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.

Geographic distribution: AFRICA: Liberia.

Description of oocyst: Oocyst shape: ovoid; 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; M: absent; OR: absent; PG: absent; Distinctive features of oocyst: thin, smooth wall of only 1 layer that ruptures easily.

Description of sporocysts and sporozoites: Sporocyst shape: elongate ovoid; L x W: 10.5 x 7.3 (10-11 x 7-8); L/W ratio: 1.4; SB: present; SSB: absent; PSB: absent; SR: present; SR characteristics: scattered small granules; SP: vermicular, 4 x 3, with metachromatic granules, but no obvious RB (line drawing). 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: Unknown.

Site of infection: Gametocytes were (presumably) seen in epithelial cells of the ileum. Oocysts were recovered from feces in rectal contents.

Materials deposited: None

Remarks: The 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).