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Mixed Strain H. Pylori Infection in Patients Who Have Problems With Eradication of H. Pylori

16. juli 2010 oppdatert av: University Medical Centre Ljubljana

Multi Locus Sequence Typing (MLST) Used as Tool to Confirm Ability of Susceptible Helicobacter Pylori Strains to Gain Resistance to Clarithromycin During Eradication Therapy Independently of Mixed Strain Helicobacter Pylori Infection

The purpose of this study is to determine whether mixed H. pylori strain infection is the reason for eradication failure during treatment of H. pylori infection. The investigators present the results got from extensive sampling of biopsy samples taken from individuals diagnosed with H. pylori connected disease. The investigators were looking for individuals that were not able to eradicate H. pylori although they had susceptibility testing tailored antibiotic therapy. On their control visit after 2 months they presented again with H. pylori although at their first visit they had H. pylori isolated from biopsy sample sensitive to all antibiotics prescribed. Multi Locus Sequence Typing (MLST) was used to prove the sequence type of H. pylori and E test was used to determine susceptibility of H. pylori to antibiotics.

Studieoversikt

Status

Fullført

Forhold

Intervensjon / Behandling

Studietype

Observasjonsmessig

Registrering (Faktiske)

10

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiesteder

  • Slovenia
      • Ljubljana, Slovenia, 1000
        • Institute of microbiology and immunology

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

18 år til 65 år (Voksen, Eldre voksen)

Tar imot friske frivillige

Nei

Kjønn som er kvalifisert for studier

Alle

Prøvetakingsmetode

Ikke-sannsynlighetsprøve

Studiepopulasjon

The investigators invited people who were not able to eradicate H. pylori although at their first visit they had H. pylori sensitive to all antibiotics tested. At first visit all patients had stomach biopsy sample taken and H. pylori isolated and therapy prescribed. If they did not eradicate bacteria after 2 months they were again invited to control visit to define the problem and appropriate therapy prescribed. They were again invitation to control visit at the end of June 2010 to see the outcome of therapy.

Beskrivelse

Inclusion Criteria:

  • People who have H. pylori sensitive to all antibiotics before therapy and and do not eradicate H. pylori after appropriate antibiotic therapy.

Exclusion Criteria:

  • People who did not eradicate H. pylori because of primary resistance to antibiotics.

Studieplan

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

Kohorter og intervensjoner

Gruppe / Kohort
Intervensjon / Behandling
H. pylori eradication failure
People who are not able to eradicate H. pylori although the appropriate antibiotic therapy taken.
Legemiddel: Antibiotics to which H. pylori can not develope resistance
Amoxicillin, metronidazole and tetracyclin as primary drugs to treat H. pylori infection in duration of 10 days.

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Sequence type of H.pylori determined with MLST as a good evidence that people are infected with only one strain of H. pylori
Tidsramme: Six months after first visit the strains from before/after therapy will be inspected with MLST to see if people have mixed strain infection.
The investigators assume that people that are not able to eradicate infection with H. pylori although they have never been treated for such infection and they have taken appropriate therapy, have such problems because H. pylori is capable to escape from immune response. The investigators will define if patients have the same H. pylori sequence type through longer period and that such H. pylori is capable to develope resistance to clarithromycin very quickly.Such patients can eliminate H. pylori if we check the infection status more often and give them more suitable antibiotic therapy.
Six months after first visit the strains from before/after therapy will be inspected with MLST to see if people have mixed strain infection.
Sequence type of H.pylori determined with MLST as a good evidence that people are infected with only one strain of H. pylori
Tidsramme: 9 months after first visit to see if people still have H. pylori due to insufficient immune response.
The investigators assume that people that are not able to eradicate infection with H. pylori although they have never been treated for such infection and they have taken appropriate therapy, have such problems because H. pylori is capable to escape from immune response. The investigators will define if patients have the same H. pylori sequence type through longer period and that such H. pylori is capable to develope resistance to clarithromycin very quickly.Such patients can eliminate H. pylori if we check the infection status more often and give them more suitable antibiotic therapy.
9 months after first visit to see if people still have H. pylori due to insufficient immune response.

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Sponsor

University Medical Centre Ljubljana

Samarbeidspartnere

Institute of microbiology and immunology, Slovenia

Etterforskere

  • Studieleder: Alojz Ihan, MD. PhD, Institute of mircobiology and immunology, Slovenia

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart

1. november 2008

Primær fullføring (Faktiske)

1. desember 2009

Studiet fullført (Faktiske)

1. juli 2010

Datoer for studieregistrering

Først innsendt

13. juli 2010

Først innsendt som oppfylte QC-kriteriene

16. juli 2010

Først lagt ut (Anslag)

19. juli 2010

Oppdateringer av studieposter

Sist oppdatering lagt ut (Anslag)

19. juli 2010

Siste oppdatering sendt inn som oppfylte QC-kriteriene

16. juli 2010

Sist bekreftet

1. juli 2010

Mer informasjon

Begreper knyttet til denne studien

Ytterligere relevante MeSH-vilkår

Andre studie-ID-numre

  • IMI2010-2

Denne informasjonen ble hentet direkte fra nettstedet clinicaltrials.gov uten noen endringer. Hvis du har noen forespørsler om å endre, fjerne eller oppdatere studiedetaljene dine, vennligst kontakt register@clinicaltrials.gov. Så snart en endring er implementert på clinicaltrials.gov, vil denne også bli oppdatert automatisk på nettstedet vårt. .

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