H
Helena Keiko Toma
Researcher at Federal University of Rio de Janeiro
Publications - 47
Citations - 604
Helena Keiko Toma is an academic researcher from Federal University of Rio de Janeiro. The author has contributed to research in topics: Trypanosoma cruzi & Chagas disease. The author has an hindex of 15, co-authored 45 publications receiving 513 citations. Previous affiliations of Helena Keiko Toma include Universidade Federal de Santa Catarina & Universidade Federal de Minas Gerais.
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Trypanosoma rangeli (Tejera, 1920) isolated from a sylvatic rodent (Echimys dasythrix) in Santa Catarina Island, Santa Catarina State: first report of this trypanosome in southern Brazil.
Mário Steindel,J. C. Carvalho Pinto,Helena Keiko Toma,R. H. Mangia,R. Ribeiro-Rodrigues,Alvaro J. Romanha +5 more
TL;DR: A trypanosome strain isolated from a sylvatic rodent from Santa Catarina Island was characterized by the following methods, leading to the identification of the isolate as T. rangeli in southern Brazil, increasing the geographical distribution of this parasite.
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Investigation of Chagas disease in four periurban areas in northeastern Brazil: epidemiologic survey in man, vectors, non-human hosts and reservoirs
Marli Maria Lima,Otília Sarquis,Tiago Guedes de Oliveira,Taís Ferreira Gomes,Carolina Coutinho,Natalia Faria Daflon-Teixeira,Helena Keiko Toma,Constança Britto,Bernardo Rodrigues Teixeira,Paulo Sérgio D'Andrea,Ana Maria Jansen,Márcio Neves Bóia,Filipe Anibal Carvalho-Costa +12 more
TL;DR: It is concluded that Trypanosoma cruzi circulates within a domestic zoonotic cycle, requiring continuous surveillance, and Insecticide application to domiciles does not appear to prevent continuous reintroduction of wild triatomine specimens, presenting a challenge to authorities involved in Chagas disease control.
Characterization of Leishmania sp. strains isolated from autochthonous cases of human cutaneious leishmaniasis in Santa Catarina State, Southern Brazil
Edmundo C. Grisard,C J Carvalho Pinto,I Eger-Magrich,Alvaro J. Romanha,David A. Campbell,Helena Keiko Toma,José Hermênio Cavalcante Lima,Mário Steindel,Jeffrey Jon Shaw,Edna E. A. Ishikawa +9 more
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Characterization of Leishmania sp. strains isolated from autochthonous cases of human cutaneous leishmaniasis in Santa Catarina State, southern Brazil
Edmundo C. Grisard,Mário Steindel,Jeffrey Jon Shaw,Edna Aoba Yassui Ishikawa,Carlos J Carvalho-Pinto,Iriane Eger-Mangrich,Helena Keiko Toma,José Hermênio Cavalcante Lima,Alvaro J. Romanha,David A. Campbell +9 more
TL;DR: The southernmost autochthonous cases of ACL in Brazil are due to two different Leishmania sp.
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Detection and molecular characterization of piroplasms species from naturally infected dogs in southeast Brazil
Tatiana Didonet Lemos,Aloysio de Mello Figueiredo Cerqueira,Helena Keiko Toma,Adrianna Vieira da Silva,Rafael Gomes Bartolomeu Corrêa,Giane Regina Paludo,Carlos Luiz Massard,Nádia Regina Pereira Almosny +7 more
TL;DR: This study confirms the presence of Babesia vogeli and Rangelia vitalii circulate in domestic dogs in Teresópolis, Rio de Janeiro, Brazil.