Banca de DEFESA: ODAIR JOSE QUEIROZ DA SILVA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : ODAIR JOSE QUEIROZ DA SILVA
DATE: 20/02/2025
TIME: 09:00
LOCAL: Virtual https://meet.google.com/kxz-jucr-mdt?authuser=0
TITLE:

EVALUATION OF TRYPANOSOMA CRUZI INFECTION IN TRIATOMINE BUGS IN
MUNICIPALITIES CONSIDERED AT HIGH RISK OF TRANSMISSION IN RIO GRANDE DO NORTE, BRAZIL

 

KEY WORDS:

Triatoma brasiliensis. Chagas disease. Endemic areas. Species
diversity. Natural infection rate.

 

PAGES: 54
BIG AREA: Ciências Biológicas
AREA: Parasitologia
SUMMARY:

The state of Rio Grande do Norte (RN) is endemic for Chagas disease, with 36 municipalities at high risk of
Trypanosoma cruzi transmission. The aim of this study was to assess the occurrence of T. cruzi infected
triatomines domiciliary units (UDs) in municipalities at high risk of the parasite transmission in RN, as well
as the species diversity in the wild environment. Triatomines were collected in DUs and wild environments,
identified, and their intestinal content analyzed by using direct examination, xenoculture, and kDNA PCR
for parasite detection. A total of 22 DUs were investigated, 14 in São Tomé and six in Sítio Novo, with the
presence of triatomines recorded in 21.4% (3/14) and 16.7% (1/6), respectively. The municipality São Tomé
showed a high percentage of infected triatomines, corresponding to 14.2%. In the DUs, 40 triatomines were
captured, and the only species identified was Triatoma brasiliensis in both São Tomé and Sítio Novo. The
natural infection rate for T. cruzi was 7.5%, with the highest rate in T. brasiliensis (8.8%). In the wild
environment, the highest species diversity was found in the ESEC-Seridó, where specimens of T. brasiliensis,
Triatoma pseudomaculata, Panstrongylus lutzi, and Triatoma sp. were captured. Triatoma brasiliensis was the most frequently captured species in both ESEC-Seridó and Sítio Novo. The natural infection rate for T.
cruzi was 3.5%, with the highest rate in P. lutzi (100% - 1/1), followed by T. pseudomaculata (50% - 1/2) and
T. brasiliensis at 2.8% (4/141). These data highlight the importance of continuous surveillance and control
in high-risk municipalities to prevent T. cruzi transmission to humans and animals.

 

 

COMMITTEE MEMBERS:
Externa à Instituição - THALLYTA MARIA VIEIRA - UNIMONTES
Presidente - 1218940 - ANTONIA CLAUDIA JACOME DA CAMARA
Interno - 1752367 - PAULO MARCOS DA MATTA GUEDES