目的　了解山东省附红细胞体 (附红体 )的感染情况。方法　用血涂片、镜检的方法检测山东省 7个地区的不同人群 776人 ,家畜 198只 ,野鼠 114只。结果　全省人群附红体总感染率为7.3%,不同地区的感染率差异有非常显著性 (P <0 .0 1)。比较男女两组之间的感染率差异无显著性(χ2 =0 .436 ,P >0 .0 5 )。年龄组比较 ,青壮年感染率明显高于少年组和老年组 (P <0 .0 5 )。在各种职业人群中 ,屠宰工的附红体感染率明显高于农民、小学生及城镇居民 (P <0 .0 1)。附红体感染率与人体健康状况有关 ,患有肝炎、糖尿病、关节炎等慢性疾病的人群感染率显著高于正常人群 (χ2 =4.375 ,P <0 .0 5 )。羊的附红体感染率为 15 .6 %,牛的感染率为 3.2 %,鼠的感染率为零。感染强度大部分为低度。结论　首次证明山东省人畜间广泛存在附红体感染。 Objective To understand the infection of Eperythrozoon (attached to red body) in Shandong Province. Methods Blood smears and microscopic examination were used to detect 776 different populations, 198 domestic animals and 114 wild animals in 7 districts of Shandong Province. Results The total infection rate of red body in the whole province was 7.3%. The difference of infection rates in different areas was very significant (P <0.01). There was no significant difference in infection rates between men and women (χ2 = 0.366, P> 0.05). In the age group, the infection rate of young adults was significantly higher than that of juvenile group and elderly group (P <0.05). In various occupational groups, slaughter workers had significantly higher infection rates of red body than peasants, pupils and urban residents (P <0.01). The rate of infection with red body was related to human health status. The infection rate of people with chronic diseases such as hepatitis, diabetes and arthritis was significantly higher than that of normal population (χ2 = 4.375, P <0.05). The incidence of red body infection was 15.6% in sheep, 3.2% in cattle and zero in mice. Most of the infection intensity is low. Conclusion It is the first time that there is a widespread presence of red body infection among humans and animals in Shandong Province.