大肠杆菌变异毒素A和B定量培养
此检测可以检测出您粪便中大肠杆菌毒素A和B的存在，这些毒素可能导致严重腹泻和肠道炎症。同时，还需要在实验室中培养细菌以确认感染情况。
["用于诊断由大肠杆菌感染引起的常见抗生素相关腹泻。"]
关键信息一览
- LOINC
- 562-9
- 简码
- CDIFCULT
- 别名
- C diff Stl Ql Cult
- 类别
- 生化
- 样本
- stool
- 采血管
- Sterile, leak-proof, wide-mouth container with screw-cap lid; anaerobic transport swab or stool culture transport system (e.g., Cary-Blair medium) for culture preservation; do not use preservative tubes (such as those containing formalin or PVA) intended for parasitology
- 单位
- N/A
- 是否空腹
- 否
- 适用人群
- 成人
- 性别
- all
- 年龄范围
- ≥ 0 岁
- 检测方法
- organism-specific-culture
- CPT
- 87081
- SNOMED
- 121000599106
- 标本量
- 5-10 grams of fresh stool (approximately 1-2 teaspoons); a minimum of 1-2 mL of liquid stool or 5 g of formed stool is generally required. Rectal swabs are acceptable alternatives in patients unable to produce stool, particularly in cases of ileus.
- 标本稳定性
- Unpreserved stool: room temperature (20-25°C) for up to 2 hours; refrigerated (2-8°C) for up to 24-48 hours (preferably process within 24 hours). In anaerobic or Cary-Blair transport medium: room temperature up to 24-48 hours; refrigerated (2-8°C) up to 72 hours. Do not freeze. Specimens delayed beyond recommended stability may yield false-negative results due to organism die-off.
- 报告时间
- 48–120 小时
- 医嘱频率
- routine
为什么要进行此项检查？
医生可能建议进行此检查，如果您出现严重腹泻、腹痛或发热等症状——特别是在服用抗生素后，因为抗生素可能破坏肠道健康菌群。此外，在医院环境中，也用于监测患有反复感染的患者。
检测前准备
不需要特殊准备。请携带您正在服用的所有药物，因为某些抗生素可能会影响结果。避免某些食物或补充品（如益生菌）可能会干扰检测，但请先咨询医生。
检测过程
从您的粪便中采集少量样本，送至实验室进行检测。样本通过特殊培养方法检测毒素A和B，以确定大肠杆菌是否产生有害毒素。
结果解释
阳性结果表明大肠杆菌毒素存在，可能导致感染。阴性结果表示未检测到毒素，但可能仍需进一步检测（如粪便抗原检测）以排除其他症状原因。
Reference range
Negative for Clostridioides difficile by culture. Culture is generally considered positive when toxigenic C. difficile is isolated; however, recovery of the organism by culture alone does not differentiate toxigenic from non-toxigenic strains. Results should be interpreted in conjunction with clinical findings, stool consistency (typically only unformed/loose stools are tested), and patient history including recent antibiotic exposure.N/A
No fasting required. Patient should ideally not be on anti-diarrheal medications (e.g., loperamide, diphenoxylate/atropine) prior to specimen collection as these may interfere with recovery of the organism. Specimens should be collected before initiating empirical anti-C. difficile antibiotic therapy (e.g., metronidazole, vancomycin, fidaxomicin) whenever possible. Patients should avoid contaminating stool with urine or toilet water. Inform laboratory if patient has been hospitalized, resides in a long-term care facility, or has a recent history of antibiotic use within the past 8 weeks.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
临床意义
简称
大肠杆菌毒素检测（培养基依赖）
常见问题
我需要多少次进行此检测？
大肠杆菌感染的最常见症状是什么？
如何预防大肠杆菌感染？
本信息仅供教育用途，不能替代专业医疗建议、诊断或治疗。
本内容仅供一般信息和教育用途，不能替代专业医疗建议、诊断或治疗。对于任何医疗问题，请务必咨询合格的医疗服务提供者；切勿因阅读本站内容而忽视专业医疗建议或推迟就医。
如果您认为自己可能出现医疗紧急情况，请立即拨打当地急救电话或前往最近的急诊科。
医学审核:WellAlly 编辑团队 最后审核 2026年8月15日. · 阅读我们的编辑政策