A plasmid which contains a genetic code for an immunogenic portion which is conserved in many strains of nontypable Haemophilus influenzae and the bacterium containing this plasmid is disclosed. The immunogenic portion is preferably an epitope on an outer membrane protein of H. influenzae. A monoclonal antibody to the immunogenic portion and the hybridoma which will produce the monoclonal antibody is also included. The invention further includes a DNA probe constructed to correspond to the nucleic acids which code for the immunogenic portion. This probe may be labelled with a radioactive marker and may be used as a diagnostic tool to assay various clinical samples for the presence of H. influenzae.
                            本文介绍了一种质粒,其中包含一个免疫原性部分的
基因编码,该部分在许多无类型流感嗜血杆菌菌株中是保守的,并且包含该质粒的细菌。该免疫原性部分最好是H. influenzae外膜蛋白上的表位。本发明还包括针对免疫原性部分的单克隆
抗体和将产生单克隆
抗体的杂交瘤。该发明还包括构建的DNA探针,以对应编码免疫原性部分的核酸。该探针可以用放射性标记标记,并可用作诊断工具,以检测各种临床样本中是否存在H. influenzae。