Background: The Araucania region in Chile had the greatest COVID-19 incidence and lethality in Chile Aim: To describe the clinical characteristics and evolution of patients admitted for COVID-19 in a high complexity Hospital in the region of La Araucanía-Chile. Material and Methods: Review of medical records of the first 169 patients aged 55 ± 17 years (50% women) admitted for COVID-19 between march and may, 2020 at a regional hospital in Temuco Chile. Results: The most common comorbidities of these patients were hypertension, diabetes, and obesity. The symptom triad of cough, dyspnea and fever was present in 85%. Less frequent symptoms were diarrhea and vomiting. Biomarkers at admission such as ferritin, D-dimer, among others, were significantly higher among patients who required admission to the Intensive Care Unit. The presence of cough, dyspnea and fever were significantly associated with longer hospitalization time and requirement for mechanical ventilation. Hypertension and obesity were significantly associated with longer hospitalization stay. Eight percent of patients died. Conclusions: Symptoms such as cough, dyspnea and fever and specific biomarkers on admission were associated with a worse evolution of adult inpatients with COVID-19.

ABSTRACT Enterobacteria-producing extended-spectrum β-lactamases (ESBL) play an important role in healthcare infections, increasing hospitalization time, morbidity and mortality rates. Among several ESBLs that emerge from these pathogens, CTX-M-type enzymes had the most successful global spread in different epidemiological settings. Latin America presents high prevalence of CTX-M-2 in ESBL-producing enterobacterial infections with local emergence of the CTX-M-1 group. However, this high prevalence of the CTX-M-1 group has not yet been reported in Chile. The aim of this study was to identify ESBLs among enterobacteria isolated from clinical samples of critically ill patients from southern Chile. One-hundred thirty seven ESBL-producing bacteria were isolated from outpatients from all critical patient units from Hernán Henríquez Aravena Hospital. Phenotype characterization was performed by antibiogram, screening of ESBL, and determination of minimum inhibitory concentration (MIC). PCR was used for genetic confirmation of resistance. Molecular typing was performed by ERIC-PCR. ESBL-producing isolates were identified as Klebsiella pneumoniae (n = 115), Escherichia coli (n = 18), Proteus mirabilis (n = 3), and Enterobacter cloacae (n = 1), presenting multidrug resistance profiles. PCR amplification showed that the strains were positive for blaSHV (n = 111/81%), blaCTX-M-1 (n = 116/84.7%), blaTEM (n = 100/73%), blaCTX-M-2 (n = 28/20.4%), blaCTX-M-9 (0.7%), blaPER-1 (0.7%), and blaGES-10 (0.7%). The multiple production of ESBL was observed in 93% of isolates, suggesting high genetic mobility independent of the clonal relationship. The high frequency of the CTX-M-1 group and a high rate of ESBL co-production are changing the epidemiology of the ESBL profile in Chilean intensive care units. This epidemiology is a constant and increasing challenge, not only in Chile, but worldwide.

The case of a male patient under hemodialytic therapy, who developed right heart failure is presented. Echocardiography revealed pericardial effusion, constrictive pattem in the right cavities, septation, without valvular damage and preserved systolic and diastolic function. Pericardial drainage and extensive pericardiectomy was performed obtaining cultures of pericardial tissue positive for an HACEK group organism, Cardiobacterium hominis, with repeatedly negative blood cultures. This is a rare clinical presentation of isolated bacterial pericarditis by an atypical microorganism, without associated endocarditis. The infection mechanisms are presented and the scarce available scientific literature is discussed in this study.

Se presenta el caso de un paciente de sexo masculino, de 35 años de edad, en hemodiálisis, que desarrolló un cuadro progresivo de insuficiencia cardíaca de predominio derecho. Una ecocardiografía reveló derrame pericárdico con patrón constrictivo en el llenado de cavidades derechas, tabicación, ausencia de daño valvular y buena función sistólica y diastólica del ventrículo izquierdo. Se realizó un drenaje pericárdico con pericardiectomía amplia, aislándose en el cultivo de líquido y tejido pericárdico un microorganismo del grupo HACEK, Cardiobacterium hominis, con hemocultivos reiteradamente negativos. Es un caso infrecuente de pericarditis bacteriana por una bacteria atípica, sin endocarditis. Se postulan los mecanismos de infección y se discute la escasa literatura científica disponible.