Because they are antibiotics, low bioburden of these formulations would be expected at the time of batching. 因為它們是抗生素，所以在定量的時(shí)候處方里有較低的微生物污染水平。
Why would the laser tweezers be a suoerior method to dilution and liquid enrichment for obtaining an organism present in a sanple in low numbers? 在顯微鏡下，激光產(chǎn)生力拖動(dòng)需要的微生物，轉移至滅菌的培養基上，而經(jīng)典的方法沒(méi)能培養很多微生物。
