Navegando por Autor "PEREIRA, Luciana Maria Cunha Maradei"

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Acesso aberto (Open Access)
Carga proviral do HTLV-1 e HTLV-2: um método simples através da PCR quantitativa em tempo real
(2006-12) TAMEGÃO-LOPES, Bruna Pedroso; REZENDE, Priscila Rocha de; PEREIRA, Luciana Maria Cunha Maradei; LEMOS, José Alexandre Rodrigues de
When the human T cell lymphotropic virus (HTLV) is integrated with the host cell genome (provirus), its proviral DNA is a replication marker. Proviral load appears to be an important factor in the development of diseases related to these retroviruses. In this study, a methodology for absolute quantification of the HTLV-1 and HTLV-2 proviral load using real-time PCR was developed. Fifty-three blood donor samples with positive ELISA test result were subjected to this methodology, which utilized the TaqMan® system for three target sequences: HTLV-1, HTLV-2 and albumin. The absolute proviral load was quantified using the relative ratio between the HTLV genome and the host cell genome, taking into consideration the white blood cell count. The method presented is sensitive (215 copies/ml), practical and simple for proviral quantification, and is efficient and appropriate for confirming and discriminating infections according to viral type.
Acesso aberto (Open Access)
HCV infection through perforating and cutting material among candidates for blood donation in Belém, Brazilian Amazon
(Universidade Federal do Pará, 2014-12) VALOIS, Rubenilson Caldas; PEREIRA, Luciana Maria Cunha Maradei; CRESCENTE, Jose Angelo Barletta; OLIVEIRA FILHO, Aldemir Branco de; LEMOS, José Alexandre Rodrigues de
This study evaluated epidemiological factors for HCV infection associated with sharing perforating and cutting instruments among candidates for blood donation (CBD) in the city of Belém, Pará, Brazilian Amazon. Two definitions of HCV infection cases were used: anti-HCV positivity shown by EIA, and HCV-RNA detection by PCR. Infected and uninfected CBD completed a questionnaire about possible risk factors associated with sharing perforating and cutting instruments. The information was evaluated using simple and multiple logistic regressions. Between May and November 2010, 146 (1.1%) persons with anti-HCV antibodies and 106 (0.8%) with HCV-RNA were detected among 13,772 CBD in Belém. Risk factors associated with HCV infection based on the EIA (model 1) and PCR (model 2) results were: use of needles and syringes sterilized at home; shared use of razors at home, sharing of disposable razors in barbershops, beauty salons etc.; and sharing manicure and pedicure material. The models of HCV infection associated with sharing perforating and cutting instruments should be taken into account by local and regional health authorities and by those of other countries with similar cultural practices, in order to provide useful information to guide political and public strategies to control HCV transmission.
Acesso aberto (Open Access)
Sensibilidade da técnica de reação em cadeia da polimerase para HIV-1 em relação à técnica de ensaio imunoenzimático
(2002-03) REZENDE, Priscila Rocha de; ALVES, Giselle Bastos; PEREIRA, Luciana Maria Cunha Maradei; VALE, Teonice Joaquina Lima; PIMENTA, Adriana do Socorro Coelho; LEMOS, José Alexandre Rodrigues de
O vírus da imunodeficiência humana (HIV) é o agente etiológico da Síndrome da Imunodeficiência Adquirida, AIDS, uma doença de grande preocupação médica. O genoma deste vírus encontra-se arranjado em nove genes individuais e por duas estruturas idênticas denominadas de repetições terminais nas extremidades 5' e 3'. Tivemos como objetivo analisar a sensibilidade do teste da reação em cadeia da polimerase (PCR) e o teste de ensaio imunoenzimático (ELISA), como teste para triagem de doadores de sangue para HIV. Foram analisadas 200 amostras de doadores e pacientes, da Fundação HEMOPA, com padrão positivo e indeterminado no teste ELISA. Na triagem sorológica pelo ELISA tiveram como resultado 35 amostras positivas, 75 amostras negativas e 90 amostras indeterminadas as quais foram submetidas ao teste pela PCR. Vinte e cinco amostras tiveram resultado positivo e 175 amostras negativas. Com estes resultados concluímos que a reação de PCR apresenta-se positiva somente nas amostras em que o teste ELISA apresenta relação DO/cutoff, acima de 3.