Indoor and outdoor winter activity of Culicoides biting midges, vectors of bluetongue virus, in Italy
| Autor: | P. Silvestri, Silvia Ravagnan, G. Da Rold, Andrea Carvelli, Paola Scaramozzino, Adele Magliano, A. Moni, Fabrizio Montarsi, G. Cincinelli, C. De Liberato |
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| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Male Veterinary medicine Ceratopogonidae 030231 tropical medicine Culicoides obsoletus Bluetongue 03 medical and health sciences 0302 clinical medicine Animals Inverse correlation Ecology Evolution Behavior and Systematics Overwintering High rate General Veterinary biology Feeding Behavior biology.organism_classification Culicoides Housing Animal Insect Vectors 030104 developmental biology Biting Italy Insect Science Midge Parasitology Cattle Female Seasons Bluetongue virus |
| Zdroj: | Medical and veterinary entomology. 32(1) |
| ISSN: | 1365-2915 |
| Popis: | Indoor and outdoor winter activity of Culicoides spp. (Diptera: Ceratopogonidae) in central Italy was investigated in order to evaluate whether indoor activity might account for the overwintering of bluetongue virus, as has been hypothesized by some authors. Weekly Culicoides collections were performed at three farms over three consecutive winter seasons. At each farm, two black-light traps were operated simultaneously, indoors and outdoors. Culicoides were identified using both morphological and molecular means. The Culicoides obsoletus group accounted for 98.2% of sampled specimens. Within this group, C. obsoletus s.s. accounted for 56.8% and Culicoides scoticus for 43.2% of samples. Nulliparous, parous and engorged females were caught throughout the entire winter, both indoors and outdoors. At times, indoor catch sizes outnumbered outdoor collections. A significant inverse correlation was found between minimum temperature and the proportion of indoor Culicoides of the total midge catch, thus indicating that lower outdoor temperatures drive Culicoides midges indoors. High rates of engorged females were recorded indoors, possibly as the result of the propensity of C. obsoletus females to feed indoors. Higher proportions of parous females were found in indoor than in outdoor catches, indicating higher survival rates indoors and, consequently, higher vectorial capacities of midges sheltering indoors compared with those remaining outdoors. |
| Databáze: | OpenAIRE |
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