Navegando por Autor "ALMEIDA, Danilo de Souza"

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Acesso aberto (Open Access)
Moderada endemicidade da infecção pelo vírus linfotrópico-T humano na região metropolitana de Belém, Pará, Brasil
(Universidade Federal do Pará, 2018-10) SILVA, Ingrid Christiane; PINHEIRO, Bruna Teles; NOBRE, Akim Felipe Santos; COELHO, Jaciana Lima; PEREIRA, Cássia Cristine Costa; COVRE, Louise de Souza Canto; ALMEIDA, Camila Pâmela Santos de; VIANA, Maria de Nazaré do Socorro de Almeida; ALMEIDA, Danilo de Souza; RIBEIRO, Jairo Falcão; SANTOS, Yago Costa Vasconcelos dos; ARAÚJO, Marcos William Leão de; BORGES, Mariza da Silva; NASCIMENTO, Lisandra Duarte; VALENTIM, Lorena Saldanha; CASSEB, Jorge Simao do Rosario; COSTA, Carlos Araujo da; SOUSA, Maisa Silva de
The spread of the HTLV infection in families living in the metropolitan area of Belém, Pará, Brazil, and the lack of studies in the general population requires studies to better understand its prevalence in the region. Methods: An anti-HTLV-1/HTLV-2 antibodies test was carried out on random adults in public places in Belém between November 2014 and November 2015. A proviral DNA test detected if the person was infected, and then a clinical evaluation and an intrafamilial investigation were carried out. Results: Of the 1059 individuals being investigated, 21 (2.0%) had seroreagent samples, 15 (1.4%) had HTLV-1, 5 (0.5%) had HTLV-2, and proviral DNA was undetectable in one case. The mean age of the infected people (57.2) was higher than that of those that were uninfected (46.2) (p = 0.0010). The prevalence of infection increased with age, especially in individuals with a family income equal to or less than a minimum wage. Intrafamilial transmission seems to have occurred in all of the families being studied. Among the patients with HTLV-1, 30% (3/10) already had some symptom related to the infection. Discussion: The increase in prevalence rates according to age may be due to late seroconversion of a previously acquired infection, or the cumulative risk of new infections, especially in women. Conclusion: There was a moderate prevalence of the HTLV infection among adult individuals from the metropolitan area of Belém, with a predominance of HTLV-1. This infection was associated with low income and increasingly older women. It also presented intrafamily spread and negligence in the diagnosis of associated diseases.
Acesso aberto (Open Access)
Transmissão intrafamiliar do Vírus linfotrópico de Células T Humanas tipo 1 em Belém, Pará, Brasil
(Universidade Federal do Pará, 2012) ALMEIDA, Danilo de Souza; SOUSA, Maisa Silva de; http://lattes.cnpq.br/1775363180781218
Retroviruses belong to a group of infectious agents that have received more attention from the scientific community since the early 19706, when cellular oncogenes have been reported related to them. From these preliminary studies it was described the first human retrovirus, virus Human T lymphotropic 1 (HTLV-1)20. Besides the leukemia/lymphoma adult T cell, HTLV-1 is also causing a degenerative neurological disease associated myelopathy tropical spastic HTLV-1/paraparesia (HAM / TSP) 7, 21. Blood samples from patients and their families living with the virus, seen in the NMT/UFPA were analyzed by molecular method, aiming to investigate the intrafamilial transmission of HTLV-1. Intrafamilial transmission was observed with 100% similarity between the nucleotide bases in nine (75%) of the 12 families studied, of which two families showed vertical transmission, sexual transmission had three families and three families who had both types of transmission. It was observed that three families change occurred in more than one nucleotide base pair, and in two families diverged by 0.2% and 0.4%, ie, had high similarity between their nucleotides (> 99.4 %), suggesting that in this case there intrafamilial transmission of HTLV-1. In one family there was a difference of 1.83%, indicating no intrafamilial transmission. The nucleotide sequence of the 5 'LTR segment and phylogenetic analysis showed high similarity entres the strains isolated in this study and confirmed the occurrence of the Cosmopolitan subtype Transcontinental subgroup. This study provides molecular evidence of intrafamilial transmission of HTLV-1 in patients treated at the Tropical Medicine Center UFPA. In this study the routes of transmission as breastfeeding and sex, was more prevalent for this spread.