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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    to have been found at Old Calabar (?). Breeds in running waters with much weed and algae, swamps, and deep water with much aquatic vegetation. Myzorhynchus sinensis.—Tsuzuki [1902] proved that the parasites develop in all stages in this mosquito and that it causes infection in a healthy man. Also that quartan parasites develop in many of these mosquitos; but he did not infect man with this species of parasite. Kinoschita cultivated mild tertian parasites in seven out of sixteen mosquitos, but quartan only at low temperatures, and malignant parasites not at all. Occurs in Formosa, Japan, China, Federated Malay States. Habits not described. Myzorhynchus umbrosus.—Incriminated by Malcolm Watson. Ex- periments not mentioned, but certainly a carrier. Occurs in the Federated Malay States. Breeds principally in the flat country, but not in flowing water. Abounds in thick jungle which it will not willingly leave, so that removal of jungle round plantations reduces malaria (section 57). Nyssorhynchus annulipes.—Kinoshita [1906] developed malignant, only at high temperature without oscillations, in three ou. of five mosquitos. Occurs in South West Queensland, Australia, Formosa. Donitz says it occurs in the Bismarck Islands. Breeds both in fresh and in salt water (1,040 sp. gr.), and will live for a month on dates. Myzorhynchus fuliginosus.—Incriminated by Stephens and Christo- phers [1902] and Adie [1903]. Stephens and Christophers say that it occurred in Mian Mir in small numbers, and think that it is not an active agent. They were able to infect it experimentally for malignant tertian (zygotes), in one case sixty-six medium and ten small zygotes. It developed also quartan up to zygotes, experimentally. Occurs in India, Federated Malay States. Breeds in puddles and pools with much algae, common in stream beds, water trickling over rocks and lakes with weedy margins. Giles and Liston say that as a rule this species prefers open water and sunlight. Nyssorhynchus maculipalpis. — Stei hens and Christophers found zygotes experimentally in this mosquito, which they called N. jamesii. Occurs in India, Mauritius, Mashonaland. Scarce in Mauritius. Breeding in marshes on sea coast, and at 1,400 feet above sea. Nyssorhynchus stephensi. — Stephens and Christophers [1902]