Microbiological characterization of severe exacerbations in Chronic Obstructive Pulmonary Disease (COPD) in patients admitted to the ICU with or without associated pneumonia: A retrospective cross-sectional study / Caracterización microbiológica de pacientes con enfermedad pulmonar obstructiva crónica (EPOC) ingresados a UCI con exacerbación grave o neumonía: un estudio transversal retrospective

Objective: The goal of this study was to compare the microbiology of severe exacerbations of chronic obstructive pulmonary disease (COPD) requiring admission to the intensive care unit (ICU), in patients with pneumonia compared to those that did not have. Methods: We conducted a retrospective cross-sectional study that included patients with severe COPD exacerbation. We took microbiologic and serologic samples to study the etiology of the exacerbation and chest X-ray to see whether or not it had associated pneumonia. Results: Ninety-one patients were included in the study. 53/91 (58%) had pneumonia. The most prevalent bacteria isolated were H. influenzae (25.3%), Moraxella spp (22%), H. parainfluenza (14.3%), Serratia marcescens (13.2%), mixed flora (9.9%) and methicillin-susceptible Staphylococcus aureus (9.9%). A statistically significant difference could not be demonstrated between the two groups. We detected 24.2% of bacterial resistance in both groups, the most frequent being AMPc (13 cases). Discussion: Bacterial pneumonia in COPD patients is higher in comparison with patients with acute exacerbation. Even though we did not find a significant difference in the microbiology of the groups with or without pneumonia, there are variables such as past smoking related to having pneumonia. Patients with pneumonia also had higher severity scores.

Objetivo: Comparar la microbiología de las exacerbaciones graves de EPOC (Enfermedad Pulmonar Obstructiva Crónica) que requieren ingreso a la unidad de cuidados intensivos, con y sin neumonía Métodos: se realizó un estudio transversal retrospectivo que incluyó pacientes con exacerbación grave de EPOC que requieren ingreso a la Unidad de Cuidados Intensivos (UCI). Tomamos muestras microbiológicas y serológicas para estudiar la etiología de la exacerbación y radiografía de tórax para ver si tenía o no una neumonía asociada. Seguimos a los pacientes durante su ingreso en la UCI y evaluamos el resultado de la hospitalización. Resultados: se incluyeron 91 pacientes en el estudio. 53/91 ( 58%) tuvieron confirmación de neumonía. Las bacterias más prevalentes aisladas fueron H. influenzae (25.3%), Moraxella spp (22%), H. parainfluenza (14.3%), Serratia marcescens (13.2%), flora mixta (9.9%) y S. aureus meticilino sensible. (9.9% ). No se pudo demostrar una diferencia estadísticamente significativa entre los dos grupos. Detectamos una resistencia bacteriana del 24,2% en ambos grupos, siendo la más frecuente AMPc (13 casos). Discusión: la neumonía bacteriana en pacientes con EPOC es más alta cuando se compara con pacientes con exacerbación aguda. Aunque no encontramos una diferencia significativa en la microbiología de los grupos con o sin neumonía, existen variables como antecedente de cigarrillo asociadas a tener neumonía. Los pacientes con neumonía así mismo tuvieron mayores índices de severidad.

Cardiovascular disease in rheumatoid arthritis: a systematic literature review in latin america.

Background. Cardiovascular disease (CVD) is the major predictor of poor prognosis in rheumatoid arthritis (RA) patients. There is an increasing interest to identify "nontraditional" risk factors for this condition. Latin Americans (LA) are considered as a minority subpopulation and ethnically different due to admixture characteristics. To date, there are no systematic reviews of the literature published in LA and the Caribbean about CVD in RA patients. Methods. The systematic literature review was done by two blinded reviewers who independently assessed studies for eligibility. The search was completed through PubMed, LILACS, SciELO, and Virtual Health Library scientific databases. Results. The search retrieved 10,083 potential studies. A total of 16 articles concerning cardiovascular risk factors and measurement of any cardiovascular outcome in LA were included. The prevalence of CVD in LA patients with RA was 35.3%. Non-traditional risk factors associated to CVD in this population were HLA-DRB1 shared epitope alleles, rheumatoid factor, markers of chronic inflammation, long duration of RA, steroids, familial autoimmunity, and thrombogenic factors. Conclusions. There is limited data about CVD and RA in LA. We propose to evaluate cardiovascular risk factors comprehensively in the Latin RA patient and to generate specific public health policies in order to diminish morbi-mortality rates.

Lupus nephritis: an overview of recent findings.

Lupus nephritis (LN) is one of the most serious complications of systemic lupus erythematosus (SLE) since it is the major predictor of poor prognosis. In susceptible individuals suffering of SLE, in situ formation and deposit of immune complexes (ICs) from apoptotic bodies occur in the kidneys as a result of an amplified epitope immunological response. IC glomerular deposits generate release of proinflammatory cytokines and cell adhesion molecules causing inflammation. This leads to monocytes and polymorphonuclear cells chemotaxis. Subsequent release of proteases generates endothelial injury and mesangial proliferation. Presence of ICs promotes adaptive immune response and causes dendritic cells to release type I interferon. This induces maturation and activation of infiltrating T cells, and amplification of Th2, Th1 and Th17 lymphocytes. Each of them, amplify B cells and activates macrophages to release more proinflammatory molecules, generating effector cells that cannot be modulated promoting kidney epithelial proliferation and fibrosis. Herein immunopathological findings of LN are reviewed.

Lupus nephritis in Colombians: contrasts and comparisons with other populations.

Lupus nephritis (LN) is one of the most serious complications of systemic lupus erythematosus (SLE) since it is the major predictor of poor prognosis. The purpose of this study was to examine the clinical and immunological characteristics associated with LN development during the course of SLE in Colombians. Therefore, patients with SLE followed at five different referral centers in Medellin, Bogota, and Cali were included in this cross-sectional and multicenter study. Factors influencing LN were assessed by conditional logistic regression analysis, adjusting by gender, age at onset, duration of disease, and city of origin. The entire sample population included 467 patients, of whom 51% presented with LN. The presence of anti-dsDNA antibodies (adjusted odds ratio (AOR), 2.06; 95% confidence interval (CI), 1.16-3.65), pleuritis (AOR, 3.82; 95% CI, 1.38-10.54), and hypertension (AOR, 2.63; 95% CI, 1.23-5.62) were positively associated with LN, whereas the presence of anti-La antibodies was a protective factor against LN development (AOR, 0.4; 95% CI, 0.19-0.85). A review of literature on LN in different populations is made. The identified clinical- and laboratory-associated factors would assist earlier diagnosis and guide decisions on therapeutic interventions on this critical and frequent complication of SLE.