Vaccine composition, preparation method and application thereof

Abstract

The invention provides a vaccine composition, which comprises an immune amount of a porcine circovirus antigen, an immune amount of a mycoplasma hyopneumoniae antigen, and levamisole or its derivative, and a polymer. The vaccine composition not only can have an immunological enhancement effect on two antigens at the same time, but also has stability, and can be used for dilution of porcine reproductive and respiratory syndrome live vaccines.

Description

technical field [0001] The invention relates to a vaccine composition, in particular to a dual vaccine composition of porcine circovirus and mycoplasma hyopneumoniae. Background technique [0002] Porcine circovirus (PCV) is the smallest animal virus ever discovered. PCV is known to have two serotypes, PCV1 and PCV2. PCV1 is a non-pathogenic virus. PCV2 is a pathogenic virus that is the main cause of multisystemic wasting syndrome (PMWS) in weaned piglets. The clinical features of PMWS include weight loss, pale skin, dyspnea, diarrhea, and jaundice. Pathological changes can be seen systemic lymph node enlargement, especially inguinal lymph node enlargement up to 5 to 10 times; the lungs mainly show diffuse and interstitial pneumonia changes, the texture is as hard as rubber, and the surface generally has a taupe mottled appearance; the kidney There are many changes, white necrotic lesions of different sizes can be seen scattered in the cortex and medulla, which appear wa...

AI Technical Summary

Problems solved by technology

[0004] Mycoplasma hyopneumoniae has very strict requirements on the nutritional conditions of the culture medium, and it is difficult to grow

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