Objective To investigate the value of serum long noncoding RNA small nucleolar RNA host gene 7(lncRNA SNHG7)and microRNA(miR)-34a-5p expression in the diagnosis and prognostic evaluation of bloodstream infection(BSI).Methods A total of 193 suspected BSI patients admitted to the emergency department of Guangxi Wuzhou Red Cross Hospital from March 2022 to March 2023 were collected as the study subjects.After diagnosis,BSI patients were included as the infection group(n=100),and non BSI patients were included as the non infection group(n=93).After 28 days of treatment,BSI patients were separated into a death group(n=32)and a survival group(n=68)based on their prognosis.The real time fluorgenic quantitative PCR(qRT-PCR)method was applied to detect the expression levels of serum lncRNA SNHG7 and miR-34a-5p.The Target Scan Human website was applied to predict the targeting relationship between miR-34a-5p and lncRNA SNHG7.Pearson method was applied to analyze the correlation between serum lncRNA SNHG7 level and miR-34a-5p level.Multivariate Logistic regression was applied to analyze the influencing factors of prognosis in patients with BSI.Receiver operating characteristic(ROC)curve was applied to analyze the prognostic value of serum lncRNA SNHG7 and miR-34a-5p.Results The serum lncRNA SNHG7 level(1.47±0.35)in the infection group was obviously higher than that in the non infection group(1.03±0.15),and the miR-34a-5p level(0.85±0.21)was obviously lower than that in the non infection group(1.02±0.13),and the differences were statistically significant(t=11.203,6.703,all P<0.05).Compared with survival group,the serum lncRNA SNHG(1.68±0.21 vs 1.37±0.19),C-reactive protein(CRP)(85.74±9.16mg/L vs 63.18±7.68mg/L),procalcitonin(PCT)levels(56.37±8.72ng/ml vs 34.69±5.54ng/ml),albumin(92.51±10.18g/L vs 65.27±7.24g/L),Acute Physiological and Chronic Health Evaluation(APACHE II)scores(28.15±5.12scores vs 16.35±4.31scores)of the death group were obviously higher,and serum miR-34a-5p level(0.67±0.14 vs 0.93±0.16)was obviously lower,the differences were statistically significant.(t=7.357～15.340,all P<0.05).LncRNA SNHG7 had a targeted binding site with miR-34a-5p,and lncRNA SNHG7 was negatively correlated with miR-34a-5p(r=-0.568,P<0.05).Serum lncRNA SNHG7 and miR-34a-5p were prognostic factors for BSI patients(all P<0.05).The area under the curve(AUC)of serum lncRNA SNHG7,miR-34a-5p,and their combined evaluation of prognosis in BSI patients was better than that of serum lncRNA SNHG7 and miR-34a-5p detected sepatately(Z=0.001,2.304,all P<0.05),with sensitivity and specificity of 78.12%and 97.06%,respectively.Conclusion The serum lncRNA SNHG7 level in BSI patients is obviously elevated,while the serum miR-34a-5p level is obviously reduced.The two are closely related to the prognosis of BSI patients,and the combination of the two has good evaluation value for the prognosis of BSI patients.

Objective To investigate the value of serum long noncoding RNA small nucleolar RNA host gene 7(lncRNA SNHG7)and microRNA(miR)-34a-5p expression in the diagnosis and prognostic evaluation of bloodstream infection(BSI).Methods A total of 193 suspected BSI patients admitted to the emergency department of Guangxi Wuzhou Red Cross Hospital from March 2022 to March 2023 were collected as the study subjects.After diagnosis,BSI patients were included as the infection group(n=100),and non BSI patients were included as the non infection group(n=93).After 28 days of treatment,BSI patients were separated into a death group(n=32)and a survival group(n=68)based on their prognosis.The real time fluorgenic quantitative PCR(qRT-PCR)method was applied to detect the expression levels of serum lncRNA SNHG7 and miR-34a-5p.The Target Scan Human website was applied to predict the targeting relationship between miR-34a-5p and lncRNA SNHG7.Pearson method was applied to analyze the correlation between serum lncRNA SNHG7 level and miR-34a-5p level.Multivariate Logistic regression was applied to analyze the influencing factors of prognosis in patients with BSI.Receiver operating characteristic(ROC)curve was applied to analyze the prognostic value of serum lncRNA SNHG7 and miR-34a-5p.Results The serum lncRNA SNHG7 level(1.47±0.35)in the infection group was obviously higher than that in the non infection group(1.03±0.15),and the miR-34a-5p level(0.85±0.21)was obviously lower than that in the non infection group(1.02±0.13),and the differences were statistically significant(t=11.203,6.703,all P<0.05).Compared with survival group,the serum lncRNA SNHG(1.68±0.21 vs 1.37±0.19),C-reactive protein(CRP)(85.74±9.16mg/L vs 63.18±7.68mg/L),procalcitonin(PCT)levels(56.37±8.72ng/ml vs 34.69±5.54ng/ml),albumin(92.51±10.18g/L vs 65.27±7.24g/L),Acute Physiological and Chronic Health Evaluation(APACHE II)scores(28.15±5.12scores vs 16.35±4.31scores)of the death group were obviously higher,and serum miR-34a-5p level(0.67±0.14 vs 0.93±0.16)was obviously lower,the differences were statistically significant.(t=7.357～15.340,all P<0.05).LncRNA SNHG7 had a targeted binding site with miR-34a-5p,and lncRNA SNHG7 was negatively correlated with miR-34a-5p(r=-0.568,P<0.05).Serum lncRNA SNHG7 and miR-34a-5p were prognostic factors for BSI patients(all P<0.05).The area under the curve(AUC)of serum lncRNA SNHG7,miR-34a-5p,and their combined evaluation of prognosis in BSI patients was better than that of serum lncRNA SNHG7 and miR-34a-5p detected sepatately(Z=0.001,2.304,all P<0.05),with sensitivity and specificity of 78.12%and 97.06%,respectively.Conclusion The serum lncRNA SNHG7 level in BSI patients is obviously elevated,while the serum miR-34a-5p level is obviously reduced.The two are closely related to the prognosis of BSI patients,and the combination of the two has good evaluation value for the prognosis of BSI patients.