Experimental model for treatment of extended spectrum betalactamase producing-Klebsiella pneumoniae

Detalhes bibliográficos
Autor(a) principal: TOLEDO,Paula Virginia Michelon
Data de Publicação: 2014
Outros Autores: TUON,Felipe Francisco, BAIL,Larissa, MANENTE,Francine, ARRUDA,Polliane, ARANHA-JUNIOR,Ayrton Alves
Tipo de documento: Artigo
Idioma: eng
Título da fonte: ABCD. Arquivos Brasileiros de Cirurgia Digestiva (São Paulo)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-67202014000300168
Resumo: BACKGROUND: Animal models are useful to evaluate the efficacy of antimicrobials in experimental sepsis. AIM: To elucidate the steps of producing an experimental model for the treatment of extended-spectrum beta-lactamase (ESBL)-producing Klebsiella pneumoniae sepsis METHODS: Several ESBL inoculums ranging from 1.5x109 colony-forming units per milliliter (CFU/mL) to 2.0x1010 CFU/mL were administered by peritoneal injection in adults Wistar rats. Outcomes and microbiological data of quantitative peritoneal and blood cultures were observed in untreated animals. Animals which received 2.0x1010 CFU/mL inoculums were treated with single meropenem dose (30mg/kg) after one hour and those which received 1.0x1010 CFU/mL inoculums were treated immediately with three doses of meropenem 50 mg/kg. Outcomes were observed for 24 hours after inoculation. RESULTS: Solutions with 1.5 x109 and 6.0x109 CFU/mL were not lethal within 24 hours. Inoculums of 1.0x1010 CFU/mL were lethal in 80% and solutions with 2.0x1010 CFU/mL were lethal in 100% of animals. ESBL lethal sepsis (1.0x1010CFU/mL) was treated immediately with 50 mg/kg of meropenem every eight hours for 24 hours and presented 40% mortality compared with 80% mortality of the control group (p=0.033). Quantitative cultures of peritoneal fluid presented 104 CFU/mL or less for treated animals compared to more than 105 for untreated animals (p=0.001). CONCLUSION: Inoculums of 1.0x1010CFU/mL achieved the best results to study a model of lethal sepsis and this model of treatment of carbapenem-susceptible Enterobacteriaceae can serve as control to further evaluation of treatment of carbapenemase-producing Enterobacteriaceae models.
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spelling Experimental model for treatment of extended spectrum betalactamase producing-Klebsiella pneumoniaeKlebsiella pneumoniaeSepsisModels, animal BACKGROUND: Animal models are useful to evaluate the efficacy of antimicrobials in experimental sepsis. AIM: To elucidate the steps of producing an experimental model for the treatment of extended-spectrum beta-lactamase (ESBL)-producing Klebsiella pneumoniae sepsis METHODS: Several ESBL inoculums ranging from 1.5x109 colony-forming units per milliliter (CFU/mL) to 2.0x1010 CFU/mL were administered by peritoneal injection in adults Wistar rats. Outcomes and microbiological data of quantitative peritoneal and blood cultures were observed in untreated animals. Animals which received 2.0x1010 CFU/mL inoculums were treated with single meropenem dose (30mg/kg) after one hour and those which received 1.0x1010 CFU/mL inoculums were treated immediately with three doses of meropenem 50 mg/kg. Outcomes were observed for 24 hours after inoculation. RESULTS: Solutions with 1.5 x109 and 6.0x109 CFU/mL were not lethal within 24 hours. Inoculums of 1.0x1010 CFU/mL were lethal in 80% and solutions with 2.0x1010 CFU/mL were lethal in 100% of animals. ESBL lethal sepsis (1.0x1010CFU/mL) was treated immediately with 50 mg/kg of meropenem every eight hours for 24 hours and presented 40% mortality compared with 80% mortality of the control group (p=0.033). Quantitative cultures of peritoneal fluid presented 104 CFU/mL or less for treated animals compared to more than 105 for untreated animals (p=0.001). CONCLUSION: Inoculums of 1.0x1010CFU/mL achieved the best results to study a model of lethal sepsis and this model of treatment of carbapenem-susceptible Enterobacteriaceae can serve as control to further evaluation of treatment of carbapenemase-producing Enterobacteriaceae models. Colégio Brasileiro de Cirurgia Digestiva2014-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-67202014000300168ABCD. Arquivos Brasileiros de Cirurgia Digestiva (São Paulo) v.27 n.3 2014reponame:ABCD. Arquivos Brasileiros de Cirurgia Digestiva (São Paulo)instname:Colégio Brasileiro de Cirurgia Digestiva (CBCD)instacron:CBCD10.1590/S0102-67202014000300002info:eu-repo/semantics/openAccessTOLEDO,Paula Virginia MichelonTUON,Felipe FranciscoBAIL,LarissaMANENTE,FrancineARRUDA,PollianeARANHA-JUNIOR,Ayrton Alveseng2015-07-27T00:00:00Zoai:scielo:S0102-67202014000300168Revistahttp://abarriguda.org.br/revista/index.php/revistaabarrigudaarepb/indexONGhttps://old.scielo.br/oai/scielo-oai.php||revistaabcd@gmail.com2317-63262317-6326opendoar:2015-07-27T00:00ABCD. Arquivos Brasileiros de Cirurgia Digestiva (São Paulo) - Colégio Brasileiro de Cirurgia Digestiva (CBCD)false
dc.title.none.fl_str_mv Experimental model for treatment of extended spectrum betalactamase producing-Klebsiella pneumoniae
title Experimental model for treatment of extended spectrum betalactamase producing-Klebsiella pneumoniae
spellingShingle Experimental model for treatment of extended spectrum betalactamase producing-Klebsiella pneumoniae
TOLEDO,Paula Virginia Michelon
Klebsiella pneumoniae
Sepsis
Models, animal
title_short Experimental model for treatment of extended spectrum betalactamase producing-Klebsiella pneumoniae
title_full Experimental model for treatment of extended spectrum betalactamase producing-Klebsiella pneumoniae
title_fullStr Experimental model for treatment of extended spectrum betalactamase producing-Klebsiella pneumoniae
title_full_unstemmed Experimental model for treatment of extended spectrum betalactamase producing-Klebsiella pneumoniae
title_sort Experimental model for treatment of extended spectrum betalactamase producing-Klebsiella pneumoniae
author TOLEDO,Paula Virginia Michelon
author_facet TOLEDO,Paula Virginia Michelon
TUON,Felipe Francisco
BAIL,Larissa
MANENTE,Francine
ARRUDA,Polliane
ARANHA-JUNIOR,Ayrton Alves
author_role author
author2 TUON,Felipe Francisco
BAIL,Larissa
MANENTE,Francine
ARRUDA,Polliane
ARANHA-JUNIOR,Ayrton Alves
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv TOLEDO,Paula Virginia Michelon
TUON,Felipe Francisco
BAIL,Larissa
MANENTE,Francine
ARRUDA,Polliane
ARANHA-JUNIOR,Ayrton Alves
dc.subject.por.fl_str_mv Klebsiella pneumoniae
Sepsis
Models, animal
topic Klebsiella pneumoniae
Sepsis
Models, animal
description BACKGROUND: Animal models are useful to evaluate the efficacy of antimicrobials in experimental sepsis. AIM: To elucidate the steps of producing an experimental model for the treatment of extended-spectrum beta-lactamase (ESBL)-producing Klebsiella pneumoniae sepsis METHODS: Several ESBL inoculums ranging from 1.5x109 colony-forming units per milliliter (CFU/mL) to 2.0x1010 CFU/mL were administered by peritoneal injection in adults Wistar rats. Outcomes and microbiological data of quantitative peritoneal and blood cultures were observed in untreated animals. Animals which received 2.0x1010 CFU/mL inoculums were treated with single meropenem dose (30mg/kg) after one hour and those which received 1.0x1010 CFU/mL inoculums were treated immediately with three doses of meropenem 50 mg/kg. Outcomes were observed for 24 hours after inoculation. RESULTS: Solutions with 1.5 x109 and 6.0x109 CFU/mL were not lethal within 24 hours. Inoculums of 1.0x1010 CFU/mL were lethal in 80% and solutions with 2.0x1010 CFU/mL were lethal in 100% of animals. ESBL lethal sepsis (1.0x1010CFU/mL) was treated immediately with 50 mg/kg of meropenem every eight hours for 24 hours and presented 40% mortality compared with 80% mortality of the control group (p=0.033). Quantitative cultures of peritoneal fluid presented 104 CFU/mL or less for treated animals compared to more than 105 for untreated animals (p=0.001). CONCLUSION: Inoculums of 1.0x1010CFU/mL achieved the best results to study a model of lethal sepsis and this model of treatment of carbapenem-susceptible Enterobacteriaceae can serve as control to further evaluation of treatment of carbapenemase-producing Enterobacteriaceae models.
publishDate 2014
dc.date.none.fl_str_mv 2014-09-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-67202014000300168
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0102-67202014000300002
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Colégio Brasileiro de Cirurgia Digestiva
publisher.none.fl_str_mv Colégio Brasileiro de Cirurgia Digestiva
dc.source.none.fl_str_mv ABCD. Arquivos Brasileiros de Cirurgia Digestiva (São Paulo) v.27 n.3 2014
reponame:ABCD. Arquivos Brasileiros de Cirurgia Digestiva (São Paulo)
instname:Colégio Brasileiro de Cirurgia Digestiva (CBCD)
instacron:CBCD
instname_str Colégio Brasileiro de Cirurgia Digestiva (CBCD)
instacron_str CBCD
institution CBCD
reponame_str ABCD. Arquivos Brasileiros de Cirurgia Digestiva (São Paulo)
collection ABCD. Arquivos Brasileiros de Cirurgia Digestiva (São Paulo)
repository.name.fl_str_mv ABCD. Arquivos Brasileiros de Cirurgia Digestiva (São Paulo) - Colégio Brasileiro de Cirurgia Digestiva (CBCD)
repository.mail.fl_str_mv ||revistaabcd@gmail.com
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