The expression of ABH and Lewis antigens in Brazilian semi-isolated Black communities

• Autor(a) principal: CORVELO, Tereza Cristina de Oliveira
• Data de Publicação: 2002
• Outros Autores: AGUIAR, Délia Cristina Figueira, SAGICA, Fernanda do Espírito Santo
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFPA
• Texto Completo: http://repositorio.ufpa.br/jspui/handle/2011/6165
• topic: Antígenos de grupo sanguíneo; Sistema Lewis; Sistema do grupo sanguíneo de Lewis; Sistema do grupo sanguíneo ABH; Negro (Raça); Cametá - PA; Alcântara - MA; Pará - Estado; Maranhão - Estado; Amazônia brasileira

The expression of the ABH and Lewis blood groups was determined in blood and saliva samples from two semi-isolated Black communities of Northern Brazil: Cametá and Alcântara. The distributions of ABO blood group phenotypes and the ABH secretor status frequencies showed no significant differences between these populations. In contrast, there was a difference regarding the frequency of the red blood cell Le(a-b-) phenotypes, associated with erythrocyte/saliva discordance, as confirmed by the observation that individuals with Le(a-b-) red cells have the Lewis antigen in their saliva, resulting in a nongenuine Le(a-b-) phenotype, whose frequency was higher in Alcântara.