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通过流感流行期观察公共场所空气中溶血性链球菌（ＨＳ）含量发现：ＨＳ检出率由非流行期的４４．２％增至７７．８％（Ｐ＜０．０５），ＨＳ＞３６ｃｆｕ／ｍ３由７．９％增至４４．２％（Ｐ＜０．０１），ＨＳ＞３６ｃｆｕ／ｍ３，最大倍数由２．２增至１１．１（Ｐ＜０．０１），以低档场所污染最严重。同时在血平皿上还发现有一种轻度溶血圈的脓绿色Ｇ氏阳性球菌落（７６．２％）。然而细菌总数（ＢＴ）无一例超标。提示：ＨＳ是一种直接反映在人群生理活动和呼吸系统传染病流行的灵敏指标，ＨＳ≤３６ｃｆｕ／ｍ３有可操作性和实用性
The prevalence of hemolytic streptococcus (HS) in the air of public places during the pandemic period of influenza shows that the detection rate of HS increased from 44.2% in non-epidemic period to 77.8% (P <0.05), HS> 36cfu / m3 increased from 7.9% to 44.2% (P <0.01), HS> 36cfu / m3, and the maximum multiple increased from 2.2 to 11.1 (P <0.01) serious. Meanwhile, a pus-positive G-positive colony (76.2%) was also found on the blood plate. However, none of the total bacterial count (BT) exceeded the standard. Hint: HS is a sensitive index directly reflected in the crowd’s physiological activity and the epidemic of respiratory diseases, HS≤36cfu / m3 has practicability and practicability