The prevention of malaria.

  • Ronald Ross
Date:
1910
Catalogue details

Licence: In copyright

Credit: The prevention of malaria. Source: Wellcome Collection.

Provider: This material has been provided by London School of Hygiene & Tropical Medicine Library & Archives Service. The original may be consulted at London School of Hygiene & Tropical Medicine Library & Archives Service.

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    Culex and Stegomyia; and in April 1897 I went to an intensely malarious spot near Ootacamund in the Nilgiri mountains, in order to see if I could find another likely kind. There, for the first time, I saw an Anopheline—the really culpable kind ; and also made several observations which made me finally abandon the second part of Manson's hypothesis and adopt the view that the insects carry the parasites in some way from man to man [1898]. A few months later I returned to Secunderabad, where I had commenced my mosquito work in 1895, and was at last rewarded with success. On the 20th and 21st August I found the zygotes of the parasites in two large dapple - winged mosquitos which had been bred from the larva, and fed on a case containing crescents. This fortunate observation gave the clue to all that followed, because it indicated the form and position of the parasite in the insect, and also the variety of insect capable of carrying it. The problem was practically solved, and only details and formal proofs required to be ascertained. Figure i.