What to Do About Pig Vaccine Allergies? Treatment Methods Explained

In the process of raising pigs, vaccinating pigs is a very important task, as it effectively prevents some commonly occurring pig diseases. However, many farmers have found that after vaccinating their pigs, the pigs develop allergic reactions. So what causes this? What symptoms appearing after injection indicate an allergy? And what should we do once an allergy occurs? Follow along with the editor below to read the following article.

1. Causes of Allergies

There are mainly four reasons why pigs develop allergies during vaccination. First, the vaccine contains heterologous foreign proteins, or the vaccine itself was extracted from other specific cells after reproduction, but due to improper handling, it causes an allergy after injection. Second, the vaccine adjuvant is an important factor in inducing allergic reactions in pigs; the mineral oil and other components in the immune adjuvant can cause a series of allergic reactions. Another factor is the differences in the pigs' own bodies; pigs raised under different farming methods, rearing environments, and other conditions have different degrees of allergic reaction to vaccines. Finally, vaccines injected during a sow's pregnancy may affect the piglets, causing an immune allergic reaction after the piglets are born, which is also a type of allergic reaction.

2. Symptom Manifestations

Allergic reactions caused by different degrees and different reasons also show different symptoms. Generally speaking, mild allergies mainly cause symptoms such as reduced appetite and poor spirits; acute allergies, about fifteen minutes after vaccination, cause panting, accelerated breathing, foaming at the mouth, unsteady standing, whole-body convulsions, or reddening of the skin and the appearance of measles-like spots; immediate-type allergies have the fastest reaction speed, generally causing the pig to collapse into shock after the needle is withdrawn or within a few minutes. The main symptoms include high fever, difficulty breathing, foaming at the mouth, inability to stand, and in severe cases, shock and death.

3. Treatment Methods

So when pigs develop allergic reactions after vaccination, we must promptly take treatment measures, otherwise the losses will be severe. Generally speaking, pigs with allergies can be immediately injected with epinephrine hydrochloride at a dosage of 1-2 mL per pig; secondly, 1% atropine sulfate can also be used for intramuscular injection, with a dosage of 3 mL for large pigs and 1 mL for small pigs; if the allergy causes high fever, we need to inject penicillin plus an appropriate amount of compound aminopyrine; if there is reduced appetite, then vitamin immune enhancers can be used; finally, stress reactions can also aggravate allergic reactions, so we should keep the rearing environment quiet and reduce stress reactions.

4. Precautions

Since there is a chance of allergic reactions when vaccinating pigs, we need to make preparations to prevent allergies before injection. Secondly, if the pig has an allergy-prone constitution or has had allergic reactions during previous vaccinations, we can inject adrenaline in advance, which can help prevent allergies. Also, when inoculating with live vaccines, we should choose agents with low allergic reaction rates, and carefully read the instructions when injecting the vaccine. Finally, regarding the selection of pig breeds, it is best to choose pure bloodlines, as they have lower allergic reactions to vaccines and also lower disease incidence.

The above is all the content the editor wants to share with everyone today. I believe everyone now has a general understanding of the causes, symptoms, treatment methods, and precautions before and after injection for pig vaccine allergies, and I hope it will be helpful to everyone.