RT Journal Article T1 Bartonella Endocarditis in Spain: Case Reports of 21 Cases A1 García Álvarez, Lara A1 García García, María Concepción A1 Muñoz García, Patricia Carmen A1 Fariñas Álvarez, María del Carmen A1 Cuadra, Manuel Gutiérrez A1 Fernández Hidalgo, Nuria A1 García Vázquez, Elisa A1 Moral Escudero, Encarnación A1 Alonso Socas, María del Mar A1 García Rosado, Dácil A1 Hidalgo Tenorio, Carmen A1 Domínguez, Fernando A1 Goikoetxea Agirre, Josune A1 Gainzarain, Juan Carlos A1 Rodríguez Esteban, María Ángeles A1 Bosch Guerra, Xerach A1 Oteo, José A. AB Blood culture negative endocarditis (BCNE) is frequent in infective endocarditis (IE). One of the causes of BCNE is fastidious microorganisms, such as Bartonella spp. The aim of this study was to describe the epidemiologic, clinical characteristics, management and outcomes of patients with Bartonella IE from the “Spanish Collaboration on Endocarditis-Grupo de Apoyo al Manejo de la Endocarditis infecciosa en España (GAMES)”cohort. Here we presented 21 cases of Bartonella IE. This represents 0.3% of a total of 5590 cases and 2% of the BCNE from the GAMES cohort. 62% were due to Bartonella henselae and 38% to Bartonella quintana. Cardiac failure was the main presenting form (61.5% in B. hensalae, 87.5% in B. quintana IE) and the aortic valve was affected in 85% of the cases (76% in B. henselae, 100% in B. quintana IE). Typical signs such as fever were recorded in less than 40% of patients. Echocardiography showed vegetations in 92% and 100% of the patients with B. henselae and B. quintana, respectively. Culture was positive only in one patient and the remaining were diagnosed by serology and PCR. PCR was the most useful tool allowing for diagnosis in 16 patients (100% of the studied valves). Serology, at titers recommended by guidelines, only coincided with PCR in 52.4%. Antimicrobial therapy, in different combinations, was used in all cases. Surgery was performed in 76% of the patients. No in-hospital mortality was observed. One-year mortality was 9.4%. This article remarks the importance for investigating the presence of Bartonella infection as causative agent in all BCNE since the diagnosis needs specific microbiological tools and patients could benefit of a specific treatment. PB MPDI SN 2076-0817 YR 2022 FD 2022-05-10 LK https://hdl.handle.net/20.500.14352/72525 UL https://hdl.handle.net/20.500.14352/72525 LA eng NO García Álvarez, L., García Gracía, M. C., Muñoz García, P. et al. «Bartonella Endocarditis in Spain: Case Reports of 21 Cases». Pathogens, vol. 11, n.o 5, mayo de 2022, p. 561. DOI.org (Crossref), https://doi.org/10.3390/pathogens11050561. DS Docta Complutense RD 11 abr 2025