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| 2. |  | CORREA, C. A.; AVENDAÑO, R. L.; AVELAR, L. E.; PADILLA, R. G. R. Evaluacion de la eficiencia reproductiva de razas caprinas y dos epocas de empadre en Mixicali, B. C. Ciência e Investigacion Agrária, v. 20, n. 2, p. 77, 1993. Resúmenes de 13o. Reunión Asociacion Latinoamericana de Produccion Animal, Santiago de Chile, 1993.| Biblioteca(s): Embrapa Caprinos e Ovinos. |
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| 3. | | BAHIA, D.; MORTARA, R. A.; KUSEL, J. R.; ANDRADE, L. F.; LUDOLF, F.; KUSER, P. R.; AVELAR, L.; TROLET, J.; DISSOUS, C.; PIERCE, R. J.; OLIVEIRA, G. Schistosoma mansoni: expression of Fes-like tyrosine kinase SmFes in the tegument and terebratorium suggests its involvement in host penetration. Experimental Parasitology, v. 116, n. 3, p. 225-232, July 2007.| Biblioteca(s): Embrapa Agricultura Digital. |
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Registro Completo
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Biblioteca(s): |
Embrapa Suínos e Aves. |
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Data corrente: |
31/10/2017 |
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Data da última atualização: |
15/07/2019 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
PISSETTI, C.; KICH, J. D.; ALLEN, H. K.; NAVARRETE C.; PELLEGRINI, D. da C. P.; MORES, N.; CARDOSO, M. R. de I. |
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Afiliação: |
CAROLINE PISSETTI, UFRGS; JALUSA DEON KICH, CNPSA; HEATHER K. ALLEN, National Animal Disease Center/USA; CLAUDIA NAVARRETE, UFRGS; DÉBORA DA CRUZ PAYÃO PELLEGRINI, UNIPAMPA/Uruguaiana; NELSON MORES, CNPSA; MARIA RIBEIRO DE ITAPEMA CARDOSO, UFRGS. |
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Título: |
Escherichia coli resistance and gut microbiota profile in pigs raised with different antimicrobial administration in feed. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
In: INTERNATIONAL SIMPOSIUM ON THE EPIDEMIOLOGY AND CONTROL OF BIOLOGICAL, CHEMICAL AND PHYSICAL HAZARDS IN PIG AND PORK, 12., 2017, Foz do Iguaçu. Proceedings Book. Concórdia: Embrapa Suínos e Aves, 2017. p. 143-147. |
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Idioma: |
Inglês |
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Notas: |
SafePork 2017. |
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Conteúdo: |
Abstract: Antimicrobials have been widely used in veterinary medicine for disease treatment, disease prevention, and growth promotion. Although, the mechanisms about in-feed additives use are still not completely understood, it is accepted that its use improves feed efficiency by reducing the microbial load in the intestinal tract, thereby reducing the pressure on the immune system and increasing energy availability for the animal. However, disruption to commensal bacterial communities by antibiotics in some cases can increase the gut colonization by pathogenic bacteria. In this sense, the aim of this study was to evaluate the Escherichia coli antibiotic resistance and the gut microbiota profile from pigs raised in Brazilian farms with different in-feed antimicrobials protocols. Pigs from four farms with distinct antibiotic usage, including one farm that used no antibiotics, were followed from weaning to finishing, and the frequency of antimicrobial resistance and gut bacterial profile by 16S rRNA gene sequencing were evaluated. The gut microbial community structure was the same among all groups of pigs despite different antibiotic use on the farms; however, the antimicrobial resistance profiles of E. coli isolates were different between groups. One farm administered seven antibiotics at different times, and E. coli isolates from these pigs showed higher frequency of resistance and multidrug resistance as compared with samples from the farm that did not administer in-feed antimicrobials. The phenotypes included resistance to drugs considered critically important antimicrobial agents in veterinary medicine (ampicillin, ciprofloxacin, florfenicol, sulfonamide and tetracycline) as well as one highly important antibiotic in human medicine (colistin). Resistant E. coli strains were screened for the presence of the mcr-1 gene by PCR. The colistin-resistant strains were positive for the presence of the mcr-1 gene. These results suggest that although different antibiotic uses on-farm might not impact microbial community structure, it does impact bacterial functions, namely antibiotic resistance. Our results show that prudent use of antimicrobials is important for decreasing selective pressure for antibiotic resistance gene evolution MenosAbstract: Antimicrobials have been widely used in veterinary medicine for disease treatment, disease prevention, and growth promotion. Although, the mechanisms about in-feed additives use are still not completely understood, it is accepted that its use improves feed efficiency by reducing the microbial load in the intestinal tract, thereby reducing the pressure on the immune system and increasing energy availability for the animal. However, disruption to commensal bacterial communities by antibiotics in some cases can increase the gut colonization by pathogenic bacteria. In this sense, the aim of this study was to evaluate the Escherichia coli antibiotic resistance and the gut microbiota profile from pigs raised in Brazilian farms with different in-feed antimicrobials protocols. Pigs from four farms with distinct antibiotic usage, including one farm that used no antibiotics, were followed from weaning to finishing, and the frequency of antimicrobial resistance and gut bacterial profile by 16S rRNA gene sequencing were evaluated. The gut microbial community structure was the same among all groups of pigs despite different antibiotic use on the farms; however, the antimicrobial resistance profiles of E. coli isolates were different between groups. One farm administered seven antibiotics at different times, and E. coli isolates from these pigs showed higher frequency of resistance and multidrug resistance as compared with samples from the farm that did not administer in-feed an... Mostrar Tudo |
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Palavras-Chave: |
Resistência microbiana; Safe pork; Uso de antibióticos. |
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Thesagro: |
Bacteriologia; Escherichia coli; Suíno. |
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Categoria do assunto: |
-- |
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URL: |
https://www.alice.cnptia.embrapa.br/alice/bitstream/doc/1078530/1/final8689.pdf
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Marc: |
LEADER 03246nam a2200265 a 4500
001 2078530
005 2019-07-15
008 2017 bl uuuu u00u1 u #d
100 1 $aPISSETTI, C.
245 $aEscherichia coli resistance and gut microbiota profile in pigs raised with different antimicrobial administration in feed.$h[electronic resource]
260 $aIn: INTERNATIONAL SIMPOSIUM ON THE EPIDEMIOLOGY AND CONTROL OF BIOLOGICAL, CHEMICAL AND PHYSICAL HAZARDS IN PIG AND PORK, 12., 2017, Foz do Iguaçu. Proceedings Book. Concórdia: Embrapa Suínos e Aves, 2017. p. 143-147.$c2017
500 $aSafePork 2017.
520 $aAbstract: Antimicrobials have been widely used in veterinary medicine for disease treatment, disease prevention, and growth promotion. Although, the mechanisms about in-feed additives use are still not completely understood, it is accepted that its use improves feed efficiency by reducing the microbial load in the intestinal tract, thereby reducing the pressure on the immune system and increasing energy availability for the animal. However, disruption to commensal bacterial communities by antibiotics in some cases can increase the gut colonization by pathogenic bacteria. In this sense, the aim of this study was to evaluate the Escherichia coli antibiotic resistance and the gut microbiota profile from pigs raised in Brazilian farms with different in-feed antimicrobials protocols. Pigs from four farms with distinct antibiotic usage, including one farm that used no antibiotics, were followed from weaning to finishing, and the frequency of antimicrobial resistance and gut bacterial profile by 16S rRNA gene sequencing were evaluated. The gut microbial community structure was the same among all groups of pigs despite different antibiotic use on the farms; however, the antimicrobial resistance profiles of E. coli isolates were different between groups. One farm administered seven antibiotics at different times, and E. coli isolates from these pigs showed higher frequency of resistance and multidrug resistance as compared with samples from the farm that did not administer in-feed antimicrobials. The phenotypes included resistance to drugs considered critically important antimicrobial agents in veterinary medicine (ampicillin, ciprofloxacin, florfenicol, sulfonamide and tetracycline) as well as one highly important antibiotic in human medicine (colistin). Resistant E. coli strains were screened for the presence of the mcr-1 gene by PCR. The colistin-resistant strains were positive for the presence of the mcr-1 gene. These results suggest that although different antibiotic uses on-farm might not impact microbial community structure, it does impact bacterial functions, namely antibiotic resistance. Our results show that prudent use of antimicrobials is important for decreasing selective pressure for antibiotic resistance gene evolution
650 $aBacteriologia
650 $aEscherichia coli
650 $aSuíno
653 $aResistência microbiana
653 $aSafe pork
653 $aUso de antibióticos
700 1 $aKICH, J. D.
700 1 $aALLEN, H. K.
700 1 $aNAVARRETE C.
700 1 $aPELLEGRINI, D. da C. P.
700 1 $aMORES, N.
700 1 $aCARDOSO, M. R. de I.
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Embrapa Suínos e Aves (CNPSA) |
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