here is my opinion, for refference.
Chronic Pleuropneumoniae in Pigs, is respiratory disease. so need treat from three aspects
1) pig farms environment: sterilize, ventilate,light .keep hog house clean
2) control disease: pleuritis mainly caused by PRRS, PCV ,Actinobacillus these pathogens. Thus need to kill pig internal pathogens. Dont advice antibiotics with drug resistance and residual which acuse second complication for the pigs, what's more, Argentina control the dosage of antibiotics, right?
here is a new feed additive called antimicrobial peptides, short for AMP, you can find many information on Google. its huge effects on killing pathogens and improving animal immunity has been approved by world scientist. and its no drug resistance and residual, strong heat resistance, thought to be best substitution for antibiotics..
importance that AMP just need add about 500 ppm in feed directly and easy to use. AMP can increase feed intake and FCR, promote growth greatly.
you can get more details from alibaba.com by search Sichuan Rota Bioengineering.
3)improve feed quality: this way is also to improve pigs health condition.in a world, improve pig level to resist external pathogens.