Transmission of Leucocytozoon sakharoffi in England by Simulium angustitarse

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Abstract
SUMMARY: Leucocytozoon sakharoffi of English rooks (Corvus f. frugilegus) underwent sporogony in female Simulium (Eusimulium) angustitarse, the cycle taking 3–4 days. Sporozoites from the salivary glands of S. angustitarse, both naturally and experimentally infected, gave rise to L. sakharoffi infections when injected to aparasitaemic rooks, with a minimum pre-patent period of 8 days.I am very grateful to the following persons, for invaluable help in many ways: Mr C. Swan and Mr A. Ponchaud (Ministry of Agriculture, Fisheries and Food); Dr J. Ash, Mr N. A. Wood and Mr M. Holland (Game Research Association); Mr N. A. Hancock (Smith, Kline and French); Mr N. Biddlecombe (Breamore Estate); Dr L. Davies (Durham University); Professor D. S. Bertram, Mr E. J. Blackie, Miss L. Selden, Miss J. Freeman and Mr P. Mellor (London School of Hygiene and Tropical Medicine).This work was generously supported by a grant from the Natural Environment Research Council.