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首页> 外文期刊>Parasitology >Besnoitia neotomofelis n. sp. (Protozoa: Apicomplexa) from the southern plains woodrat ( Neotoma micropus).
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Besnoitia neotomofelis n. sp. (Protozoa: Apicomplexa) from the southern plains woodrat ( Neotoma micropus).

机译：新贝氏疟原虫sp。 （原生动物：Apicomplexa）来自南部平原的伍德拉特（Neotoma micropus）。

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摘要

Certain species of the protozoan genus Besnoitia cause clinical disease in livestock and wildlife. In the present paper a new species, Besnoitia neotomofelis is described from the southern planes woodrat (Neotoma micropus). The parasite was detected by bioassay of woodrat tissues in outbred Swiss Webster mice in an attempt to isolate Toxoplasma gondii. Initially, the organism was misdiagnosed as T. gondii because it was highly pathogenic for mice and its tachyzoites resembled T. gondii tachyzoites. Further studies revealed that it differed structurally and biologically from T. gondii. Tachyzoites were successfully cultivated and maintained in vitro in bovine monocytes and African green monkey kidney cells, and in vivo in mice. Non-dividing, uninucleate tachyzoites were approximately 1 x 5 mum in size. Longitudinally-cut bradyzoites in tissue sections measured 1.5-1.6 x 7.7-9.3 mum. Tissue cysts were microscopic, up to 210 mum long, and were infective orally to mice. Cats fed tissue cysts shed unsporulated 13 x 14 mum sized oocysts. All mice inoculated with B. neotomofelis died of acute besnoitiosis, irrespective of the dose, and Norwegian rats became infected but remained asymptomatic. Entero-epithelial stages (schizonts, gamonts) were found in cats fed tissue cysts. Large (up to 40 x 50 mum) first-generation schizonts developed in the lamina propria of the small intestine of cats. A second generation of small sized (8 mum) schizonts containing 4-8 merozoites was detected in enterocytes of the small intestine. Gamonts and oocysts were seen in goblet cells of the small intestinal epithelium. Tachyzoites were present in mesenteric lymph nodes of cats. Phylogenetic analysis indicated that B. neotomofelis was related to other Besnoitia species from rodents, rabbits, and opossums. Besnoitia neotomofelis is distinct from the 3 other species of Besnoitia, B. wallacei, B. darlingi and B. oryctofelisi that utilize cats as a definitive host.
机译：原生动物Besnoitia的某些物种在牲畜和野生动物中引起临床疾病。在本论文中，从南方飞机伍德拉特（Neotoma micropus）描述了一个新物种，Besnoitia neotomofelis。通过对近交Swiss Webster小鼠的伍德拉特组织进行生物测定来检测该寄生虫，以分离出弓形虫。最初，该生物体被误诊为弓形虫，因为它对小鼠具有高致病性，其速殖子类似于弓形虫速殖子。进一步的研究表明，它与刚地弓形虫在结构和生物学上都不同。速殖子已成功地在牛单核细胞和非洲绿猴肾细胞中体外培养，并在小鼠体内得以成功培养和维持。非分开的单核速殖子的大小约为1 x 5毫米。在组织切片中纵向切割的缓殖子的尺寸为1.5-1.6 x 7.7-9.3毫米。组织囊肿是微观的，最长可达210微米，可口服感染小鼠。喂食组织囊肿的猫散落了13 x 14毫米大小的卵囊。不论剂量如何，所有接种新芽孢杆菌的小鼠均死于急性贝氏菌病，挪威大鼠被感染但无症状。在喂食组织囊肿的猫中发现了肠上皮阶段（裂殖体，gamonts）。在猫小肠固有层中形成的大型第一代裂殖体（最多40 x 50毫米）。在小肠的肠上皮细胞中检测到第二代小型裂殖体（8微米），含有4-8个裂殖子。在小肠上皮的杯状细胞中观察到Gamonts和卵囊。速殖子存在于猫的肠系膜淋巴结中。系统发育分析表明，新芽孢杆菌与啮齿动物，兔子和负鼠的其他Besnoitia物种有关。新贝斯诺氏菌不同于贝诺氏菌的其他3种，华莱氏芽孢杆菌，达林芽孢杆菌和稻瘟病杆菌利用猫作为确定宿主。

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