The present invention is directed to an isolated synthetic tripeptide of formula H-D-Phe-N-Methyl-L-Val-L-Ala-OMe (SEQ ID NO:1), or a derivative thereof, and to the corresponding lipotripeptides, which are specific to Mycobacterium avium subsp. paratuberculosis (Map) S-type strain, as well as derivatives and conjugates thereof. The invention also concerns the use of these antigens in different methods and tests for detecting Map infection, especially by detecting humoral response and cell mediated response of infected animals. The invention is also directed to a genetic signature of Map and a mass spectrometry and NMR spectroscopy signature of Map presence or infection.
本发明涉及一种分离的合成三肽,其
化学式为H-D-Phe-N-Methyl-L-Val-L-Ala-OMe(
SEQ ID NO:1),或其衍
生物,以及相应的脂肽三肽,这些脂肽三肽特异于分枝杆菌亚种牛结核分枝杆菌(Map)S型菌株,以及其衍
生物和结合物。该发明还涉及在不同方法和测试中使用这些抗原来检测Map感染,特别是通过检测感染动物的体液反应和细胞介导反应。该发明还涉及Map的遗传特征和Map存在或感染的质谱和核磁共振谱特征。