现代的伤寒、副伤寒实验诊断仍为传统的血液培养及肥达氏反应 ,因传统的细菌培养所需时间较长 ,难以达到早期诊断目的 ,而肥达氏反应操作繁杂 ,结果不易观察 ,其敏感性、特异性和重复性均不够理想。副伤寒脂多糖 -被动血凝试验(LPS -PHA)对甲型副伤寒的早期快速诊断具有实用价? Modern typhoid and paratyphoid laboratory diagnosis is still the traditional blood culture and Widal reaction, due to the longer time required for traditional bacterial culture, it is difficult to achieve the purpose of early diagnosis, and Widal reaction complicated operation, the results are not easy to observe, the Sensitivity, specificity and repeatability are not ideal. Paratymparin lipopolysaccharide - passive hemagglutination test (LPS-PHA) Paratyphus A rapid early diagnosis of practical price?