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- n. Plural form of haematozoon.
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By directing the attention of doctors and veterinary surgeons to examination of the blood, study of the endoglobular haematozoa prepared the way for the discovery of the diseases due to trypanosomes which themselves also constitute a new and very important chapter in pathology.
As from 1889, I have classified the endoglobular haematozoa or Haemocytozoa in three genera:
A large number of observers have admitted the existence of several species of malarial haematozoa, but for my part I have always defended the unity of malaria and its haematozoon, and the postulated species described under the names of parasites of tropical malaria, aestivo-autumnal fever, tertian or quartan fever appear to me to constitute simple varieties of the same haematozoon.
In 1889, I studied with Nicolle P. bigeminum and P. ovis in the genus Piroplasma and described the forms of multiplication of these haematozoa.
Trypanosomes are Protozoa, very different from the endoglobular haematozoa; they live in the free state in the plasma and not in a state of inclusion in the red cells or in other anatomical elements; they belong to the class of Flagellidae.
I come now to the examination of my other work on the intracellular haematozoa, the number of which has increased continually since the discovery of Haemamoeba malariae.
Laveran proved the association of haematozoa with malaria in 1880.