genomic analysis revealed the presence of genes encoding resistance to hospital and healthcare agents among international E. coli clones belonging to sequence types (STs) ST162, ST602, ST1196 and ST1485. In this regard, the resistome included genes conferring resistance to clinically important cephalosporins (i.e., CTX-M-14, CTX-M-55 and CTX-M-65 ESBL genes), heavy metals (arsenic, mercury, lead, cadmium, copper, silver), pesticides (glyphosate) and domestic/hospital disinfectants, suggesting a link with anthropogenic environmental pollution. On the other hand, the presence of virulence factors, including the astA gene associated with outbreak of childhood diarrhoea and extra-intestinal disease in animals, was identified, whereas virulent behaviour was confirmed using the Galleria mellonella infection model. E. coli ST162, ST602, ST1196 and ST1485 have been previously identified in humans and food-producing animals worldwide, indicating that a wide resistome could contribute to rapid adaptation and dissemination of these clones at the human-animal-environment interface. Therefore, these results highlight that Andean Condors have been colonized by critical priority pathogens, becoming potential environmental reservoirs and/or vectors for dissemination of virulent and antimicrobial-resistant bacteria and/or their genes, in associated ecosystems and wildlife.


Assuntos
Farmacorresistência Bacteriana Múltipla , Infecções por Escherichia coli , Escherichia coli , Animais , Antibacterianos/farmacologia , Ecossistema , Escherichia coli/genética , Infecções por Escherichia coli/veterinária , Genômica , América do Sul , beta-Lactamases/genética
9.
Mar Pollut Bull ; 198: 115844, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38056291

RESUMO

Mangrove ecosystems are hotspots of biodiversity, but have been threatened by anthropogenic activities. Vancomycin-resistant enterococci (VRE) are nosocomial bacteria classified as high priority by the World Health Organization (WHO). Herein, we describe the identification and genomic characteristics of a vancomycin-resistant Enterococcus faecalis strain isolated from a highly impacted mangrove ecosystem of the northeastern Brazilian, in 2021. Genomic analysis confirmed the existence of the transposon Tn1546-vanA and clinically relevant antimicrobial resistance genes, such as streptogramins, tetracycline, phenicols, and fluoroquinolones. Virulome analysis identified several genes associated to adherence, immune modulation, biofilm, and exoenzymes production. The UFSEfl strain was assigned to sequence type (ST9), whereas phylogenomic analysis with publicly available genomes from a worldwide confirmed clonal relatedness with a hospital-associated Brazilian clone. Our findings highlight the successful expansion of hospital-associated VRE in a mangrove area and shed light on the need for strengthening genomic surveillance of WHO priority pathogens in these vital ecosystems.


Assuntos
Ecossistema , Enterococcus faecium , Infecções por Bactérias Gram-Positivas , Enterococos Resistentes à Vancomicina , Humanos , Antibacterianos/farmacologia , Proteínas de Bactérias/genética , Brasil/epidemiologia , Células Clonais , Enterococcus faecalis/genética , Infecções por Bactérias Gram-Positivas/tratamento farmacológico , Infecções por Bactérias Gram-Positivas/epidemiologia , Infecções por Bactérias Gram-Positivas/microbiologia , Testes de Sensibilidade Microbiana , Vancomicina , Resistência a Vancomicina/genética , Enterococos Resistentes à Vancomicina/genética , Infecção Hospitalar/microbiologia
10.
J Glob Antimicrob Resist ; 36: 389-392, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38266960

RESUMO

BACKGROUND: Carbapenemase-producing Citrobacter freundii has been reported as a leading cause of healthcare-associated infections. Particularly, C. freundii belonging to the sequence type (ST) 18 is considered to be an emerging nosocomial clone. OBJECTIVES: To report the genomic background and phylogenomic analysis of a multidrug-resistant NDM-1-producing C. freundii ST18 (strain CF135931) isolated from an endangered green sea turtle affected by plastic pollution in Brazil. METHODS: Genomic DNA was extracted and sequenced using the Illumina NextSeq platform. De novo assembly was performed by CLC Workbench, and in silico analysis accomplished by bioinformatics tools. For phylogenomic analysis, publicly available C. freundii (txid:546) genome assemblies were retrieved from the NCBI database. RESULTS: The genome size was calculated at 5 290 351 bp, comprising 5263 total genes, 4 rRNAs, 77 tRNAs, 11ncRNAs, and 176 pseudogenes. The strain belonged to C. freundii ST18, whereas resistome analysis predicted genes encoding resistance to ß-lactams (blaNDM-1, blaOXA-1, blaCMY-117, and blaTEM-1C), aminoglycosides (aph(3'')-Ib, aadA16, aph(3')-VI, aac(6')-Ib-cr, and aph(6)-Id), quinolones (aac(6')-Ib-cr), macrolides (mph(A) and erm(B)), sulphonamides (sul1 and sul2), tetracyclines (tetA and tetD), and trimethoprim (dfrA27). The phylogenomic analysis revealed that CF135931 strain is closely related to international human-associated ST18 clones producing NDM-1. CONCLUSION: Genomic surveillance efforts are necessary for robust monitoring of the emergence of drug-resistant strains and WHO critical priority pathogens within a One Health framework. In this regard, this draft genome and associated data can improve understanding of dissemination dynamics of nosocomial clones of carbapenemase-producing C. freundii beyond hospital walls. In fact, the emergence of NDM-1-producing C. freundii of global ST18 in wildlife deserves considerable attention.


Assuntos
Infecção Hospitalar , Tartarugas , Animais , Humanos , Citrobacter freundii/genética , Antibacterianos/farmacologia , Genômica , Proteínas Repressoras
11.
Sci Total Environ ; 874: 162564, 2023 May 20.
Artigo em Inglês | MEDLINE | ID: mdl-36870482

RESUMO

Extended spectrum ß-lactamase (ESBL)-producing Enterobacterales has spread rapidly around the world, reaching remote areas. In this regard, wild birds that acquire ESBL producers from anthropogenically impacted areas can become reservoirs, contributing to further dissemination of antimicrobial-resistant bacteria categorized as critical priority pathogens to remote environments, during migration seasons. We have conducted a microbiological and genomic investigation on the occurrence and features of ESBL-producing Enterobacterales in wild birds from the remote Acuy Island, in the Gulf of Corcovado, at Chilean Patagonia. Strikingly, five ESBL-producing Escherichia coli were isolated from migratory and resident gulls. Whole-genome sequencing (WGS) analysis revealed the presence of two E. coli clones belonging to international sequence types (STs) ST295 and ST388, producing CTX-M-55 and CTX-M-1 ESBLs, respectively. Moreover, E. coli carried a wide resistome and virulome associated with human and animal infections. Phylogenomic analysis of global and publicly genomes of E. coli ST388 (n = 51) and ST295 (n = 85) clustered gulls isolates along to E. coli strains isolated from the environment, companion animal and livestock in the United States of America, within or close to the migratory route of Franklin's gull, suggesting a possible trans hemispheric movement of international clones of WHO critical priority ESBL producing pathogens.


Assuntos
Charadriiformes , Infecções por Escherichia coli , Proteínas de Escherichia coli , Animais , Humanos , Animais Selvagens , Antibacterianos , beta-Lactamases/genética , Charadriiformes/microbiologia , Escherichia coli/genética , Infecções por Escherichia coli/epidemiologia , Proteínas de Escherichia coli/genética , Genômica
12.
Microbiol Spectr ; : e0037423, 2023 Sep 06.
Artigo em Inglês | MEDLINE | ID: mdl-37671877

RESUMO

Two novel variants of Klebsiella pneumoniae carbapenemase (KPC) associated with resistance to ceftazidime-avibactam (CZA) and designated as KPC-113 and KPC-114 by NCBI were identified in 2020, in clinical isolates of Klebsiella pneumoniae in Brazil. While K. pneumoniae of ST16 harbored the blaKPC-113 variant on an IncFII-IncFIB plasmid, K. pneumoniae of ST11 carried the blaKPC-114 variant on an IncN plasmid. Both isolates displayed resistance to broad-spectrum cephalosporins, ß-lactam inhibitors, and ertapenem and doripenem, whereas K. pneumoniae producing KPC-114 showed susceptibility to imipenem and meropenem. Whole-genome sequencing and in silico analysis revealed that KPC-113 presented a Gly insertion between Ambler positions 264 and 265 (R264_A265insG), whereas KPC-114 displayed two amino acid insertions (Ser-Ser) between Ambler positions 181 and 182 (S181_P182insSS) in KPC-2, responsible for CZA resistance profiles. Our results confirm the emergence of novel KPC variants associated with resistance to CZA in international clones of K. pneumoniae circulating in South America. IMPORTANCE KPC-2 carbapenemases are endemic in Latin America. In this regard, in 2018, ceftazidime-avibactam (CZA) was authorized for clinical use in Brazil due to its significant activity against KPC-2 producers. In recent years, reports of resistance to CZA have increased in this country, limiting its clinical application. In this study, we report the emergence of two novel KPC-2 variants, named KPC-113 and KPC-114, associated with CZA resistance in Klebsiella pneumoniae strains belonging to high-risk clones ST11 and ST16. Our finding suggests that novel mutations in KPC-2 are increasing in South America, which is a critical issue deserving active surveillance.

13.
One Health ; 17: 100594, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-37448770

RESUMO

The spread of carbapenemase-producing Klebsiella pneumoniae beyond hospital settings is a global critical issue within a public health and One Health perspective. Another worrisome concern is the convergence of virulence and resistance in healthcare-associated lineages of K. pneumoniae leading to unfavorable clinical outcomes. During a surveillance study of WHO critical priority pathogens circulating in an impacted urban river in São Paulo, Brazil, we isolate two hypermucoviscous and multidrug-resistant K. pneumoniae strains (PINH-4250 and PINH-4900) from two different locations near to medical centers. Genomic investigation revealed that both strains belonged to the global high-risk sequence type (ST) ST11, carrying the blaKPC-2 carbapenemase gene, besides other medically important antimicrobial resistance determinants. A broad virulome was predicted and associated with hypervirulent behavior in the Galleria mellonella infection model. Comparative phylogenomic analysis of PINH-4250 and PINH-4900 along to an international collection of publicly available genomes of K. pneumoniae ST11 revealed that both environmental strains were closely related to hospital-associated K. pneumoniae strains recovered from clinical samples between 2006 and 2018, in São Paulo city. Our findings support that healthcare-associated KPC-2-positive K. pneumoniae of ST11 clone has successfully expanded beyond hospital settings. In summary, aquatic environments can become potential sources of international clones of K. pneumoniae displaying carbapenem resistance and hypervirulent behaviors, which is a critical issue within a One Health perspective.

14.
One Health ; 17: 100586, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-37415721

RESUMO

Wild birds have emerged as novel reservoirs and potential spreaders of antibiotic-resistant priority pathogens, being proposed as sentinels of anthropogenic activities related to the use of antimicrobial compounds. The aim of this study was to investigate the occurrence and genomic features of extended-spectrum ß-lactamase (ESBL)-producing bacteria in wild birds in South America. In this regard, we have identified two ESBL (CTX-M-55 and CTX-M-65)-positive Escherichia coli (UNB7 and GP188 strains) colonizing Creamy-bellied Thrush (Turdus amaurochalinus) and Variable Hawk (Geranoaetus polyosoma) inhabiting synanthropic and wildlife environments from Brazil and Chile, respectively. Whole-genome sequence (WGS) analysis revealed that E. coli UNB7 and GP188 belonged to the globally disseminated clone ST602, carrying a wide resistome against antibiotics (ß-lactams), heavy metals (arsenic, copper, mercury), disinfectants (quaternary ammonium compounds), and pesticides (glyphosate). Additionally, E. coli UNB7 and GP188 strains harbored virulence genes encoding hemolysin E, type II and III secretion systems, increased serum survival, adhesins and siderophores. SNP-based phylogenomic analysis, using an international genome database, revealed genomic relatedness (19-363 SNP differences) of GP188 with livestock and poultry strains, and genomic relatedness (61-318 differences) of UNB7 with environmental, human and livestock strains (Table S1), whereas phylogeographical analysis confirmed successful expansion of ST602 as a global clone of One Health concern. In summary, our results support that ESBL-producing E. coli ST602 harboring a wide resistome and virulome have begun colonizing wild birds in South America, highlighting a potential new reservoir of critical priority pathogens.

15.
One Health ; 16: 100476, 2023 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-36691392

RESUMO

WHO priority pathogens have disseminated beyond hospital settings and are now being detected in urban and wild animals worldwide. In this regard, synanthropic animals such as urban pigeons (Columba livia) and rodents (Rattus rattus, Rattus norvegicus and Mus musculus) are of interest to public health due to their role as reservoirs of pathogens that can cause severe diseases. These animals usually live in highly contaminated environments and have frequent interactions with humans, domestic animals, and food chain, becoming sentinels of anthropogenic activities. In this study, we report genomic data of Escherichia coli strains selected for ceftriaxone and ciprofloxacin resistance, isolated from pigeons and black rats. Genomic analysis revealed the occurrence of international clones belonging to ST10, ST155, ST224 and ST457, carrying a broad resistome to beta-lactams, aminoglycosides, trimethoprim/sulfamethoxazole, fluoroquinolones, tetracyclines and/or phenicols. SNP-based phylogenomic investigation confirmed clonal relatedness with high-risk lineages circulating at the human-animal-environmental interface globally. Our results confirm the dissemination of WHO priority CTX-M-positive E. coli in urban rodents and pigeons in Brazil, highlighting potential of these animals as infection sources and hotspot for dissemination of clinically relevant pathogens and their resistance genes, which is a critical issue within a One Health perspective.

16.
J Glob Antimicrob Resist ; 33: 256-259, 2023 06.
Artigo em Inglês | MEDLINE | ID: mdl-37098384

RESUMO

OBJECTIVES: The aim of this study was to perform a genomic investigation of a multiple fluoroquinolone-resistant Leclercia adecarboxylata strain isolated from a synanthropic pigeon in São Paulo, Brazil. METHODS: Whole-genome sequencing was performed using an Illumina platform, and in silico deep analyses of the resistome were performed. Comparative phylogenomics was conducted using a global collection of publicly available genomes of L. adecarboxylata strains isolated from human and animal hosts. RESULTS: L. adecarboxylata strain P62P1 displayed resistance to human (norfloxacin, ofloxacin, ciprofloxacin, and levofloxacin) and veterinary (enrofloxacin) fluoroquinolones. This multiple quinolone-resistant profile was associated with mutations in the gyrA (S83I) and parC (S80I) genes and the presence of the qnrS gene within an ISKpn19-orf-qnrS1-ΔIS3-blaLAP-2 module, previously identified in L. adecarboxylata strains isolated from pig feed and faeces in China. Genes associated with arsenic, silver, copper, and mercury resistance were also predicted. Phylogenomic analysis revealed clustering (378-496 single nucleotide polymorphism differences) with two L. adecarboxylata strains isolated from human and fish sources in China and Portugal, respectively. CONCLUSIONS: L. adecarboxylata is a Gram-negative bacterium of the Enterobacterales order and is considered an emergent opportunistic pathogen. Since L. adecarboxylata has adapted to human and animal hosts, genomic surveillance is highly recommended, in order to identify the emergence and spread of resistant lineages and high-risk clones. In this regard, this study provides genomic data that can help clarify the role of synanthropic animals in the dissemination of clinically relevant L. adecarboxylata within a One Health context.


Assuntos
Columbidae , Fluoroquinolonas , Humanos , Animais , Suínos , Fluoroquinolonas/farmacologia , Brasil , DNA Girase/genética , Testes de Sensibilidade Microbiana , Genômica
17.
Microb Drug Resist ; 28(10): 957-961, 2022 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-35984997

RESUMO

An unusual biotype of KPC-2-producing Klebsiella pneumoniae (KPC-Kpn) isolates was detected in Corrientes, Argentina, which, to their isolation date, had been free of KPC-Kpn outbreaks. Our aim was to describe the clinical epidemiology focused on genomic characterization of atypical urease-negative KPC-Kpn clinical isolates belonging to the high-risk hospital-associated clonal lineage ST340/CC258. Thirteen isolates were recovered, all of them from inpatients with KPC-Kpn infection (August 2015 to January 2016). These isolates displayed identical enterobacterial repetitive intergenic consensus-PCR electropherotype belonging to a single clonal sequence type ST340. Whole genome sequencing was performed on two KPC-Kpn and the resistome analyses revealed the following acquired resistance genes: blaKPC-2, blaCTX-M-15, blaOXA-1, blaSHV-11, aac(3)-IId, aph(3')-Ia, aac(6')-Ib-cr, sul1, dfrA14, catB3, fosA, and arr-3. Mutations in GyrA (S83I) and ParC (S80I) were also identified. Among the virulence determinants, yersiniabactin was detected in both strains, specifically the ybt9 locus located in ICEKp3. Five plasmid incompatibility groups were observed in this clone and an unusual IncP6 plasmid bearing blaKPC-2 gene (named pKpn3KP) was fully characterized. In this study, we present the first draft genome sequences of two clinical isolates of KPC-2/CTX-M-15-producing K. pneumoniae belonging to the high-risk clonal lineage ST340/CC258 associated with nosocomial outbreaks in Argentina.


Assuntos
Infecções por Klebsiella , Klebsiella pneumoniae , Humanos , Infecções por Klebsiella/epidemiologia , Infecções por Klebsiella/microbiologia , beta-Lactamases/genética , Urease/genética , Antibacterianos/farmacologia , Plasmídeos/genética , Tipagem de Sequências Multilocus
18.
Braz J Microbiol ; 53(4): 2121-2131, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-35864380

RESUMO

Escherichia coli are gut commensal bacteria and opportunistic pathogens, and the emergence of antimicrobial resistance threatens the safety of the food chain. To know the E. coli strains circulating in the Brazilian poultry sector is important since the country corresponds to a significant chicken meat production. Thus, we analyzed 90 publicly genomes available in a database using web-based tools. Genomic analysis revealed that sul alleles were the most detected resistance genes, followed by aadA, blaCTX-M, and dfrA. Plasmids of the IncF family were important, followed by IncI1-Iα, Col-like, and p0111. Genes of specific metabolic pathways that contribute to virulence (terC and gad) were predominant, followed by sitA, traT, and iss. Additionally, pap, usp, vat, sfa/foc, ibeA, cnf1, eae, and sat were also predicted. In this regard, 11 E. coli were characterized as avian pathogenic E. coli and one as atypical enteropathogenic E. coli. Phylogenetic analysis confirmed the predominant occurrence of B1 but also A, D, B2, F, E, G, C, and Clade I phylogroups, whereas international clones ST38, ST73, ST117, ST155, and ST224 were predicted among 53 different sequence types identified. Serotypes O6:H1 and:H25 were prevalent, and fimH31 and fimH32 were the most representatives among the 36 FimH types detected. Finally, single nucleotide polymorphisms-based phylogenetic analysis confirmed high genomic diversity among E. coli strains. While international E. coli clones have adapted to the Brazilian poultry sector, the virulome background of these strains support a pathogenic potential to humans and animals, with lineages carrying resistance genes that can lead to hard-to-treat infections.


Assuntos
Escherichia coli Enteropatogênica , Infecções por Escherichia coli , Animais , Antibacterianos , Brasil , Galinhas/microbiologia , Infecções por Escherichia coli/microbiologia , Genômica , Filogenia , Aves Domésticas/microbiologia , Fatores de Virulência/genética
19.
Sci Total Environ ; 823: 153590, 2022 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-35122850

RESUMO

Mining dam disasters contribute to the contamination of aquatic environments, impacting associated ecosystems and wildlife. A multidrug-resistant Escherichia coli strain (B2C) was isolated from a river water sample in Brazil after the Mariana mining dam disaster. The genome was sequenced using the Illumina MiSeq platform, and de novo assembled using Unicycler. Resistome, virulome, and plasmidome were predicted using bioinformatics tools. Data analysis revealed that E. coli B2C belonged to sequence type ST219 and phylogroup E. Strikingly, a broad resistome (antibiotics, hazardous heavy metals, and biocides) was predicted, including the presence of the clinically relevant blaCTX-M-2 extended-spectrum ß-lactamase (ESBL) gene, qacE∆1 efflux pump gene, and the mer (mercury resistance) operon. SNP-based analysis revealed that environmental E. coli B2C was clustered along to ESBL-negative E. coli strains of ST219 isolated between 1980 and 2021 from livestock in the United States of America. Acquisition of clinically relevant genes by ST219 seems to be a recent genetic event related to anthropogenic activities, where polluted water environments may contribute to its dissemination at the human-animal-environment interface. In addition, the presence of genes conferring resistance to heavy metals could be related to environmental pollution from mining activities. Antimicrobial resistance genes could be essential biomarkers of environmental exposure to human and mining pollution.


Assuntos
Desastres , Proteínas de Escherichia coli , Mercúrio , Animais , Antibacterianos/farmacologia , Brasil , Farmacorresistência Bacteriana Múltipla/genética , Ecossistema , Escherichia coli , Proteínas de Escherichia coli/genética , Mercúrio/toxicidade , beta-Lactamases/genética
20.
One Health ; 15: 100414, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36277105

RESUMO

Extended spectrum ß-lactamase (ESBL)-producing Klebsiella pneumoniae is a medically important pathogen that commonly causes human nosocomial infections. Since veterinary emergency and critical care services have also significantly progressed over the last decades, there are increasing reports of ESBL-producing K. pneumoniae causing hospital-associated infections in companion animals. We present microbiological and genomic analysis of a multidrug-resistant ESBL-positive K. pneumoniae (LCKp01) isolated from a fatal infection in a dog admitted to a veterinary intensive care unit. LCKp01 strain belonged to the sequence type ST392 and displays a KL27 (wzi-187) and O-locus 4 (O4). A broad resistome and presence of the bla CTX-M-15 ESBL gene were predicted. SNP-based phylogenomic analysis, using an international genome database, clustered LCKp01 (60-80 SNPs differences) with K. pneumoniae ST392 from human and animal infections, isolated at 4-year interval, whereas phylogeographical analysis confirmed successful expansion of ST392 as a global clone of One Health concern.

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