Publications by authors named "Deiviane Aparecida Calegar"
The aim of the present study was to assess morphologic and genetic data on ascariasis in swine (Sus scrofa domesticus) and humans in low-resource rural and periurban communities in the state of Piauí, Brazil. Our cross-sectional survey included 100 fecal samples obtained from swine and 682 samples from humans. Fifteen pigs were necropsied.
View Article and Find Full Text PDFCytochrome c oxidase subunit 1 gene reveals species composition and phylogenetic relationships of Oesophagostomum spp. infecting pigs in northeastern Brazil.
Rev Bras Parasitol Vet
April 2022
Helminths of the genus Oesophagostomum cause enteric diseases and affect domestic animals such as pigs. The aim of this study was to explore the species composition and genetic diversity of Oesophagostomum spp. infecting pigs in close contact with humans in the state of Piauí, Brazil.
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- The study investigates the diversity, relationships, and distribution of Entamoeba species, which impact human health, across various Brazilian ecosystems.
- Researchers collected and analyzed fecal samples from multiple communities, identifying four species and establishing their prevalence, particularly noting higher positivity in children aged 6-10 years.
- Findings reveal significant interspecific diversity among Entamoeba spp., with specific subtypes prevalent in certain biomes, and highlight that E. histolytica was only found in the Amazon.
Socioenvironmental Factors Influencing Distribution and Intensity of Soil-Transmitted Helminthiasis in the Brazilian Amazon: Challenges for the 2030 Agenda.
J Trop Med
February 2021
Soil-transmitted helminthiasis (STHs) are poverty-related diseases with high prevalence rates in developing countries. The present study aims to describe the epidemiological scenario of STHs in an urban population in the Brazilian Amazon. A cross-sectional survey ( = 349 children aged 1-15 years) was carried out to obtain faecal samples and sociodemographic and sanitation data.
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- Hookworm infection remains a significant issue in rural Brazil, prompting researchers to study the genetic diversity and species composition of hookworms affecting humans through mitochondrial DNA analysis.
- Field studies were conducted across three municipalities in Brazil from 2013 to 2017, with paralyzed methods used on fecal samples to identify various hookworm clades and genetic relationships, revealing notable diversity among the species.
- Findings indicate that there are distinct subpopulations of Necator americanus and related hookworms, with genetic ties to both Asian and African origins, suggesting a complex evolutionary history and implications for future research in this area.
This study aims to describe the prevalence, distribution, and factors associated with soil-transmitted helminthiases (STHs) in rural localities in Piaui, Brazil. Two cross-sectional surveys (n=605 subjects; 172 families) were carried out in order to obtain socio-demographic, anthropometric, spatial and parasitological data. Parasites were evaluated using Kato-Katz and centrifugal sedimentation techniques.
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- - The study investigates the genetic diversity of Giardia duodenalis across different Brazilian biomes to understand its transmission and help develop control measures.
- - Researchers conducted surveys in three locations (Caatinga, Amazon rainforest, and Cerrado) with 944 participants, revealing distinct rates of the two main genetic groups (assemblages A and B) and their prevalence in each biome.
- - The findings highlight a greater genetic diversity of assemblage B in the Amazon, suggesting its complex transmission due to demographic factors, and propose that the significant genetic differences between assemblages A and B may warrant their classification as separate species.
Introduction: The present study aimed to determine the prevalence and factors associated with Giardia intestinalis infection, verifying its impact on the nutritional status of children in northeastern Brazil.
Methodology: A cross-sectional study was conducted to obtain parasitological, sociodemographic, and anthropometric data in two municipalities in the states of Piauí and Ceará, northeastern Brazil.
Results: Prevalence of giardiasis was 55/511 (10.
Frequency and molecular characterisation of Entamoeba histolytica, Entamoeba dispar, Entamoeba moshkovskii, and Entamoeba hartmanni in the context of water scarcity in northeastern Brazil.
Mem Inst Oswaldo Cruz
February 2016
This study aimed to estimate the frequency, associated factors, and molecular characterisation of Entamoeba histolytica, Entamoeba dispar, Entamoeba moshkovskii, andEntamoeba hartmanni infections. We performed a survey (n = 213 subjects) to obtain parasitological, sanitation, and sociodemographic data. Faecal samples were processed through flotation and centrifugation methods.
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