Actividad in vitro de niveles séricos y urinarios de amoxicilina y amoxicilina-sulbactam sobre 820 cepas de Escherichia coli aisladas de infecciones urinarias bajas extrahospitalarias: Estudio sudamericano

We previously showed urinary activity against Escherichia coli both after oral amoxicillin-sulbactam and sulbactam alone. A study was performed in 10 laboratories from 8 countries to determine the etiology of community acquired lower urinary tract infections (CALUTI) in patients aged 3-to 7 years in...

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Autores principales:	Casellas,José María, Visser,Matías, Coco,Bárbara, Mac Dougall,Natalia, Cohen S.,Hugo, Soutric,Jorge, Arenoso,Héctor
Lenguaje:	Spanish / Castilian
Publicado:	Sociedad Chilena de Infectología 2003
Materias:	Urinary tract infections amoxicillin-sulbactam Latin America
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-10182003000100002
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spelling	oai:scielo:S0716-101820030001000022003-06-04Actividad in vitro de niveles séricos y urinarios de amoxicilina y amoxicilina-sulbactam sobre 820 cepas de Escherichia coli aisladas de infecciones urinarias bajas extrahospitalarias: Estudio sudamericanoCasellas,José MaríaVisser,MatíasCoco,BárbaraMac Dougall,NataliaCohen S.,HugoSoutric,JorgeArenoso,Héctor Urinary tract infections amoxicillin-sulbactam Latin America We previously showed urinary activity against Escherichia coli both after oral amoxicillin-sulbactam and sulbactam alone. A study was performed in 10 laboratories from 8 countries to determine the etiology of community acquired lower urinary tract infections (CALUTI) in patients aged 3-to 7 years in South America. Each laboratory sent data from 100 consecutive isolates including susceptibility to amoxicillin and amoxicillin-sulbactam by agar diffusion and also sent 20 consecutive E. coli isolates resistant (R) to amoxicillin-sulbactam to CEA reference laboratory, were MICs were determined for amoxicillin, amoxicillin-sulbactam (2/1) and sulbactam. Urines from 12 volunteers who received a single oral dose 500/500 mg amoxicillin-sulbactam were collected at 0-2; 2-4 and 4-6 h and urinary inhibitory titers (UIT) were determined against 5 R and 1 susceptible (S) isolates from each center. Levels of amoxicillin and sulbactam were determined. Results: Etiology: E. coli 820/1000 (82%) was prevalent; P. mirabilis and K. pneumoniae (4,3% each), S. saprophyticus 4,1% other 5,3%. Diffusion test: 59,4% E. coli were R to amoxicillin, 16,9 intermediate (I) and 23,7 S whereas results for amoxicillin-sulbactam were 28% R; 19,2 I and 52,8 S. MICs: 102 E. coli R to amoxicillin-sulbactam were studied; MIC90s (µg/ml) were the following: amoxicillin > 2.048; amoxicillin-sulbactam 256/128 and sulbactam alone 128. UITs: ranged from > 1/32 at 2 h dose; 1/16-1/4 h and 1/4-1/2 at 6 h against all the isolates. Antibacterial urine levels (µg/ml) obtained for amoxicillin and sulbactam respectively were at 2 h 1.414 and 1.904; at 4 h 691 and 1.257 and at 6 h 462 and 641. Our results confirm the prevalence of E. coli and explain discrepancies between resistance shown by agar diffusion test and clinical success observed in the treatment of CALUTI.info:eu-repo/semantics/openAccessSociedad Chilena de InfectologíaRevista chilena de infectología v.20 n.1 20032003-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-10182003000100002es10.4067/S0716-10182003000100002
institution	Scielo Chile
collection	Scielo Chile
language	Spanish / Castilian
topic	Urinary tract infections amoxicillin-sulbactam Latin America
spellingShingle	Urinary tract infections amoxicillin-sulbactam Latin America Casellas,José María Visser,Matías Coco,Bárbara Mac Dougall,Natalia Cohen S.,Hugo Soutric,Jorge Arenoso,Héctor Actividad in vitro de niveles séricos y urinarios de amoxicilina y amoxicilina-sulbactam sobre 820 cepas de Escherichia coli aisladas de infecciones urinarias bajas extrahospitalarias: Estudio sudamericano
description	We previously showed urinary activity against Escherichia coli both after oral amoxicillin-sulbactam and sulbactam alone. A study was performed in 10 laboratories from 8 countries to determine the etiology of community acquired lower urinary tract infections (CALUTI) in patients aged 3-to 7 years in South America. Each laboratory sent data from 100 consecutive isolates including susceptibility to amoxicillin and amoxicillin-sulbactam by agar diffusion and also sent 20 consecutive E. coli isolates resistant (R) to amoxicillin-sulbactam to CEA reference laboratory, were MICs were determined for amoxicillin, amoxicillin-sulbactam (2/1) and sulbactam. Urines from 12 volunteers who received a single oral dose 500/500 mg amoxicillin-sulbactam were collected at 0-2; 2-4 and 4-6 h and urinary inhibitory titers (UIT) were determined against 5 R and 1 susceptible (S) isolates from each center. Levels of amoxicillin and sulbactam were determined. Results: Etiology: E. coli 820/1000 (82%) was prevalent; P. mirabilis and K. pneumoniae (4,3% each), S. saprophyticus 4,1% other 5,3%. Diffusion test: 59,4% E. coli were R to amoxicillin, 16,9 intermediate (I) and 23,7 S whereas results for amoxicillin-sulbactam were 28% R; 19,2 I and 52,8 S. MICs: 102 E. coli R to amoxicillin-sulbactam were studied; MIC90s (µg/ml) were the following: amoxicillin > 2.048; amoxicillin-sulbactam 256/128 and sulbactam alone 128. UITs: ranged from > 1/32 at 2 h dose; 1/16-1/4 h and 1/4-1/2 at 6 h against all the isolates. Antibacterial urine levels (µg/ml) obtained for amoxicillin and sulbactam respectively were at 2 h 1.414 and 1.904; at 4 h 691 and 1.257 and at 6 h 462 and 641. Our results confirm the prevalence of E. coli and explain discrepancies between resistance shown by agar diffusion test and clinical success observed in the treatment of CALUTI.
author	Casellas,José María Visser,Matías Coco,Bárbara Mac Dougall,Natalia Cohen S.,Hugo Soutric,Jorge Arenoso,Héctor
author_facet	Casellas,José María Visser,Matías Coco,Bárbara Mac Dougall,Natalia Cohen S.,Hugo Soutric,Jorge Arenoso,Héctor
author_sort	Casellas,José María
title	Actividad in vitro de niveles séricos y urinarios de amoxicilina y amoxicilina-sulbactam sobre 820 cepas de Escherichia coli aisladas de infecciones urinarias bajas extrahospitalarias: Estudio sudamericano
title_short	Actividad in vitro de niveles séricos y urinarios de amoxicilina y amoxicilina-sulbactam sobre 820 cepas de Escherichia coli aisladas de infecciones urinarias bajas extrahospitalarias: Estudio sudamericano
title_full	Actividad in vitro de niveles séricos y urinarios de amoxicilina y amoxicilina-sulbactam sobre 820 cepas de Escherichia coli aisladas de infecciones urinarias bajas extrahospitalarias: Estudio sudamericano
title_fullStr	Actividad in vitro de niveles séricos y urinarios de amoxicilina y amoxicilina-sulbactam sobre 820 cepas de Escherichia coli aisladas de infecciones urinarias bajas extrahospitalarias: Estudio sudamericano
title_full_unstemmed	Actividad in vitro de niveles séricos y urinarios de amoxicilina y amoxicilina-sulbactam sobre 820 cepas de Escherichia coli aisladas de infecciones urinarias bajas extrahospitalarias: Estudio sudamericano
title_sort	actividad in vitro de niveles séricos y urinarios de amoxicilina y amoxicilina-sulbactam sobre 820 cepas de escherichia coli aisladas de infecciones urinarias bajas extrahospitalarias: estudio sudamericano
publisher	Sociedad Chilena de Infectología
publishDate	2003
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-10182003000100002
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Actividad in vitro de niveles séricos y urinarios de amoxicilina y amoxicilina-sulbactam sobre 820 cepas de Escherichia coli aisladas de infecciones urinarias bajas extrahospitalarias: Estudio sudamericano

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