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首页> 外文期刊>Parasite >Plasmodium carmelinoi n. sp. (Haemosporida: Plasmodiidae) of the lizard Ameiva ameiva (Squamata: Teiidae) in Amazonian Brazil
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Plasmodium carmelinoi n. sp. (Haemosporida: Plasmodiidae) of the lizard Ameiva ameiva (Squamata: Teiidae) in Amazonian Brazil

机译：Carmelinoi疟原虫sp。巴西亚马逊蜥蜴Ameiva ameiva（Squamata：Teiidae）的（Haemosporida：Plasmodiidae）

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Plasmodium carmelinoi n. sp. is described in the teiid lizard Ameiva ameiva from north Brazil. Following entry of the merozoites into the erythrocyte, the young, uninucleated trophozoites are at first tearshaped and already possess a large vacuole: with growth, they may assume an irregular shape, but eventually become spherical or broadly ovoid. The vacuole reduces the cytoplasm of the parasite to a narrow peripheral band in which nuclear division produces a schizont with 8-12 nuclei. At first the dark, brownish-black pigment granules are restricted to this rim of cytoplasm but latterly become conspicuously concentrated within the vacuole. The mature schizonts are spherical to ovoid and predominantly polar in their position in the erythrocyte. They average 5.4 x 4,9 μm (4.4 x 4.4 - 6.6 x 5,9 μm), shape index 1.1, n = 50: 8-12 merozoites are produced and measure approximately 2.0 x 1,0 μm. Mature gametocytes are also polar in position, and spherical to subspherical. The macrogametocytes measure 5.7 x 5,2 μm (4.4 x 4.0 - 5.9 x 5,1 μm), shape index 1.1, n = 50 and, following staining by Giemsa’s method, possess a compact, pink-staining nucleus and a clear blue, faintly stained cytoplasm. Microgametocytes are slightly larger, 6.0 x 5,0 μm (5.2 x 4.4 – 6.2 x 5,2 μm), shape index 1.2, n = 45. They stain an over-all pink colour due to the dispersed nuclear chromatin. The vacuoles in both the macro- and microgametocytes are considerably smaller than those of the schizonts and of ovoid or spindle shape: they contain most of the pigment granules. The sex ratio, as seen in an inicial intense infection, was 1 male to 2.2 females. Prevalence of infection was low (5 %) but, due to the very low parasitaemia which may result in a failure to detect parasites, it is probably higher than this.
机译：Carmelinoi疟原虫sp。在巴西北部的潮汐蜥蜴Ameiva ameiva中有描述。裂殖子进入红细胞后，年轻的单核滋养体首先呈泪状，并已经具有较大的液泡：随着生长，它们可能呈不规则形状，但最终变为球形或宽卵形。液泡将寄生虫的细胞质减少到一个狭窄的外围带，在该带中核分裂产生具有8-12个核的裂殖体。起初，深色，棕黑色颜料颗粒局限于细胞质的边缘，但随后明显地集中在液泡中。成熟的裂殖体为球形至卵球形，在红细胞中的位置主要为极性。它们平均5.4 x 4.9μm（4.4 x 4.4-6.6 x 5.9μm），形状指数1.1，n = 50：产生8-12个裂殖子，尺寸约为2.0 x 1,0μm。成熟的配子细胞在位置上也是极性的，从球形到亚球形。巨配子体细胞大小为5.7 x 5,2μm（4.4 x 4.0-5.9 x 5,1μm），形状指数1.1，n = 50，经吉姆萨（Giemsa）方法染色后，具有紧密的粉红色染色核和透明的蓝色，细胞质淡淡染色。微配子细胞稍大，为6.0 x 5.0微米（5.2 x 4.4 – 6.2 x 5.2微米），形状指数1.2，n =45。由于核染色质的分散，它们使整个粉红色染色。巨配子细胞和微配子细胞中的空泡都比裂殖体的空泡小得多，卵形或纺锤形：它们含有大多数色素颗粒。如在严重的感染中所见，性别比为1男性对2.2女性。感染的发生率很低（5％），但是由于寄生虫血症非常低，可能导致无法检测到寄生虫，因此感染率可能高于此水平。

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