Washington J A, Snyder R J, Kohner P C
Antimicrob Agents Chemother. 1976 Jan;9(1):199-200. doi: 10.1128/AAC.9.1.199.
Ampicillin resistance (minimal inhibitory concentration >/=10 mug/ml) in the absence of beta-lactamase activity by Haemophilus influenzae was noted in tests performed with Mueller-Hinton agar containing one lot of supplement C. All strains, except five with known resistance due to beta-lactamase activity, were inhibited by 0.6 mug or less of ampicillin per ml of chocolatized blood agar.
在用含一批补充剂C的穆勒-欣顿琼脂进行的试验中,发现流感嗜血杆菌在无β-内酰胺酶活性的情况下对氨苄西林耐药(最低抑菌浓度≥10μg/ml)。除五株因β-内酰胺酶活性而具有已知耐药性的菌株外,所有菌株在每毫升巧克力血琼脂中被0.6μg或更低浓度的氨苄西林所抑制。