a. Completely depopulate the infected premises (removing all birds as well as all used feed supplies, removable equipment, and supply items that may be contaminated) to establish a "MG-free" flock. b. Remove all of the litter and manure completely. c. Wash down all inside surfaces (walls, ceilings, rafters, ventilation openings, air intake ducts, etc.) with a high pressure washer using a large volume of water. The addition of a cleaning agent speeds up and improves the process. d. Disinfect all of the interior surfaces of the building with recommended concentration of phenolic or cresylic acid disinfectant solution. Chlorine bleach solution (.025%) may be substituted for phenol or cresylic acid solutions. e. Spray the entire floor area, the lower three to four feet of the support poles, the perimeter walls, and the area outside the entrance with 0.1% glutaraldehyde solution at one gallon per 10 square feet. Also, spray a five- to ten- foot band around the entire outside perimeter to prevent contamination from outside the building. Close up the building and make it tight without any ventilation until the next day, and then open it up and air out the formaldehyde fumes. f. Spray the entire floor area, support poles, and side walls with carbaryl insecticide at recommended levels to control insect pests. Malathion may be added to, and applied with, the cresylic acid spray in place of the separated carbaryl applications. g. Bring back the necessary removable equipment that has been cleaned and disinfected and bring in feed and supply items that are also clean and not contaminated with pathogens. h. Allow the buildings to remain empty for at least two weeks after cleanout. i. Always consider the area outside the building contaminated, particularly if the previous flock had MG. Set up your traffic pattern to prevent recontaminating the building from the area outside. j. Obtain chicks hatched from eggs from MG-free breeder flocks, hatched in a hatchery where no infected eggs are set, and delivered in "MG-free" trucks by people who have no contact with infected birds. k. Farm workers go from younger to older birds (not vice-versa) if mutliple ages are present on the farm and cared for by the same person. l. Have only one age group on the farm (all-in, all-out) or have barns adequately separated (about 650 feet or more) and treat each age group as a separate unit. Clean up and disinfect barns between flocks. m. Enforce regulations on clothing and footwear worn by flock caretakers, servicemen, and equipment repairmen that move between flocks and farms. You can significantly influence the security and isolation of a healthy flock from the rest. Use "on-farm" clothing (including coveralls, boots, hats, etc.) in poultry barns. n. Feed truck, egg pick-up, and other service vehicle drivers must stay in the truck if servicing both infected and free farms (or if that is not possible, avoid the barn entrance area). |