21 CFR 118.7 - Sampling methodology for Salmonella Enteritidis (SE).
(a) Environmental sampling. An environmental test must be done for each poultry house in accordance with § 118.5 (a) and (b). Within each poultry house, you must sample the environment using a sampling plan appropriate to the poultry house layout.
(b) Egg sampling. When you conduct an egg test required under § 118.6, you must collect and test the following number of eggs from the positive poultry house:
(1) To meet the egg testing requirements of § 118.6(c), you must collect and deliver for testing a minimum of 1,000 intact eggs representative of a day's production. The 1,000-egg sample must be tested according to § 118.8. You must collect and test four 1,000-egg samples at 2-week intervals for a total of 4,000 eggs.
(2) To meet the monthly egg testing requirement of § 118.6(e), you must collect and deliver for testing a minimum of 1,000 intact eggs representative of a day's production per month for the life of the flock. Eggs must be tested according to § 118.8.