Distribution and virulence of Escherichia coli harboring cyclomodulins and supplementary virulence genes isolates from clinical and environmental samples.

This study aimed to determine the prevalence of cyclomodulins (cdt, cnf, pks and cif) in Escherichia coli (E. coli) isolated from clinical and environmental samples, the presence of supplementary virulence genes (SVG), antibiotic resistance, and in vitro cytotoxicity. 413 E. coli were isolated from clinical (stool from obese subjects, normal weight subjects, children with diarrhea, and children without diarrhea; and urine from pregnant and non-pregnant women with urinary tract infections) and environmental (water and different foods) samples. PCR was performed to identify E. coli pathotypes, the four cyclomodulins, and 18 SVG; virulence score, cytotoxic assay, and antibiotic resistance assay were performed. Fifteen percent of E. coli were positive for cyclomodulins and were found in all isolation sources; however, in children with diarrhea, they were more frequent. The most frequent cyclomodulin was cdt. More DEC strains harbor cyclomodulins than non-DEC, and cyclomodulins were most frequent among aEPEC pathotype. SVG ehaC was associated with cyclomodulin-positive strains. Cyclomodulin-positive E. coli had a higher virulence score but no significant cytotoxic activity. They were slightly more resistant to antibiotics. In conclusion, cyclomodulins-positive E. coli was widely distributed in humans, food, and the environment, and they were associated with SVG ehaC, suggesting that these genes may play a role in the pathogenesis of the cyclomodulins. However, more research is needed.

Clinical Characteristics of Hospitalized Patients With COVID-19 and Their Association With the Progression to Critical Illness and Death: A Single-Center Retrospective Study From Northwestern Mexico.

OBJECTIVE: The objective of this study was to associate the epidemiological and clinical characteristics of patients hospitalized for COVID-19 with the progression to critical illness and death in northwestern Mexico. METHODS: From March to October 2020, we collected the demographic and clinical characteristics of 464 hospitalized patients from northwestern Mexico. RESULTS: Sixty-four percent (295/464) of the patients became critically ill. Age, occupation, steroid and antibiotic use at previous hospitalization, and underlying diseases (hypertension, obesity, and chronic kidney disease) were associated with critical illness or death (p: < 0.05). No symptoms were associated with critical illness. However, the parameters such as the heart rate, respiratory rate, oxygen saturation, and diastolic pressure and the laboratory parameters such as the glucose, creatinine, white line cells, hemoglobin, D-dimer, and C-reactive protein, among others, were associated with critical illness (p: < 0.05). Finally, advanced age, previous hospital treatment, and the presence of one or more underlying diseases were associated with critical illness and death (p: < 0.02). CONCLUSIONS: Several epidemiological (e.g., age and occupation) and clinical factors (e.g., previous treatment, underlying diseases, and vital signs and laboratory parameters) were associated with critical illness and death in patients hospitalized with COVID-19. These data provide us with possible markers to avoid critical illness or death from COVID-19 in our region.

Predictores de fenómeno de no reflujo en infarto agudo del miocardio con elevación del segmento ST / Predictors in no-reflow phenomenon in acute myocardial infarction with ST-segment elevation

Resumen Antecedentes: El fenómeno de «no reflujo¼ (NR) es una de las complicaciones más temidas tras una intervención coronaria percutánea (ICP) en el tratamiento del infarto de miocardio con elevación del segmento ST (IAMCEST) por su elevada morbimortalidad. Objetivo: Describir los factores predictores para el fenómeno de NR en un grupo de sujetos con IAMCEST tratados con ICP. Método: Se estudiaron 103 casos de IAMCEST a los que se les realizó una ICP. Los sujetos se dividieron de acuerdo con la presencia del fenómeno de NR. Se estudió mediante un análisis multivariante la edad, el sexo, presencia de comorbilidades, el peso y otros parámetros clínicos y de laboratorio como predictores del fenómeno de NR. Resultados: En este estudio, el análisis con regresión logística identificó como factores independientes para el desarrollo de fenómeno de NR el flujo TIMI basal ≤ 2 (razón de momios [OR]6.03; intervalo de confianza del 95% [IC 95%]: 0.9-11.8; p = 0.04), estadio enfermedad renal según KDIGO (Kidney Disease Improving Global Outcomes) ≥ 3 (OR 3.49; IC 95%: 1.2-2.6; p = 0.02) y nivel de glucosa ≥ 180 mg/dl(OR 2.61; IC 95%: 1.0-2.4; p = 0.04). Conclusiones: El fenómeno de NR sigue siendo un reto para la morbimortalidad a corto y a largo plazo en el IAMCEST. Los factores identificados pueden ser utilizados para la estratificación de los casos con IAMCEST y riesgo de fenómeno de NR previo a la ICP.

Abstract Background: No-reflow (NR) phenomenon is one of the most feared complications after percutaneous coronary intervention (PCI) in the treatment of ST-segment elevation myocardial infarction (STEMI) due to its high morbidity and mortality. Objective: To describe the predictive factors for NR phenomenon in a group of subjects with STEMI treated with PCI. Method: One hundred and three cases of STEMI who underwent PCI. The subjects were divided according to the presence of NR phenomenon. In a multivariate analysis age, gender, comorbidities, weight, and other clinical and laboratory parameters were studied as predictors of NR phenomenon were studied. Results: In this study, logistic regression analysis identified as independent factors for the development of NR phenomenon baseline TIMI flow ≤ 2 (OR 6.03; 95% CI, 0.9 to 11.8; p = 0.04), ER KDIGO ≥ 3 (OR OR 2.61; 95% CI, 1.0 to 2.4; p = 0.04). Conclusions: NR phenomenon continues to be a challenge for short and long-term morbidity and mortality in STEMI. The identified factors can be used for the stratification of cases with STEMI and risk of NR phenomenon prior to PCI.

Impacto de la mastoidectomía en la reparación de la perforación timpánica en pacientes con otitis media crónica no colesteatomatosa con hueso mastoideo esclerótico / Impact of mastoidectomy in the repair of tympanic perforation in patients with chronic non-cholesteatomatous otitis media with sclerotic mastoid bone

Objetivo: describir las características clínicas y resultados obtenidos en pacientes a los cuales se les realizó reparación de perforación timpánica secundaria a otitis media crónica no colesteatomatosa con hueso mastoideo esclerótico, con y sin mastoidectomía. Materiales y métodos: estudio de tipo trasversal comparativo, con un muestreo no probabilístico por serie consecutiva de casos. Se revisaron los expedientes de pacientes que cumplan con los criterios de inclusión en el periodo comprendido enero del 2015 a mayo 2016. Se tomarón datos como; edad, sexo, estado de procedencia,a la otoscopia, presencia de otorrea transoperatoria y postoperatoria, estado de la mucosa, presencia de timpanoesclerosis o miringoesclerosis, perforación o retracción del injerto. Resultados: un total de 48 pacientes fueron seleccionados; 31 del sexo femenino y 17 del sexo masculino, con edad promedio de 43,25 años, el seguimiento fue de 3 meses. Al comparar al grupo de paciente con mastoidectomía y sin esta, no se encontró diferencia estadísticamente significativa en cuanto a éxito de la cirugía (perforación de injerto RR 1,2, p 1, otorrea posoperatoria RR 2,26, p 0;68 y retracción del injerto RR 0;76, p 1). Se encontró que las características durante y previa a la cirugía no influyeron en el resultado final, presentando un promedio global del 94% de integración del injerto. Conclusión: la mastoidectomía no muestra beneficio adicional en la reparación de la membrana timpánica, las características durante y previa a la cirugía no influyeron en el resultado final..(AU)

Objective: to describe the clinical characteristics and results obtained in patients who underwent repair of tympanic perforation secondary to chronic non-cholesteatomatous otitis media with sclerotic mastoid bone, with and without mastoidectomy. Material and methods: comparative cross-sectional study, with a non-probabilistic sampling by consecutive series of cases. We reviewed the files of patients who meet the inclusion criteria in the period from January 2015 to May 2016. Data was collected such as; age, sex, state of origin, history of smoking, cause of perforation, duration of dry ear, data to otoscopy, presence of transoperative and postoperative otorrhea, state of the mucosa, presence of tympanosclerosis or miringoesclerosis, perforation or retraction of the graft. Results: a total of 48 patients were selected; 31 of the female sex and 17 of the male sex, with an average age of 43.25 years, the follow-up was 3 months. When comparing the group of patients with and without mastoidectomy, no statistically significant difference was found in the success of the surgery (graft perforation RR 1.2, p 1, postoperative otorrhea RR 2.26, p 0.68 and graft retraction RR 0.76, p 1). We found that the characteristics during and before surgery did not influence the final result, presenting an overall average of 94% of graft integration. Conclusions: the mastoidectomy shows no additional benefit in tympanic membrane repair, the characteristics during and prior to surgery did not influence the final result..(AU)

Utilidad de la biopsia de ganglio linfático en el niño / Utility of lymph nodes biopsy in children

Se analiza la utilidad de la biopsia de ganglio linfático como procedimento diagnóstico en pacientes de edad pediátrica, que fueron atendidos en nuestro hospital. Fueron revisados 122 expedientes clínicos e histológicos de niños a quienes se les practicó biopsia ganglionar extracavitaria en el Hospital Infantil del Estado de Sonora, durante el periodo comprendido de enero de 1978 a diciembre de 1986. Ochenta y un pacientes eran del sexo masculino (66.4%), y cuarenta y uno del femenino (33.6%). Los grupos de edades variaron de cuatro meses a 17 años, predominando el grupo comprendido entre uno a 9 años de edad; el lapso de evolución fue menor de seis meses en la mayoría de los casos. El procedmiento quirúrgico se practicó en más de la mitad de los pacientes, en el trasncursos de las primeras cuatro semanas después de la detección del crecimiento ganglionar. La localización de la adenomegalia predominó en región cervical y, respecto al diagnóstico de admisión, la mayoría ingresó con el de "adenopatía en estudio". El diagnóstico histopatológico estableció hiperplasia linforreticular inespecífica (HLI) en el 58.1% de los casos, seguido de neoplasias e infecciones. En seis pacientes con diagnóstico inicial de HLI, se llegó al específico en segunda biopsia y en otros 10, mediante diversos estudios paraclínicos. Como resultado de esta revisión se hacen algunas recomendaciones para el mejor estudio de los niños con adenomegalia