单份标本:若阳性效价达1∶100以上,证明受过感染,自细菌入侵一周起,该效价可存在数年。极高的效价和不同程度的交叉反应可作为新近感染指徵,但也不完全可靠,因凝集抗体能在几年内保持一定水平。效价达1∶1600以上,表明近来的或现在的感染。阴性结果特别是取材于病程早期不能排除感染的可能。多次标本检查同时有明显的效价增长:双份血清检查证实有明显的效价增长,才是 A single copy: If the positive titer of 1: 100 or more, proved infected, since the week of bacterial invasion, the titer can exist for several years. High titer and varying degrees of cross-reaction can be used as indications of recent infection, but not entirely reliable, because agglutinated antibodies can maintain a certain level within a few years. Titer above 1: 1600, indicating recent or current infection. Negative results, especially from the early stages of the disease can not rule out the possibility of infection. Multiple specimen examinations at the same time there is a significant increase in potency: double serum test confirmed significant increase in potency, is