Abstract
A survey was made to determine the sanitary quality of wheat flour. Samples were collected and analyzed by the USDA Federal Grain Inspection Service under the quality check program for contract government purchases. The Association of Official Analytical Chemists' method for light filth in flour was used to extract fragments of insects, feathers and rodent hairs; insect heads, larvae, mites and psocids. Insect fragments were most frequently encountered: 83% of the samples contained insect fragments, with counts ranging from 0 to 721 and a mean of 12.52. Ranges of other counts were rodent hair fragments, 0 to 75; feather barbules, 0 to 3; insect heads, 0 to 2; mites, 0 to 2; insect larvae, 0 to 3; psocids 0 to 1.
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