Objective To explore the clinical characteristics of infectious mononucleosis (IM)with Epstein-Barr virus (EBV)and mycoplasma pneumoniae (MP)infection in children.Methods Children with IMwho were all positive for EBV and hospitalized in our department from January 2008 to July 2015 were included and divided into the EBV +MP group and the EBV group according to the results of MP.The manifestations,laboratory variables and outcomes were compared in the two groups.Results Of all these 61 cases,18 children (29.51%)were accompanied with EBV and MP infection.The age of the EBV +MP group was older than the EBV group [(4.44 ±2.75)vs (2.90 ± 2.08)years,t =2.401,P =0.02].Moderate to severe enlarged tonsils,hepatomegaly and complications (especially cough and gastrointestinal symptoms)were more common in the EBV +MP group than the EBV group with significant differences (remarkable tonsillitis:88.89 vs 48.84%,hepatomegaly:55.56 vs 13.95%,complications:72.22 vs 44.19%;χ2 =8.529,10.719 and 3.999 respectively;P =0.003,0.001 and 0.046 respectively).The WBC and lymphocyte counts,percentage of abnormal lymphocyte and the levels of glutamyltranspeptidase in the EBV +MP group were also significantly higher than the EBV group [WBC counts:(18.17 ±7.17)×109 /L vs (13.70 ±7.12)×109 /L], lymphocyte counts:(11.61 ±6.04)×109 /L vs (7.65 ±4.82)×109 /L,abnormal lymphocyte proportion:(20.69 ± 13.03)% vs (13.00 ±11.20)%,serum glutamyltranspeptidase:(99.41 ±91.20)U /L vs (47.95 ±69.22)U /L;t =2.231,2.716,2.215 and 2.239 respectively;P =0.029,0.009,0.031 and 0.029 respectively).But the average hospital stay and the recovery time of manifestations showed no significant differences in the two groups (P >0.05). Conclusion IMchildren with EBV and MP infection have more cases with moderate to severe enlarged tonsils,hepa-tomegaly and complications,moreover present higher lymphocyte and similar outcomes.MP should be tested in all IM children.The early diagnosis and treatment are the keys to improve the prognosis of IM children with EBV and MP infection.

BACKGROUND:Titanium and titanium aloy are used mostly in artificial joints, fracture fixation, and oral transplantation, while there are complex cases of insufficient bone mass in these areas. The deepened research of stem cels offers a solution for bone injury to promote new bone formation. The biocompatibility of titanium and stem cels and optimization of titanium surface modification have aroused people's attention. OBJECTIVE:To investigate whether the biocompatibility of titanium and human adipose-derived mesenchymal stem cels can be improved by type I colagen modification of titanium sheets. METHODS:The experiment was divided into two groups. Modification group: titanium sheet was modified with type I colagen; control group: titanium sheet was not modified with type I colagen. Human adipose-derived mesenchymal stem cels at passage 6 were implanted into titanium sheet in two groups. Then we calculated the number of adherent cels in two groups at 1, 2 and 4 hours after implantation, and compared the celladhesion rate. MTT assay was used to observe the proliferation of cels on titanium sheet at 2, 4, 6 and 8 days after implantation. DNA and protein content of cels were detected at 3, 6, 9 days after implantation. The growth of human adipose-derived mesenchymal stem cels seeded upon the titanium sheets was observed under scanning electron microscope at 6 days. RESULTS AND CONCLUSION:When the cels were cultured for 1 hour and 2 hours, the number of adherent cels in the modification group was higher than in the control group (P < 0.05). The absorbance of cels in two groups was increased as the culture time, as detected by MTT assay. The modification group had a significantly higher absorbance value than the control group at 4, 6, 8 days (P < 0.05). DNA and protein contents of the cels in the modification group were higher than that in control group at 6 and 9 days (P < 0.05). At 6 days, the number of adherent cels and secretion of adherent stromal cellmatrix in the modification group were significantly better than that in control group, observed by scanning electron microscopy. Type I colagen modified titanium sheets have good surface activity and biocompatibility, and can promote the proliferation of human adipose-derived mesenchymal stem cels.