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Phenotypic characterization and genomic analysis of Crithidia-like parasites obtained from patients diagnosed with Visceral Leishmaniasis

Grant number: 20/14011-8
Support Opportunities:Scholarships in Brazil - Doctorate (Direct)
Effective date (Start): December 01, 2020
Effective date (End): October 31, 2023
Field of knowledge:Biological Sciences - Parasitology - Protozoology of Parasites
Principal Investigator:Sandra Regina Costa Maruyama
Grantee:Luana Aparecida Rogerio
Host Institution: Centro de Ciências Biológicas e da Saúde (CCBS). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
Associated research grant:16/20258-0 - Visceral leishmaniasis: genomics approaches for integrated molecular analysis of host and parasite, AP.JP
Associated scholarship(s):21/12715-0 - Comparative dual transcriptome analysis of human macrophages infected with Crithidia-like or Leishmania parasites, BE.EP.DD


Leishmaniasis is a group of neglected anthropozoonotic diseases that can be caused by over 20 species of protozoa from genus Leishmania. Visceral Leishmaniasis (VL), focus of this project, is a serious form of the disease that can be fatal if untreated or misdiagnosed. Brazil is an endemic country for VL, where the most cases occur in the Brazilian Northeast. However, recently VL has spread to several regions, including in the state of São Paulo, with potential to become a serious Public Health problem soon. VL is caused by species L. infantum. Interestingly, preliminary results have shown that clinical isolates of VL obtained from an endemic region in the Northeast region do not belong to the genus Leishmania and are phylogenetically more related to the genus Crithidia. This genus belongs to the group of monoxenic trypanosomatids, i.e., they infect only one host, in this case, invertebrates. Crithidia only infects insects and is considered non-pathogenic to humans. In order to evaluate these clinical isolates Crithidia-like, this project aims to characterize phenotypically and analyze the genome of these parasites. For this, cultures of promastigote forms will be analyzed for growth curve and morphological parameters, as well as in vitro infectivity. The genomic DNA will be sequenced and through different Bioinformatics tools, the genome will be assembled and compared to other trypanosomatids species. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
TAKAMIYA, NAYORE TAMIE; ROGERIO, LUANA APARECIDA; TORRES, CAROLINE; LEONEL, JOAO AUGUSTO FRANCO; VIOTI, GEOVANNA; OLIVEIRA, TRICIA MARIA FERREIRA DE SOUSA; VALERIANO, KAROLINE CAMILA; PORCINO, GABRIANE NASCIMENTO; SANTOS, ISABEL KINNEY FERREIRA DE MIRANDA; COSTA, CARLOS H. N.; et al. Parasite Detection in Visceral Leishmaniasis Samples by Dye-Based qPCR Using New Gene Targets of Leishmania infantum and Crithidia. TROPICAL MEDICINE AND INFECTIOUS DISEASE, v. 8, n. 8, p. 25-pg., . (21/12464-8, 16/18527-3, 18/26799-9, 19/19789-0, 16/20258-0, 21/10358-6, 20/15771-6, 20/14011-8, 17/16328-6)
GOMES, ELLEN; ROGERIO, LUANA APARECIDA; TAKAMIYA, NAYORE TAMIE; TORRES, CAROLINE; DA SILVA, JOAO SANTANA; ALMEIDA, ROQUE PACHECO; MARUYAMA, SANDRA REGINA. Dataset of dual RNA-seq mapping in visceral leishmaniasis: Inquiry on parasite transcripts in human blood transcriptome upon Leishmania infantum infection. DATA IN BRIEF, v. 46, p. 7-pg., . (16/20258-0, 17/16328-6, 21/12464-8, 22/01525-9, 20/14011-8, 13/08216-2, 21/10358-6)
ROGERIO, LUANA APARECIDA; TAKAHASHI, TALITA YURI; CARDOSO, LURIA; TAKAMIYA, NAYORE TAMIE; DE MELO, ENALDO VIEIRA; DE JESUS, AMELIA RIBEIRO; DE OLIVEIRA, FABRICIA ALVISI; FORRESTER, SARAH; JEFFARES, DANIEL C.; RIBEIRO, JOSE MARCOS; et al. Co-infection of Leishmania infantum and a Crithidia- related species in a case of refractory relapsed visceral leishmaniasis with non-ulcerated cutaneous manifestation in Brazil. INTERNATIONAL JOURNAL OF INFECTIOUS DISEASES, v. 133, p. 4-pg., . (21/12464-8, 19/03095-9, 19/12142-0, 16/20258-0, 20/14011-8, 17/16328-6)

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