关于伤寒桿菌抗药菌株形态学的、培养的、生物学性质的问题已有一系列资料,但尚未见到关于其抗原性、免疫原性和毒性问题的报导。本文报导了人工适应于左旋霉素的和用左旋霉素治疗后的病人身上分离得的伤寒桿菌抗药株的上述性质的研究结果。用家兎进行了抗原性研究,对家兎三次免疫,第一、二次用热死菌苗,第三次用活培养, There is a range of information on the morphological, cultural, and biological properties of Salmonella typhi resistant strains, but no reports have been made on their antigenicity, immunogenicity and toxicity. This paper reports the results of studies on the above properties of Salmonella typhimurium resistant strains isolated from patients who have been manually adapted to levomycin and treated with levomycin. The study of antigenicity was carried out in the family housefly. Three vaccinations were carried out on the housefly. The first and second heat-killed bacterins were used. The third live culture,