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Distribution of HBV subgenotypes in Ribeirão Preto, Southeastern Brazil: a region with history of intense Italian immigration

Overview of attention for article published in Brazilian Journal of Infectious Diseases, May 2017
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Title
Distribution of HBV subgenotypes in Ribeirão Preto, Southeastern Brazil: a region with history of intense Italian immigration
Published in
Brazilian Journal of Infectious Diseases, May 2017
DOI 10.1016/j.bjid.2017.01.011
Pubmed ID
Authors

Silvana Gama Florencio Chachá, Michele Soares Gomes-Gouvêa, Fernanda de Mello Malta, Sandro da Costa Ferreira, Márcia Guimarães Villanova, Fernanda Fernandes Souza, Andreza Correa Teixeira, Afonso Dinis da Costa Passos, João Renato Rebello Pinho, Ana de Lourdes Candolo Martinelli

Abstract

Hepatitis B virus (HBV) is distributed worldwide, with geographical variations regarding prevalence of the different genotypes. The aim of this study was to determine the HBV genotypes and subgenotypes circulating in Southeast Brazil and compare the genetic sequences found with HBV sequences previously described in the world. Sequences from 166 chronic HBV carriers were analyzed using the fragment constituted by 1306 base pairs comprising surface and polymerase regions of the HBV genome. The sequences obtained were submitted to phylogenetic analysis. HBV subgenotypes A1, A2, D1-D4, F2a, and F4 were found. HBV genotype D was the most frequent, found in 99 patients (58.4%). Within this group, subgenotype D3 was the most prevalent, in 73 patients (42.9%). HBV genotype A was identified in 58 (36%) patients, subgenotype A1, in 48 (29.8%) subjects. Genotype F was identified in 9 (5.4%). According to the phylogenetic analysis, the sequences found were grouped with sequences from Europe, Asia and Middle East (subgenotypes D1, D2, D3) and sequences from Latin America and Africa (subgenotype A1). HBV D3 grouped in different clusters inside D3 clade, several of them with sequences isolated in Italy. We also identified eight families whose relatives were infected with the same HBV subgenotype, most with high similarity between sequences. In conclusion, the distribution of the HBV sequences obtained interweaved with sequences from other continents, corresponding to regions from where many immigrants came to this region, in accordance to the hypothesis that the HBV detected over there were brought during the colonization times.

Twitter Demographics

The data shown below were collected from the profiles of 2 tweeters who shared this research output. Click here to find out more about how the information was compiled.

Mendeley readers

The data shown below were compiled from readership statistics for 32 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 32 100%

Demographic breakdown

Readers by professional status Count As %
Researcher 6 19%
Other 5 16%
Student > Master 3 9%
Student > Bachelor 3 9%
Professor 2 6%
Other 8 25%
Unknown 5 16%
Readers by discipline Count As %
Biochemistry, Genetics and Molecular Biology 8 25%
Medicine and Dentistry 4 13%
Agricultural and Biological Sciences 4 13%
Nursing and Health Professions 2 6%
Immunology and Microbiology 2 6%
Other 2 6%
Unknown 10 31%

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 10 May 2017.
All research outputs
#7,547,936
of 9,792,785 outputs
Outputs from Brazilian Journal of Infectious Diseases
#159
of 241 outputs
Outputs of similar age
#188,052
of 263,519 outputs
Outputs of similar age from Brazilian Journal of Infectious Diseases
#8
of 16 outputs
Altmetric has tracked 9,792,785 research outputs across all sources so far. This one is in the 13th percentile – i.e., 13% of other outputs scored the same or lower than it.
So far Altmetric has tracked 241 research outputs from this source. They receive a mean Attention Score of 2.2. This one is in the 21st percentile – i.e., 21% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 263,519 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 16th percentile – i.e., 16% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 16 others from the same source and published within six weeks on either side of this one. This one is in the 6th percentile – i.e., 6% of its contemporaries scored the same or lower than it.