Modification of the rendering of the antibiogram at the Strasbourg University Hospital in November 2019 with the appearance of the concept of "standard dose" or "high dose" sensitivity.

This modification seems to have favored an inappropriate overprescription of Meropenem (the only antibiotic made "at standard dose") in Pseudomonas infections sensitive to other beta-lactams.

In June 2021, it was therefore decided to mask sensitivity to carbapenems by default in the rendering of Pseudomonas antibiograms when the strain was sensitive to a narrower spectrum beta-lactam ("restricted" antibiogram).

The aim of this study is to evaluate the impact of these changes in the antibiogram on antibiotic prescriptions.

Inclusion Criteria:

• Major subject (≥18 years old)
• Subject with a positive blood culture result for Pseudomonas spp identified in the microbiology laboratory of Strasbourg University Hospital during the period from June 1, 2018 to November 30, 2022
• Subject not opposing the reuse of their data for the purposes of this research.

Exclusion Criteria:

• Subject having expressed opposition to participating in the study,
• Pseudomonas spp strain resistant to all first-line beta-lactams (Piperacillin-Tazobactam, Ceftazidime, Céfepime and Aztreonam).
• Pseudomonas spp strain resistant to Meropenem.
• Lack of information on the antibiotic treatment undertaken.

Major subject (≥18 years old) with a positive blood culture result for Pseudomonas spp identified in the microbiology laboratory of Strasbourg University Hospital during the period from June 1, 2018 to November 30, 2022