But recent shortages in the supply of the drug benzathine penicillin made it more difficult to control syphilis, the WHO study said.
但世卫组织的研究称，最近苄星青霉素供应短缺，导致控制梅毒病情的难度加大。
Benzathine penicillin
原声例句
VOA Special 2019年6月合集
英语百科
Benzathine benzylpenicillin
（重定向自Benzathine penicillin）
Benzathine benzylpenicillin (rINN) is a form of penicillin also known as benzathine penicillin. It is an antibiotic useful for the treatment of a number of bacterial infections.
It is slowly absorbed into the circulation, after intramuscular injection, and hydrolysed to benzylpenicillin in vivo. It is the drug-of-choice when prolonged low concentrations of benzylpenicillin are required and appropriate, allowing prolonged antibiotic action over 2–4 weeks after a single IM dose. It is marketed by Wyeth under the trade name Bicillin L-A.
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