Isospora hylomysis Colley and Mullin, 1971

Type host: Hylomys suillus Muller, 1840, Lesser gymnure.

Type locality: ASIA: Malaysia, Pahang, Bentong, in Janda Baik.

Geographic distribution: ASIA: Malaysia.

Description of oocyst: Oocyst shape: spheroid to subspheroid; number of walls: 1 (?); wall thickness:1.0; wall characteristics: smooth, greenish yellow, finely striated; L x W: 11.6 x 10.8 (11-12 x 10-12); L/W ratio: 1.1 (1.0-1.3); M: absent; OR: absent; PG: 1. Distinctive features of oocyst: thick, smooth, striated oocyst wall of only 1 layer.

Description of sporocysts and sporozoites: Sporocyst shape: ellipsoid; L x W: 6.6 x 4.8 (6-7 x 4-5); L/W ratio: 1.4 (1.3-1.5); SB: absent; SSB: absent; PSB: absent; SR: present; SR characteristics: scattered, irregular granules; SP: club-shaped, one end narrower than the other, without RB. Distinctive features of sporocyst: ellipsoid shape without SB or RB.

Prevalence: 10 of 21 (48%).

Sporulation: Presumably exogenous. Oocysts were sporulated after 7 days in 2.5 % potassium dichromate solution at 30#&186; C.

Prepatent and patent periods: Unknown.

Site of infection: Unknown. Oocysts recovered from feces.

Materials deposited: The symbiotype host (Frey et al., 1992) skin and skull are in the Medical Ecology Museum, Institute of Medical Research, Kuala Lumpur, Malaysia No. 86558.

Remarks:t This species has not been reported since its original description.

References: Colley and Mullin (1971).