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Prevalence of Helicobacter pylori resistance after failure of first-line therapy. A systematic review
Prevalencia de las resistencias de Helicobacter pylori tras el fracaso de una primera línea de tratamiento. Revisión sistemática
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Neus Muñoza,b,
Corresponding author
neus85@gmail.com

Corresponding author.
, Jordi Sánchez-Delgadob,c, Mireia Baylinaa,b, Sheila López-Góngoraa,b, Xavier Calvetb,c
a Departamento de Medicina Interna, Corporació Sanitària Universitària Parc Taulí, Sabadell, Barcelona, Spain
b Departamento de Medicina, Universitat Autònoma de Barcelona, Barcelona, Spain
c Departamento de Gastroenterología y Hepatología, Corporació Sanitària Universitària Parc Taulí, Sabadell, Barcelona, Spain
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Received 30 April 2018. Accepted 19 June 2018
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Table 1. Review articles. Methods for determining resistance.
Table 2. Articles included in the review. First-line treatments received and prevalence of secondary resistance.
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Abstract

There are no systematic data on the rates of antibiotic resistance after the failure of a first eradication treatment. The objective of this study was to determine the prevalence of secondary resistance to antibiotics by conducting a systematic review of studies evaluating the secondary resistance of Helicobacter pylori. We identified 31 studies (2787 patients). Resistance was determined in 1764 patients. A percentage of 99.1 of patients received clarithromycin as first-line treatment and 58.7% developed resistance. A percentage of 24.3 received metronidazole and 89.7% developed resistance. Secondary resistance to amoxicillin was extremely rare. Secondary resistance after first-line treatment was very common. These findings support the recommendation not to repeat clarithromycin or metronidazole after the failure of a first eradication treatment.

Keywords:
Helicobacter pylori
Second-line
Resistances
Resumen

No hay datos sistemáticos sobre cuáles son las tasas de resistencia a antibióticos tras el fracaso de un primer tratamiento erradicador. El objetivo del estudio es determinar la prevalencia de las resistencias secundarias a los antibióticos mediante una revisión sistemática de estudios que evaluaban las resistencias secundarias de Helicobacter pylori. Se identificaron 31 estudios (2.787 pacientes). Se determinaron resistencias en 1.764 pacientes. El 99,1% de los pacientes recibieron claritromicina como tratamiento de primera línea, y un 58,7% desarrollaron resistencias. El 24,3% de los pacientes recibieron metronidazol, desarrollando resistencias el 89,7%. La resistencia secundaria a amoxicilina fue excepcional. Las resistencias secundarias tras un primer tratamiento son muy elevadas. Estos hallazgos dan soporte a la recomendación de no repetir claritromicina o metronidazol tras el fracaso de un primer tratamiento erradicador.

Palabras clave:
Helicobacter pylori
Segunda línea
Resistencias

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