Eimeria inyoni Hertel and
Type host: Sorex
tenellus Merriam, 1895, Inyo shrew.
Type locality: NOTHR AMERICA:
U.S.A., California, Mono County, 22.5 km N, 4 km W, Bridgeport.
Geographic distribution: NORTH
Description of oocyst: Oocyst shape:
number of walls: only 1 obvious layer;
wall thickness: 1.0;
wall characteristics: smooth;
L x W: 21.6 x 19.3 (19-24 x 17-23);
L/W ratio: 1.1 (1.0-1.3);
PG: usually, 1-2, but occasionally up to 7 highly refractile fragments.
Distinctive features of oocyst: highly refractile nature of PGs.
Description of sporocysts and
Sporocyst shape: ovoid;
L x W: 11.9 x 7.4 (10-14 x 6-9);
L/W ratio: 1.6 (1.3-1.9);
SSB: present, slightly wider than SB;
SR characteristics: dispersed granules;
SP: appear to be highly granular, with a distinct RB at one end.
Distinctive features of sporocyst: highly granular appearance of
Prevalence: 1/2 (50%).
Sporulation: Exogenous. Oocysts
sporulatd in 7-10 days in 2.5% (w/v) aqueous potassium
dichromate solution at ~23º C.
Prepatent and patent periods:
Site of infection: Unknown.
Oocysts recovered from feces and intestinal contents.
Materials deposited: Skin,
skull, skeleton and tissues of the symbiotype host are preserved
in the Mammal Division of the MSA, UNM: MSB No. 53229 (NK 7991,
female), S.B. George #1059, 13 August 1983. Photosyntypes in the
USNPC No. 86350.
This species most closely resembles Eimeri suncus
Ahluwalia, Singh, Arora, Mandal and Sarkar, 1979 from the common
hpouse shrew (Suncus murinus) from India, but differs by
having larger oocysts (22 x 19 vs 20 x 15) and by the presence
of a SSB, which E. suncus lacks.
References: Hertel and Duszynski