傷寒的細菌學診斷包括自病人之血液、糞便、骨髓中分離傷寒桿菌,以形態、培養、生化特性及血清學上諸方法鑑定已分離之細菌,傷寒菌之分離,有時很易,但有時却較困難,而病程的進展與標本的選取則為協助診斷的重要因素之一。如在患病的第一星期內,容易從血液中培養出病原菌,後來血 The bacteriological diagnosis of typhoid fever involves the isolation of typhoid bacillus from the patient’s blood, faeces, and bone marrow. Identification of bacteria that have been isolated by morphology, culture, biochemical properties, and serological methods. The isolation of typhoid bacteria is sometimes easy, but there are However, it is more difficult, and the progress of the disease and the selection of specimens are one of the important factors in assisting diagnosis. In the first week of illness, it is easy to cultivate pathogens from the blood, and later blood