title: Ethnic admixture composition of two western Amazonian populations.
abstract: A small riverine community, Portuchuelo (8 degrees 37'S, 63 degrees 49'W), and a rural county, Monte Negro (10 degrees 15'S, 63 degrees 18'W), both in the state of Rondĵnia, Brazil, were studied for the purposes of ascertaining health conditions and the causes of the variability of some infectious diseases. The sample included 181 inhabitants of Portuchuelo and 924 of Monte Negro. Data on 11 blood polymorphisms (ABO, Rh, MNSs, Kell, Fy, haptoglobin, hemoglobin, ACP1, PGM1, GLO1, and CA2) were used to determine the ethnic composition of the inhabitants of Portuchuelo and Monte Negro. The contributions of Africans, Amerindians, and Europeans to the ethnic composition of the studied populations were, respectively, 0.21 +/- 0.046, 0.44 +/- 0.064, and 0.35 +/- 0.069 in Portuchuelo; and 0.25 +/- 0.032,0.12 +/- 0.046, and 0.63 +/- 0.054 in Monte Negro.
authors.affiliation: 'Departmento de Parasitologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, Brazil.
authors.forename: R G M
authors.initials: RG
authors.lastname: Ferreira
authors.forename: M M
authors.initials: MM
authors.lastname: Moura
authors.forename: V
authors.initials: V
authors.lastname: Engracia
authors.forename: R C
authors.initials: RC
authors.lastname: Pagotto
authors.forename: F P
authors.initials: FP
authors.lastname: Alves
authors.forename: L M A
authors.initials: LM
authors.lastname: Camargo
authors.forename: L H Pereira
authors.initials: LH
authors.lastname: Silva
authors.forename: E P
authors.initials: EP
authors.lastname: Camargo
authors.forename: B
authors.initials: B
authors.lastname: Beiguelman
authors.forename: H
authors.initials: H
authors.lastname: Krieger
mesh_terms: D001789:Blood Group Antigens / Q000235:genetics*; D001938:Brazil; D005006:Ethnicity / Q000235:genetics*; D005787:Gene Frequency; D005828:Genetics, Population; D006801:Humans; D011110:Polymorphism, Genetic; D012424:Rural Population
chemical_list: D001789:Blood Group Antigens