SARS-CoV-2 is a member of the family of coronaviruses associated with severe outbreaks of respiratory diseases in recent decades and is the causative agent of the COVID-19 pandemic. The recognition by and activation of the innate immune response recruits neutrophils, which, through their different mechanisms of action, form extracellular neutrophil traps, playing a role in infection control and trapping viral, bacterial, and fungal etiological agents. However, in patients with COVID-19, activation at the vascular level, combined with other cells and inflammatory mediators, leads to thrombotic events and disseminated intravascular coagulation, thus leading to a series of clinical manifestations in cerebrovascular, cardiac, pulmonary, and kidney disease while promoting severe disease and mortality. Previous studies of hospitalized patients with COVID-19 have shown that elevated levels of markers specific for NETs, such as free DNA, MPO, and H3Cit, are strongly associated with the total neutrophil count; with acute phase reactants that include CRP, D-dimer, lactate dehydrogenase, and interleukin secretion; and with an increased risk of severe COVID-19. This study analyzed the interactions between NETs and the activation pathways involved in immunothrombotic processes in patients with COVID-19.

Introduction: The impact of the coronavirus disease 2019 (COVID-19) pandemic has globally challenged health services, especially because when the pandemic first reached Mexico, in February 2020, there was no known effective and safe treatment. A treatment scheme was offered by the Institute for the Integral Development of Health (IDISA) in Mexico City from March 2020 to August 2021 when there were many patients with COVID-19. This report summarizes the experience managing COVID-19 with this scheme. Materials and Methods: This is a descriptive, retrolective study. The data was obtained from the case files of the patients who attended the IDISA from March 2020 to August 2021 with COVID-19. All the cases were treated with the scheme consisting of nitazoxanide, azithromycin, and prednisone. Various laboratory blood tests and chest computerized tomography scan were done. When indicated, supplementary oxygen, and another specific treatment were used. A standardized clinical recording was conducted for 20 days based on symptoms and systemic symptoms. Results: Based on the World Health Organization criteria, the patients were classified according to the disease severity: 170 mild, 70 moderate, and 312 severe cases. The outcome was the discharge of 533 patients after their recovery, 16 were excluded from the study, and 6 died. Conclusions: The use of nitazoxanide, azithromycin, and prednisone proved to be effective as it resulted in improvement of symptoms and in successful outcomes for the management of COVID-19 outpatients.

The clinical evaluation of the patient with COVID-19 allows better care, application of safety criteria and preventive measures. The disease progresses from mild to severe and critical. In this work, is evaluated in patients with COVID-19 clinical format to identify moderate to severe stages of the disease. Following a cohort of male and female patients over 18 years of age admitted to the Infectology Service of the General Hospital of Mexico. Each patient is studied using the "COVID-19 Infectology" clinical format and in the first 24 hours of admission, a real-time RT-PCR molecular test is performed for SARS-CoV-2 infection. 65 patients classified as severe COVID-19 were studied, the RT-PCR was positive in 60 patients and negative in 5, clinical data did not differ from the positive ones and the 5 negative were considered false negative cases of the molecular test. There were no differences between positives and negatives with Fisher's test, and no difference in age, comorbidities, or prognostic evaluation with Student's t test. The conclusion is that the clinical format "COVID-19 Infectology" allows to recognize the cases and identify those that are in a severe evolution.