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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    streams, sluggish irrigation channels, ditches, muddy tricklets and edges of rivers. Myzomyia lutzii.—Lutz [1903] says that he is convinced that this mosquito carries malaria, but gives no further evidence. Oswaldo Cruz (section 47) suspects it. Occurs in Brazil, British Guiana. Lutz who paid considerable attention to the bionomics of this mosquito, states that it is found widely distributed in various places along the chain of mountains in the region of San Paolo and Santos. It breeds in Bromilaceous plants. Myzomyia rossii.—I failed in infecting this species in Calcutta in 1898-1899. Stephens and Christophers [1902] obtained experimentally quartan and malignant zygotes in a few individuals. Never found them infected in nature. They add that zygotes were found in nature by Captain James, but sporozoits never in nearly 1,000 dissected. W. T. de Vogel [1909] found zygotes in two insects bred from larvae grown in salt water (1*3%), but not in those bred in fresh water. C. A. Bentley also finds them in sea water; and failed to discover the parasites in 425 dissected. Occurs in India, Ceylon, Malay States, China, East Indies, Philippine Islands, and Java. Breeds in foul puddles near habitations, clean clear water puddles without much algae, and often turbid with suspended matter, boats and puddles near houses, shallow muddy rivers, rice fields and cultivation of all kinds. Theobald states that Mr E. E. Green (Tropical Agriculture, vol. xxvii. p. 84, 1906) considers that it is a malaria carrier in parts of Ceylon. He found the larvae breeding in a brackish lake at Batticaloa, and also in the cocoanut estates, in the small water holes used for watering young plants, and in chatties sunk at the roots of plants. I have often thought that the comparative healthiness of India may be due to the fact that this species ousts more dangerous ones. Vogel's suggestion is interesting.1 Myzomyia turkhudi.—Incriminated by Stephens and Christophers [1902]. Found to carry, experimentally, malignant tertian zygotes. Occurs in India; and found in large pools in quarries, stony and shallow running waters. Myzorhynchus barbirostris.-—Proved by Stephens and Christophers [1902] to develop malignant tertian experimentally. Their first experi- ments had been negative. Occurs in India, Malay Peninsula. Stated 1 See also section 65 (8).