4EGE V. A revision of the genus Anguilla Shaw: a systematic, phylogenetic and geographical study [ J ]. Dana Report, 1939, 16: 251-256.
5WARDLAW A C. Practical statistics for experimental biologists [ M]. Chichester: John Wiley and Sons, 1985.
6THURMV, GERICKE B. Identification of infant food as a vehicle in a nosocomial outbreak of Citrobacterfrettndii epidemio- logical subtyping by allozyme, whole-cell protein and antibiotic resistance [ J]. J Appl Bacteriol, 1994, 76: 553-558.
7ALLER S C, CHUSID M J. Citrobacter koseri pneumonia and meningitis in an infant [J]. J Infect, 2002, 45 : 65-68.
8] SANZ F. Rainbow trout mortalities associated with a mixed infection with Citrobacterfreundii and IPN virus [J]. Bulle- tin of the European Association of Fish pathologists, 1991, 11 : 222.