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Lankesterella corvi n. sp., a Blood Parasite of the English Rook, Corvus f. frugilegus L.*

1959; Wiley; Volume: 6; Issue: 3 Linguagem: Inglês

10.1111/j.1550-7408.1959.tb04363.x

2375-0804

John Baker, R. Lainson, R. Killick‐Kendrick,

Bird parasitology and diseases

SYNOPSIS. Lankesterella corvi n. sp. (Coccidia, Eimeriidae, Cryptosporidiinae) is described from the rook, Corvus f. frugilegus L. in England. It was found in 36 of 196 fledged rooks less than 1‐year old, but not in 25 nestlings or 38 adults. It was not found in 71 jackdaws ( C. monedula spermologus ) or in 110 other birds of 16 species. Mature sporozoites were found in the erythrocytes and occasionally in other blood cells. They were 6.2 times 2.5 μ, with a central, band‐like nucleus, and cytoplasm which failed to stain with Giemsa's stain. Gametogonic and sporogonic stages, found in the bone‐marrow of one bird, resembled corresponding stages of Eimeria. A fledgling rook was infected experimentally by inoculation of a blood and tissue suspension from an infected bird. Sporozoites appeared in its blood 4 days after inoculation. They appeared to increase slightly in size and their cytoplasm lost its initial affinity for Giemsa's stain during the next few days. Engorged mites ( Ornithonyssus sylviarum ) from the experimentally infected rock contained unchanged sporozoites but no developmental stages of the parasite. A canary could not be infected by intraperitoneal inoculation and feeding of such mites.