Abstract
Among foci of cutaneous leishmaniasis in Israel, population densities of the vector sandfly Phlebotomus papatasi Scopoli (Diptera: Psychodidae) were assessed during April-October 1999 in the mesic Negev desert and the hyper-xeric Arava valley, using sticky traps placed overnight near host burrows of the fat sand rat, Psammomys obesus Cretzschmar (Cricetidae: Gerbillinae). Population dynamics of Ph. papatasi differed between the Negev (study sites on sand near Mount Keren and on loess at Nizzana ruins) and the Arava valley (study sites on sand at Shezaf and in a fallow field near irrigation at wadi Arava). At the Negev sites, sandfly abundance peaked in spring (April or May), whereas at Arava sites Ph. papatasi population densities were bi-modal, with peaks in both spring and autumn (September or October). This might be conducive to sustaining enzootic Leishmania major Yakimoff & Schokhor (Kinetoplastida: Trypanosomatidae). In both areas, Ph. papatasi densities were much higher at the site with moister soil, raising transmission risks of zoonotic cutaneous leishmaniasis.
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