A Direct Microscopic Count Procedure for the Rapid Estimation of Bacterial Numbers on Green-Headless Shrimp1,2

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Abstract
A Direct Microscopic Count (DMC) procedure, utilizing the Gram-stain, was used to estimate bacterial numbers on 149 samples of green-headless (shell-on) shrimp. A correlation of 0.876 (significant at P < 0.01) existed between the log DMC and log agar plate counts done at 25 C for 2 days. Samples judged questionable or unacceptable organoleptically had DMC's of 108 or more.