热吸水链霉菌是我国引起农民肺的主要病原之一。我们应用免疫印迹技术动态观察了实验性农民肺家兔免疫血清与热吸水链霉菌抗原组分的免疫反应，结果发现７３ｋＤ多肽具有较强的免疫原性，进一步分离提纯此抗原将有助于农民肺的血清学诊断和发病机制的探讨。 Streptomyces hygroscopicus is one of the main pathogens causing peasant lung in our country. We used immunoblotting technology to dynamically observe the immunological reaction of experimental farmer’s lung serum and Streptomyces thermosensitive antigen components and found that the 73kD polypeptide has strong immunogenicity and further isolation and purification of this antigen will help farmers Serological diagnosis and pathogenesis of lung.