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Does diluting the vaccine with PBS for chicken injection affect the titer due to pH and osmolality deviations?

Lab Techniques
Asked by:大师小哥1267 2026-09-05 Views 214 4 answers
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All Answers4
张
张磊 2026-09-19
用量2L,如果买10L大包装液体,开封后保存是个问题。液体PBS开封后容易长菌,不建议整桶反复抽取;可先分装成500 mL或1 L无菌瓶,但普通养殖场分装很难保证无菌。干粉包装更耐放,但要防潮,开封后扎紧密封。从成本看10L液体单价可能更低,但要确认自己能否在一个月内用完;否则粉剂小包装更稳。
C
CellHub8029 2026-08-08
渗透压和离子浓度方面,稀释用PBS应接近等渗,一般在280-310 mOsm/kg;磷酸盐浓度常用0.01 M左右,氯化钠约0.85%。过高或过低都可能刺激鸡群鼻黏膜或改变病毒存活环境。买粉剂后最好用纯化水按说明配,定容准确,别随意估计水量。如果有条件,配好后用渗透压仪测一下,至少每批抽测。
郭
郭勇6267 2026-09-12
细胞培养级PBS能否直接给鸡用,要看成分表。多数细胞培养级PBS无钙镁、无菌、内毒素低,理论上可以作为一般稀释用,但如果含有酚红、EDTA或抗凝剂等额外成分,就不建议直接用于疫苗稀释。养殖场建议优先用疫苗厂家推荐的专用稀释液;如果必须替代,找无酚红、无EDTA的PBS,并先做小群试验观察应激和接种反应。
A
AndyElisa7332 2026-08-04
pH偏碱确实可能影响疫苗中活病毒的稳定性。禽用活疫苗稀释后应尽快使用,稀释液pH一般建议在7.0-7.4,偏碱尤其超过7.8时可能加快病毒失活。配完PBS后要用校准过的pH计测,偏碱可用少量盐酸或换用酸性配方微调,不要凭试纸估算。若效价持续不稳,先排除稀释液pH和现配现用时间。
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