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Master's Dissertation
DOI
https://doi.org/10.11606/D.42.2022.tde-07122022-180924
Document
Author
Full name
Elder Sano Pereira
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2022
Supervisor
Committee
Huenuman, Nilton Erbet Lincopan (President)
Aires, Caio Augusto Martins
Ferreira, Rita de Cassia Cafe
Silva, André Pitondo da
Title in Portuguese
Caracterização genômica de bactérias multirresistentes isoladas de animais sinantrópicos
Keywords in Portuguese
Filogenômica
Plasmidoma
Pombos
Resistoma
Roedores
Abstract in Portuguese
Bactérias resistentes às cefalosporinas de espectro estendido e/ou carbapenêmicos, classificadas como patógenos prioritários pela OMS, vêm se disseminando para além dos ambientes hospitalares, chegando a colonizar animais sinantrópicos como pombos (Columba livia) e roedores (Rattus rattus, Rattus norvegicus e Mus musculus), com potencial para integrar sistemas de sentinelas para o biomonitoramento de ambientes antropogenicamente impactados. No presente estudo foi investigada a ocorrência de bactérias Gram-negativas resistentes a antibióticos de relevância clínica em animais sinantrópicos da cidade de São Paulo. Cepas multirresistentes de Escherichia coli (n = 5), Klebsiella pneumoniae (n = 1) e Leclercia adecarboxylata (n=1) foram isoladas de pombos e roedores triados em 2019. Os isolados tiveram seu genoma completo sequenciado. As análises de bioinformática predisseram a presença de genes de resistência e/ou mutações conferindo resistência a beta-lactâmicos (blaCTX-M, blaCMY, blaTEM, blaOXA, blaSHV, blaLAP), aminoglicosídeos (aac(3)-IIa, aac(6')-Ib-cr, aac(3)-IId, aadA, aph(3')-Ia, strA, strB), fluoroquinolonas (aac(6')-Ib-cr, qnrB, qnrS, gyrA-S83I, gyrA-S83L, gyrA-D87L, gyrA-S87N, parC-S80I, parE-S458A), sulfonamidas/trimetoprim (sul1, sul2, sul3, dfrA), tetraciclinas (tetA), fenicóis (floR, cmlA) e macrolídeos (mphA, mphB). Além disso, foram identificados genes de tolerância a arsênio, cobre, mercúrio, prata, clorexidina, peróxido de hidrogênio e compostos de quaternário de amônio. As cepas de E. coli pertencem aos STs 10, 155, 224 e 457, enquanto a cepa de K. pneumoniae pertence ao clone internacional ST307. A análise filogenômica destas cepas revelou similaridades com cepas de origem humana, confirmando o sucesso da expansão de clones internacionais de alto risco além do ambiente hospitalar, denotando um problema de Saúde Única, cuja dimensão deveria ser monitorada em um plano nacional de vigilância epidemiológica, ao passo que o potencial risco de transmissão zoonótica/zooantroponótica demanda adicional investigação.
Title in English
Genomic characterization of multidrug-resistant bacteria isolated from synanthropic animals
Keywords in English
Phylogenomic
Pigeons
Plasmidome
Resistome
Rodents
Abstract in English
WHO priority pathogens, as extended spectrum cephalosporin- and/or carbapenem-resistant bacteria, have disseminated beyond hospital settings, reaching the point to colonize synanthropic animals like pigeons (Columba livia) and rodents (Rattus rattus, Rattus norvegicus e Mus musculus), with potential to integrate biomonitoring sentinel systems of anthropogenic-impacted environments. In the present study, we investigated the occurrence of clinically relevant multidrug-resistant Gram-negative bacteria in synanthropic animals from São Paulo city, Brazil. Multi-drug resistant strains of Escherichia coli (n = 5), Klebsiella pneumoniae (n = 1), and Leclercia adecarboxylata (n=1) were isolated from pigeons and rodents screened in 2019. Isolates had their whole genome sequenced. Bioinformatic analyses predicted the presence of resistance genes and/or mutations conferring resistance to beta-lactams (blaCTX-M, blaCMY, blaTEM, blaOXA, blaSHV, blaLAP), aminoglycosides (aac(3)-IIa, aac(6')-Ib-cr, aac(3)-IId, aadA, aph(3')-Ia, strA, strB), fluoroquinolones (aac(6')-Ib-cr, qnrB, qnrS, gyrA-S83I, gyrA-S83L, gyrA-D87L, gyrA-S87N, parC-S80I, parE-S458A), sulfonamides/trimethoprim (sul1, sul2, sul3, dfrA), tetracyclines (tetA), phenicols (floR, cmlA) and macrolides (mphA, mphB). Besides, we identified genes that may increase tolerance to arsenic, copper, mercury, silver, chlorhexidine, hydrogen peroxide and quaternary ammonium compounds. E. coli strains belonged to STs 10, 155, 224 e 457, while K. pneumoniae strain belonged to international clone ST307. Phylogenomic analysis revelaed similarities with strains from human sources, confirming the expansion success of high-risk international clones beyond hospital environments, denoting a One Health problem, which dimension should be monitored within a national epidemiologic surveillance plan, while potential risk of zoonotic/zooanthroponotic transmission demands additional investigation.
 
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Release Date
2024-12-06
Publishing Date
2022-12-09
 
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