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为什么梅毒首选青霉素治疗?

来源:华人健康网 | 发布时间:2011-03-31 14:54:29 | www.chinesejk.com
  梅毒螺旋体的复制周期为30~33小时,对青霉素非常敏感,一般认为青霉素浓度超过0.03单位/ml可杀灭梅毒螺旋体,但这一浓度需要至少保持7~10日,青霉素有效血清浓度为0.016~1.0单位/ml,增加浓度可提高疗效,但超过上述有效浓度范围将不再提高疗效。在晚期梅毒,螺旋体处于相对不活动状态,分裂繁殖一带需要更长时间,故只有延长疗程,才可能提高疗效。水剂青霉素的半衰期仅为半小时,很难维持血液有效浓度,应用水剂青霉素治疗、疗程不足和疗程不规则常导致三期梅毒发生,故不主张用水剂青霉素治疗神经梅毒以外的各期梅毒。长效青霉素如苄星青霉素和普鲁卡因青霉素肌注后,在组织中形成储药库,在12小时至数日内缓慢释放出青霉素被机体吸收,保持有效血液和组织药物浓度,是治疗梅毒的理想药物。

(编辑:小徐 )

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