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This study was conducted around Céret (Pyrénées-Orientales, mean elevation 200 m) to test the statistical reliability of 12 stations devoted to sampling the  Leishmania infantum  vectors  Phlebotomus ariasi  and  P. perniciosus  in the South of France. Each station included a retaining wall and the surrounding phytoecological environment (total area: 2,000 m 2 ). The wall had rectangular drainage cavities (weep holes) in which flight interception traps (sticky paper) were inserted and stretched every 10 days from May to October. For both vector species, the statistical analysis of 10-day and annual frequencies led to the following conclusions: (1)  P. ariasi  densities were significantly higher than  P. perniciosus  densities, (2) densities per species were significantly different at the 12 stations : none of them could be considered as representative of local vector densities, which depend on the wall structure (exposure, shade, vertebrate hosts), (3) the 10-day variation trends were not significantly different between stations, indicating that these variations are not determined by the station structure but rather by a common external factor (likely meteorological) and (4) the phytoecological features at the stations were not correlated with the sandfly densities. Most of the observations obtained with  P. ariasi  and  P. perniciosu s are also relevant for the non-vectorial species  S. minuta.  In conclusion, future research on the dynamics of leishmaniasis outbreaks relative to climate change and agricultural-silvicultural modifications should be very cautiously carried out, while focusing especially on the vector sampling quality and the use of phytoecological maps as vector density indicators.

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Ecology of leishmaniasis in the South of France. 22. Reliability and representativeness of 12Phlebotomus ariasi,P. perniciosusandSergentomyia minuta(Diptera: Psychodidae) sampling stations in Vallespir (eastern French Pyrenees region)