Clinical analysis of 36 children with pneumonia caused by coinfection of human adenovirus type 7 and Mycoplasma pneumoniae / 中华实用儿科临床杂志

Objective:To summarize the clinical features of children with pneumonia caused by coinfection of human adenovirus type 7 and Mycoplasma pneumoniae.Methods:A total of 36 children with pneumonia caused by coinfection of human adenovirus type 7 and Mycoplasma pneumoniae (coinfection group) diagnosed in the Wuhan Children′s Hospital from December 1, 2018 to September 1, 2019 were enrolled.Their clinical manifestations, laboratory examinations, and imaging findings were retrospectively analyzed.In the same period, 94 children with single human adenovirus type 7 infection pneumonia were selected as the single infection group.Differences between 2 groups were compared using the Student′s t-test, rank sum test and Chi- square test. Results:In the coinfection group, 25 cases were males, 11 cases were females, their mean age was 3.11 years.The main clinical manifestations included fever (97.2%) and cough (100.0%). The mean body temperature was 40.0 ℃, with the thermal peak of 4 times per day, and the mean course of fever of 11 days.The incidence of severe pneumonia was significantly higher in coinfection group (86.1%) than that of single infection group (69.1%) ( χ2=3.878, P<0.05). The common complications included myocardial damage (55.5%), heart failure (16.7%), liver function damage (25.0%), gastrointestinal bleeding (5.5%), toxic encephalopathy (11.0%), hemophagocytic syndrome (16.7%), and bronchiolitis obliterans (50.0%). The levels of cytokines like interleukin (IL)-6 [237.84(108.59, 606.36) ng/L], IL-10[31.44(12.13, 69.60) ng/L]and interferon-γ [(102.85±92.23) ng/L] were obviously elevated, and among them, IL-6 and IL-10 elevations were significantly pronounced in coinfection group than that of single infection group[148.35(57.43, 390.82); 19.67(10.96, 35.35)] ( Z=-1.984, -2.077, all P<0.05). Lung consolidation (50.0%) and pleural effusion (38.9%) were common in coinfection group, and the incidence of pleural effusion in coinfection group was significantly higher than that of single infection group (19.1%)( χ2=5.594, P<0.05). Conclusions:Most of the pneumonia caused by human adenovirus type 7 mixed Mycoplasma pneumoniae in children is severe pneumonia, which may be related to the cytokine storm.

Screening and research of homologous peptide with adenovirus receptor / 中国免疫学杂志

Objective:To screen the binding peptide against adenovirus type 7(Ad7) and evaluate the relevance with the ade-novirus receptor .Methods:Binding peptide against Ad 7 was screened by panning the phage display 12 peptides library .The antibody against the selected peptide was prepared and was used to study the binding to the membrane by immunofluorescence technique .Re-sults:Using Ad7 as the target protein , GTS09 peptide was selected from the phage display 12 peptides library by biopanning .GTS09-phage complex could significantly bind Ad 7, with the affinity constant up to 1.93 ×1010 L/mol;at the same time, immunofluorescence showed that antibody of GTS09 could specifically bind to membrane of 293 cell.Conclusion: Antibody against GTS09 peptide could specifically bind to membrane of 293 cell,which shows that the peptide may presumably have homology with the cell receptors of Ad 7.

Clinical characteristics analysis of adult human adenovirus type 7 infection / 中华传染病杂志

Objective To investigate the clinical characteristics of patients infected with human adenovirus type 7 and to provide guidance for early diagnosis and timely control of the outbreak.Methods A total of 301 patients infected with the human adenoviruses who were quarantined in hospital from December 2012 to February 2013 were observed.Epidemiological questionnaires were used to collect data of clinical features of the disease including symptoms,signs,images and laboratory tests.To confirm infection,real time polymerase chain reaction was performed using patients' swabs to detect viral nucleotide.Results Most cases happened in December to the next February.Totally 277 cases of the 301 patients were male,and only 24 cases were female.Mean age was (19.1±1.9) years old,range 15 to 29 years old.Identifiable epidemiologic links were seen between patients.The most common symptoms were fever (100.0％),cough (70.4％),expectoration (48.2％),and sore throat (47.8％).In addition,some patients presented with headache,dizziness,chills,fatigue.The most common signs were pharyngeal congestion (62.5％),enlargement of tonsils (56.5％) and lymphatic follicular hyperplasia (26.6％).Some patients' tonsil was covered with white secretions.Lung images were abnormal in 75 cases,which were presented with mild pneumonia with or without surrounding exudative lesions and pleural effusion in lung images.Laboratory tests showed that the number of white blood cells in the peripheral blood in most of the patients (99.0 ％) was elevated or normal.The proportions of neutrophils (54.2％) and monocytes (80.7％) and the level of C-reactive protein (42.2％) increased,while the proportion of lymphocytes reduced (67.1％).The average course of disease was (6.6±2.9) d.With the treatment of intravenous ribavirin and reduning,all patients were cured.Conclusions Human adenovirus type 7 is quite contagious and may cause epidemic outbreak,especially in winter.The majority exhibits mild symptoms of upper respiratory tract infection with short duration,including fever,cough,expectoration and sore throat.Through timely and active treatment,all patients have a good prognosis.

Simultaneous Detection of Adenovirus types 3, 7 and 11 by a Multiplex PCR from Cell Cultured Clinical Specimens of Hospitalized Patients

Adenovirus (AD) is classified into A, B, C, D, E and F subgenera on the basis of neutralization, hemagglutination and DNA homology tests. Six AD subgenera have 51 serotypes. We selected AD types 3, 7, and 11 since they are known to frequently cause respiratory disease, gastrointestinal disease and meningitis, which often require hospitalization of the patients. The purpose of this study was to detect and to evaluate the correlation of AD types 3, 7 and 11 and the diseases. The detection method, used for AD types 3, 7 and 11, was a multiplex polymerase chain reaction (PCR) with HEp-2 cell cultured with clinical samples. The result was as follows: AD 3 (22/62, 35.5%), AD 7 (27/62, 43.5%), and AD 11 (50/62, 80.6%) were detected by the multiplex PCR in 62 clinical samples. AD 3 detection rate in cerebrospinal fluid was relatively higher than in other specimens but its statistical significance was low (p=0.07). AD 11 was detected (50/62, 80.6%) with the highest frequency and appeared to significantly be associated with gastroenteritis, respiratory disease, and meningitis in hospitalized children, and arthritis in adult patients. AD 3, AD 7 and AD 11 types were detected singly in 21/62 (33.9%), doubly in 15/62 (24.2%), and triply in 16/62 (25.8%). The multiplex PCR method using Hep2 cell culture with clinical specimens could detect AD types 3, 7, and 11 in children with meningitis, respiratory infection, or gastroenteritis, and in adults with cancer and arthritis.

Bronchiolitis Obliterans after Adenovirus Type 7 Pneumonia / 소아알레르기및호흡기학회지

PURPOSE: The purpose of this study was to document bronchiolitis obliterans, the long term pulmonary sequelae of adenovirus type 7 pneumonia, using High Resolution CT(HRCT) and to identify risk factors that increase the likelihood of developing bronchiolitis obliterans. METHODS: Thirty-nine children were admitted to the Inje University, Sanggye Paik Hospital in the early summer of 1996 with clinical adenoviral pnemonia. Type 7 adenovirus was isolated from 11 children. All eleven were reassessed clinically and performed HRCT in 1997, one year (12.1+/-1.9 mo) after the adenovirus type 7 pnemonia. RESULTS: Seven (64%) had HRCT findings of BO(BO group) including mosaic perfusion, attenuation of pulmonary vessel and bronchiectasis, Four(36%) had a normal HRCT finding(Non-BO group). The mean age of the children on admission was lower in BO group(15.3+/-7.1 mo) than Non-BO group(35.3+/-14.2 mo) (P<0.05). The mean duration of fever was longer in BO group(14.4+/-2.8 days) than Non-BO group(6.3+/-2.5 days)(P<0.01). The mean duration of initial hospital admission was longer in BO group(28.0+/-10.8 days) than Non-BO group (9.8+/-3.6 days)(P<0.01). But the sex ratio between the two groups was not statistically significant. Four of the seven BO group subjects had bronchial asthma, and three of the four patients had persistent wheezing . CONCLUSIONS: Adenovirus type 7 pneumonia is closely associated with bronchiolitis obliterans, the important long term pulmonary sequelae. The risk factors which increase the possibility of developing bronchiolitis obliterans are: the young age of the child, the long fever duration , and the long admission duration.

MeaSurement of Relative Affinity and Specificity of Monoclonal Antibodies / 中国免疫学杂志

To measure the relative affinity and type Specificity of neutralizing monoclonal antibodies against the hexon antigen of adenovirus type 7,a simple ELISA double antibody binding system has been developed.By this method,ralative affinity of nine MAbs was estimated from the antibody concentrations at approximately 50% of plateau binding and were ranked.The theoretical basis for this method was discussed. Hybridomas secreting antibodies of desired affinity can be selected at an early stage after fussion by measuring relative affinity of hybridomas supernatants.The type specificity was judged by the difference between end-point concentration against adeno- virus type 7 and type 3.And the relation between affinity and specificity of MAbs was discussed.