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Basilea Pharmaceutica Ltd, Allschwil (SIX: BSLN), a commercial-stage biopharmaceutical company committed to meeting the needs of patients with severe bacterial and fungal infections, announced today that scientific presentations with new data on its antibiotic ceftobiprole (Zevtera®) have been presented at ESCMID Global 2024, the annual meeting of the European Society of Clinical Microbiology and Infectious Diseases, which took place from April 27 to 30, 2024 in Barcelona, Spain. Dr. Marc Engelhardt, Chief Medical Officer of Basilea, stated: “The data presented at ESCMID Global 2024 provide further evidence for the differentiated profile of ceftobiprole in the treatment of severe bacterial bloodstream infections, including those involving methicillin-resistant Staphylococcus aureus, MRSA, and pulmonary infections.” Ceftobiprole was recently approved by the US Food and Drug Administration (FDA), supported by data from three phase 3 studies: ERADICATE, conducted in patients with Staphylococcus aureus bacteremia (SAB), TARGET, in acute bacterial skin and skin structure infections (ABSSSI), and a study in community-acquired bacterial pneumonia (CABP).1, 2, 3 Additional data from the ERADICATE phase 3 study were presented in three posters, comparing ceftobiprole to daptomycin in the treatment of complicated Staphylococcus aureus bacteremia. One poster focused on subgroup analyses in patients with renal impairment, demonstrating consistent efficacy and safety of ceftobiprole in this specific patient group, which included patients with chronic dialysis, representing 13% of patients in the ERADICATE study. Furthermore, baseline characteristics of patients in the ERADICATE study were presented, underlining the complexity of the infections in the studied patient population, with about 30% of patients presenting with more than one underlying infectious condition, foci, or complications at baseline, including soft tissue infections, dialysis, abdominal and thoracic abscesses, osteoarticular infections and right-sided endocarditis. Data presented on a third poster demonstrated that bloodstream clearance was achieved at a median of four days after the start of treatment in both the ceftobiprole and comparator groups. In the group treated with ceftobiprole, fewer patients had Staphylococcus aureus-positive blood cultures after ten days compared to the comparator treatment group. An oral presentation focused on a re-analysis of the previously conducted ceftobiprole phase 3 study in patients with community-acquired bacterial pneumonia (CABP). The study compared ceftobiprole with ceftriaxone ± linezolid and was performed prior to the availability of the current FDA guidance for the development of drugs for the treatment of CABP (FDA-CABP-2020). Using the FDA-CABP-2020 primary endpoint of early clinical success at day 3 after study start, this re-analysis supported the non-inferiority of ceftobiprole to ceftriaxone ± linezolid. Basilea’s phase 3 program for ceftobiprole is funded in part with federal funds from the US Department of Health and Human Services (HHS); Administration for Strategic Preparedness and Response (ASPR); Biomedical Advanced Research and Development Authority (BARDA), under contract number HHSO100201600002C. Through this partnership, Basilea has been awarded approximately USD 112 million, or approximately 75 percent of the costs related to the SAB and ABSSSI phase 3 studies, regulatory activities and non-clinical work. Ceftobiprole, the active moiety of the prodrug ceftobiprole medocaril, is an advanced generation cephalosporin antibiotic for intravenous administration, with rapid bactericidal activity against a wide range of Gram-positive bacteria, such as Staphylococcus aureus, including methicillin-resistant strains (MRSA), and Gram-negative bacteria.4 In several countries in Europe and beyond, the brand is currently approved and marketed as Zevtera® and Mabelio® for the treatment of adult patients with hospital-acquired bacterial pneumonia (HABP), excluding ventilator-associated bacterial pneumonia (VABP), and for the treatment of community-acquired bacterial pneumonia (CABP). Basilea has entered into license and distribution agreements covering more than 80 countries. In the United States, ZEVTERA® is indicated for the treatment of adult patients with Staphylococcus aureus bloodstream infections (bacteremia) (SAB), including right-sided infective endocarditis, and adult patients with acute bacterial skin and skin structure infections (ABSSSI) and for adult and pediatric patients (3 months to less than 18 years old) with community-acquired bacterial pneumonia (CABP). Warnings and precautions Increased Mortality with Unapproved use in Ventilator-Associated Bacterial Pneumonia (VABP) Patients: The safety and effectiveness of ZEVTERA for the treatment of VABP has not been established and the use of ZEVTERA for VABP is not approved. Hypersensitivity Reactions: Discontinue ZEVTERA if a hypersensitivity reaction occurs, and institute appropriate treatment. Seizures and other adverse central nervous system (CNS) reactions have been associated with the use of ZEVTERA. If seizures or other CNS adverse reactions occur, evaluate patients to determine whether ZEVTERA should be discontinued. Clostridioides difficile-associated diarrhea (CDAD) has been reported with nearly all systemic antibacterial agents, including ZEVTERA. Evaluate if diarrhea occurs. Staphylococcus aureus bacteremia (SAB) is a serious bloodstream infection associated with significant morbidity and mortality.5 Complications include concomitant infections such as bone, joint or heart valve infections, persistent bacteremia or bacteremia in patients on dialysis. With a 30-day all-cause mortality of around 20%, there is a high medical need for improved therapies for SAB.6 Acute bacterial skin and skin structure infections (ABSSSI) are common infections in the healthcare setting. Staphylococcus aureus is the most common pathogen associated with these infections, which can be difficult to treat if methicillin-resistant Staphylococcus aureus (MRSA) is involved.7 Community-acquired bacterial pneumonia (CABP) is a leading cause of morbidity and mortality worldwide. It is the leading cause of infectious disease-related death in the US.8 Basilea is a commercial-stage biopharmaceutical company founded in 2000 and headquartered in Switzerland. We are committed to discovering, developing and commercializing innovative drugs to meet the needs of patients with severe bacterial and fungal infections. We have successfully launched two hospital brands, Cresemba for the treatment of invasive fungal infections and Zevtera for the treatment of bacterial infections. In addition, we have preclinical and clinical anti-infective assets in our portfolio. Basilea is listed on the SIX Swiss Exchange (SIX: BSLN). Please visit basilea.com. References ERADICATE study (SAB): ClinicalTrials.gov identifier NCT03138733 T. L. Holland, S. E. Cosgrove, S. B. Doernberg et al. Ceftobiprole for treatment of complicated Staphylococcus aureus bacteremia. New England Journal of Medicine 2023 (389), 1390-1401; DOI: 10.1056/NEJMoa2300220 TARGET study (ABSSSI): ClinicalTrials.gov identifier NCT03137173 J. S. Overcash, C. Kim, R. Keech et al. Ceftobiprole compared with vancomycin plus aztreonam in the treatment of acute bacterial skin and skin structure infections: Results of a phase 3, randomized, double-blind trial (TARGET). Clinical Infectious Diseases 2021 (73), e1507-e1517 CABP study: ClinicalTrials.gov identifier NCT00326287 S. C. Nicholson, T. Welte, T. M. File Jr. et al. A randomised, double-blind trial comparing ceftobiprole medocaril with ceftriaxone with or without linezolid for the treatment of patients with community-acquired pneumonia requiring hospitalization. International Journal of Antimicrobial Agents 2012 (39), 240-246 Summary of Product Characteristics (SmPC) Zevtera: https://www.medicines.org.uk/emc/product/9164/smpc [Accessed: May 02, 2024] A. P. Kourtis, K. Hatfield, J. Baggs et al. Vital signs: Epidemiology and recent trends in methicillin-resistant and in methicillin-susceptible Staphylococcus aureus bloodstream infections – United States. Morbidity and Mortality Weekly Report 2019 (68), 214-219 K. Hamed, M. Engelhardt, M. E. Jones et al. Ceftobiprole versus daptomycin in Staphylococcus aureus bacteremia: a novel protocol for a double-blind, Phase III trial. Future Microbiology 2020 (1), 35-48 J. Edelsberg, C. Taneja, M. Zervos et al. Trends in US hospital admissions for skin and soft tissue infections. Emerging Infectious Diseases 2009 (15), 1516-1518 J. A. Ramirez, T. L. Wiemken, P. Peyrani et al. Adults hospitalized with pneumonia in the United States: Incidence, epidemiology, and mortality. Clinical Infectious Diseases 2017 (65), 1807-1812 The content above comes from the network. if any infringement, please contact us to modify.

Allschwil, Switzerland, April 24, 2024 Basilea Pharmaceutica Ltd, Allschwil (SIX: BSLN), a commercial-stage biopharmaceutical company committed to meeting the needs of patients with severe bacterial and fungal infections, reported that shareholders approved all proposals of the board of directors at today’s annual general meeting (AGM) for the financial year 2023. At the AGM, the shareholders approved the annual report, the financial statements and the consolidated financial statements for the financial year 2023. They also endorsed carrying forward the accumulated deficit and approved the discharge of the members of the board of directors and the management committee. Mr. Domenico Scala was re-elected as chairman and Mr. Leonard Kruimer, Dr. Martin Nicklasson, Dr. Nicole Onetto, Dr. Carole Sable and Dr. Thomas Werner were re-elected as members of the board of directors. In addition, Dr. Nicklasson, Dr. Onetto and Dr. Werner were re-elected to the compensation committee. The term of all board members lasts until the AGM 2025. The shareholders also approved the proposed maximum aggregate amount of compensation for the board of directors for the period from the AGM 2024 to the AGM 2025, and the maximum aggregate amount of total compensation (fixed and variable) for the management committee for the financial year 2025. In a non-binding advisory vote, the shareholders endorsed the compensation report for the financial year 2023. Finally, the shareholders re-elected Dr. Caroline Cron as independent proxy until the end of the next AGM and re-elected PricewaterhouseCoopers Ltd, Basel, as auditors for the financial year 2024. At the AGM, 35.9% of the share capital, equivalent to 59.7% of the shares entitled to vote, was represented. In total, 69.9% of the share capital is currently registered in Basilea’s share register. About Basilea Basilea is a commercial-stage biopharmaceutical company founded in 2000 and headquartered in Switzerland. We are committed to discovering, developing and commercializing innovative drugs to meet the needs of patients with severe bacterial and fungal infections. We have successfully launched two hospital brands, Cresemba for the treatment of invasive fungal infections and Zevtera for the treatment of bacterial infections. In addition, we have preclinical and clinical anti-infective assets in our portfolio. Basilea is listed on the SIX Swiss Exchange (SIX: BSLN). Please visit basilea.com. Disclaimer This communication expressly or implicitly contains certain forward-looking statements, such as "believe", "assume", "expect", "forecast", "project", "may", "could", "might", "will" or similar expressions concerning Basilea Pharmaceutica Ltd, Allschwil and its business, including with respect to the progress, timing and completion of research, development and clinical studies for product candidates. Such statements involve certain known and unknown risks, uncertainties and other factors, which could cause the actual results, financial condition, performance or achievements of Basilea Pharmaceutica Ltd, Allschwil to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements. Basilea Pharmaceutica Ltd, Allschwil is providing this communication as of this date and does not undertake to update any forward-looking statements contained herein as a result of new information, future events or otherwise. For further information, please contact: Peer Nils Schröder, PhDHead of Corporate Communications & Investor RelationsBasilea Pharmaceutica International Ltd, Allschwil Hegenheimermattweg 167b4123 AllschwilSwitzerlandPhone+41 61 606 1102E-mailmedia_relations@basilea.cominvestor_relations@basilea.com This press release can be downloaded from www.basilea.com. Press release (PDF)