Isospora schmaltzi Yakimoff and Gousseff, 1936
Type host: Erinaceous europaeus Linnaeus,
1758, Eurasian hedgehog.
Type locality: EUROPE: Russia. Polotzk District,
Geographic distribution: EUROPE: Russia.
Description of oocyst: Oocyst shape: spheroid;
number of walls: 1
wall thickness: unknown, but probably <1.0;
wall characteristics: outer layer colorless, apparently smooth;
L x W: 24-28 x 24-28;
L/W ratio: 1.0;
Distinctive features of oocyst: presence of both OR and PG.
Description of sporocysts and sporozoites:
Sporocyst shape: ovoid;
L x W: unknown;
SB: absent, although the original line drawing shows one end to be pointed;
SR: present, althoug original drawing shows sporocyst filled with graules and, thus, it may
not have completed sporulation;
Distinctive features of sporocyst: SR granules that may fill it.
Prevalence: 1 of 34 (3%)
Prepatent and patent periods: Unknown.
Site of infection: Unknown. Oocysts recovered from
Materials deposited: None.
Remarks: The description of this species is only
marginally useful; it is retained as valid only because an original line drawing of a
sporulated (?) oocyst and some oocyst measurements were included and because later
authors have supplied additional information. There is no indication that Yakimoff and
Gousseff (1936) ever saw completely sporulated oocysts. However, Glebezdin and
Kolodenko (1969) reported finding this species in hedgehogs in Turkmenia. The oocysts
they found were round and measured 26.8 (23.5-29) and the sporocysts 11.1 x 8.6
(10.5-12 x 8.5-9); they did not give a line drawing or photomicrograph.
References: Yakimoff and Gousseff
(1936, 1940); Glebezdin and Kolodenko