title: Infection with Schistosoma mansoni correlates with altered immune responses to Ascaris lumbricoides and hookworm.
abstract: Studies were performed on humoral and cellular immune responses of patients from areas in Brazil endemic for hookworm and Ascaris lumbricoides, and either endemic or non-endemic for Schistosoma mansoni. Humoral and cellular responses were evaluated by enzyme-linked immunosorbant assay (ELISA) and peripheral blood mononuclear cell (PBMC) proliferation assays against larval hookworm antigens, A. lumbricoides egg antigens, and soluble egg antigens (SEA) or soluble whole adult antigenic preparation (SWAP) from S. mansoni. Patients from S. mansoni-endemic areas, who currently had only hookworm or Ascaris infections, expressed lower humoral and cellular responses to hookworm or Ascaris antigens, respectively, than did their counterparts from areas not endemic for S. mansoni. Individuals from S. mansoni endemic area, although without detectable S. mansoni infection, do mount humoral and cellular responses to SEA and SWAP. This group of individuals has been probably in contact with S. mansoni antigens, since the groups harboring A. lumbricoides or hookworm infections from non-S. mansoni endemic areas do not have detectable anti-S. mansoni responses. PBMC proliferative responses discriminated well between patients with active hookworm infections versus ascariasis, if they were from areas not endemic for S. mansoni.
authors.affiliation: Lab. de Immunologia Celular e Molecular, Centro de Pesquisas René Rachou-FIOCRUZ, Av. Augusto de Lima 1715 Barro Preto, Belo Horizonte, MG, 30190-002, Brazil. correa@cpqrr.fiocruz.br
authors.forename: Rodrigo
authors.initials: R
authors.lastname: Corrêa-Oliveira
authors.forename: Denise B
authors.initials: DB
authors.lastname: Golgher
authors.forename: Guilherme C
authors.initials: GC
authors.lastname: Oliveira
authors.forename: Omar S
authors.initials: OS
authors.lastname: Carvalho
authors.forename: Cristiano L
authors.initials: CL
authors.lastname: Massara
authors.forename: Iramaya R
authors.initials: IR
authors.lastname: Caldas
authors.forename: Daniel G
authors.initials: DG
authors.lastname: Colley
authors.forename: Giovanni
authors.initials: G
authors.lastname: Gazzinelli
mesh_terms: D000293:Adolescent; D000328:Adult; D000818:Animals; D000909:Antibodies, Helminth / Q000276:immunology / Q000302:isolation & purification*; D001196:Ascariasis / Q000453:epidemiology / Q000276:immunology*; D017164:Ascaris lumbricoides / Q000276:immunology*; D001938:Brazil / Q000453:epidemiology; D002648:Child; D004797:Enzyme-Linked Immunosorbent Assay; D005243:Feces / Q000469:parasitology; D005260:Female; D006725:Hookworm Infections / Q000453:epidemiology / Q000276:immunology*; D006801:Humans; D008297:Male; D015995:Prevalence; D012550:Schistosoma mansoni / Q000276:immunology*; D012552:Schistosomiasis / Q000453:epidemiology / Q000276:immunology*
chemical_list: D000909:Antibodies, Helminth