Human cytomegalovirus (HCMV) infection is very common in the population. The form of infection usually presents silent or latent infection in the persons with normal immune function, but it can lead to a high mortality in the fetuses and the patients with immune deficiency. At present,the pathogenesis of the congenital infection by HCMV is not very clear. In the α chemokine homologue encoded by HCMV UL146, the variation of the nucleotide and amino acid sequences and the highly conservative domain suggests that this domain is important for HCMV in biological significance. And the study on the gene polymorphism and the function of its encoding protein will play an important role to reveal the pathogenesis of HCMV.

Objective To investigate the present incidence and the risk factors of retinopathy of prematurity (ROP).Methods The clinical data of 1 356 premature infants who were born in our hospital from Dec 2008 to Feb 2011 with birth weight of 2 500 g or less and gestational age of 37 weeks or less were analyzed retrospectively,and divided into ROP group(n =208) and without ROP group(n =1 148).They were screened for ROP from 4 ～ 6 weeks of chronological age or 32 weeks of postmenstrual age.Results In 1 356 cases,there were 208 cases with ROP,the incident rate was 15.34％,of which 36 cases were severe diseases (2.65％).Compared with the infants without ROP,the development of ROP was correlated with birth weight [(1 528 ±243) g vs (1 960 ± 187) g],gestational age [(30.92 ±0.72) weeks vs (32.87 ± 1.28) weeks],oxygen uptake time ＞ 8 d (123 cases vs 865 cases),pulmonary surfactants (18 cases vs 216 cases),septicemia (42 cases vs 154 cases),in utero distress (63 cases vs 511 cases) and anemia (64 cases vs 237 cases) (P ＜ 0.05).Logistic regression analysis suggested that birth weight,gestational age,oxygen uptake time ＞8 d,septicemia and pulmonary surfactants were significant risk factors associated with the development of ROP(P ＜ 0.05).Meanwhile,there were significant differences in the incidence of infants with ROP at different birth weight and different gestational age (P ＜ 0.05).Conclusion The birth weight and gestational age are lower,the incidence of ROP is higher and the disease is more serious.The probability of ROP,particularly severe ROP,is highest in the most immature infants while it is lower in the least immature ones.

Objective To study the clinical features and follow-up of newborns with severe hypoxic-ischemic encephalopathy ( HIE) , and to provide the basis for rational diagnosis, treatment and follow-up.Methods Clinical data of cases of HIE from the Neonatal Department of our Hospital from January 2011 to October 2014 were studied retrospectively. The data of general information, laboratory examination, treatment, outcome, follow-up and prognosis of the patients were collected. Multivariate logistic regression analysis was used to study the influential factors of the prognosis of HIE.Results A total of 123 infants with sever HIE were enrolled in our study. In addition to general therapy, 6 cases were treated with mild hypothermia, and 21 cases were treated with high pressure oxygen. 60 cases improved our treatment, 55 cases had withdrawal treatment with parental consent, and 8 cases died. Single factor analysis showed that 5 minutes Apgar score, convulsions, coma, pH, BE, organ injury, and mild hypothermia treatment were the risk factors that affect the prognosis of severe HIE. Multiple factors analysis showed that 5 min Apgar score <3 points ( OR=4. 071 ,95℅CI 1. 309-15. 613 ) and BE≤-10 mmol/L ( OR=36. 810, 95℅CI 5. 913-41. 119) were independent risk factors of prognosis of severe HIE ( P<0. 05). Hospitalization within the first 72 hours of life ( OR=0. 096, 95℅CI 0. 096-0. 353) was a protective factor of severe HIE. Multiorgan injury ( mainly the injury of brain, lung and heart) and electrolyte imbalance ( mainly hypocalcemia and hyponatremia ) were common complications of serve HIE. In the follow-up of these patients, 33 cases were loss in follow up, and 49 cases died (8 cases died during hospitalization, 41 cases died after withdrawal of treatment). The top five causes of death were abandonment of treatment due to financial reasons and the fear of adverse outcome (n=20), multiple organ dysfunction ( n =16 ) , and pneumothorax ( n =4 ) , diffuse intravascular coagulation (n=6), and shock (n=3). 41 cases survived were followed up for 9~54 months. The critical clinical conditions observed among these infants included cerebral palsy ( n = 5 ) , epilepsy ( n = 3 ) and developmental retardation(n=26).Conclusions There are many complications of severe HIE.The mortality of severe HIE is high, and the incidence of poor outcome of survivors is also high. Timely detection of risk factors is the key to the prevention of severe HIE. Long-term prognosis of severe HIE requires proper organization of neonatal follow up.

Objective To realize the clinical characteristics of fungemia in premature infants.Methods Clinical characteristics of fungemia in premature infants in the intensive care unit of a children''s hospital between January 2011 and December 2015 were analyzed retrospectively, general condition of premature infants, laboratory-related indicators, and antimicrobial susceptibility testing results were compared.Results From January 2011 to December 2015, 42 premature infants with confirmed fungemia were treated in this hospital, 22 (52.38％) of whom were with fungemia caused by Candida albicans(C.albicans), 13 (30.95％) by Candida parapsilosis (C.parapsilosis), 3 by Candida krusei (C.krusei), and 4 by other fungi.Patients were grouped according to the main pathogens causing infection: C.parapsilosis group and C.albicans group.Maternal genitourinary tract infection rate and incidence of fungal meningitis in C.albicans group were both higher than C.parapsilosis group(27.27％ vs 7.69％, 27.27％ vs 0.00％ respectively), peripherally inserted central catheter (PICC) rate in C.albicans group was lower than that in C.parapsilosis group(22.73％ vs 69.23％), platelet count in C.parapsilosis group was lower than C.albicans group, differences were all statistically significant (all P<0.05).Conclusion The major fungi causing fungemia in premature infants were C.parapsilosis and C.albicans, maternal reproductive system infection during pregnancy can easily lead to candidemia, premature infants with candidemia are more vulnerable to developing fungal meningitis;PICC is more likely to lead to C.parapsilosis fungemia, and platelet decline is more obvious.

Objective To investigate the polymorphism of human cytomegalovirus（HCMV）UL146 gene in clinical strains,and to evaluate its clinical diagnostic and therapeutic value of gene.Methods The UL146 gene of clinical strains was examined by quantitative polymerase chain reaction（Q-PCR）or general polymerase chain reaction（PCR）.Positive samples of PCR amplification were sequenced and analyzed.Results High variability of UL146 gene was found among 28 HCMV strains.According to phylogenetic analysis,all sequences of UL146 in clinical strains could be divided into three types and four subtypes.Chemokine ELRCXC region was highly conserved in all sequences.Conclusion HCMV-UL146 genes showed a high degree of polymorphism,and its encoded chemokine ELRCXC region was highly con-served.The relationship between HCMV-UL146 gene′s polymorphism and different clinical symptoms of HCMV infection was unclear.

Objective To observe the effect of shock lymph drainage on multiple organ injury of rats with traumatic hemorrhagic shock (THS) and discuss the relating mechanism. Methods Male Wistar rats were divided into control group, lymph drainage group and lymph return group. The THS model was established in lymph drainage group and lymph return group, when the shock mesenteric lymph was drained in lymph drainage group. The change of the mean arterial pressure ( MAP), the biochemical indices of liver, kidney, myocardium and acid-base, the morphology, ATP contents and ATPase activities of lung, kidney, liver and myocardium were observed. Results The MAP at multiple time points after 80 minutes of infusion, the ATP contents and ATPase activities of multiple organs in lymph drainage group were higher than those in lymph return group. Multiple biochemical indices in lymph drainage group were superior to those in lymph return group, with statistical difference. The inflammation, congestion, degeneration and necrosis were found in organs of lymph return group, but only mild lesions could be seen in lymph drainage group. Conclusions The shock lymph drainage can alleviate multiple organ injury of THS rats, mechanism of which is correlated with improvement of the energy metabolism and maintenance of MAP and acid-base status.

Primary immune thrombocytopenia (ITP) in pregnancy is a special type of ITP,its impact on the mother and fetus cannot be ignored.The correct diagnosis and effective treatment of ITP in pregnancy are the focus of the clinical practice and medical research.This article reviews the progress on the management of the primary immune thrombocytopenia in pregnancy.

Objective To examine the influencing factors related to clinical efficacy and outcomes of adult primary immune thrombocytopenia (ITP).Methods The clinical data of 161 cases of ITP admitted in the Second Hospital of Shanxi Medical University from June 2013 to March 2017 were collected.The influencing factors related to clinical efficacy and prognosis of adult ITP patients were analyzed.Results There were 60 males and 101 females with a M/F ratio of 0.59∶1 and a median age of 45 years (18-84 years).There were 109 newly diagnosed ITP cases,14 persistent ITP cases and 38 chronic ITP cases in this series.Seventy nine patients received intravenous immunoglobulin g (IVIg) treatment and 82 patients received high dose-dexamethasone treatment.There were no significant differences in clinical efficacy [91.13％(72/79) vs.87.80％(72/82),x2=0.181,P=0.914] and relapse rate [36.11％(26/72) vs.30.55％(22/72),x2=0.189,P=0.910] between IVIg and high dose-dexamethosone groups.Multivariate regression analysis showed that bleeding score ≥2 was the independent risk factor for the lower clinical efficacy (RR=1.415,95％CI:1.008-1.986,P＜0.05).Patients were followed up for a median of 9.0 months (0.5-55.0 months),48 patients relapsed with a relapse rate of 33.33％ and a median relapse time of 1.8 months (0.5-24.0 months).Conclusions IVIg and high dose-dexamethasone have the similar clinical efficacy and relapse rate for treatment of adult ITP.The patients with the bleeding score ≥2 are more likely to get lower remission rate.

Objective To study the transport risk and factors that influence deaths of very low birth weight (VLBW) and extremely low birth weight (ELBW) infants.Method All infants transferred to our neonatal intensive care unit (NICU) by our hospital transport team or local hospital transport team from January 2014 to December 2015 were included in our study.Their clinical data were retrospectively studied.The risks of transport between hospitals were analyzed.The risk factors of deaths within and after 7 days of admission were further analyzed by multivariate Logistic regression analysis.The receiver operation characteristic (ROC) curve was used to assess the sensitivity and specificity of mortality index for neonatal transportation (MINT),transport related mortality score (TREMS),transport risk index of physiologic stability (TRIPS) for predicting mortality of preterm infants.Result (1) A total of 527 cases of ELBW/VLBW infants were included in our study.There were no deaths during transport.There were 10.2％ (54/527) died within and 8.9％ (42/473) died after 7 days of hospitalization.(2) Multivariate Logistic regression analysis showed that scleredema of newborn,secondary transport,gastrointestinal malformations,metabolic acidosis,high TREMS score,and high MINT score were risk factors of mortality within 7 days of admission for ELBW/VLBW infants;necrotizing enterocolitis,intraventricular hemorrhage ≥ three degree,high MINT score and low admission weight were risk factors of mortality after 7 days of admission.(3) The area under the ROC curve for MINT,TREMS,and TRIPS score were 0.672,0.655 and 0.665,respectively.The cut-off values for MINT score (cut-off 8,sensitivity 0.444,specificity 0.829),for TREMS score (cut-off 2,sensitivity 0.500,specificity 0.757,for TRIPS score (cut-off 20,sensitivity 0.444,specificity O.829) were selected to predict mortality within 7 days of admission.Conclusion (1) Secondary transport is the transport-related risk factor of mortality within 7 days of admission for ELBW/VLBW infants.(2) High MINT score is the risk factor of mortality within and after 7 days of admission.(3) If MINT ≥ 8,TREMS ≥2,or TRIPS ≥20,it might significantly increase the risk of mortality of ELBW/ VLBW infants within 7 days of admission after transport.

Objective To study the occurrence of bronchopulmonary dysplasia (BPD) in extremely low birth weight (ELBW) infants and to determine the risk factors of severe BPD.Method From January 2007 to January 2017,ELBW infants admitted to neonatal intensive care unit (NICU) in Hunan Children's Hospital were retrospectively analyzed.They were assigned into severe and mild/moderate groups based on the severity of BPD.The general condition,maternal status,prenatal and delivery room treatment,transportation,clinical courses,therapy and outcome in NICU of the two groups were compared,and the risk factors of severe BPD were analyzed.Result A total of 367 cases were hospitalized during the 10 years.281 ELBW infants with complete medical records survived longer than 28 days were enrolled in this study.Among them,233 had BPD.Among BPD infants,116 cases were in the severe BPD group,47 cases (40.5％) died.117 cases were in the mild/moderate BPD group and 1 case (0.9％) died.The difference between the two groups was statistically significant (P ＜ 0.05).Multivariate Logistic regression analysis showed that the risk factors of severe BPD were duration of mechanical ventilation ≥ 7 days (OR =7.518,95 ％ CI 3.197 ～ 17.676),ventilator-associated pneumonia (OR =3.047,95 ％ CI 1.436 ～ 6.464),1 min Apgar score ≤7 (OR =2.341,95 ％ CI 1.142 ～ 4.796) and patent ductus arteriosus (OR =2.223,95 ％ CI 1.079 ～4.582).Conclusion The incidence and mortality of BPD,especially severe BPD,are high in ELBW infants.Avoiding asphyxia,shortening the time of mechanical ventilation,preventing infection and closing ductus arteriosus are important measures to reduce the severity of BPD.