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Registro completo
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Biblioteca (s) : |
INIA Las Brujas. |
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Fecha : |
10/05/2019 |
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Actualizado : |
10/05/2019 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Autor : |
GONZÁLEZ-ARCOS, M.; DE NORONHA FONSECA, M.E.; ZANDONADI, D.B.; PERES, L.E.P.; ARRUABARRENA, A.; FERREIRA, D.S.; KEVEI, Z.; MOHAREB, F.; THOMPSON, A.J.; BOITEUX, L.S. |
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Afiliación : |
MATIAS GONZÁLEZ-ARCOS, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; MARIA ESTHER DE NORONHA FONSECA, Nacional Center for Vegetable Crops Research (CNPH) – Embrapa Vegetable Crops (Hortaliças), Brazil; DANIEL BASÍLIO ZANDONADI, Universidade Federal do Rio de Janeiro (UFRJ), Nupem, Macaé, Brazil; LÁZARO E. P. PERES, Laboratory of Hormonal Control of Plant Development, Departamento de Ciências Biológicas, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo (ESALQ/USP), Piracicaba, Brazil; ANA ARRUABARRENA PASCOVICH, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; DEMETRYUS S. FERREIRA, Cranfield Soil and Agrifood Institute, Cranfield University, Cranfield, UK.; ZOLTAN KEVEI, Cranfield Soil and Agrifood Institute, Cranfield University, Cranfield, UK.; FADY MOHAREB, Cranfield Soil and Agrifood Institute, Cranfield University, Cranfield, UK.; ANDREW J. THOMPSON, Cranfield Soil and Agrifood Institute, Cranfield University, Cranfield, UK.; LEONARDO S. BOITEUX, Nacional Center for Vegetable Crops Research (CNPH) – Embrapa Vegetable Crops (Hortaliças), Brasília, Brazil. |
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Título : |
A loss-of-function allele of a TAC1-like gene (SlTAC1) located on tomato chromosome 10 is a candidate for the Erectoid leaf (Erl) mutation. |
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Fecha de publicación : |
2019 |
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Fuente / Imprenta : |
Euphytica, 1 May 2019, Volume 215, Issue 5, Article number 95. |
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ISSN : |
0014-2336 |
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DOI : |
10.1007/s10681-019-2418-1 |
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Idioma : |
Inglés |
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Notas : |
Article history: Received: 21 December 2018 / Accepted: 10 April 2019 / First Online: 16 April 2019.
This work was done in the context of MG-A doctoral studies program at the Facultad de Agronomía, Universidad de la República Oriental del Uruguay. We thank A. Manzzioni, I. Laxague and N. Zunini of INIA Salto Grande, and W. P. Dutra and A. F. Costa of Embrapa Vegetable Crops, for their assistance in conducting some of the experiments. LSB and MENF were supported by CNPq and CAPES grants. AJT and FM were supported by BBSRC Research Grant BB/ L011611/1. |
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Contenido : |
ABSTRACT.
The genetic basis of an erectoid leaf phenotype was investigated in distinct tomato breeding populations, including one derived from Solanum lycopersicum ?LT05? (with the erectoid leaf phenotype and uniform ripening, genotype uu) × S. pimpinellifollium ?TO-937? (with the wild-type leaf phenotype and green fruit shoulder, genotype UU). The erectoid leaf phenotype was inherited as a semi-dominant trait and it co-segregated with the u allele of gene SlGLK2 (Solyc10g008160). This genomic location coincides with a previously described semi-dominant mutation named as Erectoid leaf (Erl). The genomes of ?LT05?, ?TO-937?, and three other unrelated accessions (with the wild-type Erl + allele) were resequenced with the aim of identifying candidate genes. Comparative genomic analyses, including the reference genome ?Heinz 1706? (Erl + allele), identified an Erectoid leaf-specific single nucleotide polymorphism (SNP) in the gene Solyc10g009320. This SNP caused a change of a glutamine codon (present in all the wild-type genomes) to a TAA (= ochre stop-codon) in the Erl allele, resulting in a smaller version of the predicted mutant protein (221 vs. 279 amino acids). Solyc10g009320, previously annotated as an ?unknown protein?, was identified as a TILLER ANGLE CONTROL1-like gene. Linkage between the Erl and Solyc10g009320 was confirmed via Sanger sequencing of the PCR amplicons of the two variant alleles. No recombinants were detected in 265 F 2 individuals. Contrasting S 7 near-isogenic lines were also homozygous for each of the alternate alleles, reinforcing Solyc10g009320 as a strong Erl candidate gene and opening the possibility for fine-tuning manipulation of tomato architecture in breeding programs.
© 2019, Springer Nature B.V. MenosABSTRACT.
The genetic basis of an erectoid leaf phenotype was investigated in distinct tomato breeding populations, including one derived from Solanum lycopersicum ?LT05? (with the erectoid leaf phenotype and uniform ripening, genotype uu) × S. pimpinellifollium ?TO-937? (with the wild-type leaf phenotype and green fruit shoulder, genotype UU). The erectoid leaf phenotype was inherited as a semi-dominant trait and it co-segregated with the u allele of gene SlGLK2 (Solyc10g008160). This genomic location coincides with a previously described semi-dominant mutation named as Erectoid leaf (Erl). The genomes of ?LT05?, ?TO-937?, and three other unrelated accessions (with the wild-type Erl + allele) were resequenced with the aim of identifying candidate genes. Comparative genomic analyses, including the reference genome ?Heinz 1706? (Erl + allele), identified an Erectoid leaf-specific single nucleotide polymorphism (SNP) in the gene Solyc10g009320. This SNP caused a change of a glutamine codon (present in all the wild-type genomes) to a TAA (= ochre stop-codon) in the Erl allele, resulting in a smaller version of the predicted mutant protein (221 vs. 279 amino acids). Solyc10g009320, previously annotated as an ?unknown protein?, was identified as a TILLER ANGLE CONTROL1-like gene. Linkage between the Erl and Solyc10g009320 was confirmed via Sanger sequencing of the PCR amplicons of the two variant alleles. No recombinants were detected in 265 F 2 individuals. Contrasting S 7 near-... Presentar Todo |
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Palabras claves : |
Breeding; Comparative genomic analysis; Plant architecture; Resequencing; Solanum lycopersicum. |
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Thesagro : |
TOMATE. |
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Asunto categoría : |
F01 Cultivo |
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Marc : |
LEADER 03339naa a2200337 a 4500
001 1059755
005 2019-05-10
008 2019 bl uuuu u00u1 u #d
022 $a0014-2336
024 7 $a10.1007/s10681-019-2418-1$2DOI
100 1 $aGONZÁLEZ-ARCOS, M.
245 $aA loss-of-function allele of a TAC1-like gene (SlTAC1) located on tomato chromosome 10 is a candidate for the Erectoid leaf (Erl) mutation.$h[electronic resource]
260 $c2019
500 $aArticle history: Received: 21 December 2018 / Accepted: 10 April 2019 / First Online: 16 April 2019. This work was done in the context of MG-A doctoral studies program at the Facultad de Agronomía, Universidad de la República Oriental del Uruguay. We thank A. Manzzioni, I. Laxague and N. Zunini of INIA Salto Grande, and W. P. Dutra and A. F. Costa of Embrapa Vegetable Crops, for their assistance in conducting some of the experiments. LSB and MENF were supported by CNPq and CAPES grants. AJT and FM were supported by BBSRC Research Grant BB/ L011611/1.
520 $aABSTRACT. The genetic basis of an erectoid leaf phenotype was investigated in distinct tomato breeding populations, including one derived from Solanum lycopersicum ?LT05? (with the erectoid leaf phenotype and uniform ripening, genotype uu) × S. pimpinellifollium ?TO-937? (with the wild-type leaf phenotype and green fruit shoulder, genotype UU). The erectoid leaf phenotype was inherited as a semi-dominant trait and it co-segregated with the u allele of gene SlGLK2 (Solyc10g008160). This genomic location coincides with a previously described semi-dominant mutation named as Erectoid leaf (Erl). The genomes of ?LT05?, ?TO-937?, and three other unrelated accessions (with the wild-type Erl + allele) were resequenced with the aim of identifying candidate genes. Comparative genomic analyses, including the reference genome ?Heinz 1706? (Erl + allele), identified an Erectoid leaf-specific single nucleotide polymorphism (SNP) in the gene Solyc10g009320. This SNP caused a change of a glutamine codon (present in all the wild-type genomes) to a TAA (= ochre stop-codon) in the Erl allele, resulting in a smaller version of the predicted mutant protein (221 vs. 279 amino acids). Solyc10g009320, previously annotated as an ?unknown protein?, was identified as a TILLER ANGLE CONTROL1-like gene. Linkage between the Erl and Solyc10g009320 was confirmed via Sanger sequencing of the PCR amplicons of the two variant alleles. No recombinants were detected in 265 F 2 individuals. Contrasting S 7 near-isogenic lines were also homozygous for each of the alternate alleles, reinforcing Solyc10g009320 as a strong Erl candidate gene and opening the possibility for fine-tuning manipulation of tomato architecture in breeding programs. © 2019, Springer Nature B.V.
650 $aTOMATE
653 $aBreeding
653 $aComparative genomic analysis
653 $aPlant architecture
653 $aResequencing
653 $aSolanum lycopersicum
700 1 $aDE NORONHA FONSECA, M.E.
700 1 $aZANDONADI, D.B.
700 1 $aPERES, L.E.P.
700 1 $aARRUABARRENA, A.
700 1 $aFERREIRA, D.S.
700 1 $aKEVEI, Z.
700 1 $aMOHAREB, F.
700 1 $aTHOMPSON, A.J.
700 1 $aBOITEUX, L.S.
773 $tEuphytica, 1 May 2019, Volume 215, Issue 5, Article number 95.
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INIA Las Brujas. |
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Fecha actual : |
25/01/2022 |
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Actualizado : |
25/01/2022 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Circulación / Nivel : |
Internacional - -- |
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Autor : |
LOUGE URIARTE, E.; GONZÁLEZ PASAYO, R.; MASSÓ, M.; CARRERA PAÉZ, L.; DOMÍNGUEZ MONCLA, M.; DONIS, N.; MALENA, R.; MÉNDEZ, A.; MORRELL, E.; GIANNITTI, F.; ARMENDANO, J.I.; FAVERIN, C.; CENTRÓN, D.; PARREÑO, V.; ODEÓN, A.C.; QUIROGA, M.P.; MOREIRA, A.R. |
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Afiliación : |
ENRIQUE L. LOUGE URIARTE, Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto de Innovación para la Producción Agropecuaria y Desarrollo Sostenible, INTA-Consejo Nacional de Investigaciones Científicas y Técnicas (IPADS, INTA-CONICET), Balcarce, Buenos Aires, Argentina; RAMÓN A. GOZÁLEZ PASAYO, Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto de Innovación para la Producción Agropecuaria y Desarrollo Sostenible, INTA-Consejo Nacional de Investigaciones Científicas y Técnicas (IPADS, INTA-CONICET), Balcarce, Buenos Aires, Argentina; MARIANA MASSÓ, Instituto de Investigaciones en Microbiología y Parasitología Médica, Facultad de Medicina, Universidad de Buenos Aires-Consejo Nacional de Investigaciones Científicas y Técnicas (IMPaM, UBA-CONICET), Ciudad Autónoma de Buenos Aires, C1121ABG, Argentina; LAURA CARRERA PAÉZ, Instituto de Investigaciones en Microbiología y Parasitología Médica, Facultad de Medicina, Universidad de Buenos Aires-Consejo Nacional de Investigaciones Científicas y Técnicas (IMPaM, UBA-CONICET), Ciudad Autónoma de Buenos Aires, C1121ABG, Argentina; MANUEL DOMÍNGUEZ MONCLA, Instituto de Investigaciones en Microbiología y Parasitología Médica, Facultad de Medicina, Universidad de Buenos Aires-Consejo Nacional de Investigaciones Científicas y Técnicas (IMPaM, UBA-CONICET), Ciudad Autónoma de Buenos Aires, C1121ABG, Argentina; NICOLÁS DONIS, Instituto de Investigaciones en Microbiología y Parasitología Médica, Facultad de Medicina, Universidad de Buenos Aires-Consejo Nacional de Investigaciones Científicas y Técnicas (IMPaM, UBA-CONICET), Ciudad Autónoma de Buenos Aires, C1121ABG, Argentina; ROSANA MALENA, Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto de Innovación para la Producción Agropecuaria y Desarrollo Sostenible, INTA-Consejo Nacional de Investigaciones Científicas y Técnicas (IPADS, INTA-CONICET), Balcarce, Buenos Aires, Argentina; ALEJANDRA MÉNDEZ, Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto de Innovación para la Producción Agropecuaria y Desarrollo Sostenible, INTA-Consejo Nacional de Investigaciones Científicas y Técnicas (IPADS, INTA-CONICET), Balcarce, Buenos Aires, Argentina; ELEONORA MORRELL, Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto de Innovación para la Producción Agropecuaria y Desarrollo Sostenible, INTA-Consejo Nacional de Investigaciones Científicas y Técnicas (IPADS, INTA-CONICET), Balcarce, Buenos Aires, Argentina; FEDERICO GIANNITTI, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; JOAQUÍN I. ARMENDANO, Departamento de Fisiopatología, Facultad de Ciencias Veterinarias, Universidad Nacional del Centro de la Provincia de Buenos Aires, Paraje Arroyo Seco s/n, Tandil, 7000, Argentina; CLAUDIA FAVERIN, Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto de Innovación para la Producción Agropecuaria y Desarrollo Sostenible, INTA-Consejo Nacional de Investigaciones Científicas y Técnicas (IPADS, INTA-CONICET), Balcarce, Buenos Aires, Argentina; DANIELA CENTRÓN, Instituto de Investigaciones en Microbiología y Parasitología Médica, Facultad de Medicina, Universidad de Buenos Aires-Consejo Nacional de Investigaciones Científicas y Técnicas (IMPaM, UBA-CONICET), Ciudad Autónoma de Buenos Aires, C1121ABG, Argentina; VIVIANA PARREÑO, Incuinta, Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto de Virología e Innovaciones Tecnológicas, INTA-Consejo Nacional de Investigaciones Científicas y Técnicas (IVIT, INTA-CONICET), Castelar, Buenos Aires, 1712, Argentina; ANSELMO C. ODEÓN, Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto de Innovación para la Producción Agropecuaria y Desarrollo Sostenible, INTA-Consejo Nacional de Investigaciones Científicas y Técnicas (IPADS, INTA-CONICET), Balcarce, Buenos Aires, Argentina; MARÍA PAULA QUIROGA, Instituto de Investigaciones en Microbiología y Parasitología Médica, Facultad de Medicina, Universidad de Buenos Aires-Consejo Nacional de Investigaciones Científicas y Técnicas (IMPaM, UBA-CONICET), Ciudad Autónoma de Buenos Aires, C1121ABG, Argentina; ANA RITA MOREIRA, Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto de Innovación para la Producción Agropecuaria y Desarrollo Sostenible, INTA-Consejo Nacional de Investigaciones Científicas y Técnicas (IPADS, INTA-CONICET), Balcarce, Buenos Aires, Argentina. |
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Título : |
Molecular characterization of multidrug-resistant Escherichia coli of the phylogroups A and C in dairy calves with meningitis and septicemia. |
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Fecha de publicación : |
2022 |
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Fuente / Imprenta : |
Microbial Pathogenesis, 2022, Volume 163, Article number 105378. doi: https://doi.org/10.1016/j.micpath.2021.105378 |
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ISSN : |
0882-4010 |
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DOI : |
10.1016/j.micpath.2021.105378 |
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Idioma : |
Inglés |
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Notas : |
Article history: Received 8 October 2021; Received in revised form 21 December 2021; Accepted 28 December 2021; Available online 1 January 2022.
Corresponding authors: Louge Uriarte, E.L.; Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto de Innovación para la Producción Agropecuaria y Desarrollo Sostenible, INTA-Consejo Nacional de Investigaciones Científicas y Técnicas (IPADS, INTA-CONICET), Ruta 226 km 73.5, Balcarce, Buenos Aires, Argentina; email:lougeuriarte.enrique@inta.gob.ar --- Quiroga, M.P.; Instituto de Investigaciones en Microbiología y Parasitología Médica, Facultad de Medicina, Universidad de Buenos Aires-Consejo Nacional de Investigaciones Científicas y Técnicas (IMPaM, UBA-CONICET), Ciudad Autónoma de Buenos Aires, Argentina; email:paula.quiroga@conicet.gov.ar -- |
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Contenido : |
ABSTRACT.- Escherichia coli is an important cause of septicemia (SEPEC) and neonatal meningitis (NMEC) in dairy calves. However, the diversity of virulence profiles, phylogroups, antimicrobial resistance patterns, carriage of integron structures, and fluoroquinolone (FQ) resistance mechanisms have not been fully investigated. Also, there is a paucity of knowledge about the virulence profiles and frequency of potential SEPEC in feces from calves with or without diarrhea. This study aimed to characterize the virulence potential, phylogroups, antimicrobial susceptibility, integron content, and FQ-resistance mechanisms in Escherichia coli isolated from calves with meningitis and septicemia. Additionally, the virulence genes (VGs) and profiles of E. coli isolated from diarrheic and non-diarrheic calves were compared between them and together with NMEC and SEPEC in order to identify shared profiles. Tissue and fluid samples from eight dairy calves with septicemia, four of which had concurrent meningitis, were processed for bacteriology and histopathology. Typing of VGs was assessed in 166 isolates from diverse samples of each calf. Selected isolates were evaluated for antimicrobial susceptibility by the disk diffusion test. Phylogroups, integron gene cassettes cartography, and FQ-resistance determinants were analyzed by PCR, sequencing, and bioinformatic tools. Furthermore, 109 fecal samples and 700 fecal isolates from dairy calves with or without diarrhea were evaluated to detect 19 VGs by uniplex PCR. Highly diverse VG profiles were characterized among NMEC and SEPEC isolates, but iucD was the predominant virulence marker. Histologic lesions in all calves supported their pathogenicity. Selected isolates mainly belonged to phylogroups A and C and showed multidrug resistance. Classic (dfrA17 and arr3-dfrA27) and complex (dfrA17-aadA5::ISCR1::blaCTX-M-2) class 1 integrons were identified. Target-site mutations in GyrA (S83L and D87N) and ParC (S80I) encoding genes were associated with FQ resistance. The VGs detected more frequently in fecal samples included f17G (50%), papC (30%), iucD (20%), clpG (19%), eae (16%), and afaE-8 (13%). Fecal isolates displaying the profiles of f17 or potential SEPEC were found in 25% of calves with and without diarrhea. The frequency of E. coli VGs and profiles did not differ between both groups (p > 0.05) and were identical or similar to those found in NMEC and SEPEC. Overall, multidrug-resistant E. coli isolates with diverse VG profiles and belonging to phylogroups A and C can be implicated in natural cases of meningitis and septicemia. Their resistance phenotypes can be partially explained by class 1 integron gene cassettes and target-site mutations in gyrA and parC. These results highlight the value of antimicrobial resistance surveillance in pathogenic bacteria isolated from food-producing animals. Besides, calves frequently shed potential SEPEC in their feces as commensals (?Trojan horse?). Thus, these bacteria may be disseminated in the farm environment, causing septicemia and meningitis under predisposing factors.
© 2022 Elsevier Ltd MenosABSTRACT.- Escherichia coli is an important cause of septicemia (SEPEC) and neonatal meningitis (NMEC) in dairy calves. However, the diversity of virulence profiles, phylogroups, antimicrobial resistance patterns, carriage of integron structures, and fluoroquinolone (FQ) resistance mechanisms have not been fully investigated. Also, there is a paucity of knowledge about the virulence profiles and frequency of potential SEPEC in feces from calves with or without diarrhea. This study aimed to characterize the virulence potential, phylogroups, antimicrobial susceptibility, integron content, and FQ-resistance mechanisms in Escherichia coli isolated from calves with meningitis and septicemia. Additionally, the virulence genes (VGs) and profiles of E. coli isolated from diarrheic and non-diarrheic calves were compared between them and together with NMEC and SEPEC in order to identify shared profiles. Tissue and fluid samples from eight dairy calves with septicemia, four of which had concurrent meningitis, were processed for bacteriology and histopathology. Typing of VGs was assessed in 166 isolates from diverse samples of each calf. Selected isolates were evaluated for antimicrobial susceptibility by the disk diffusion test. Phylogroups, integron gene cassettes cartography, and FQ-resistance determinants were analyzed by PCR, sequencing, and bioinformatic tools. Furthermore, 109 fecal samples and 700 fecal isolates from dairy calves with or without diarrhea were evaluated to detect... Presentar Todo |
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Palabras claves : |
CALVES; E. COLI; Integrons; Multidrug resistance; Phylogroups; Quinolone resistance-determining region (QRDR) mutations; Virulence genes. |
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Asunto categoría : |
L10 Genética y mejoramiento animal |
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Marc : |
LEADER 05268naa a2200433 a 4500
001 1062698
005 2022-01-25
008 2022 bl uuuu u00u1 u #d
022 $a0882-4010
024 7 $a10.1016/j.micpath.2021.105378$2DOI
100 1 $aLOUGE URIARTE, E.
245 $aMolecular characterization of multidrug-resistant Escherichia coli of the phylogroups A and C in dairy calves with meningitis and septicemia.$h[electronic resource]
260 $c2022
500 $aArticle history: Received 8 October 2021; Received in revised form 21 December 2021; Accepted 28 December 2021; Available online 1 January 2022. Corresponding authors: Louge Uriarte, E.L.; Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto de Innovación para la Producción Agropecuaria y Desarrollo Sostenible, INTA-Consejo Nacional de Investigaciones Científicas y Técnicas (IPADS, INTA-CONICET), Ruta 226 km 73.5, Balcarce, Buenos Aires, Argentina; email:lougeuriarte.enrique@inta.gob.ar --- Quiroga, M.P.; Instituto de Investigaciones en Microbiología y Parasitología Médica, Facultad de Medicina, Universidad de Buenos Aires-Consejo Nacional de Investigaciones Científicas y Técnicas (IMPaM, UBA-CONICET), Ciudad Autónoma de Buenos Aires, Argentina; email:paula.quiroga@conicet.gov.ar --
520 $aABSTRACT.- Escherichia coli is an important cause of septicemia (SEPEC) and neonatal meningitis (NMEC) in dairy calves. However, the diversity of virulence profiles, phylogroups, antimicrobial resistance patterns, carriage of integron structures, and fluoroquinolone (FQ) resistance mechanisms have not been fully investigated. Also, there is a paucity of knowledge about the virulence profiles and frequency of potential SEPEC in feces from calves with or without diarrhea. This study aimed to characterize the virulence potential, phylogroups, antimicrobial susceptibility, integron content, and FQ-resistance mechanisms in Escherichia coli isolated from calves with meningitis and septicemia. Additionally, the virulence genes (VGs) and profiles of E. coli isolated from diarrheic and non-diarrheic calves were compared between them and together with NMEC and SEPEC in order to identify shared profiles. Tissue and fluid samples from eight dairy calves with septicemia, four of which had concurrent meningitis, were processed for bacteriology and histopathology. Typing of VGs was assessed in 166 isolates from diverse samples of each calf. Selected isolates were evaluated for antimicrobial susceptibility by the disk diffusion test. Phylogroups, integron gene cassettes cartography, and FQ-resistance determinants were analyzed by PCR, sequencing, and bioinformatic tools. Furthermore, 109 fecal samples and 700 fecal isolates from dairy calves with or without diarrhea were evaluated to detect 19 VGs by uniplex PCR. Highly diverse VG profiles were characterized among NMEC and SEPEC isolates, but iucD was the predominant virulence marker. Histologic lesions in all calves supported their pathogenicity. Selected isolates mainly belonged to phylogroups A and C and showed multidrug resistance. Classic (dfrA17 and arr3-dfrA27) and complex (dfrA17-aadA5::ISCR1::blaCTX-M-2) class 1 integrons were identified. Target-site mutations in GyrA (S83L and D87N) and ParC (S80I) encoding genes were associated with FQ resistance. The VGs detected more frequently in fecal samples included f17G (50%), papC (30%), iucD (20%), clpG (19%), eae (16%), and afaE-8 (13%). Fecal isolates displaying the profiles of f17 or potential SEPEC were found in 25% of calves with and without diarrhea. The frequency of E. coli VGs and profiles did not differ between both groups (p > 0.05) and were identical or similar to those found in NMEC and SEPEC. Overall, multidrug-resistant E. coli isolates with diverse VG profiles and belonging to phylogroups A and C can be implicated in natural cases of meningitis and septicemia. Their resistance phenotypes can be partially explained by class 1 integron gene cassettes and target-site mutations in gyrA and parC. These results highlight the value of antimicrobial resistance surveillance in pathogenic bacteria isolated from food-producing animals. Besides, calves frequently shed potential SEPEC in their feces as commensals (?Trojan horse?). Thus, these bacteria may be disseminated in the farm environment, causing septicemia and meningitis under predisposing factors. © 2022 Elsevier Ltd
653 $aCALVES
653 $aE. COLI
653 $aIntegrons
653 $aMultidrug resistance
653 $aPhylogroups
653 $aQuinolone resistance-determining region (QRDR) mutations
653 $aVirulence genes
700 1 $aGONZÁLEZ PASAYO, R.
700 1 $aMASSÓ, M.
700 1 $aCARRERA PAÉZ, L.
700 1 $aDOMÍNGUEZ MONCLA, M.
700 1 $aDONIS, N.
700 1 $aMALENA, R.
700 1 $aMÉNDEZ, A.
700 1 $aMORRELL, E.
700 1 $aGIANNITTI, F.
700 1 $aARMENDANO, J.I.
700 1 $aFAVERIN, C.
700 1 $aCENTRÓN, D.
700 1 $aPARREÑO, V.
700 1 $aODEÓN, A.C.
700 1 $aQUIROGA, M.P.
700 1 $aMOREIRA, A.R.
773 $tMicrobial Pathogenesis, 2022, Volume 163, Article number 105378. doi: https://doi.org/10.1016/j.micpath.2021.105378
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