Short report: seasonal pattern of respiratory syncytial virus in a region with a tropical climate in southeastern Brazil.

Checon, Rita; Siqueira, Marilda Mendonça; Lugon, Ana Kelly; Portes, Silvana Augusta Rodrigues; Dietze, Reynaldo

doi:10.4269/ajtmh.2002.67.490

Cited by 29 publications

(31 citation statements)

References 18 publications

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“…In this study, RSV was detected from February to June (late summer to late autumn), with peak in April and May (autumn), as similarly related in Ribeirão Preto (SP) by Cintra et al (2001) and in Vitória (ES) by Checon et al (2002), and has not been detected in other months. In regions with lower temperatures during winter, such as São Paulo (Vieira et al 2001), Botucatu (Bosso et al 2004), and Porto Alegre (Strallioto et al 2001) cities, RSV circulation extended to July or August (mid-winter).…”

Section: Discussionmentioning

confidence: 54%

“…of age. Some reports have shown that the RSV is a frequent cause of acute respiratory infections in children younger than five years old, with incidence reaching 17% , 18% (Bosso et al 2003), 22% (Cintra et al 2001), and 28% (Checon et al 2002) of the investigated cases.…”

Section: Discussionmentioning

confidence: 93%

“…In spite of the fact that infants are relatively immature in their ability to mount immune response to respiratory virus infections, maternal antibodies are an important means of protection (Crowe 2001). Although Glezen et al (1981) suggested that infants with high levels of maternal RSV-neutralizing antibodies developed mild illness, lactates and young children are the groups most affected by RSV (Queiróz et al 2002, Checon et al 2002, Bosso et al 2004. Also, it still remains unclear whether the severity of RSV infection could be triggered by cross-reactivity between RSV subtype-specific maternal antibodies and a different RSV variant.…”

Section: Discussionmentioning

confidence: 99%

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Respiratory viruses in children younger than five years old with acute respiratory disease from 2001 to 2004 in Uberlândia, MG, Brazil

Costa

Yokosawa²,

Mantese³

et al. 2006

Mem. Inst. Oswaldo Cruz

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The main viruses involved in acute respiratory diseases among children are: respiratory syncytial virus (RSV), influenzavirus (FLU), parainfluenzavirus (PIV), adenovirus (AdV), human rhinovirus (HRV), and the human metapneumovirus (hMPV). The purpose of the present study was to identify respiratory viruses that affected children younger than five years old in Uberlândia, Midwestern Brazil. Nasopharyngeal aspirates from 379 children attended at Hospital de Clínicas (HC/UFU), from 2001 to 2004, with acute respiratory disease, were collected and tested by immunofluorescence assay (IFA) to detect RSV, FLU A and B, PIV 1, 2, and 3 and AdV, FLU A and B in 9.5% (36/379), PIV 1, 2 and 3 in 6.3% (24/ 379) and AdV in 3.7% (14/379). HRV were detected in 29. 6% (112/379) Viruses are the most frequent agents that cause acute respiratory infections (ARIs) and are responsible for a considerable percentage of childhood mortality (Williams et al. 2002). In Brazil, some reports from different geographical areas has revealed the viruses as the main cause of respiratory infections, as related in the cities of Fortaleza (Arruda et al. 1991), Rio de Janeiro (Nascimento et al. 1991), São Paulo (Miyao et al. 1999, Vieira et al. 2001), and Curitiba (Tsuchiya et al. 2005.The most important viruses involved in ARI are: respiratory syncytial virus (RSV), influenzaviruses types A and B (FLU A/B), parainfluenzavirus (PIV), adenovirus (AdV), human rhinovirus (HRV), and the human metapneumovirus (hMPV) (Miyao et al. 1999, Kuiken et al. 2003, Tsuchiya et al. 2005). The last one was recently identified by Hoogen et al. (2001).RSV is the main cause of viral lower respiratory tract illness in children (Miyao et al. 1999), particularly in those younger than six months old (mo.) (Queiróz et al. 2002. In addition, RSV infections are responsible for most cases of severe symptoms such as bronchiolitis with recurrent wheezing and pneumonia (Calegari et FLU is a serious public health problem worldwide, were children constitute the age group most affected (Neuzil et al. 2002). Although many infections caused by FLU could be prevented by effective vaccination program, it has been predicted that a pandemic is likely to emerge in a near future (Cox et al. 2003), caused by a virus variant not covered by the current vaccine, requiring, thus, a constant epidemiological surveillance.PIV seems to have pattern of seasonal occurrence and is considered an important cause of respiratory illnesses, particularly among young children (Monto 2002).AdV infections are common in all age groups, causing both hospital-and community-acquired epidemics. Moreover, AdV has been associated with hospitalizations of near-fatal asthma patients (Tan et al. 2003) and with cases of acute otitis media in children younger than two years old (Monobe et al. 2003).HRV is responsible for the majority of common colds during winter, causing upper respiratory infections (Arruda et al. 1991, Savolainen et al. 2003 and is considered a risk factor for acute otitis media (Monobe at al. 2003). ...

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Section: Discussionmentioning

confidence: 54%

Section: Discussionmentioning

confidence: 93%

Section: Discussionmentioning

confidence: 99%

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Respiratory viruses in children younger than five years old with acute respiratory disease from 2001 to 2004 in Uberlândia, MG, Brazil

Costa

Yokosawa²,

Mantese³

et al. 2006

Mem. Inst. Oswaldo Cruz

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“…Brazilian data about the pattern of RSV infection and circulation of the RSV groups have been obtained mostly from cities in the Southeastern, Southern and Northern regions , Mello & Silva 1992, Sutmoller et al 1995, Cintra et al 2001, Vieira et al 2001, Straliotto et al 2001, Checon et al 2002.…”

mentioning

confidence: 99%

Respiratory syncytial virus infections during an epidemic period in Salvador, Brazil: viral antigenic group analysis and description of clinical and epidemiological aspects

Moura

Borges

Portes

et al. 2003

Mem. Inst. Oswaldo Cruz

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“…These epidemics have been reported to vary according to the local, and are influenced by climatic factors variation (Checon et al 2002). Associations between respiratory viruses presence with temperature, rainfall and relative air humidity have been adopted in epidemiological studies worldwide (Viegas & Mistchenko, 2005).…”

Section: Discussionmentioning

confidence: 99%

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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Short report: seasonal pattern of respiratory syncytial virus in a region with a tropical climate in southeastern Brazil.

Cited by 29 publications

References 18 publications

Respiratory viruses in children younger than five years old with acute respiratory disease from 2001 to 2004 in Uberlândia, MG, Brazil

Respiratory viruses in children younger than five years old with acute respiratory disease from 2001 to 2004 in Uberlândia, MG, Brazil

Respiratory syncytial virus infections during an epidemic period in Salvador, Brazil: viral antigenic group analysis and description of clinical and epidemiological aspects

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

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