Purchase stock with EP but, depending on the health status of the herd, make sure the pigs are free from swine dysentery, mange, App and PRRS.
Carry out isolation and monitoring procedures as above. Six weeks instead of eight weeks is probably enough. If your herd has a low health status and is intensively housed it may be helpful to medicate the feed for the incoming stock if they are EP free. Use lincomycin, tiamulin or tilmicosin for the last two weeks in isolation, or the first four weeks in your herd. This allows them to become immune without becoming ill. Discuss with your veterinarian.
Keep a broad parity spread in your sows. Sows of second parity onwards are more immune than first litter gilts and pass a better immunity to their piglets.
Check the faeces of the growing pigs for ascarids and if present keep them under control by routine worming and all-in all-out housing procedures.
If you are having clinical problems and poor growth later in growing pigs vaccinate young piglets against EP as per manufacturers instructions.