Isospora schmaltzi Yakimoff and Gousseff, 1936

Type host: Erinaceous europaeus Linnaeus, 1758, Eurasian hedgehog.

Type locality: EUROPE: Russia. Polotzk District, Leningrad Zoo.

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; M: absent; OR: present; PG: 1-2. 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; SSB: absent; PSB: absent; SR: present, althoug original drawing shows sporocyst filled with graules and, thus, it may not have completed sporulation; SP: unknown. Distinctive features of sporocyst: SR granules that may fill it.

Prevalence: 1 of 34 (3%)

Sporulation: Unknown.

Prepatent and patent periods: Unknown.

Site of infection: Unknown. Oocysts recovered from feces.

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 (1969).