Mosquito Behaviour in Relation to Disease Eradication Programmes

con­ text, to imply the elimination of a pathogenic organism from a particular geographical area. The area in question may be anything from the whole world to a tea estate. The difference, however, is not merely one of scale. Global eradication, if successful, may be presumed to be permanent. Local eradication, however complete, can never amount to more than reduction by global standards, with the dangers of recrudescence which this implies. In practice, global eradication can be approached only by way of progressive local reduction, which necessarily becomes more difficult as it proceeds. In consequence, the need for a proper understanding of mosquito behaviour is likely to become more rather than less urgent with the passage of time. The first national malaria eradication proj ect was inaugurated in Vene­ zuela in 1945 [Gabaldon (34)]. Others followed shortly [reviews in Russell