Banca de DEFESA: FERNANDA GONÇALVES DE SOUZA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : FERNANDA GONÇALVES DE SOUZA
DATE: 03/03/2026
TIME: 09:00
LOCAL: Plataforma Google Meet
TITLE:

Molecular diagnostic of vector-borne pathogens in dogs from Indigenous villages in the State of Rio de Janeiro.

 

KEY WORDS:

Vector-borne diseases; dogs; indigenous communities; polymerase chain reaction; One Health.

PAGES: 66
BIG AREA: Ciências Agrárias
AREA: Medicina Veterinária
SUBÁREA: Medicina Veterinária Preventiva
SPECIALTY: Doenças Parasitárias de Animais
SUMMARY:

Vector-borne diseases in dogs represent an important challenge for veterinary medicine, especially in Indigenous communities that maintain a close relationship with the ecosystems of the Atlantic Forest, favoring exposure to hematophagous arthropods and agents with zoonotic potential. The socio-environmental vulnerability of these populations may contribute to the maintenance and circulation of these pathogens. The present study aimed to detect vector-borne pathogens in dogs from Indigenous villages located in the Costa Verde region (Paraty and Angra dos Reis) and in the municipality of Maricá, in the state of Rio de Janeiro, as well as to evaluate possible epidemiological factors associated with infection. Blood samples were collected from 152 dogs from six Indigenous villages. Pathogen detection was performed using quantitative PCR (qPCR) and conventional PCR (cPCR), employing specific primers for Ehrlichia canis, Anaplasma phagocytophilum, Babesia vogeli, Dirofilaria immitis, Acanthocheilonema reconditum, and Hepatozoon canis. Bivariate statistical analyses were conducted to investigate associations between positivity and individual, environmental, and management variables. Molecular analyses revealed positivity for five distinct agents: D. immitis (17.1%), A. reconditum (14.5%), E. canis (8.6%), H. canis (2.6%), and B. vogeli (1.3%), while no dogs tested positive for A. phagocytophilum by qPCR. Coinfections were infrequent, occurring in three animals. Epidemiological analysis demonstrated statistically significant associations between age and infection by E. canis and A. reconditum, as well as between the consumption of raw meat and positivity for D. immitis. Spatial variation in the distribution of agents among the evaluated villages was also observed. In conclusion, there is widespread circulation of vector-borne pathogens in the studied Indigenous villages, representing an important challenge for animal health and a potential risk to public health. These findings reinforce the need for preventive measures, continuous epidemiological surveillance, and integrated strategies under the One Health perspective, recognizing the interdependence between animal, human, and environmental health.

COMMITTEE MEMBERS:
Presidente - 3701492 - HUARRISSON AZEVEDO SANTOS
Externo ao Programa - 1296670 - WENDELL MARCELO DE SOUZA PERINOTTO - UFRRJExterna à Instituição - ALINE MOREIRA DE SOUZA - UFF
Externo à Instituição - CARLOS LUIZ MASSARD
Externa à Instituição - NATHALIE COSTA DA CUNHA - UFF