in the early days 960 eneotic pneumonia was often treated by medicating with tetracycline and although this did not give a total cure, the impact of pneumonia in the fattening period was usually greatly reduced. There was evidence to suggest that during the 1970s and 80s there was a decreasing susceptiblity to chlortetracycline in isolates of M. hyopneumoniae
Initially programmes combining in feed and water treatments with tylosin were quite succe although the impact of tylosin on lung lesions varied probably depending on which secondary agents were involved
Lincomycin was also used with some success, as was tamulin or combinations of land chlotetracycline or oxytetracycline. More recently, newer antibiotics such as the pleuro quinolones have been used with some success
Looking to the future, the current public concern over the use of antibiotics means that alterative strategies to control erotic pneumonia will be sought and these may well focus on prevention

Obviously it goes without saying that the provision of an optimum environment, ventilation and stocking densities are a pre-requisite to any strategy aimed at preventing respiratory dise
Historically various schemes have been used to confirm the freedom of enotic preumonia in a herd including abattoir checks on plucks (lungs) and emphasis was given to the creation and keeping of enzootic pneumonia-free herds. To this end medicated early weaning systems were used, for example the swean system
In such an approach piglets were weaned early from sows that had been medicated and removed to an isolated location for onwards rearing Such a system was not M. hyopneumoniae specific, but also controlled other pathogens, such as Bordetella bronchiseptica
More recently, vaccination against M. hyopneumoniae infection has been practised with some success