Current Topics in Vector Research is based on the premise that to unÂ- derstand the whole, one must first understand the component parts and how they interact. Here in Volume 4, as well as in future volumes, vector, pathogen, and host will be treated both individually and as integral parts of multifaceted transmission systems. It is our intention to present up-toÂ- date, coherent syntheses of the latest findings in vector research, suggest promising frontiers for future research, and call attention to possible pracÂ- tical applications of our present understandings of pathogen-vector-host interactions. To realize our goals, we invite world-renowned, veteran sciÂ- entists as well as neophytes to report on their individual areas of expertise. Where appropriate, authors are encouraged to draw conclusions and proÂ- pose hypotheses that stimulate additional thinking and research or othÂ- erwise further our understanding of vector transmission cycles and how such cycles might be interrupted. It is our hope that readers will agree that we are serving these objectives and creating a milieu for specialists and generalists in vector research to maintain rapport and understanding.