![]() Petri dishes, glass or plastic (at least 15 × 90 mm).Storage space, free of dust and insects and adequate for protection of equipment and supplies.The microbial density of air in working area, measured in fallout pour plates taken during plating, should not exceed 15 colonies/plate during 15 min exposure. Work area, level table with ample surface in room that is clean, well-lighted (100 foot-candles at working surface) and well-ventilated, and reasonably free of dust and drafts.2.Guidelines for calculating and reporting plate counts have been changed to conform with the anticipated changes in the 16th edition of Standard Methods for the Examination of Dairy Products ( 2) and the International Dairy Federation (IDF) procedures ( 6). For procedural details of the standard plate count, see ref. The automated spiral plate count method for the examination of foods and cosmetics ( 5), outlined below, conforms to AOAC Official Methods of Analysis, sec. The suitable colony counting range ( 10) is 25-250. The conventional plate count method for examining frozen, chilled, precooked, or prepared foods, outlined below, conforms to AOAC Official Methods of Analysis, sec. Detailed procedures for determining the APC of foods have been developed by the Association of Official Analytical Chemists (AOAC) ( 3) and the American Public Health Association (APHA) ( 1). The aerobic plate count (APC) is intended to indicate the level of microorganism in a product. Peeler (ret)įor additional information, contact Guodong Zhang. ![]() Authors: Larry Maturin (ret.) and James T. ![]()
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