Aim. To study death risk factors in patients with community-acquired pneumonia in municipal hospitals in Samara. Methods. 75 cases of deaths of patients hospitalized because of community-acquired pneumonia were studied (study group), 300 convalescent patients with community-acquired pneumonia discharged from the hospital were included in the control group. The retrospective comparative «case control» study was performed. Results. Mean age of the patients who died was 47.4±2.2 years; men were more prevalent (70.6%), time since admission date till death was 6.5±2.5 days, more than a third (36.0%) died before 24 hours after admission. The study group contained significantly higher number of unemployed (72.0%) and intravenous drugs users (16.0%). HIV infection was found in 37.3% of the patients who died, compared to 19.6% prevalence in control group. Multifactorial logistic regression of clinical signs revealed the following death risk factors in patients with community-acquired pneumonia: infiltrates on X-ray involving more than one lung lobe, arterial hypotension (systolic blood pressure ≤100 mm Hg, diastolic blood pressure ≤60 mm Hg), tachypnea (breath rate over 25 per minute). Conclusion. Factors having the highest positive prognostic value for a lethal outcome at patients with community-acquired pneumonia are: late admission, multilobar pneumonia; arterial hypotension; tachypnea; HIV infection, social unemployment and male gender.
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Aim. To evaluate the sensitivity to tuberculin in patients with infiltrative pulmonary tuberculosis in combination with an infection, caused by the human immunodeficiency virus (HIV), using various different tests. Methods. Examined were patients with infiltrative pulmonary tuberculosis with HIV infection (134 patients, the main group) and without HIV infection (100 patients, control group). Tuberculin diagnostics included an intradermal Mantoux test with 2 tuberculin units, the skin prick test with a 100% solution of PPD-L and the intradermal test «Diaskintest». Results. In the main group, a positive reaction to the Mantoux test with 2 tuberculin units was reported significantly less frequently (56.0%) than in the comparison group (89.0%), the diagnostic value of the test decreased with a decrease in the number of CD4+ lymphocytes. The prick test was characterized by a complete correlation with the results of the Mantoux test, although having a number of advantages. The sensitivity of the «Diaskintest» in the main group was 48.3%, and in the control group - 84.6%, at the same time the sensitivity of the «Diaskintest» decreased to 17% in cases of pronounced immunodeficiency. Conclusion. The skin prick test can be used as a screening method for early detection of tuberculosis in HIV-infected individuals with CD4+ lymphocyte count of 300 cells in 1 ml or more with the aim of forming risk groups, followed by screening for tuberculosis.
In the context of a pandemic caused by the SARS-CoV-2 virus, for a patient with respiratory symptoms and bilateral lung damage, COVID-19 becomes the first disease in the differential diagnostic search. Pneumonia in COVID-19 shares many characteristics with Pneumocystis pneumonia. One of the possible markers of the severe course of COVID-19 is hepcidin, a peptide hormone that negatively regulates iron metabolism. There are no data on the value of hepcidin in Pneumocystis pneumonia in the published scientific literature. The purpose of this study is to conduct a comparative analysis of hepcidin in the blood serum of patients with pneumonia in COVID-19 and Pneumocystis pneumonia to clarify their pathogenetic features. A case-control observational study was conducted, including 68 patients with pneumonia in COVID-19 and 44 patients with HIV infection and Pneumocystis pneumonia (PCP/HIV). Determination of hepcidin was carried out by ELISA using the ELISA Kit for Hepcidin. Statistical data processing was carried out using the MedCalc 19.2.6 software. Results. Comparative analysis of serum hepcidin levels in the study groups showed that hepcidin is statistically significantly higher in PCP/HIV than in COVID-19 - the median value is 22 times higher (p <0.0001). When examining the ROC curve for hepcidin, it was found that this biomarker has a high diagnostic potential and indicates a higher probability of COVID-19 than PCP/HIV at values ≤768.044 pg / ml. In the context of the COVID-19 pandemic, it is necessary to remember about other diseases that manifest themselves with a similar clinical and radiological picture. COVID-19 and PCP/HIV share many similarities; the peptide hormone hepcidin has shown itself as a potential differential diagnostic marker between them, and therefore the need for further studies of hepcidin is justified, taking into account the severity of the course of COVID-19, the presence of comorbidities and in a comparative aspect with pathologies that «mimic» under COVID-19.
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