Field experiments in malaria control / Wickliffe Rose.

  • Wickliffe Rose
Date:
1919]
Catalogue details

Licence: Public Domain Mark

Credit: Field experiments in malaria control / Wickliffe Rose. Source: Wellcome Collection.

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    to 1905, were accomplished at a cost of $50 per acre treated at Klang and $250 per acre at Port Swetten- ham. More recently, large areas have been treated on rubber estates near Klang at a cost of from $25 to $30 per acre. The cost of operations in the Canal Zone— our most conspicuous demonstration in malaria control —was on the average for a period of five years about $365,000 annually. With an average population of about 100,000 for the area treated, this represents an annual per capita cost of $3.65. Controlling mosqui- toes at from $25 to $30 per acre is a sound business investment on rubber estates that pay more than 100 per cent. in annual dividends and in a region in which the death rate among the coolies on unprotected estates runs as high at times as 176 per thousand. Such expenditures, however, are practical only under excep- tional conditions. As a necessary part of digging the canal, the cost of sanitary operations on the Zone is negligible; but as a part of normal public health work such measures are feasible only in limited areas in which there is a dense population to support them. More recent demonstrations indicate that malaria control may be brought within reach of the average community. It was with a view to contributing, if possible, to this end that the series of field experiments here to be reported were undertaken. In these experi- ments it has been assumed that if communities are to be induced to undertake the work they must be shown that the investment pays, and that it can be carried out within limits of expenditure that they can afford. It has been assumed also that no single measure can be made universally applicable; that the effective pro- gram in malaria control will comprehend the free employment of all means that are known to be service- able, and will place emphasis at any particular time and place on that measure or combination of measures that under the given conditions will accomplish the result with least expenditure. It is assumed, furthermore, that the successful operation of a program of this character will presuppose, on the part of the person administering it, definite understanding of the condi- tions under which the work is to be done and of the possibilities and limitations of each of the measures that he is to employ. No attempt has been made, there- fore, in these first experiments to put into operation a
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