The aetiological agents of the abdominal swelling affecting farmed larvae of gilt-head seabream, Sparus aurata L,, were studied. Four Vibrio strains were isolated from larvae of S. aurata affected by this disease, and all strains reproduced the disease in healthy larvae under controlled infection experiments, producing a significant increase of the mortality rates compared to the control (noninoculated larvae). Several enzymatic properties, which can act as .virulence factors, were demonstrated both in the extracellular products (ECPs) and in live cells of the strains tested, Histopathological examinations of the infected fish larvae revealed important changes of the anterior intestine and liver characterized by a marked hyperthrophy of the intestinal epithelium and hepatocytes, and by a separation of the mucosal and submucosal layers in the digestive tube. These histological alterations were associated with the constant presence of cocobacillar bacteria in the anterior intestine and in the liver. However, the precise pathogenic mechanisms of the strains tested have not been completely elucidated yet.

Brunner's gland hamartoma (BGH) is a rare benign tumour of the duodenum. We present a case of duodenal obstruction caused by a BGH, which required surgical resection after a failed attempt at endoscopic removal.

Social networks have surpassed their intermediary role and become gatekeepers of online content and traffic. This transformation has favored the spread of information disorders. The situation is especially alarming in Spain, where 57% of Spaniards have at some moment believed false news. Since 2016, First Draft has promoted several collaborative verification projects that brought together newsrooms to fact-check false, misleading and confusing claims circulating online during presidential elections in several countries. The main objective of this article is to study the collaboration forged between newsrooms in Spain in order to debunk disinformation contents in 2019 under the name of Comprobado (Verified) and the impact of this initiative. Applying a methodological approach based on non-participant observation, interviews, content analysis of reports, scientific articles, books and media archives, we examine the internal uses of this platform, how journalists verified public discourse, the strategies and internal agreements implemented, and the degree of participation of the 16 media involved. Results show that only half of the initiatives begun were transformed into published reports, and the media impact achieved was limited. Finally, we note that the principal reasons for the frustration of the project were its improvised implementation, due to the date of the election being brought forward, and the scant culture of collaboration in the sector. In Spain at least, cross-media alliances are still an exception.