Objective To understand the epidemiological characteristics and clinical features of Zika virus disease,and to improve its prophylaxis and treatment.Methods The first case with imported Zika virus disease in China was retrospectively reported and analyzed.The literature of Zika virus infection in human was reviewed.Results This patient was the first case with imported Zika virus disease in China who presented with typical clinical characteristics and had clear epidemiological history.All the contacts were test negative for Zika virus nucleic acid.Literature retrieval showed evidence of Zika virus propagation in more than 40 countries in Africa,Asia,and Americas.The majority of patients presented with mild symptoms and the main prevention measures included mosquito control and improved awareness of personal protection.Conclusions Human infected with Zika virus often shows recessive infection.Only a small part develop disease and have generally good prognosis with supportive treatment.

Objective To investigate the incidence and risk factors of acute kidney injury (AKI)in hepatitis B virus (HBV)related acute-on-chronic liver failure (ACLF)patients,and to explore the impact of AKI on the prognosis of ACLF.Methods The medical records of 227 patients who were diagnosed with HBV-related ACLF at the Department of Infectious Diseases in the First Affiliated Hospital of Nanchang University from January 2015 to August 2016 were retrospectively reviewed.Patients were divided into AKI group and non-AKI group based on the AKI criteria published by International Club of Ascites in 2015 .Demographic and clinical data were compared between groups.The AKI incidence and its impact on patients’prognosis were analyzed.The comparison of continuous variables was done by t test or rank-sum test.The comparison of categorical variables was done byχ2 test or Fisher exact test.AKI risk factors were analyzed by using logistic regression.Results There were 66 (29.1 %)cases were diagnosed with AKI among 227 ACLF patients,among which,45 patients (68.2%)were stage Ⅰ,14 (21 .2%) were stage Ⅱ and 7 (10.6%)were stage Ⅲ.Age,cirrhosis,concentrations of total bilirubin and albumin,international normalized ratio (INR),percentage of neutrophils,MELD scores and spontaneous peritonitis rate (SBP)were all statistically different between AKI group and non-AKI group (all P <0.05).The binary logistic regression analysis revealed that only INR (OR=3.132,P =0.001 )and SBP (OR=4.204,P =0.001 )were the independent risk factors of AKI.The optimal cut-off value for INR was 2.025 with AUROC of 0.609 (P =0.01),sensitivity of 59.1 % and specificity of 62.1 %.The 30-day mortality of AKI group was significantly higher than non-AKI group (χ2= 18.324,P < 0.01). Conclusions AKI is relatively common in patients with ACLF.The risk factors of AKI are INR and SBP. AKI has significant impact on the short-term survival rate of ACLF.Therefore,physicians should pay attention to patients with INR of ACLF at admissions and SBP during the management so as to prevent the occurrence of AKI and to reduce the fatality of ACLF.

This study was aimed to evaluate the application of64-slice spiral CT in imaging anatomy of the normal optic canal. The optic canals of 100 healthy subjects were examined by 64-slice spiral CT,and the imaging measurement of the anatomy structures were performed by the multi-planar reconstruction. The longest and the shorzest walls of the optic canal were the medial wall and the inferior wall, respectively.Results indicate that the imaging anatomic measurement of the optic canal can be accurately and easily performed by means of multi-planar reconstruction of 64-slice spiral CT.

Objective:To investigate the expression levels of interferon-α receptor (IFNAR), interferon-stimulated gene factor 3(ISGF3), double-stranded RNA-activated protein kinase(PKR) and ribonuclease L (RNase L) in patients with chronic hepatitis B (CHB) treated with interferon.Methods:From July 2014 to June 2017, 41 treatment naive CHB patients were enrolled in the Department of Infectious Diseases, First Affiliated Hospital of Nanchang University. Eighteen patients were treated with polyethylene glycol interferon α-2b, and 23 patients were treated with conventional interferon. The mRNA and protein expression levels of IFNAR1, IFNAR2, ISGF3, PKR and RNase L in peripheral blood mononuclear cells (PBMC) were detected by reverse transcription polymerase chain reaction and Western blot, respectively. The differences of these molecular expression levels in PBMC between the effective and ineffective groups were compared. The data were analyzed by t test. Results:After 24 weeks of treatment, 25 cases were effective, while 16 cases were ineffective. At four weeks of treatment, the mRNA expression levels of IFNAR1, IFNAR2 and PKR in PBMC of the effective group were 0.748±0.129, 1.169±0.125 and 1.047±0.091, respectively, which were all higher than those in the ineffective group (0.591±0.021, 0.689±0.059 and 0.791±0.033, respectively). The differences were statistically significant ( t=-4.304, 16.482 and -5.346, respectively, all P<0.01). The mRNA expressions of ISGF3 and RNase L in PBMC of the effective group were 0.739±0.159 and 0.780±0.140, respectively, while those in the ineffective group were 0.690±0.035 and 0.733±0.122, respectively, which were not significantly different ( t=-0.160 and -1.443, respectively, both P>0.05). The mRNA expression levels of IFNAR1, IFNAR2, ISGF3, PKR and RNase L at baseline, week eight, 12 and 24 of treatment in the effective group were all higher than those in the ineffective group (all P<0.01). The protein expression levels of IFNAR1, IFNAR2, ISGF3, PKR and RNase L in the effective group were all higher than those in the ineffective group (all P<0.01). Conclusion:After interferon treatment, the mRNA and protein expression levels of IFNAR1, IFNAR2, ISGF3, PKR and RNase L in PBMC of CHB patients are all increased, especially IFNAR2 and PKR levels increase in the early stage of treatment (four weeks).