43 research outputs found
LITTERFALL PRODUCTION AS A FUNCTION OF PLANTING SEEDLINGS SYSTEM IN A TWO YEARS FOREST RESTORATION AREA IN THE COASTAL - PLAIN OF CARAGUATATUBA, SĂO PAULO, BRAZIL
In vitro trypanocidal activity of solamargine and extracts from Solanum palinacanthum and Solanum lycocarpum of brazilian cerrado
Cross-Protection to New Drifted Influenza A(H3) Viruses and Prevalence of Protective Antibodies to Seasonal Influenza, During 2014 in Portugal
INTRODUCTION:
Immune profile for influenza viruses is highly changeable over time. Serological studies can assess the prevalence of influenza, estimate the risk of infection, highlight asymptomatic infection rate and can also provide data on vaccine coverage. The aims of the study were to evaluate pre-existing cross-protection against influenza A(H3) drift viruses and to assess influenza immunity in the Portuguese population.
MATERIALS AND METHODS:
We developed a cross-sectional study based on a convenience sample of 626 sera collected during June 2014, covering all age groups, both gender and all administrative health regions of Portugal. Sera antibody titers for seasonal and new A(H3) drift influenza virus were evaluated by hemagglutination inhibition assay (HI). Seroprevalence to each seasonal influenza vaccine strain virus and to the new A(H3) drift circulating strain was estimated by age group, gender and region and compared with seasonal influenza-like illness (ILI) incidence rates before and after the study period.
RESULTS:
Our findings suggest that seroprevalences of influenza A(H3) (39.9%; 95% CI: 36.2-43.8) and A(H1)pdm09 (29.7%; 95% CI: 26.3-33.4) antibodies were higher than for influenza B, in line with high ILI incidence rates for A(H3) followed by A(H1)pdm09, during 2013/2014 season. Low pre-existing cross-protection against new A(H3) drift viruses were observed in A(H3) seropositive individuals (46%). Both against influenza A(H1)pdm09 and A(H3) seroprotection was highest in younger than 14-years old. Protective antibodies against influenza B were highest in those older than 65years old, especially for B/Yamagata lineage, 33.3% (95% CI: 25.7-41.9). Women showed a high seroprevalence to influenza, although without statistical significance, when compared to men. A significant decreasing trend in seroprotection from north to south regions of Portugal mainland was observed.
CONCLUSIONS:
Our results emphasize that low seroprotection increases the risk of influenza infection in the following winter season. Seroepidemiological studies can inform policy makers on the need for vaccination and additional preventive measures.info:eu-repo/semantics/publishedVersio
Ăndice de alimentação saudĂĄvel para gestantes: adaptação para uso em gestantes brasileiras
A relação entre o desenvolvimento fonológico e aprendizagem inicial da escrita em diferentes contextos socioeducacionais
Observation of a New Excited Beauty Strange Baryon Decaying to Îb- Ï+Ï-
The Îb-Ï+Ï- invariant mass spectrum is investigated with an event sample of proton-proton collisions at s=13 TeV, collected by the CMS experiment at the LHC in 2016-2018 and corresponding to an integrated luminosity of 140 fb-1. The ground state Îb- is reconstructed via its decays to J/ÏÎ- and J/ÏÎK-. A narrow resonance, labeled Îb(6100)-, is observed at a Îb-Ï+Ï- invariant mass of 6100.3±0.2(stat)±0.1(syst)±0.6(Îb-) MeV, where the last uncertainty reflects the precision of the Îb- baryon mass. The upper limit on the Îb(6100)- natural width is determined to be 1.9 MeV at 95% confidence level. The low Îb(6100)- signal yield observed in data does not allow a measurement of the quantum numbers of the new state. However, following analogies with the established excited Îc baryon states, the new Îb(6100)- resonance and its decay sequence are consistent with the orbitally excited Îb- baryon, with spin and parity quantum numbers JP=3/2-