| Nasik vibrio | An organism differing from the cholera vibrio, being shorter and stouter and less comma-shaped; its cultures are very toxic to laboratory animals on intravenous injections. (05 Mar 2000) |
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| El Tor vibrio | A bacterium regarded as a biovar of vibrio cholerae. It was originally isolated from six pilgrims who died of dysentery or gangrene of the colon at the Tor quarantine station on the Sinai Peninsula. (05 Mar 2000) |