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J Clin Microbiol. 1985 November; 22(5): 778-781

Comparison of API 20E, API rapid E, and API rapid NFT for identification of members of the family Vibrionaceae.

ABSTRACT

Sixty isolates, from nine species of the family Vibrionaceae, were tested by the API 20E, API Rapid E, and API Rapid NFT systems. Results were compared with those obtained with standard biochemicals. Included were 7 Aeromonas caviae isolates, 27 Aeromonas hydrophilia isolates, 10 Aeromonas sobria isolates, 3 Plesiomonas shigelloides isolates, 3 Vibrio alginolyticus isolates, 3 Vibrio cholerae isolates, 1 Vibrio fluvialis isolate, 5 Vibrio parahaemolyticus isolates, and 1 Vibrio vulnificus isolate. The API 20E correctly identified all the isolates within 24 h. The API Rapid E correctly identified only 77%, misidentified 8%, and failed to identify 2% of the isolates in 4 h. The remaining 13% of the isolates gave a low selectivity identification, with one of the choices being correct. The API Rapid NFT correctly identified 87%, misidentified 5%, gave a low selectivity identification for 8% of the isolates, and in some instances, required up to 48 h of incubation. The API 20E is a valid system for use in the identification of the more commonly occurring members of the family Vibrionaceae and the most accurate and efficient of the three systems tested.

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