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Related to piroplasm: piroplasmosis, Merozoites


(invertebrate zoology)
The type genus of the Babesiidae, a protozoan family containing red blood cell parasites.



(or Piroplasma), a genus of protozoa of the order Piroplasmidae, class Sarcodina. The name was given in 1893 in honor of the Rumanian scholar V. Babe§, who first discovered the parasites in 1888 in the blood of cattle.

Some authors divide the genus Babesia into four genera or subgenera (Piroplasma. Nuttallla, Babesiella, and Franca-iella). Babesias are blood parasites of cattle, horses, sheep, pigs, and dogs. They cause a serious disease, babesiasis. In the erythrocytes of mammals babesias multiply asexually, with each one dividing into two or four organisms. Babesias are transmitted by ticks, in whom they reproduce asexually in the intestinal tract or in the intracellular spaces. In this situation forms of babesias can orginate in the ovule of the tick and remain there multiplying asexually. From such infected tick eggs come larvae with babesias in all their organs and salivary glands. When a tick sucks the blood of a vertebrate animal, babesias are transmitted to that organism and they then become lodged in the erythrocytes. In the USSR there are ten species; the main ones are B. bigemina (Piro-plasma bigeminum), B. bovis (Piroplasma bovis, Babesiella bovis), and B. ovis (Piroplasma ovis, Babesiella ovis).


Dogel’, V. A., Iu. 1. Polianskii, and E. M. Kheisin. Obshchaia
protozoologiia. Moscow-Leningrad, 1962.
Levine, N. D. Protozoan Parasites of Domestic Animals and of Man. Minneapolis, 1961.


References in periodicals archive ?
The use of molecular diagnosis (PCR plus sequencing) demonstrated that the piroplasm used in the experimental infections was unequivocally B.
Although the appropriate position for this clade in phylogenetic analyses of the piroplasms remains unclear (14), the position is remote from B.
Microscopic examination Thin blood smears were fixed in methanol for 10 min and stained in Giemsa diluted at 5% with buffer solution for 30 min and examined, at 1000x magnification for the presence of Theileria piroplasms (Durrani et al.
Given the low level of Babesia DNA in the placenta tissue, it is not surprising that histologic examination did not reveal piroplasms.
microti in sites where these piroplasms coexist (11).
Examination of ear tip blood smear stained with Giemsa stain showed presence of Theileria annulata piroplasms in large number of RBCs (Fig.
The merozoites invade erythrocytes and develop into piroplasms (Radostits et al.
Babesiosis is a zoonosis caused by intraerythrocytic piroplasms of the genus Babesia, which are transmitted by ticks (1).
However, piroplasms in abnormal hosts or hosts that are not generally considered primary hosts may have morphologic differences (12).