Aim. In this study we evaluated the effects of Riamilovir on SARS-CoV-2 viral shedding and on admission duration in patients with moderate COVID-19. Materials and methods. We have used data from 69 health records of patients with moderate severe PCR confirmed SARS-CoV-2 infection. Control group included 34 patients treated with off-label riamilovir 1250 mg per day for 5 days (250 mg 5 times a day), comparison groups 35 patients, who received ribavirin and umifenovir 800 mg a day for 5 days. The antiviral therapy was administered within 72 hours from the onset of the disease. The primary endpoints were elimination of virus in oropharyngeal and nasopharyngeal swabs on 7 day of admission and discharge from the hospital by 14 day. Results. Patients assigned to riamilovir had significantly shorter time to clinical improvement as well as increased PCR negative rate by day 7. Conclusion. Yearly administration of riamilovir as opposed to the umifenovir and ribavirin in therapy of moderate SARS-CoV-2 infection was associated with significant shorter time to clinical improvement by 14 day of hospitalization. PCR negative rate by 7 days of hospitalization is significantly more likely in riamilovir group.

BACKGROUND: COVID-19 is an international emergency. The Military Medical Academy, including the Department and Clinic of Infectious Diseases (with a course in medical parasitology and tropical diseases) are actively involved in the fight against the COVID-19 pandemic, and are also studying the pathogenesis, diagnosis and treatment of this disease. AIM: to systematize the work done at the Military Medical Academy in relation to the fight against a new coronavirus infection. MATERIALS AND METHODS: This article provides a brief description of the studies conducted in relation to COVID-19. RESULTS: The departments view of the infection caused by SARS-CoV-2 is presented, the main indicators of the work of the clinic of infectious diseases in the fight against COVID-19 are briefly reflected, and their own research in the field of this infectious disease is demonstrated. CONCLUSION: Based on our scientific work, our experience in treating patients with a new coronavirus infection, the main conclusions and recommendations are formulated: It is necessary to take into account the clinical feature of COVID-19 a long initial period (up to 8 days), which creates the illusion of imaginary well-being and contributes to late hospitalization. PCR is not an ideal diagnostic method, which creates the possibility of obtaining a false negative result. In this regard, clinical, epidemiological and radiological diagnostics are decisive. The organization of early active detection of patients with all clinical forms of infection caused by SARS-CoV-2, and their timely hospitalization helps to reduce the risk of developing a severe course, complications and epidemiological danger of patients. Complex antiviral and anticoagulant therapy should be early (up to 5 days from the clinical manifestation), proactive, aimed at reducing the likelihood of developing pneumonia with respiratory failure and thrombosis of the LA branches. Anti-inflammatory therapy increases the survival of patients with severe COVID-19 and should be administered as early as possible with a preventive goal at the first minimal clinical and laboratory signs of a hyperinflammatory response.

Aim. To evaluate the clinical efficacy and safety of antiviral drug riamilovir in patients with acute respiratory viral infections (ARVI) of non-coronavirus (SARS-CoV-2) etiology with different dosing regimens. Materials and methods. The study included 150 patients with ARVI aged 18–27 years (50 patients received riamilovir in the regimen of 250 mg 3 times a day for 5 days, 50 patients received riamilovir in the off label regimen of 250 mg 5 times a day for 5 days, 50 patients received only pathogenetic treatment). Results. The use of riamilovir in both treatment regimens led to a reduction in the duration of inpatient treatment. The shortest periods of hospitalization were noted in patients who received the study drug at higher daily dosages. The use of riamilovir reduced the duration and severity of general infectious manifestations of the disease, while the shortest total duration of fever and a number of respiratory tract syndromes was registered among people who received riamilovir in the regimen of 1250 mg per day for 5 days, no adverse events were registered, additionally, 100% elimination of ARVI pathogens was noted in 1250 mg per day group. Conclusion. Riamilovir has shown clinical efficacy and a good safety profile in in both treatment regimens. The dosage regimen of 1250 mg per day led to more significant clinical effects and to 100% elimination of ARVI pathogens in the study group by the 6th day of hospitalization.

Clinical characteristics and pathomorphological manifestations in 69 patients aged 18 to 86 years with a fatal outcome of the disease were examined in order to analyze the causes of severe course and high mortality of generalized forms meningococcal infection. It was found that the main clinical form was meningococcemia (90%), in the majority in combination with meningitis (52%). The fulminant course in 77% of patients with meningococcal sepsis manifested itself as a sudden onset, rapid development of typical symptoms. Hemorrhagic exanthema was detected on the first day of meningococcemia. The leading complications and critical conditions were infectious-toxic shock, disseminated intravascular coagulation and acute adrenal insufficiency (WaterhouseFriederiksen syndrome). The severe course of meningitis (in 10%) led to the development of cerebral coma, the morphological substrate of which was edema swelling of the brain.

Aim. To study the efficacy and safety of Riamilovir in patients diagnosed with acute respiratory viral infection using several dosage regimens of the drug.Material and Methods. The clinical efficacy and safety of Riamilovir were evaluated based on the results of a study, that included 150 patients in three comparative groups, 50 patients each. The research groups received etiotropic antiviral therapy with 1 capsule (250 mg) of Riamilovir 3 times per day for 5 days in the first group; in the second group, patients received Riamilovir off-label — 1 capsule (250 mg) 5 times per day for 5 days; and the third group included 50 patients who received only pathogenetic treatment.Results. As a result of the study, Riamilovir demonstrated a high safety profile regardless of the dosage regimen; no adverse events were registered. It was shown that Riamilovir use, regardless of the dosage regimen, led to a statistically significant reduction in the duration of inpatient treatment. It should be noted that the shortest periods of hospitalization were observed in patients who received the studied drug at increased daily dosages. Riamilovir was found to reduce the duration and severity of general infectious signs of the disease, while complete elimination of ARVI pathogens occurred by the 6th day of hospitalization; the shortest total duration of fever and a number of respiratory tract syndromes was registered among patients receiving Riamilovir at a daily dose of 1250 mg for 5 days.Conclusion. The etiotropic antiviral drug Riamilovir has shown clinical efficacy when used in both treatment regimens in patients with acute respiratory viral infections, as well as a good safety profile.

Monoclonal antibodies IL-6 inhibitors (olokizumab) and IL-6 receptor inhibitors (tocylisumab, levilimab) are most widely used for proactive anti-inflammatory therapy in patients with COVID-19. A decrease in blood oxygen saturation after 12–72 hours of anticytokine therapy has been recently observed in some patients treated with MAB. Unfortunately, little attention is paid to this problem. As a rule, the deterioration of the patient’s condition is attributed to the natural course of the disease. The purpose of the study is to identify predictors of reduced blood oxygen saturation against the administration of IL-6 inhibitors and its receptors in patients with new coronavirus infection (COVID-19). Material and methods. The study included 54 patients with COVID-19 who were treated permanently between 2020 and 2021 and were given IL-6 inhibitors or receptors (tocilizumab, olokizumab or levililmab). The results of clinical examination, laboratory and instrumental research were evaluated. Results and conclusions. Clinical-laboratory parameters reliably correlated with decreased blood oxygen saturation against the administration of IL-6 inhibitors and its receptors are as follows: administration of MAB after 2 days of inpatient treatment (OR = 3.52; 95% CI 1.026–12.073; p = 0.04), the presence of hypertonic disease in combination with ischemic heart disease or obesity (OR = 4.0; 95% CI 1.0–16.925; p = 0.049 and OR = 7.353; 95% CI 1.429–37.848; p = 0.009 respectively), increase in the number of monocytes greater than 0.6 × 109/l (OR = 4.929; 95% CI 1.327–18.307; p = 0.014), the decrease of albumin less than 35.1 g/l (OR = 30.0; 95% CI 1.410–638.186; p = 0.033), glucose of venous blood 5.9 mmol/l and above (OR = 11.556; 95% CI 1.223–109.19; p = 0.018). Based on the data obtained in this study, it is recommended to evaluate the predictors listed above before conducting targeted anti-inflammatory therapy, and, if they are available, to dynamically monitor patients for reduced blood oxygen saturation.