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Chinese Journal of Biotechnology ; (12): 1269-1276, 2020.
Article in Chinese | WPRIM | ID: wpr-826850


Human adenoviruses are widespread causative agent that induces respiratory diseases, epidemic keratoconjunctivitis and other related diseases. Adenoviruses are commonly used in experimental and clinical areas. It is one of the most commonly used virus vectors in gene therapy, and it has attracted a lot of attention and has a high research potential in tumor gene therapy and virus oncolytic. Here, we summarize the biological characteristics, epidemiology and current application of adenovirus, in order to provide reference for engineering application of adenovirus.

Adenovirus Infections, Human , Epidemiology , Virology , Adenoviruses, Human , Genetics , Genetic Engineering , Methods , Genetic Vectors , Humans , Oncolytic Virotherapy , Oncolytic Viruses , Genetics , Virus Replication
Neumol. pediátr. (En línea) ; 14(1): 52-54, abr. 2019. ilus
Article in Spanish | LILACS | ID: biblio-995744


Adenovirus (ADV) can cause serious, localized or disseminated, sometimes lethal disease. There is no specific treatment, only support management according to requirements and severity of disease. Extracorporeal membrane oxygenation (ECMO) has been used in severe ADV infection. Cidofovir has been reported as a therapeutic option. This case reports a lethal case of ADV respiratory infection despite the treatment with cidofovir an ECMO.

El adenovirus (ADV) puede causar infección respiratoria grave, localizada o diseminada y letal en pacientes susceptibles. No existe terapia específica, solo de soporte según requerimientos y gravedad. En este sentido el manejo con oxigenación por membrana extracorpórea (ECMO) ha sido utilizado en niños con infección grave por ADV. Si bien no existe terapia específica actual se ha reportado uso de cidofovir que ha ganado espacio como posibilidad terapéutica en caso de enfermedad grave. Se presenta el caso clínico de un paciente que cursó con infección letal por ADV a pesar del tratamiento de soporte con ECMO y el tratamiento con cidofovir.

Humans , Male , Infant , Antiviral Agents/therapeutic use , Extracorporeal Membrane Oxygenation/methods , Adenovirus Infections, Human/therapy , /therapeutic use , Antiviral Agents/adverse effects , Adenovirus Infections, Human/physiopathology , Fatal Outcome , Renal Insufficiency/chemically induced , /adverse effects , Multiple Organ Failure
Neumol. pediátr. (En línea) ; 14(1): 12-18, abr. 2019. ilus, tab
Article in Spanish | LILACS | ID: biblio-995613


Acute respiratory infections represent a world pediatric health burden. RSV, influenza and adenoviruses are among the most frequent causative agents. Adenoviruses usually produce upper respiratory infections, but they can be responsible for acute lower respiratory infection in children with severe clinical outcome. It is necessary a special clinical and epidemiological organization to avoid nosocomial adenovirus local outbreaks. Rapid diagnose, done by immunofluorescence assay and PCR, individual case isolation and supportive therapy are necessary for an appropriate management. The increasing immune compromised population represents a challenge for the adenovirus diagnosis with quantitative PCR and for nosocomial infection control and potential antiviral treatment.

Las infecciones respiratorias agudas son un problema prioritario mundial de morbimortalidad infantil y son causadas predominantemente por virus, entre los que destacan el virus respiratorio sincicial (VRS), virus influenza (FLU) y adenovirus (ADV). Los ADV normalmente causan infecciones respiratorias altas, pero pueden provocar infecciones bajas muy graves, que dejan secuelas y tienen alta letalidad. Requieren un manejo clínico y epidemiológico especial para evitar los graves brotes nosocomiales observados en Latinoamérica. Esto incluye un diagnóstico rápido hecho con técnicas de inmunodiagnóstico y reacción en cadena polimerasa (PCR), aislamiento individual del paciente y terapia de soporte. En pacientes inmunocomprometidos, la infección por ADV representa un gran desafío para el diagnóstico, con uso de PCR cuantitativo (qPCR) y eventual tratamiento antiviral. El objetivo de esta revisión es el de actualizar las propiedades, patogenia, epidemiología y diagnóstico del ADV, con énfasis en los cuadros respiratorios de mayor morbimortalidad que se producen en algunos niños.

Humans , Infant , Child , Respiratory Tract Infections/diagnosis , Respiratory Tract Infections/etiology , Adenovirus Infections, Human/diagnosis , Adenovirus Infections, Human/etiology , Respiratory Tract Infections/therapy , Respiratory Tract Infections/epidemiology , Respiratory Tract Infections/virology , Adenovirus Infections, Human/therapy , Adenovirus Infections, Human/epidemiology , Adenoviruses, Human/pathogenicity
Neumol. pediátr. (En línea) ; 14(1): 19-22, abr. 2019.
Article in Spanish | LILACS | ID: biblio-995615


Post-infectious bronchiolitis obliterans (BOPI) is a chronic obstructive disease, resulting from an acute injury and an abnormal repair process, with diffuse pulmonary fibrosis and peribronchiolar fibrosis, which cause chronic respiratory failure with prolonged oxygen dependence. The most common cause of this disease is severe bronchiolitis / pneumonia due to adenovirus (ADV), mainly in group B, before 2 years of age. In its pathogenesis are factors of the host and the characteristics of the virus that has mechanisms to prevent immunity and cause a chronic infection with great inflammatory response. This involves numerous cells (mainly lymphocytes) and cytokines that are produced by a chronic infection by ADV, which maintains a prolonged inflammatory process, determining different degrees of lung damage. In this article we will discuss the mechanisms by which this damage occurs.

La bronquiolitis obliterante postinfecciosa (BOPI) es una enfermedad obstructiva crónica, resultante de una injuria aguda y un proceso de reparación anómalo, con fibrosis pulmonar y peribronquiolar difusa, que causan insuficiencia respiratoria crónica con dependencia de oxigeno prolongada. La causa más frecuente de esta enfermedad es una bronquiolitis/neumonía grave por adenovirus (ADV), principalmente del grupo B, antes de los 2 años de vida. En su patogenia intervienen factores del huésped y las características del virus que tiene mecanismos para evitar la inmunidad y provocar una infección crónica con gran respuesta inflamatoria. En esta participan numerosas células (principalmente linfocitos) y citoquinas que se producen por una infección crónica por ADV, lo que mantiene un proceso inflamatorio prolongado, determinando distintos grados de daño pulmonar. En este artículo abordaremos los mecanismos por los cuales se produce este daño.

Humans , Child , Bronchiolitis Obliterans/etiology , Pneumonia, Viral/complications , Bronchiolitis Obliterans/prevention & control , Bronchiolitis Obliterans/epidemiology , Adenovirus Infections, Human/complications , Risk Factors
Article in Chinese | WPRIM | ID: wpr-775558


Human adenovirus (HAdV) is one of the common pathogens causing human respiratory infections and HAdV infection can result in a variety of diseases. In recent years, outbreaks of HAdV infection have been detected from time to time in China and clustered severe cases have been reported in some regions. This technical guideline has been timely developed to provide technical support on the control and prevention of HAdV respiratory infections. It provides an overview of etiology, epidemiology, clinical manifestations, and treatment principles of HAdV infection, determines the definitions of laboratory-confirmed cases, clinically diagnosed cases, severe and critically severe HAdV pneumonia cases. Then the workflow of case detecting and reporting, and the outbreak epidemic disposal has been formulated. Finally, the control and prevention measures in places at high risk for HAdV transmission and individual preventive measures also has been introduced.

Adenovirus Infections, Human , Virology , Adenoviruses, Human , China , Humans , Practice Guidelines as Topic , Respiratory Tract Infections , Virology
Article in English | WPRIM | ID: wpr-741361


PURPOSE: Human adenovirus infection mimics Kawasaki disease (KD) but can be detected in KD patients. The aim of this study was to determine the clinical differences between KD with adenovirus infection and only adenoviral infection and to identify biomarkers for prediction of adenovirus-positive KD from isolated adenoviral infection. METHODS: A total of 147 patients with isolated adenovirus were identified by quantitative polymerase chain reaction. In addition, 11 patients having KD with adenovirus, who were treated with intravenous immunoglobulin therapy during the acute phase of KD were also evaluated. RESULTS: Compared with the adenoviral infection group, the KD with adenovirus group was significantly associated with frequent lip and tongue changes, skin rash and changes in the extremities. In the laboratory parameters, higher C-reactive protein (CRP) level and presence of hypoalbuminemia and sterile pyuria were significantly associated with the KD group. In the multivariate analysis, lip and tongue changes (odds ratio [OR], 1.416; 95% confidence interval [CI], 1.151–1.741; P=0.001), high CRP level (OR, 1.039; 95% CI 1.743–1.454; P= 0.021) and sterile pyuria (OR 1.052; 95% CI 0.861–1.286; P=0.041) were the significant predictive factors of KD. In addition, the cutoff CRP level related to KD with adenoviral detection was 56 mg/L, with a sensitivity of 81.8% and a specificity of 75.9%. CONCLUSION: Lip and tongue changes, higher serum CRP level and sterile pyuria were significantly correlated with adenovirus-positive KD.

Adenoviridae , Adenoviridae Infections , Adenovirus Infections, Human , Biomarkers , C-Reactive Protein , Discrimination, Psychological , Exanthema , Extremities , Humans , Hypoalbuminemia , Immunization, Passive , Lip , Mucocutaneous Lymph Node Syndrome , Multivariate Analysis , Polymerase Chain Reaction , Pyuria , Sensitivity and Specificity , Tongue
Rev. Soc. Bras. Med. Trop ; 50(5): 621-628, Sept.-Oct. 2017. tab, graf
Article in English | LILACS | ID: biblio-897017


Abstract INTRODUCTION: Acute gastroenteritis (AGE) is one of the most common causes of morbidity and mortality, especially among children from developing countries. Human adenovirus (HAdV) and sapovirus (SaV) are among the agents that cause AGE. The present study aimed to detect and genotype HAdV and SaV in 172 fecal samples from children with AGE, collected during a surveillance study carried out in a low-income community in Belém, Pará, between 1990 and 1992. METHODS: HAdV was detected by nested PCR, using primers Hex1deg/Hex2deg and NeHex3deg/NeHex4deg. SaV was assayed by reverse transcription PCR (RT-PCR), nested PCR, and quantitative PCR. The nucleotide sequence was determined by direct cycle sequencing. RESULTS: Overall, 43% (74/172) of samples were positive for HAdV, of which 70.3% (52/74) were sequenced and classified as belonging to five different species, mostly A and F. For SaV, positivity was 5.2% (9/172) and genotypes GI.1, GI.7, GII.1, and GV.2 were detected. CONCLUSIONS: The present results reinforce the need for further studies to obtain epidemiological data about the circulation of these viruses in Brazil, especially in the Amazon Region, where data from the early 1990's are scarce. Furthermore, the study describes for the first time the detection of SaV genotypes GI.7 and GV.2 in Brazil, showing that these types circulated in the region more than 25 years ago.

Humans , Male , Female , Infant, Newborn , Infant , Child, Preschool , Brazil/epidemiology , Adenoviruses, Human/isolation & purification , Caliciviridae Infections/virology , Sapovirus/isolation & purification , Gastroenteritis/virology , Genotype , Phylogeny , Time Factors , Base Sequence , Adenovirus Infections, Human/epidemiology , Adenovirus Infections, Human/virology , Adenoviruses, Human/genetics , Polymerase Chain Reaction , Prevalence , Prospective Studies , Age Distribution , Caliciviridae Infections/epidemiology , Sapovirus/genetics , Genotyping Techniques/methods , Gastroenteritis/enzymology , Genes, Viral
Arch. pediatr. Urug ; 88(2): 91-94, abr. 2017.
Article in Spanish | LILACS | ID: biblio-838645


La enfermedad de Kawasaki es una vasculitis febril aguda propia de la infancia con afectación de vasos de pequeño y mediano calibre. Predomina en niños de entre 1 a 5 años, siendo excepcional en lactantes. El diagnóstico se basa en criterios clínicos, sin embargo debido a su frecuente presentación atípica genera dificultades diagnósticas que pueden determinar retardo en la instauración del tratamiento lo que repercute negativamente en el pronóstico. Se presenta el caso clínico de un lactante de 3 meses, previamente sano, que en el curso de una infección respiratoria por adenovirus desarrolla enfermedad de Kawasaki. La infección viral previa y/o concomitante, descrita en la literatura como un posible factor desencadenante en individuos genéticamente predispuestos, planteó mayores dificultades al equipo tratante. El objetivo de esta comunicación es alertar sobre la presentación de esta enfermedad en asociación con infecciones virales en edades precoces, para contribuir al diagnóstico y tratamiento oportunos.

Kawasaki disease (KD) is an acute febrile vasculitis of early childhood which affects small and medium blood vessels. It prevails in children between 1 to 5 years old, being it unusual in children younger than one year old. Diagnosis is based on clinical criteria, although, due to its frequently atypical presentation, it is difficult to diagnose, what may result in a delayed initiation of treatment and the subsequent negative impact on prognosis. The study presents the clinical case of a 3 month old child with a healthy medical record, who developed Kawasaki disease during a respiratory infection caused by adenovirus. A previous viral infection and/or concomitant, posed greater difficulties to the treating team because according to literature. Viral infections are described as possible triggering factors in individuals who are genetically predisposed. The objective of this comunication is to warn on how this medical condition can be associated to viral infections at early ages as well as to contribute to early diagnosis and treatment.

Humans , Male , Adenovirus Infections, Human/complications , Mucocutaneous Lymph Node Syndrome/diagnosis , Mucocutaneous Lymph Node Syndrome/etiology , Respiratory Tract Infections , Immunoglobulins/therapeutic use , Immunologic Factors/therapeutic use , Mucocutaneous Lymph Node Syndrome
S. Afr. med. j. (Online) ; 107(2): 123-126, 2017. tab
Article in English | AIM, AIM | ID: biblio-1271148


Background. Viruses have emerged as important aetiological agents of childhood pneumonia.Objective. To investigate the clinical presentation, severity and outcome of adenovirus-associated pneumonia (AVP) in children.Methods. A retrospective analysis of AVP cases over 12 months was performed, including demographic, clinical course and outcome (death, persistent lung disease (PLD)) data.Results. Two hundred and six AVP cases (median age 12 months, interquartile range 6 - 24) were identified; 70 children (34.0%) were malnourished and 14 (6.8%) were HIV-infected. Twenty-nine children (14.1%) developed PLD, which was associated with hypoxia at presentation in 26 cases (89.7%; p=0.01) and necessitated admission to the intensive care unit (ICU) in 18 (62.1%; p<0.01); 18/206 children (8.7%) died. Admission to the ICU (odds ratio (OR) 8.3, 95% confidence interval (CI) 2.3 - 29.0) and a positive blood culture (OR 11.2, 95% CI 2.3 - 54.1) were independent risk factors for mortality.Conclusions. Adenovirus is a potential cause of pneumonia and PLD in young children in South Africa. ICU admission and a positive blood culture were associated with poor outcome

Adenovirus Infections, Human , Child , Lung Diseases, Obstructive , Pneumonia
Article in Korean | WPRIM | ID: wpr-9116


Epidemic keratoconjunctivitis is the most common type of infectious conjunctivitis, and is caused by adenoviruses. The mode of transmission is mainly through direct contact with ocular secretions. Epidemic keratoconjunctivitis is generally diagnosed based on a patient's clinical features, and additional measures, such as cell cultures, polymerase chain reaction, and rapid antigen detection tests, can further confirm the diagnosis. The most common symptoms include a foreign body sensation, tearing, and photophobia. The symptoms are usually expressed unilaterally in the initial phase, but gradually become bilateral. Frequently occurring complications include pseudomembrane formation and subepithelial infiltrates. Currently, no antiviral agent has been proven effective to alter the natural course of the disease, and treatment merely has a supportive role instead of a curative role. Therefore, preventive measures in medical offices and in the community are the most important methods of controlling the propagation of this disease.

Adenoviridae , Adenovirus Infections, Human , Cell Culture Techniques , Conjunctivitis , Conjunctivitis, Viral , Diagnosis , Foreign Bodies , Humans , Keratoconjunctivitis , Photophobia , Polymerase Chain Reaction , Sensation , Tears
Braz. j. microbiol ; 46(3): 749-752, July-Sept. 2015.
Article in English | LILACS | ID: lil-755826


Human adenoviruses (HAdV), members of the Adenoviridae family, are excreted through the fecal route and may be present in the feces of humans consuming contaminated food or water. The presence of HAdV from different serotypes in the feces of healthy individuals was already reported using conventional polymerase chain reaction; however, real-time PCR (qPCR) may reveal not only the rates of detection as well as demonstrate the viral loads excreted by healthy persons. Aiming to identify and characterize the presence of adenoviruses in stool samples, 147 fecal samples from patients with no records of diarrhea were analyzed (74 from winter season and 73 from summer) by Real-Time PCR (qPCR) assay and conventional PCR. HAdV genome was present in 43.8% (32/73) of stools samples collected during summer season and 21.6% (16/74) during winter. The rate of detection of genomic copies (gc) ranged from 4.04×102 to 6.72×105gc/g of feces among the 147 samples analyzed, of which the ranged of genomic copies of DNA HAdV was major in summer. All samples were negative when tested for rotaviruses (RV) and noroviruses (NoV) by PCR conventional and qPCR respectively. HAdV is excreted constantly by infected individuals in the absence of clinical signs and the occurrence may vary seasonally.


Adult , Female , Humans , Male , Middle Aged , Young Adult , Adenovirus Infections, Human/epidemiology , Adenoviruses, Human/genetics , Adenoviruses, Human/isolation & purification , Feces/virology , Adenovirus Infections, Human/virology , Adenoviruses, Human/classification , Brazil , Norovirus/genetics , Norovirus/isolation & purification , Real-Time Polymerase Chain Reaction , Rotavirus/genetics , Rotavirus/isolation & purification , Seasons
Rev. paul. pediatr ; 33(2): 136-141, Apr-Jun/2015. tab
Article in English | LILACS | ID: lil-750789


OBJECTIVE: Adenoviruses play an important role in the etiology of severe acute lower respiratory infection, especially in young children. The aim of the present study was to evaluate the Human Adenovirus (HAdV) detection by different methods (Direct Fluorescence Assay DFA and Nested Polymerase Chain Reaction nested PCR), among samples collected from different groups of pediatric patients. METHODS: Collection of samples was made in children with congenital heart disease (CHD 123 nasal aspirates collected in the years of 2005, 2007 and 2008) and in community children (CC 165 nasal aspirates collected in 2008). Children were eligible if they presented acute respiratory infection (ARI) of probable viral etiology, within up to 7 days of symptoms' onset. All studied samples were evaluated by DFA and nested PCR assay. RESULTS: Of the 290 samples included during the study period, 43 (14.8%) were positive on at least one test: 17/165 (10.3%) of the CC and 26/125 (20.8%) of the CHD children. The nested PCR detection rates in the community children were 15/165 (9.1%), and for children with CHD, 24/125 (19.2%). Molecular method showed higher detection rates when compared to the DFA test (p<0.001). Univariate analysis showed that children with congenital heart disease presented a significantly higher chance for acquiring the HAdV (Odds Ratio 2.3; 95% CI: 1.18-4.43). CONCLUSIONS: Based on data obtained in the present evaluation, we suggest that a routine surveillance should be performed in high risk patients by molecular methods, thus improving diagnostic flow and efficiency.

OBJETIVO: Os adenovírus desempenham um papel importante na etiologia da infecção aguda grave do trato respiratório inferior, especialmente entre crianças. O objetivo do estudo foi avaliar a detecção do adenovírus humano (HAdV) por diferentes métodos (imunofluorescência direta DFA e reação em cadeia da polimerase nested nested PCR) em amostras coletadas de diferentes populações de pacientes pediátricos. MÉTODOS: O material foi coletado de crianças portadoras de doença cardíaca congênita (DCC 123 aspirados nasais coletados em 2005, 2007 e 2008) e de crianças da comunidade (CC 165 aspirados nasais coletados em 2008). As crianças eram consideradas elegíveis se apresentassem infecção respiratória aguda (IRA) de provável etiologia viral, com até sete dias de início dos sintomas. Todas as amostras coletadas no estudo foram avaliadas por meio de DFA e nested PCR. RESULTADOS: De 209 amostras incluídas, 43 (14,8%) foram positivas em pelo menos um dos testes feitos: 17/165 (10,3%) das crianças da comunidade e 26/125 (20,8%) das crianças cardiopatas. As taxas de detecção por nested PCR foram 15/165 (9,1%) em crianças da comunidade e 24/125 (19,2%) em crianças cardiopatas. O método molecular mostrou maiores taxas de detecção quando comparado com a DFA (p<0,001). A análise univariada mostrou que as crianças portadoras de cardiopatia congênita apresentaram chance significativamente maior de adquirir HAdV (odds ratio 2,3; IC 95%: 1,18-4,43). CONCLUSÕES: Baseado nos resultados obtidos na presente avaliação, recomenda-se a vigilância de rotina em pacientes de risco (DCC) por métodos moleculares, que melhora o fluxo diagnóstico e a eficiência da detecção.

Humans , Male , Female , Child , Adenovirus Infections, Human , Molecular Diagnostic Techniques , Polymerase Chain Reaction
J. pediatr. (Rio J.) ; 90(1): 42-49, jan-feb/2014. tab, graf
Article in English | SES-SP, LILACS, SES-SP | ID: lil-703625


OBJECTIVE: To characterize and compare clinical, epidemiological, and laboratory aspects ofinfants with acute lower respiratory infection (ALRI) associated with the detection of adenovirus(ADV) or respiratory syncytial virus (RSV). METHODS: A preliminary respiratory infection surveillance study collected samples of nasopharyngeal aspirate (NPA) for viral research, linked to the completion of a standard protocol, from children younger than two years admitted to a university hospital with ALRI, between March of 2008 and August of 2011. Polymerase chain reaction (PCR) was used for eight viruses: ADV, RSV, metapneumovirus, Parainfluenza 1, 2, and 3, and Influenza A and B. Cases with NPA collectedduring the first 24 hours of admission, negative results of blood culture, and exclusive detection of ADV (Gadv group) or RSV (Grsv group) were selected for comparisons. RESULTS: The preliminary study included collection of 1,121 samples of NPA, 813 collected in thefirst 24 hours of admission, of which 50.3% were positive for at least one virus; RSV was identifiedin 27.3% of cases surveyed, and ADV was identified in 15.8%. Among the aspects analyzed inthe Gadv (n = 58) and Grsv (n = 134) groups, the following are noteworthy: the higher meanage, more frequent prescription of antibiotics, and the highest median of total white blood cellcount and C-reactive protein values in Gadv. CONCLUSIONS: PCR can detect persistent/latent forms of ADV, an aspect to be considered wheninterpreting results. Additional studies with quantitative diagnostic techniques could elucidatethe importance of the high frequency observed. .

OBJETIVO: Caracterizar e comparar aspectos clínicos, epidemiológicos e laboratoriais delactentes com evidências de infecção aguda do trato respiratório inferior (IATRI) associada à detecção do adenovírus (ADV) ou do vírus sincicial respiratório (VSR). MÉTODOS: Um estudo preliminar de vigilância de infecções respiratórias desenvolveu coleta de aspirado nasofaríngeo (ANF) para pesquisa viral, vinculada ao preenchimento de protocolo padrão, de menores de dois anos internados com quadro de IATRI em hospital universitário, entre março de 2008 e agosto de 2011. Utilizou-se técnica da reação em cadeia da polimerase (PCR) para oito vírus: ADV, VSR, metapneumovírus, parainfluenza 1, 2 e 3 e influenza A e B. Foram selecionados para comparações os casos com ANF coletado nas primeiras 24 horas da admissão, resultado de hemocultura negativo e detecção exclusiva de ADV (grupo Gadv) ou VSR (grupo Gvsr). RESULTADOS: O estudo preliminar incluiu coleta de 1.121 amostras de ANF, sendo 813 coletadas nas primeiras 24 h da admissão, das quais 50,3% foram positivas para ao menos um dos vírus, com VSR em primeiro lugar, em 27,3%, e ADV em segundo, em 15,8% dos casos pesquisados. Dentre os aspectos analisados nos grupos Gadv (n = 58) e Gvsr (n = 134), destacaram-se a média da idade mais elevada, maior frequência da prescrição de antibióticos e medianas mais elevadas para contagem total de leucócitos e valores da proteína C-reativa no Gadv. CONCLUSÕES: A PCR utilizada pode detectar formas persistentes/latentes de ADV, aspecto aser considerado ao interpretar os resultados. Estudos complementares com técnicas diagnósticas quantitativas, por exemplo, poderiam evidenciar a importância da elevada frequência verificada. .

Female , Humans , Infant , Male , Acute Disease , Adenovirus Infections, Human/virology , Respiratory Syncytial Virus Infections/virology , Respiratory Syncytial Virus, Human/isolation & purification , Respiratory Tract Infections/virology , Adenovirus Infections, Human/epidemiology , Age Distribution , Brazil/epidemiology , Hospitalization , Nasopharynx/microbiology , Polymerase Chain Reaction/methods , Respiratory Syncytial Virus Infections/epidemiology , Respiratory Tract Infections/epidemiology , Seasons
Chinese Journal of Virology ; (6): 408-411, 2014.
Article in Chinese | WPRIM | ID: wpr-280351


By analyzing the epidemiological and clinical features of adenovirus in children with acute respiratory tract infection (ARTI), we provide a theoretical basis for early clinical diagnosis and treatment. Nasopharyngeal secretions were collected from 3480 children with ARTI, who were hospitalized at the No. 2 Hospital of Changzhou from January 2011 to December 2012. Adenovirus were detected using direct immunofluorescence assays. A total of 80 samples were positive for adenovirus (2.30%). The rate of adenovirus infection during 2011 was significantly higher than that in 2012, and the infection rate was higher in summer and autumn than in winter and spring. The infection rate was 1.14% among children aged < 1-year-old and the rates were higher among children in other age ranges. Adenovirus was found to be an important ARTI pathogen in children in Changzhou, mainly affecting children older than 1 year. ADV infections have various clinical presentations, but affected children tend to be severely ill with poor outcomes.

Acute Disease , Epidemiology , Therapeutics , Adenovirus Infections, Human , Epidemiology , Therapeutics , Virology , Adenoviruses, Human , Classification , Genetics , Child , Child, Preschool , China , Female , Hospitalization , Humans , Infant , Male , Respiratory Tract Infections , Epidemiology , Therapeutics , Virology , Seasons
Chinese Journal of Virology ; (6): 154-161, 2014.
Article in Chinese | WPRIM | ID: wpr-356622


To investigate the morphogenetic process of human adenovirus type 41 (HAdV-41), 293TE cells were infected with purified wild-type HAdV-41, and ultrathin sections of infected cells were prepared and observed under a transmission electron microscope. Results showed that HAdV-41 entered host cells mainly through three ways: non-clathrin-coated pit, clathrin-coated pit, and direct penetration of plasma membrane. In addition, cell microvilli might help HAdV-41 enter cells. After entering into cells, HAdV-41 virus particles could be found in vacuoles or lysosomes or be in a free state in cytoplasm. Only free virus particles could be found near nuclear pores (NP), suggesting that the virus needed to escape from lysosomes for effective infection and viral nucleoprotein entered the nucleus through NP. Progeny viruses were as-sembled in the nucleus. Three types of inclusion bodies, which were termed as fibrillous inclusion body, condense inclusion body, and stripped condense inclusion body, were involved in HAdV-41 morphogenesis. In the late phase of viral replication, the membrane integrity of the infected cells was lost and viral particles were released extracellularly. This study reveals the partial process of HAdV-41 morphogenesis and provides more biological information on HAdV-41.

Adenovirus Infections, Human , Virology , Adenoviruses, Human , Genetics , Physiology , Cell Membrane , Virology , Cell Nucleus , Virology , Humans , Virus Release , Virus Replication
Chinese Journal of Virology ; (6): 193-200, 2014.
Article in Chinese | WPRIM | ID: wpr-356616


Human adenovirus (HAdV) is one of the most important pathogens in infants and young children with acute respiratory infections and other diseases. This article reviews the literature on HAdV, including its molecular biological characteristics, detection and typing, and pathogenic mechanism, the clinical features and epidemiological characteristics of HAdV-related diseases, and the prevention and control of HAdV infections. So far, 67 types of HAdV have been identified, including recombinant variants discovered in recent years. The major epidemic strains that cause acute respiratory infections are HAdV-3 and HAdV-7, both of which belong to the subgroup B. HAdV often leads to acute respiratory infections, but it also causes diseases of other systems. HAdV-related diseases have similar clinical manifestations as those caused by other respiratory viruses, but often accompanied by gastrointestinal symptoms. The pathogenic mechanism of HAdV remains unclear, especially for the new recombinant variants, due to few studies on their association with diseases. Because there are no prospective, large randomized controlled trials of HAdV infections, the treatment of HAdV infections is controversial. Vaccine is the most effective measure to reduce respiratory HAdV infections, but it is still not commercially available.

Adenovirus Infections, Human , Virology , Adenoviruses, Human , Classification , Genetics , Physiology , Animals , Humans
Arch. pediatr. Urug ; 84(4): 263-269, dic. 2013. graf, tab
Article in Spanish | LILACS | ID: lil-754212


El adenovirus (ADV) causa 2%-15% de las hospitalizaciones por infecciones respiratoria agudas bajas (IRAB) virales en niños. Numerosas series han reportado alta tasa de mortalidad y secuelas pulmonares. Se realizó un estudio retrospectivo con el objetivo de describir las características epidemiológicas, clínicas y radiológicas de niños hospitalizados por IRAB causada por ADV entre abril y setiembre de 2008. Se identificaron 100 casos. El 66% ocurrió en junio-julio, 60% eran varones y 54% menores de 6 meses. Presentaron comorbilidad 15 niños. Las manifestaciones clínicas y los hallazgos radiológicos fueron similares a las encontradas en otras series. La media de estadía hospitalaria fue de 8,8 días. Ingresaron a unidad de cuidados intensivos (UCI) 12 niños y nueve requirieron asistencia ventilatoriamecánica (AVM). Un niño falleció y uno evolucionó a la oxigeno-dependencia. En 31 niños hubo infección mixta con VRS, su evolución no mostró mayor gravedad. Los casos de infección intrahospitalaria fueron 20%; sus características clínicas y su evolución fueron similares a los casos extrahospitalarios. En el período analizado las hospitalizaciones por IRAB por ADV fueron más numerosas que en años anteriores y presentaron menor severidad que la observada anteriormente...

Humans , Male , Adolescent , Female , Infant, Newborn , Infant , Child, Preschool , Child , Respiratory Tract Infections/diagnosis , Respiratory Tract Infections/epidemiology , Adenovirus Infections, Human/diagnosis , Adenovirus Infections, Human/epidemiology , Adolescent, Hospitalized , Child, Hospitalized , Uruguay
Rev. chil. pediatr ; 84(5): 522-526, oct. 2013. ilus, tab
Article in Spanish | LILACS | ID: lil-698673


Introducción: Las infecciones por adenovirus se diseminan rápidamente en recintos cerrados causando brotes asociados a gran morbimortalidad. Objetivos: Identificar tasa de ataque (TA) de infección por adenovirus en hospital de niños con enfermedades respiratorias crónicas (ERC) y evaluar factores asociados que faciliten la infección. Pacientes y Método: Entre junio y octubre de 2010 se evaluaron 50 niños con ERC del Hospital Josefina Martínez. Ellos estuvieron expuestos durante el invierno a pacientes con infección respiratoria aguda baja. A los pacientes con ERC sintomáticos (fiebre y cambio en su signología respiratoria basal) se les realizó Inmunofluorescencia Directa (IFD) Viral. "Caso" fue definido como "paciente sintomático e IFD positiva para Adenovirus". Se evaluaron TA primaria, secundaria y global. Variables como género, edad, traqueostomía y gastrostomía fueron analizadas buscando asociación con los casos. Resultados: El 44 por ciento de los pacientes eran lactantes. El 68 por ciento tenía traqueostomía y 54 por ciento gastrostomía. El primer paciente con Adenovirus ingresó en junio y el caso primario apareció dos semanas después. Hubo 25 casos secundarios que representaron TA secundaria de 51 por ciento. La TA global fue 52 por ciento. No hubo fallecidos. Los lactantes tuvieron un riesgo tres veces mayor que los niños mayores de contraer la infección (OR 3,31 [IC95 por ciento 1,02-10,72; p = 0,046]). No hubo asociación significativa con traqueostomía, gastrostomía ni género. Conclusiones: La alta diseminación de la infección por adenovirus en recintos cerrados obliga a extremar las medidas de prevención de IAAS especialmente en lactantes.

Introduction: Intrahospital adenovirus infections spread rapidly in closed environments causing outbreaks associated with high morbidity and mortality. Objectives: To identify the attack rate (AR) of adenovirus in a hospital treating children with Chronic Respiratory Diseases (CRD) and to evaluate associated factors that facilitate infection. Patients and Methods: Fifty children with CRD were evaluated between June 2010 and October 2010 at Josefina Martinez Hospital. They were exposed to patients with acute lower respiratory infection during winter. Patients with CRD symptoms (fever and change in basal nasal mucus) underwent Viral Direct Immunofluorescence (DIF). The case was defined as "symptomatic patient with positive DIF for Adenovirus". Primary, secondary and global ARs were evaluated. Variables such as gender, age, tracheostomy and gastrostomy were analyzed looking for associations with the cases. Results: 44 percent of patients were infants; 68 percent of children had tracheostomy and 54 percent had gastrostomy. The first patient with Adenovirus was admitted in June and the primary case was reported two weeks later. 25 cases presented secondary AR corresponding to 51percent Global AR was 52 percent overall. No mortality was reported. The risk was three times higher in infants than older children (OR 3.31 [IC95 percent 1.02-10.72; p = 0.046]). No significant associations with tracheostomy, gastrostomy and gender were found. Conclusions: The rapid spread of adenovirus infection in closed environments requires extreme prevention measures especially regarding infants.

Humans , Male , Female , Infant, Newborn , Infant , Child, Preschool , Child , Respiratory Tract Diseases/epidemiology , Adenovirus Infections, Human/epidemiology , Chile , Chronic Disease , Disease Outbreaks , Gastrectomy/adverse effects , Hospitals, Pediatric/statistics & numerical data , Cross Infection/epidemiology , Adenovirus Infections, Human/surgery , Retrospective Studies , Risk Factors , Tracheostomy/adverse effects
Rev. Soc. Bras. Med. Trop ; 46(2): 161-165, Mar-Apr/2013. tab, graf
Article in English | LILACS | ID: lil-674638


INTRODUCTION: Human adenoviruses (HAdV) play an important role in the etiology of severe acute lower respiratory infection, especially in immunocompromised individuals. The aim of the present study was detect the HAdV through different methods: direct fluorescence assay (DFA) and nested-polymerase chain reaction (PCR-nested) from patients with acute respiratory infection (ARI) up to 7 days of symptoms onset. METHODS: Samples (n=643) were collected from different risk groups during from 2001 to 2010: 139 adults attended in an Emergency Room Patients (ERP); 205 health care workers (HCW); 69 from Renal Transplant Outpatients (RTO); 230 patients in hematopoietic stem cell transplantation (HSCT) program. RESULTS: Among all patients (n=643) adenovirus was detected on 13.2% by DFA and/or PCR: 6/139 (4.3%) adults from ERP, 7/205 (3.4%) from HCW samples, 4/69 (5.8%) from RTO and 68/230 (29.5%) from HSCT patients. Nested PCR showed higher detection (10%) compared to DFA test (3.8%) (p < 0.001). HSCT patients presented significantly higher prevalence of HAdV infection. CONCLUSIONS: Adenovirus detection through nested-PCR assay was higher. However the inclusion of molecular method in laboratorial routine diagnostic should be evaluated considering the reality of each specific health service. .

Adolescent , Adult , Aged , Aged, 80 and over , Child , Female , Humans , Male , Middle Aged , Young Adult , Adenovirus Infections, Human/diagnosis , Respiratory Tract Infections/diagnosis , Acute Disease , Adenovirus Infections, Human/epidemiology , Adenovirus Infections, Human/immunology , Adenoviruses, Human/isolation & purification , Brazil/epidemiology , Fluorescent Antibody Technique, Direct , Immunocompetence , Immunocompromised Host , Polymerase Chain Reaction , Prevalence , Respiratory Tract Infections/epidemiology , Respiratory Tract Infections/immunology , Respiratory Tract Infections/virology