Lectures on tropical diseases : being the Lane lectures for 1905 delivered at Cooper Medical College, San Francisco, U.S.A. August 1905 / by Sir Patrick Manson.

  • Manson, Patrick, Sir, 1844-1922.
Date:
1905
Catalogue details

Licence: In copyright

Credit: Lectures on tropical diseases : being the Lane lectures for 1905 delivered at Cooper Medical College, San Francisco, U.S.A. August 1905 / by Sir Patrick Manson. 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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    Filaria diurna and Persians. The blood of tropical man is liable to be infested by the embryos of at least four distinct species of nematode worms. These embryos are named respectively Filaria nocturna, Filaria diurna, Filaria perstans, and Filaria demarquai. They have many fea- tures in common; never- theless experts can readi- ly distinguish them one from the other. F. nocturna is found pretty well all over the tropics and sub-tropics; F. diurna is peculiar to West Africa ; F. perstans is also an African species but occurs in Demerara; F. demarquai is an American species, being confined, so far as we know, to certain of the West India Islands and to Demerara; pos- sibly it occurs in New Guinea and other tropical countries. Of these several blood worms F. nocturna is the best known. As it is in- finitely the most import- ant, as well as the most common, I shall confine my remarks on the blood worms to it. Doubtless the life histories of the other three species, though still very imper- fectly known, resemble that of F. nocturna. Filaria demarquai.