Leucocytozoon Marchouxi

Synonyms: Leucocytozoon turtur.

Hosts: Various doves and pigeons. Levine (1954) and Levine and Kantor (1959) assembled reports of Leucocytozoon from 17 species of 7 genera of columbiform birds. All but one were probably L. marchouxi. There is only a single report of this species in the domestic pigeon, by Jansen (1952) in South Africa.

Location: The gametocytes are in the white blood cells.

Geographic Distribution: Worldwide.

Prevalence: This species is fairly common in wild doves. Hanson et al. (1957), for example, found it in 1.2% of 392 immature and 6.5% of 72 adult mourning doves (Zenaidura macroura) in Illinois.

Morphology: Levine (1954) redescribed this species. The macrogametes are rounded or elliptical, 8 to 15 by 7 to 11 u with a mean of 12 by 9 u; they stain dark blue with Giemsa's stain and have a compact, reddish nucleus. The microgametocytes are often distorted or ruptured by the smearing process, but if not badly damaged measure 8 to 15 by 5 to ll u with a mean of 11 by 8 u. They stain pale blue with Giemsa's stain and have a very diffuse, pale pink nucleus. Host cell cytoplasm is rarely seen surrounding the microgametocytes and was found in only 26% of the cells parasitized by macrogametes. When present, it forms a narrow border around part of all of the parasite's periphery. The host cell nucleus forms a dark-staining band along about 1/3 of the periphery of the parasite. Young gametocytes were seen only in lymphocytes or, in one case, in a monocyte.

Life Cycle: Unknown.

Pathogenesis: Unknown. There were no signs of illness in the infected mourning doves seen by Levine (1954), even though 4 of them were nestlings and 1 was only 14 days old.