Publications by authors named "Samanta das Chagas Xavier"
Article Synopsis
- Non-human primates (NHPs) in Brazil were studied to investigate the infection rates of Trypanosoma minasense, with a focus on how landscape composition and forest fragmentation affected these rates.
- Sapajus nigritus showed the highest positivity for T. minasense in blood samples (60.9%), while other species like Callithrix spp. and Alouatta guariba clamitans had lower rates, but molecular analysis indicated significant infections in all groups.
- The study found a correlation between T. minasense infections and environmental factors: higher forest fragmentation led to increased infection rates in NHPs, suggesting that habitat loss may drive disease prevalence.
Environmental influence on Triatoma vitticeps occurrence and Trypanosoma cruzi infection in the Atlantic Forest of south-eastern Brazil.
Geospat Health
October 2021
Trypanosoma cruzi requires a triatomine insect vector for its life cycle, which can be complex in different enzootic scenarios, one of which is the unique transmission network in the Atlantic Forest of south-eastern Brazil. In Espírito Santo (ES) State, highly infected Triatoma vitticeps are frequently reported invading domiciles. However, triatomines were not found colonizing residences and mammals in the surrounding areas did not present T.
View Article and Find Full Text PDFBackground: Trypanosoma cruzi, the causal agent of Chagas disease, is monophyletic but genetically heterogeneous. It is currently represented by six genetic lineages (Discrete Typing Units, DTUs) designated TcI-TcVI. TcI is the most geographically widespread and genetically heterogeneous lineage, this as is evidenced by a wide range of genetic markers applied to isolates spanning a vast geographic range in Latin America.
View Article and Find Full Text PDFTo understand the interaction of Trypanosoma cruzi with caviomorph rodents, which supposedly have an ancient co-evolutionary history with this parasite, experimental infection of laboratory reared Trichomys apereoides with several isolates of both genotypes of the parasite was studied. Parasitemia, pattern of hematic cells, specific humoral immune response, histopathological features and parasite clearance were appraised. T.
View Article and Find Full Text PDFA breeding in captivity program of neotropical primates for subsequent reintroduction in nature is in progress at the Primatology Center of Rio de Janeiro (CPRJ). Almost 200 animals of 20 species that include both wild captured animals and specimens born in captivity are maintained in CPRJ. Here, we examined 198 primates of CPRJ for infection with the protozoan parasite Trypanosoma cruzi.
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