Vaccination serves as a critical measure for preventing and controlling infectious poultry diseases and enhancing disease resistance. Field technical services frequently observe varying degrees of adverse reactions in poultry following immunization. Below is a summary of essential considerations for oil-based vaccine administration:

I. Vaccine Pre-warming Requirements  

Oil-based vaccines must be pre-warmed to approximately 30°C before injection. Cold vaccines may induce cold stress, leading to poor absorption and the formation of nodules at the injection site, which can compromise immunization efficacy and potentially affect the market value of meat birds.

Recommended method: Place vaccines in a 35°C constant-temperature water bath for 15-20 minutes until stabilized at 30°C. This approach is faster and more controllable than natural room temperature warming.

II. Injection Equipment Sterilization  

All injection equipment must be sterilized by boiling for 10-15 minutes before use. Needles should be changed frequently during operation to effectively reduce cross-contamination risks.

III. Vaccine Mixing Protocols  

When vaccine mixing is necessary, professional equipment such as colloid mills must be used to ensure homogeneous mixing. Irregular methods like container shaking are strictly prohibited. Oil-soluble antibiotics may be added during mixing to reduce bacterial contamination and injection site inflammation. Mixing oil-based vaccines from different manufacturers is forbidden, and combining oil-based vaccines with live vaccines (such as Newcastle disease vaccines) is prohibited.

IV. Operational Essentials  

Administer injections gently and ensure accurate dosing. Maintain continuous agitation of the vaccine during injection to preserve antigen uniformity. Opened vaccines must be used within 24 hours.

V. Injection Site Selection  

Choose appropriate injection sites based on poultry age and breed characteristics:  

- Subcutaneous injection: Neck/back region, inguinal area  

- Intramuscular injection: Breast muscle, leg muscle, wing muscle

Adherence to these operational standards ensures optimal immunization outcomes while minimizing adverse reactions.