Isospora aranei Golemansky, 1978 emend. (syn. I. araneae Golemansky, 1978)
Type host: Sorex araneus Linnaeus, 1758, Eurasian common shrew.
Other hosts: None to date.
Type locality: EUROPE: Bulgaria, area of the Rila Mountains.
Geographic distribution: EUROPE: Bulgaria.
Description of oocyst: Oocyst shape: spheroid to subspheriod;
number of walls: 2;
wall thickness: unknown, but probably ~1.0;
wall characteristics: outer, colorless, smooth, ~2/3 of total.;
L x W: 17 x 17 (spheroid), 16-18.5 x 15-18 (subspheroid);
L/W ratio: 1.0;
Distinctive features of oocyst: none.
Description of sporocysts and sporozoites:
Sporocyst shape: ovoid;
L x W: 12.5 x 9.5;
L/W ratio: 1.3;
SB: absent (?--see line drawing);
SR characteristics: diffuse, small granules between the SP;
SP: with a distinct RB at one end (line drawing), although this was not stated in the original description.
Distinctive features of sporocyst: ovoid shape without a SB.
Prevalence: 2/52 (4%).
Sporulation: Exogenous. Oocysts sporulated in 48 hours in 3% aqueous potassium
dichromate solution at 24 C.
Prepatent and patent periods: Unknown.
Site of infection: Unknown. Oocysts recovered from feces and intestinal contents.
Materials deposited: None.
Remarks: Golemansky's (1978) original desciption did not mention the
presence of a SB on the sporocyst; however, his line drawing showed that one end of the sporocyst is
distinctly pointed, a structural feature that usually indicates a SB is present. This species was
reported again by Golemansky (1979) from S. araneus from the Parangalista Reserve, Bulgaria; it is
not clear if these are the same host animals used in the original description (see Remarks under
References: Golemansky (1978, 1979).