a microscopic scientific illustration displaying chain formations of erysipelas streptococcus bacteria inside a circular frame - 鏈球菌 幅插畫檔、美工圖案、卡通及圖標
microscopic view of bacterial pneumonia. bacterial pneumonia is a type of pneumonia caused by bacterial infection. - 鏈球菌 幅插畫檔、美工圖案、卡通及圖標