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首页> 外文期刊>Journal of Clinical Microbiology >Identification of a common immunodominant protein in culture filtrates of three Nocardia species and use in etiologic diagnosis of mycetoma.
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Identification of a common immunodominant protein in culture filtrates of three Nocardia species and use in etiologic diagnosis of mycetoma.

机译:鉴定三种诺卡氏菌培养滤液中一种常见的免疫优势蛋白,并将其用于霉菌瘤的病因诊断。

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Diagnosis of systemic nocardiosis has been hampered by difficulty in the rapid isolation and identification of the organism and by the frequent need for invasive biopsies. We show that a 55,000-Mr protein previously found in Nocardia asteroides is also present in N. brasiliensis and N. caviae culture filtrates. We also used the antigen in a dot blot assay to identify patients infected with N. brasiliensis. Sera from patients with mycetoma secondary to N. brasiliensis (n = 6) or Actinomadura madurae (n = 2) and 10 hospitalized controls were tested. Six (100%) of the sera from the patients with nocardial mycetoma had positive dot blots to purified antigen, whereas all 10 of the control sera were negative. Serum from one of two patients infected with A. madurae also reacted with the antigen. Thus, the 55-kilodalton protein appears to be produced by three medically important species of Nocardia and is useful when used in an immunoblot assay for identifying patients infected with these organisms.
机译:由于难以快速分离和鉴定生物体,并且经常需要进行侵入性活检,因此妨碍了系统性心脏病的诊断。我们显示,以前在诺卡氏小行星中发现的55,000-Mr蛋白也存在于巴西猪笼草和猪笼草培养物中。我们还在斑点印迹试验中使用了抗原,以鉴定感染了巴西猪笼草的患者。测试了源自巴西猪奈瑟氏球菌(n = 6)或马杜氏猕猴桃(n = 2)继发性肉瘤的患者的血清和10例住院对照。患有心肌梗塞瘤的患者中有六份(100%)血清对纯化的抗原具有阳性斑点印迹,而对照血清中的所有十份均为阴性。来自马杜氏曲霉感染的两名患者之一的血清也与抗原反应。因此,55-千屈顿蛋白似乎是由诺卡氏菌的三个医学上重要的物种产生的,当用于免疫印迹测定以鉴定感染了这些生物的患者时有用。

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