Seasonality of viral respiratory infections in Southeast of Brazil: the influence of temperature and air humidity

Gardinassi, Luiz Gustavo; Simas, Paulo Vitor Marques; Salomão, João Batista; Durigon, Edison Luiz; Trevisan, Dirce Maria Zanetta; Cordeiro, José Antônio; Lacerda, Mauricio Nogueira; Rahal, Paula; Souza, Fátima Pereira de

doi:10.1590/s1517-83822012000100011

Cited by 36 publications

(27 citation statements)

References 35 publications

(11 reference statements)

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“…From July 2003 to April 2004, this pathogen was mainly detected and isolated on winter and spring seasons, while in 2005, outbreaks were observed in late autumn and winter seasons. These results contrasts with the previously reported HRSV frequency of 29% [29], detected between May 2004 and September 2005 in clinical samples derived from the hospital, which was composed of 272 children including 57% male and 43% female, whose ages varied between 1 to 68 months. HRSV hospital outbreaks were observed in winter and spring 2004 and autumn 2005 [29].…”

Section: Resultscontrasting

confidence: 99%

Diversity and Adaptation of Human Respiratory Syncytial Virus Genotypes Circulating in Two Distinct Communities: Public Hospital and Day Care Center

Gardinassi

Simas

Gomes

et al. 2012

Viruses

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HRSV is one of the most important pathogens causing acute respiratory tract diseases as bronchiolitis and pneumonia among infants. HRSV was isolated from two distinct communities, a public day care center and a public hospital in São José do Rio Preto – SP, Brazil. We obtained partial sequences from G gene that were used on phylogenetic and selection pressure analysis. HRSV accounted for 29% of respiratory infections in hospitalized children and 7.7% in day care center children. On phylogenetic analysis of 60 HRSV strains, 48 (80%) clustered within or adjacent to the GA1 genotype; GA5, NA1, NA2, BA-IV and SAB1 were also observed. SJRP GA1 strains presented variations among deduced amino acids composition and lost the potential O-glycosilation site at amino acid position 295, nevertheless this resulted in an insertion of two potential O-glycosilation sites at positions 296 and 297. Furthermore, a potential O-glycosilation site insertion, at position 293, was only observed for hospital strains. Using SLAC and MEME methods, only amino acid 274 was identified to be under positive selection. This is the first report on HRSV circulation and genotypes classification derived from a day care center community in Brazil.

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Section: Resultscontrasting

confidence: 99%

Diversity and Adaptation of Human Respiratory Syncytial Virus Genotypes Circulating in Two Distinct Communities: Public Hospital and Day Care Center

Gardinassi

Simas

Gomes

et al. 2012

Viruses

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“…In this study, RSV circulation showed an alternated pattern of incidence into the population during the years of study, a pattern that was also observed in other studies (Gardinassi et al, 2012 (Bonfim et al, 2011).…”

Section: Discussionsupporting

confidence: 89%

“…In developing countries, laboratorial tests for identification of virus which cause these infections are not available (D'Ellia et al 2005). However, it has been reported advances on the epidemiological knowledge of these infections in Brazil, mainly due to studies performed at Brazilian university hospitals (Salomão Junior et al, 2011;Gardinassi et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

“…Many climatic factors have been reported to influence the seasonal RSV distribution in Brazil (Gardinassi, et al 2012), among them, there are several variations of temperature, rainfall and relative air humidity throughout the year (Moura et al 2006). Despite the peaks of respiratory viral infection, in South America, occur mostly in the autumn and winter (Vieira et al 2001), in Brazil, RSV seasonality has differences depending on the geographical region.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Climatic Factors Impact on RSV Infection Distribution in Children Attending Childcare at Northwest Region of São Paulo, Brazil

Simas¹,

Gardinassi²,

Nogueira³

et al. 2012

VR&R

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Respiratory syncytial virus (RSV) was detected in samples collected from children from 0 to 6 years of age with acute respiratory infection, attending public childcare on Northwest region of São Paulo, Brazil. RSV distribution was associated to seasonal climatic variables as temperature, rainfall and relative air humidity. We utilized samples of nasopharyngeal aspirate collected during the period of July 2003 to September 2005. RT-PCR was the chosen method for viral identification. Results showed that from the 817 samples (collected from 179 children), 7.7% (63/817) were RSV positive. In 2003, RSV was detected from July until October. In 2004, RSV infections occurred in March, May, June, July, October, November, and December. In 2005, RSV was detected in March, April, May, August, and September. RSV circulation patterns in childcare children showed seasonal distribution associated to decreases in temperature and relative air humidity. RSV was detected in childcare children as an important viral agent causing respiratory infections, with varying patterns of circulation into the cohort during the study period. Moreover, RSV distribution showed to be associated with the dry season on Northwest region of São Paulo, Brazil.

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“…Se observó que el VPI circula principalmente entre otoño y primavera, con pocos casos detectados en verano. Este patrón también se observó en un estudio realizado en otra ciudad del Estado de São Paulo 13 . A pesar de la mayor circulación en otoño (marzo-junio) y en invierno (junio-septiembre), no se observó un patrón estacional específico lo que podría influir de alguna manera en el diagnóstico.…”

Section: Discussionunclassified

Detección de virus parainfluenza en pacientes inmunocomprometidos e inmunocompetentes atendidos en un hospital terciario de la Ciudad de São Paulo, Brasil

Parmezan¹,

Camargo²,

Watanabe³

et al. 2016

Rev. chil. infectol.

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Seasonality of viral respiratory infections in Southeast of Brazil: the influence of temperature and air humidity

Abstract: ABSTRACT

Cited by 36 publications

References 35 publications

Diversity and Adaptation of Human Respiratory Syncytial Virus Genotypes Circulating in Two Distinct Communities: Public Hospital and Day Care Center

Diversity and Adaptation of Human Respiratory Syncytial Virus Genotypes Circulating in Two Distinct Communities: Public Hospital and Day Care Center

Analysis of Climatic Factors Impact on RSV Infection Distribution in Children Attending Childcare at Northwest Region of São Paulo, Brazil

Detección de virus parainfluenza en pacientes inmunocomprometidos e inmunocompetentes atendidos en un hospital terciario de la Ciudad de São Paulo, Brasil

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