acute lower respiratory infections due to respiratory syncytial virus and adenovirus among hospitalized children from argentina.acute lower respiratory infection (alri) is one of the main causes of morbidity and mortality in small children.19989645999
multicentered study of viral acute lower respiratory infections in children from four cities of argentina, 1993-1994.this study describes the first multicentered study of acute lower respiratory infection viral etiology in young children from four different geographical areas of argentina. a total of 1,278 children under 5 years of age, hospitalized in primary care centers from buenos aires, córdoba, santa fé and mar del plata cities during a 2-year period were studied (1993-1994). nasopharyngeal aspirates were investigated for respiratory syncytial virus (rsv), adenovirus, parainfluenza, and influenza a and b ...200111360249
evidence of human metapneumovirus in children in argentina.human metapneumovirus (hmpv) is a virus, which was first associated with acute lower respiratory infection in children but is detected currently in all age groups. clinical symptoms are similar to those described for respiratory syncytial virus (rsv) infections, ranging from mild respiratory illness to severe bronchiolitis and pneumonia in children. to date, no cases of hmpv have been reported in argentina. in this study, 440 respiratory samples obtained during the period 1998-2002 from children ...200414695673
differential production of inflammatory cytokines in primary infection with human metapneumovirus and with other common respiratory viruses of infancy.viral respiratory infections are the most frequent cause of hospital admission for infants and young children during winter. however, the mechanisms of illness that are associated with viral lower-respiratory-tract infection (lri) are unclear. a widely accepted hypothesis attributes the pathogenesis of viral lri in infants to the induction of innate inflammatory responses. this theory is supported by studies showing that toll-like receptor 4 is activated by respiratory syncytial virus (rsv), lea ...200415143472
intragroup antigenic diversity of human respiratory syncytial virus (group a) isolated in argentina and chile.the intragroup antigenic diversity of the g glycoprotein of 226 human respiratory syncytial virus (hrsv) strains isolated in buenos aires (argentina) and santiago (chile) between 1995 and 2002 was evaluated by elisa with a panel of 14 anti-g monoclonal antibodies (mabs). out of 226 strains characterized, 172 (76%) belonged to group a and 54 (24%) to group b. strains from both groups cocirculated throughout the study period in both countries, except in 1996, 2000, and 2002 when only group a strai ...200516121383
the impact of infection with human metapneumovirus and other respiratory viruses in young infants and children at high risk for severe pulmonary disease.we conducted a prospective, observational study to characterize the clinical manifestations of respiratory infections caused by human metapneumovirus (hmpv) and other viruses in 194 premature infants and young children with chronic lung disease or congenital heart disease in buenos aires. children had 567 episodes of respiratory illness and were monitored until they were 2 years old or until the completion of the study. hmpv elicited 12 infections (2%) year-round; 30% were of moderate or greater ...200616652283
epidemiological study of influenza virus infections in young adult outpatients from buenos aires, argentina.influenza virus is the most common cause of influenza-like illness (ili) in adults. in argentina, studies on influenza and other respiratory viruses were performed mostly in pediatric populations.200819453464
health evaluation of pampas deer (ozotoceros bezoarticus celer) at campos del tuyú wildlife reserve, argentina.samples from 14 free-ranging pampas deer (ozotoceros bezoarticus celer) were collected in 1995 and 1998, at campos del tuyú wildlife reserve, buenos aires, argentina. hematology, serum chemistries, minerals and metals, and fecal parasites were analyzed. in addition, fecal ova and parasites were evaluated seasonally during 1998-2000. serology for infectious diseases included blue-tongue, brucellosis, bovine respiratory syncytial virus infection, bovine viral diarrhea/mucosal disease, infectious b ...200314733285
antigenic and genetic variability of human respiratory syncytial viruses (group a) isolated in uruguay and argentina: 1993-2001.the antigenic and genetic diversity of g glycoprotein from 25 human respiratory viruses (group a) isolated during nine consecutive epidemics (1993-2001) in montevideo, uruguay, and 7 strains isolated in buenos aires, argentina, in the same period were analyzed. genetic variability was evaluated by partial sequence of the g protein gene. phylogenetic analysis indicated that most uruguayan and argentinean group a isolates clustered into three genotypes: ga5, ga2, and ga1. some strains clustered in ...200312938207
molecular epidemiology of human respiratory syncytial virus subgroup a over a six-year period (1999-2004) in argentina.human respiratory syncytial virus (hrsv) is the main viral cause of acute lower respiratory tract infections in children. little information about the molecular epidemiology of hrsv in developing countries, such as argentina, is available. by rt-pcr, we subgrouped 353 hrsv isolates over six consecutive epidemic seasons (1999-2004) and few isolates from 1997. between them, 232 (65.7%) belonged to subgroup a and 121 (34.3%) to subgroup b. therefore, the nucleotide, amino-acid variability and phylo ...200516121371
genetic and antigenic variability of human respiratory syncytial virus (groups a and b) isolated over seven consecutive seasons in argentina (1995 to 2001).the genetic and antigenic variability of human respiratory syncytial virus (hrsv) strains isolated in buenos aires from 1995 to 2001 was evaluated by partial nucleotide sequencing of the g gene and enzyme-linked immunosorbent assay analysis with anti-g monoclonal antibodies. phylogenetic analyses showed that 37 group a strains clustered into five genotypes, whereas 20 group b strains clustered into three genotypes. group a showed more genetic variability than group b. a close correlation between ...200515872254
natural history of human respiratory syncytial virus inferred from phylogenetic analysis of the attachment (g) glycoprotein with a 60-nucleotide duplication.a total of 47 clinical samples were identified during an active surveillance program of respiratory infections in buenos aires (ba) (1999 to 2004) that contained sequences of human respiratory syncytial virus (hrsv) with a 60-nucleotide duplication in the attachment (g) protein gene. this duplication was analogous to that previously described for other three viruses also isolated in buenos aires in 1999 (a. trento et al., j. gen. virol. 84:3115-3120, 2003). phylogenetic analysis indicated that b ...200616378999
[acute viral respiratory infection in children under 5 years: epidemiological study in two centers in buenos aires, argentina].introduction. acute respiratory infections (ari) are a major cause of hospitalization particularly at the extreme ages of life. objectives. to determine the viral diagnosis in children < 5 years old with ari, seasonality, clinical and epidemiological characteristics. population and methods. a cross-sectional, descriptive and multicenter study was performed. respiratory samples from patients with ari hospitalized or outpatients with < 5 days of respiratory symptoms from june 2008 to may 2009 were ...201121829870
Displaying items 1 - 13 of 13