錐蟲藍
錐蟲藍是一種活體染劑,也是一種較早期、目前較少使用的抗原蟲藥物,在獸醫學中主要用於**犬巴貝斯蟲症**(*Babesia canis*)的輔助治療。 - **臨床要點:** 雖然它能迅速抑制原蟲血症並緩解臨床症狀,但**無法清除感染**。它常被用於穩定重症病患,因為它不像 imidocarb 或 diminazene 等根治性藥物那樣具有嚴重的抗膽鹼能或中樞神經系統毒性。 - **橋接治療:** 由於它無法治癒感染,必須在一個月內使用 imidocarb 或 diminazene 等藥物進行後續的根治性治療。 - **眼科應用:** 在人類和獸醫眼科中,它被用作手術染劑,用於對晶狀體前囊(在白內障手術中促進連續環形撕囊)和視網膜前膜進行染色。 - **實驗室應用:** 在歷史上和現在,它被廣泛用作評估細胞存活率的活體染劑,因為它只能穿透細胞膜受損的死細胞。
作用機制: - **Anti-babesial action:** Trypan blue blocks the **C3b receptor** on both the host erythrocyte membrane and the *Babesia* organism. - **Pathway:** C3b receptor blockade → prevents the parasite from adhering to and entering the erythrocyte → halts parasite replication and suppresses parasitemia. - **Vital Dye Mechanism:** As a vital stain, trypan blue is excluded from viable cells with intact cell membranes but penetrates dead or dying cells, binding to intracellular proteins.
各物種劑量
- Babesiosis (B. canis) · 10 mg/kg · IV · once · IV (only)
- Babesiosis (B. canis) · 10 mg/kg as a 1% solution · IV · once
劑量為持牌獸醫專業人員的臨床參考。請務必對照最新藥品說明書及個別病患確認。
給藥途徑
禁忌症
- Pregnancy (unless maternal benefits strictly outweigh fetal risks)
- Non-intravenous routes for systemic administration
不良反應
- Bluish discoloration of skin, mucous membranes, eyes, urine, and secretions (persists for weeks)
- Teratogenesis (when used systemically)
監測
- Efficacy against Babesia clinical signs
- Erythrocyte counts and hematocrit (Note: bluish plasma may interfere with photometric tests and blood smears)
過量
No specific information located. Calculate dosages carefully to avoid acute toxicity.
VetSheet 藥物參考供持牌獸醫專業人員作臨床決策輔助之用,不能取代專業判斷或廠方最新藥品說明書。