Distribution of de Culicoides obsoletus and Culicoides punctatus in Galicia and their importance for the control of Bluetongue and Epizootic Hemorrhagic Disease
Authorship
M.S.L.
Bachelor in Veterinary
M.S.L.
Bachelor in Veterinary
Defense date
09.22.2025 16:15
09.22.2025 16:15
Summary
Culicoides obsoletus and Culicoides punctatus are two species of hematophagous dipterans widely distributed in Galicia and highly relevant in animal health, as they act as vectors of viral diseases such as Bluetongue (BT) and Epizootic Hemorrhagic Disease (EHD). To update their distribution in the region, an entomological study was carried out between January and November 2024. A total of 176 sampling sessions were conducted across the four provinces of Galicia using CDC-UV and BG-Sentinel traps. Specimens were identified in the laboratory using a stereomicroscope and taxonomic keys based on wing patterns. A total of 59.65% of the samples were positive, with 4805 individuals identified, C. obsoletus being the most abundant species (73.37%). The highest abundance occurred during the warmer months (March to August), especially in rural areas and at mid altitudes. Both species were present in all surveyed environments, altitudes, and climates, confirming their wide distribution throughout Galicia. Results suggest that C. obsoletus may play a key role in BT transmission, while C. punctatus could be involved in EHD transmission, though further studies are needed. It is concluded that continuous entomological surveillance is essential for the prevention of Culicoides-borne diseases, along with specific control measures during peak vector activity periods.
Culicoides obsoletus and Culicoides punctatus are two species of hematophagous dipterans widely distributed in Galicia and highly relevant in animal health, as they act as vectors of viral diseases such as Bluetongue (BT) and Epizootic Hemorrhagic Disease (EHD). To update their distribution in the region, an entomological study was carried out between January and November 2024. A total of 176 sampling sessions were conducted across the four provinces of Galicia using CDC-UV and BG-Sentinel traps. Specimens were identified in the laboratory using a stereomicroscope and taxonomic keys based on wing patterns. A total of 59.65% of the samples were positive, with 4805 individuals identified, C. obsoletus being the most abundant species (73.37%). The highest abundance occurred during the warmer months (March to August), especially in rural areas and at mid altitudes. Both species were present in all surveyed environments, altitudes, and climates, confirming their wide distribution throughout Galicia. Results suggest that C. obsoletus may play a key role in BT transmission, while C. punctatus could be involved in EHD transmission, though further studies are needed. It is concluded that continuous entomological surveillance is essential for the prevention of Culicoides-borne diseases, along with specific control measures during peak vector activity periods.
Direction
CAZAPAL MONTEIRO, CRISTIANA FILIPA (Tutorships)
HERNANDEZ MALAGON, JOSE ANGEL (Co-tutorships)
CAZAPAL MONTEIRO, CRISTIANA FILIPA (Tutorships)
HERNANDEZ MALAGON, JOSE ANGEL (Co-tutorships)
Court
SUAREZ REY, MARIA LUISA (Chairman)
LENDOIRO BELIO, ELENA (Secretary)
LAMAS FREIRE, ALEXANDRE (Member)
SUAREZ REY, MARIA LUISA (Chairman)
LENDOIRO BELIO, ELENA (Secretary)
LAMAS FREIRE, ALEXANDRE (Member)