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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

An Investigation of the Attractiveness and Feasibility of Introducing Temocillin to the Swedish or Scandinavian Market

Hultqvist, Lovisa, Jonsson, Cajsa, Kani, Sufyan, Regnell, Julia, Weiden, Lovisa January 2023 (has links)
Antibiotic resistance is a global health concern. Its increasing development is seemingly due to the irresponsible use of antibiotics and their availability. To ensure the correct treatment of patients and avoid unnecessary strain on the individual and society as a whole, it is vital to ensure access to both new and old antibiotics where there is a distinct need. Temocillin is an antibiotic used in the treatment of febrile UTIs. It is currently unavailable in Sweden, although being well-established and proven effective in other European countries. Hence, this report aims to investigate the introduction of temocillin to the Swedish or Scandinavian market in regards to the economic, technical, medical, and regulatory possibilities and barriers. The research is based on literature, internet, and database reviews and empirical data collection through interviews with people of expertise within the fields of antibiotic resistance and concerned aspects. This study emphasizes the great potential of introducing temocillin to Sweden. The evident conclusion drawn is that a production of the antibiotic is not possible in Sweden in the near future. Despite this, an identified supply chain in Europe can enable a role for Sweden as a distribution country. Through a performed break-even analysis, the calculated break-even point and profit margins indicated a low risk of financial loss for a MAH acting as the supplier of temocillin, such as the company Eumedica S.A.. Only 1 % of the Swedish market would have to be covered to break even, and regardless of the estimated volumes of usage upon introduction being either 50 % or 25 % of the total medical need, a profit is likely. In addition, temocillin holds a great medical and social value. However, the obvious obstacle observed is its out-dated documentation. The dossier is of the wrong format, which complicates the regulatory procedure. Thus, this needs to be taken into consideration for an introduction to be possible.
2

Evaluation expérimantale des concentrations critiques de la témocilline vis-à-vis de souches d'entérobactérales. / Experimental evaluation of tenocillin clinical breakpoints against enterobacterales

Alexandre, Kévin 20 September 2019 (has links)
Dans le monde entier l’antibiorésistance des entérobactérales communautaires, notamment par production de ß-lactamase à spectre étendu (E-BLSE), conduit à une consommation préoccupante d’antibiotique de dernier recours tels les carbapénèmes. Dérivé de la ticarcilline la témocilline pourrait représentée une alternative y compris sur certaines entérobactérales productrices de carbapénèmase (EPC). Néanmoins, il existe une incertitude concernant les concentrations critiques distinguant les entérobactérales sensibles des résistantes avec trois valeurs selon les pays utilisateurs de témocilline (8 mg/L, 16 mg/L ou 32 mg/L) tandis qu’une harmonisation internationale reste en attente. En ce contexte trois travaux originaux ont été poursuivi ainsi qu’une revue de la littérature. Il fut d’abord étudié in vitro la sensibilité à la témocilline de 762 entérobactérales responsables d’infection urinaire communautaire. Dans un contexte de prévalence faible des E-BLSE (5%) et nulle des EPC, les trois méthodes de routine (disque, automate, Etest) se sont révélées très fiables, la borne épidémiologique pour la témocilline s’établissant à 8 mg/L. Ensuite, l’efficacité de la témocilline vis-à-vis d’entérobactérales productrices ou non de ßlactamases (E-BLSE ou EPC) a été évaluée dans deux modèles murins complémentaires. Il a été montré l’efficacité de la témocilline à un schéma reproduisant la posologie humaine de 2 g toutes 12 h vis-à-vis d’entérobactérales pour lesquels la CMI de la témocilline était de 8 mg/L. L’efficacité de ce schéma posologique, bien que significative, était moindre vis-à-vis des isolats pour lesquels la CMI de la témocilline était de 16 mg/L. Par contre, il ne fut pas observé d’efficacité significative de la témocilline vis-à-vis des isolats avec une CMI à 32 mg/L quelques soit le schéma posologique (2 g toutes les 8 ou 12 h). L’ensemble de ces résultats, ainsi qu’une revue exhaustive des données de la littérature, conduisent à proposer une concentration critique de 8 mg/L pour le schéma posologique de 2 g toutes les 12 h, et de 16 mg/L pour celui de 2 g toutes les 8h. Cette dernière proposition correspondrait au « sensible à forte exposition », nouvelle définition de la catégorisation « intermédiaire » selon les dernières recommandations de l’EUCAST. / Worldwide spread of antimicrobial resistance among community-acquired enterobacterales, especially ESBL, leads to a worrying consumption of last resort antibiotics like carbapenem. Derivative of ticarcillin, temocillin may be an attractive carbapenem-sparing agent including against some carbapenemase-producing enterobacterales (CPE). Nevertheless, there is still uncertainty regarding clinical breakpoints with 3 different values depending on countries (8 mg/L, 16 mg/L, 32 mg/L), moreover international consensus about this issue is awaited. In this context, three original studies were conducted along with a literature review. First, in vitro susceptibility to temocillin of 762 enterobacterales from community-acquired urinary tract infection was studied. In this area of low prevalence of ESBL and no CPE, the three routine susceptibility methods (disk diffusion, automate, Etest) were very accurate, epidemiological cut-off was set to 8 mg/L. Then, temocillin efficacy against enterobacterales producing or not producing ß-lactamase (ESBL or CPE) was assessed by two complementary murine models. We demonstrated that temocillin exposure reproducing 2 g q12h regimen showed efficacy against strains with temocillin MIC of 8 mg/L. This regimen exhibited a lower, even though significant, efficacy against strain with temocillin MIC of 16 mg/L. On the over hand, it was not observed significant efficacy against strain with temocillin MIC of 32 mg/L whatever the regimen used (2 g q12h or q8h). All together this results and the literature review support a clinical breakpoints of 8 mg/L for2 g q12h regimen, and 16 mg/L for 2 g q8h regimen. This last proposition correspond to the new susceptibility category : “Intermediate – Susceptible, increase exposure” from the last EUCAST recommendations.

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