The malarial fevers, haemoglobinuric fever and the blood protozoa of man / by Charles F. Craig ; illustrated by four colored plates, twenty-five clinical charts, and twenty-eight photomicrographs and drawings.

  • Craig, Charles Franklin, 1872-1950.
Date:
1909
Catalogue details

Licence: Public Domain Mark

Credit: The malarial fevers, haemoglobinuric fever and the blood protozoa of man / by Charles F. Craig ; illustrated by four colored plates, twenty-five clinical charts, and twenty-eight photomicrographs and drawings. Source: Wellcome Collection.

Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.

    35/520 (page 15)
    Germany, Italy, and in tropical regions, as India and Africa, but considerable uncertainty exists as to the species concerned in the production of the various forms of aestivo-autumnal infection. The Italian authorities, together with nearly every investigator who has studied malaria in the tropics, have made a subdivision of the aestivo-autumnal parasite into at least two varieties, the quotidian and the tertian, and a great amount of labor has been expended in differentiating these varieties and in endeavoring to demonstrate their specific characteristics. From personal experience I have no hesitation in stating that the tertian and quotidian aestivo-autumnal plasmodia can be as easily differen- tiated as the benign tertian and quartan plasmodia, when suitable material is available for study, and while I cannot accept the existence of a pigmented and unpigmented quotidian aestivo-autumnal parasite, I believe that the aestivo-autumnal infections are produced by two distinct organisms, the quotidian and the tertian aestivo-autumnal plasmodium. Several of the classifications proposed for the parasites of malaria are of interest and will be briefly noticed. Labbe's Classification.—Labbe placed all of the blood parasites belong- ing to the Protozoa in the Sporozoa, dividing them into two classes: Haemo- sporidia and Gymnasporidia, in the latter division placing the malarial parasites of man as well as the Halteridiiim and Proteosoma of birds. Kruse's Classification.—Kruse divides the Sporozoa into four orders, placing the malarial parasites in the Gregarinida, sub-order Haemogregarinidcr; genus Plasmodium, the generic term first given by Marchiafava and Celli. Grassi and Feletti's Classification.—These authors placed all of the malarial parasites in two genera: Haemamoeha Sind Laverania. In the genus Haemamoeba, they mention four species of malarial parasites as occurring in man: H. malaria (quartan), H. vivax. (tertian), H. praecox. (pernicious), and H. immaculata (pernicious). In the genus Laverania, they place the crescentic parasites, giving them the specific name '^Laverania malarice.^' Neither the generic or specific name in this instance can stand, as both were founded upon the belief that the crescents were a distinct species of parasite. IVIannaberg's Classification.—Mannaberg divides the malarial para- sites as follows: 1. Malarial parasites that sporulate, but do not form syzygies (crescents). a. Quartan plasmodium. b. Tertian Plasmodium. 2. Malarial parasites that sporulate and form syzygies (crescents). a. Pigmented quotidian plasmodium. b. Non-pigmented quotidian plasmodium. c. Malignant tertian plasmodium. Thayer and Hewetson's Classification.—In their classical work upon the malarial fevers Thayer and Hewetson divide the parasites of malaria into three species, the tertian, quartan and aestivo-autumnal parasites. Sacharoff's Classification.—Sacharoff divides the plasmodia into two