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1.
BMC Biol ; 21(1): 147, 2023 06 26.
Artigo em Inglês | MEDLINE | ID: mdl-37365558

RESUMO

BACKGROUND: Mesophotic coral communities are increasingly gaining attention for the unique biological diversity they host, exemplified by the numerous mesophotic fish species that continue to be discovered. In contrast, many of the photosynthetic scleractinian corals observed at mesophotic depths are assumed to be depth-generalists, with very few species characterised as mesophotic-specialists. This presumed lack of a specialised community remains largely untested, as phylogenetic studies on corals have rarely included mesophotic samples and have long suffered from resolution issues associated with traditional sequence markers. RESULTS: Here, we used reduced-representation genome sequencing to conduct a phylogenomic assessment of the two dominant mesophotic genera of plating corals in the Indo-Pacific and Western Atlantic, respectively, Leptoseris and Agaricia. While these genome-wide phylogenies broadly corroborated the morphological taxonomy, they also exposed deep divergences within the two genera and undescribed diversity across the current taxonomic species. Five of the eight focal species consisted of at least two sympatric and genetically distinct lineages, which were consistently detected across different methods. CONCLUSIONS: The repeated observation of genetically divergent lineages associated with mesophotic depths highlights that there may be many more mesophotic-specialist coral species than currently acknowledged and that an urgent assessment of this largely unstudied biological diversity is warranted.


Assuntos
Antozoários , Recifes de Corais , Animais , Filogenia , Ecossistema , Antozoários/genética , Biodiversidade
2.
J Hosp Infect ; 135: 67-73, 2023 May.
Artigo em Inglês | MEDLINE | ID: mdl-36918069

RESUMO

BACKGROUND: Peripheral venous catheter (PVC) complications occur on average in approximately half of patients, necessitating premature PVC removal, suspending administration of ongoing therapies, and catheter replacement. AIM: To estimate the current incidence, complications, and costs of bloodstream infection (BSI) attributable to PVCs. METHODS: Patients with PVC-related BSI (cases) were matched with patients without PVC-related BSI (controls). FINDINGS: From January 1st, 2018 to March 31st, 2020, a total of 9833 out of 113,068 patients visiting the emergency department (9%) were hospitalized in a medical ward after insertion of a PVC. Among them, 581 (6%) had at least one positive blood culture. Twenty-five (4%) of these were judged as having a PVC-related BSI. Major complications were noted in nine patients. One patient presented severe sepsis requiring admission to intensive care unit for eleven days followed by thoracic (T4-T7) spondylodiscitis requiring prolonged antimicrobial therapy. Another patient developed mitral valve endocarditis also requiring prolonged antimicrobial therapy. One patient developed a pre-sacral abscess three months after initial PVC infection and required hospital readmission for 19 days for drainage. Median (interquartile range) hospital stay costs were €11,597 (8,479-23,759) for cases and €6,789 (4,019-10,764) for controls, leading to median additional costs of €5,587. CONCLUSION: Though the risk of developing PVC-related BSI in patients admitted to medical wards may seem low, complications of PVC-related BSI are severe, and associated mortality remains high. The financial resources used to treat these complications could be better spent on prevention, including the use of high-quality materials and technologies, and improved training of healthcare providers.


Assuntos
Bacteriemia , Infecções Relacionadas a Cateter , Sepse , Humanos , Estudos Retrospectivos , Incidência , Bacteriemia/epidemiologia , Catéteres , Infecções Relacionadas a Cateter/epidemiologia
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