INFLUENCE OF ABIOTIC VARIABLES ON THE SEASONAL DYNAMICS OF AMBLYOMMA IN PERI-URBAN AREAS OF THE BRAZILIAN CERRADO (2024-2025)

Isabelle De Freitas Sousa; Philippe Henri Bomfim Souza Trumeau; GUILHERME RODRIGUES DINIZ; Ana Carolina Mota de Faria; Lucas Edel Donato; ANDERSON DE MORAIS LEOCADIO; Israel Martins Moreira; MARIANA GUIMARÃES CÔRTES DA CRUZ; Ana Beatriz Pais Borsoi; Gilberto Salles Gazeta

Título do Trabalho

Autores

Isabelle De Freitas Sousa
Philippe Henri Bomfim Souza Trumeau
GUILHERME RODRIGUES DINIZ
Ana Carolina Mota de Faria
Lucas Edel Donato
ANDERSON DE MORAIS LEOCADIO
Israel Martins Moreira
MARIANA GUIMARÃES CÔRTES DA CRUZ
Ana Beatriz Pais Borsoi
Gilberto Salles Gazeta

Modalidade

Resumo

Área temática

Protozoologia e patógenos transmitidos por vetores

Data de Publicação

24/09/2026

País da Publicação

Brasil

Idioma da Publicação

pt-BR

Página do Trabalho

https://www.even3.com.br/anais/23-congresso-brasileiro-de-parasitologia-veterinaria-673729/1565782-influence-of-abiotic-variables-on-the-seasonal-dynamics-of-amblyomma-in-peri-urban-areas-of-the-brazilian-cerrad

ISBN

978-65-272-2733-5

Palavras-Chave

Vector Ecology, Seasonality, Temperature, Relative Humidity

Resumo

The ecology of tick-borne diseases (TBDs) is directly influenced by abiotic factors that modulate vector survival, development, and questing activity in the environment. In the Federal District (DF), the seasonal transition between dry and rainy periods creates distinct ecological niches that affect the phenology of ixodid ticks. This study aimed to analyze the influence of temperature and relative humidity (RH) on the population dynamics of ticks of the genus Amblyomma in four peri-urban areas of the DF: Santa Maria, Samambaia, Sobradinho, and São Sebastião. Between October 2024 and February 2025, three strategic monitoring cycles were performed using drag sampling and carbon dioxide (CO2) traps. Climatic data were recorded in loco via digital thermo-hygrometer to correlate with the abundance of the 187 collected specimens. Analysis revealed that the vector life cycle is strictly regulated by regional seasonality. During the transition period (October 2024), under an average temperature of 20°C and RH of 67%, a predominance of immature forms (larvae and nymphs) was observed (n=56). These stages exhibit lower resistance to desiccation and a high dependency on specific microclimates for survival. In contrast, during the rainy season (December 2024 to February 2025), with elevated temperatures (24°C-30°C) and RH of 75%, a peak of adults was recorded (70.05%; n=131), evidencing a questing behavior intensified by the favorable humidity. The species Amblyomma sculptum was predominant (93.58%), followed by Amblyomma dubitatum (5.35%), demonstrating high adaptability to the climatic oscillations of the peri-urban Cerrado. It is concluded that the temperature-humidity binomial acts as the primary regulator of the population density of medically important vectors in the region. These findings are fundamental for developing risk predictive models for Spotted Fever, allowing for the identification of critical epidemiological windows of higher vector activity based on seasonal meteorological variations in the Federal District.

Título do Evento: 23º Congresso Brasileiro de Parasitologia Veterinária
Cidade do Evento: Belo Horizonte
Título dos Anais do Evento: Anais do XXIII Congresso Brasileiro de Parasitologia Veterinária
Nome da Editora: Even3
Meio de Divulgação: Meio Digital

Como citar

SOUSA, Isabelle De Freitas et al.. INFLUENCE OF ABIOTIC VARIABLES ON THE SEASONAL DYNAMICS OF AMBLYOMMA IN PERI-URBAN AREAS OF THE BRAZILIAN CERRADO (2024-2025).. In: Anais do XXIII Congresso Brasileiro de Parasitologia Veterinária. Anais...Belo Horizonte(MG) Centro de Atividades Didáticas I (CAD 1) da Universidade Federal de Minas Gerais (UFMG), 2026. Disponível em: https//www.even3.com.br/anais/23-congresso-brasileiro-de-parasitologia-veterinaria-673729/1565782-INFLUENCE-OF-ABIOTIC-VARIABLES-ON-THE-SEASONAL-DYNAMICS-OF-AMBLYOMMA-IN-PERI-URBAN-AREAS-OF-THE-BRAZILIAN-CERRAD. Acesso em: 01/11/2026