Seasonal patterns of viral and bacterial infections among children hospitalized with community-acquired pneumonia in a tropical region


Autoria(s): NASCIMENTO-CARVALHO, Cristiana M.; CARDOSO, Maria-Regina A.; BARRAL, Aldina; ARAUJO-NETO, Cesar A.; OLIVEIRA, Juliana R.; SOBRAL, Luciana S.; SAUKKORIIPI, Annika; PALDANIUS, Mika; VAINIONPAA, Raija; LEINONEN, Maija; RUUSKANEN, Olli
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

19/10/2012

19/10/2012

2010

Resumo

Community-acquired pneumonia (CAP) is a common cause of morbidity among children. Evidence on seasonality, especially on the frequency of viral and bacterial causative agents is scarce; such information may be useful in an era of changing climate conditions worldwide. To analyze the frequency of distinct infections, meteorological indicators and seasons in children hospitalized for CAP in Salvador, Brazil, nasopharyngeal aspirate and blood were collected from 184 patients aged < 5 y over a 21-month period. Fourteen microbes were investigated and 144 (78%) cases had the aetiology established. Significant differences were found in air temperature between spring and summer (p = 0.02) or winter (p < 0.001), summer and fall (p = 0.007) or winter (p < 0.001), fall and winter (p = 0.002), and on precipitation between spring and fall (p = 0.01). Correlations were found between: overall viral infections and relative humidity (p = 0.006; r = 0.6) or precipitation (p = 0.03; r = 0.5), parainfluenza and precipitation (p = 0.02; r = -0.5), respiratory syncytial virus (RSV) and air temperature (p = 0.048; r = -0.4) or precipitation (p = 0.045; r = 0.4), adenovirus and precipitation (p = 0.02; r = 0.5), pneumococcus and air temperature (p = 0.04; r = -0.4), and Chlamydia trachomatis and relative humidity (p = 0.02; r = -0.5). The frequency of parainfluenza infection was highest during spring (32.1%; p = 0.005) and that of RSV infection was highest in the fall (36.4%; p < 0.001). Correlations at regular strength were found between several microbes and meteorological indicators. Parainfluenza and RSV presented marked seasonal patterns.

Fundacao de Amparo a Pesquisa no Estado da Bahia (FAPESB), Salvador, Brazil

Paediatric Research Foundation, Helsinki, Finland

Identificador

SCANDINAVIAN JOURNAL OF INFECTIOUS DISEASES, v.42, n.11/Dez, p.839-844, 2010

0036-5548

http://producao.usp.br/handle/BDPI/26517

10.3109/00365548.2010.498020

http://dx.doi.org/10.3109/00365548.2010.498020

Idioma(s)

eng

Publicador

INFORMA HEALTHCARE

Relação

Scandinavian Journal of Infectious Diseases

Direitos

restrictedAccess

Copyright INFORMA HEALTHCARE

Palavras-Chave #RESPIRATORY SYNCYTIAL VIRUS #DEVELOPING-WORLD #DIAGNOSIS #BRAZIL #SURVEILLANCE #MORTALITY #ASSAYS #Infectious Diseases
Tipo

article

original article

publishedVersion