Eimeria firestonei Bray, 1958
Type host: Crocidura poensis
(Fraser, 1843) (Syn. C. shweitzeri), White-toothed shrew.
Type locality: AFRICA:
Liberia, Marshall Territory, presumably near Harbel.
Description of oocyst: Oocyst shape:
number of walls: 1;
wall thickness: <1.0;
wall characteristics: smooth, thin, fractures easily;
L x W: 19.1 x 16.2 (18-20 x 15-18);
L/W ratio: 1.2;
Distinctive features of oocyst: thin, smooth wall of only 1
layer that ruptures easily.
Description of sporocysts and
Sporocyst shape: elongate ovoid;
L x W: 10.5 x 7.3 (10-11 x 7-8);
L/W ratio: 1.4;
SR characteristics: scattered small granules;
SP: vermicular, 4 x 3, with metachromatic granules, but no obvious RB
Distinctive features of sporocyst: pointed ovoid shape with
vermicular SPs (however, see Remarks).
Prevalence: 2/6 (33%). in 2/3 adults,
but 0/3 neonates.
Sporulation: Exogenous. Oocysts
sporulated in 3-4 days in 2% chromic acid (?) solution.
Prepatent and patent periods:
Site of infection: Gametocytes
were (presumably) seen in epithelial cells of the ileum. Oocysts
were recovered from feces in rectal contents.
Materials deposited: None
measurements of the SP, and the components of the original line
drawing (Bray, 1958), suggest that either the SPs were
degenerate, or that the RBs were confused with the SPs and were
the structures actually measured; he also noted (incorrectly) that
sporulated oocysts of this species somewhat resemble E. soricis
described by Henry (1932) from Sorex ornatus californicus.
However, the oocysts of this species have a thicker wall, possess no
PGs and have a mean L/W ratio of 1.2 vs 1.3-1.4. In addition, there are
differences in host genus and continent. This species has not been
reported since its original description.
References: Bray (1958).