Occurrence of influenza B/Hong Kong-Like strains in Brazil, during 2002

Paiva, Terezinha Maria de; Ishida, María Akíko; Goncalves, Maria Gissele; Benega, Margareth Aparecida; Souza, Maria Candida Oliveira De; Cruz, Ana M.

doi:10.1590/s0036-46652003000100011

Cited by 8 publications

(8 citation statements)

References 2 publications

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“…These sources encompassed a total of 483 130 samples from patients diagnosed with influenza or ILI. Seven studies were excluded due to duplication of information with the FluNet, 37–39 GROG, 40–42 or due to the recruitment date being prior to 1995 43 …”

Section: Resultsmentioning

confidence: 99%

Burden of influenza in Latin America and the Caribbean: a systematic review and meta‐analysis

Savy

Ciapponi

Bardach

et al. 2012

Influenza Resp Viruses

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Please cite this paper as: Savy et al. (2012) Burden of influenza in Latin America and the Caribbean: a systematic review and meta‐analysis. Influenza and Other Respiratory Viruses DOI: 10.1111/irv.12036. Objective Influenza causes severe morbidity and mortality. This systematic review aimed to assess the incidence, etiology, and resource usage for influenza in Latin America and the Caribbean. Design Meta‐analytic systematic review. Arcsine transformations and DerSimonian Laird random effects model were used for meta‐analyses. Setting A literature search from 1980 to 2008 in MEDLINE, Cochrane Library, EMBASE, LILACS, Ministries of Health, PAHO, proceedings, reference lists, and consulting experts. Sample We identified 1092 references, of which 31 were finally included, in addition to influenza surveillance reports. We also used information from the 10 reports from the collaborative group for epidemiological surveillance of influenza and other respiratory virus (GROG), and information retrieved from the WHO global flu database FLUNET. Main outcome measures Incidence, percentage of influenza specimens out of the total received by influenza centers and resource‐use outcomes. Results A total of 483 130 specimens of patients with influenza were analyzed. Meta‐analysis showed an annual rate of 36 080 (95%CI 28 550 43 610) influenza‐like illness per 100 000 persons‐years. The percentage of influenza out of total specimens received by influenza centers ranged between 4.66% and 15.42%, with type A the most prevalent, and A subtype H3 predominating. The mean length of stay at hospital due to influenza ranged between 5.8 12.9 days, total workdays lost due to influenza‐like illnesses were 17 150 days, and the mean direct cost of hospitalization was US$575 per laboratory‐confirmed influenza case. Conclusions Our data show that seasonal influenza imposes a high morbidity and economic burden to the region. However, the vaccine‐uptake rate has been low in this region. Population‐based cohort studies are required to improve the knowledge about incidence and resource utilization, which would inform healthcare authorities for decision making.

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Section: Resultsmentioning

confidence: 99%

Burden of influenza in Latin America and the Caribbean: a systematic review and meta‐analysis

Savy

Ciapponi

Bardach

et al. 2012

Influenza Resp Viruses

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“…Meanwhile, a higher incidence of FLUB over FLUA was observed in 2002. In the same period, through the sponsorship of the Brazilian Ministry of Health, Paiva et al (2002) described an outbreak of FLUB/Hong Konglike strain in Brazil. This virus strain was identified in the South, South-east, Centre-East and Northern regions of the country.…”

Section: Discussionmentioning

confidence: 99%

The epidemiology and antigenic characterization of influenza viruses isolated in Curitiba, South Brazil

Vidal

Siqueira

Nogueira³

et al. 2008

Mem. Inst. Oswaldo Cruz

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Several studies conducted all over the world have reported that the influenza virus is associated with great morbidity and mortality rates. In this study, we analyzed the incidence of the influenza virus between 2000 and 2003 in Curitiba. We studied 1621 samples obtained from outpatients and hospitalized patients of both sexes and all ages. The study was conducted at the local primary care health units (outpatients) and at the tertiary care unit (hospitalized) of the General Hospital of the Federal University in the state of Paraná, Brazil. Nasopharyngeal aspirates and, eventually, bronchoalveolar lavage were assayed for the presence of viral antigens, either by indirect immunofluorescence or cell culture. Of the samples studied, 135 (8.3%) were positive for influenza virus, and of those, 103 (76.3%) were positive for type A and 32 (23.7%) for type B. Additionally, positive samples were analyzed by reverse transcription followed by polymerase chain reaction and subtypes H1 and H3 were identified from this group. A high incidence of positive samples was observed mainly in the months with lower temperatures. Furthermore, outpatients showed a higher incidence of influenza viruses than hospitalized patients.

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“…However, results indicate the need for further studies on the region, especially the evaluation for virus activity with virus isolation and characterization, as knowing the virus dynamics and capability to infect mammals and birds (Brown, 2004), including the triad human, swine and birds, with a role on the formation of new viable recombinant strains (Jong et al, 2000). AIV-A in birds may be associated with infection in mammals, including humans and importantly swine Schaefer et al (2015), and has been demonstrated in Brazil (Paiva et al, 2003). AIV-A infection in family poultry may have a role in the generation of virus diversity, by mutation or recombination, potentially adding to public health concern and risk to the industrial poultry.…”

Section: Discussionmentioning

confidence: 99%

Serological Diagnosis of Influenza A Subtype H1 on Family Poultry of Belo Horizonte, Minas Gerais and Santa Maria, Rio Grande Do Sul, in Brazil.

Filho

Torres

Marin

et al. 2018

Braz. J. Poult. Sci.

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Serum samples (n=687) from Gallus gallus domesticus were collected for the investigation of antibodies to avian influenza virus (AIV-A) in the family poultry of the surrounding counties of Santa Maria/RS and the metropolitan region of Belo Horizonte/MG, totaling twenty different counties. Additional samples of seventeen (n=17) free-flying ducks (C. moschata pure or hybrid with Anas platyrhynchos) were collected in Belo Horizonte. The chosen tests for the survey were performed as described by the World Organization for Animal Health (OIE), including agar gel immunodiffusion (AGID) for antibodies to AIV-A nucleoprotein (N) and haemagglutination-inhibition (HI) for antibodies to subtype H1. Out of the 704 serum tests performed by AGID, eight (8/704) were revealed positive for antibodies to AIV-A N protein, with six (6/704) retested positive for subtype H1. Two sera tested positive by AGID were shown to be non reactive to the H1 subtype, suggesting specificity to another subtype. A low occurrence of antibodies to influenza A (1.13%) was found, and mostly (75%) specific to subtype H1. This represents an approximately 0,85% overall occurrence for subtype H1 antibodies, with an unknown subtype specific antibodies detected in one free-flying anatid. The low occurrence of antibodies in the family poultry may suggest a low AIV-A activity during the period of study, information which remains to be confirmed by virus detection.

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Occurrence of influenza B/Hong Kong-Like strains in Brazil, during 2002

Abstract: SUMMARY

Cited by 8 publications

References 2 publications

Burden of influenza in Latin America and the Caribbean: a systematic review and meta‐analysis

Burden of influenza in Latin America and the Caribbean: a systematic review and meta‐analysis

The epidemiology and antigenic characterization of influenza viruses isolated in Curitiba, South Brazil

Serological Diagnosis of Influenza A Subtype H1 on Family Poultry of Belo Horizonte, Minas Gerais and Santa Maria, Rio Grande Do Sul, in Brazil.

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