Flavobacterium branchiophilum and F. succinicans associated with bacterial gill disease in rainbow trout Oncorhynchus mykiss (Walbaum) in water recirculation aquaculture systems.

摘要: Bacterial gill disease (BGD) is a common and occasionally devastating that affects numerous cultured fish species throughout the world (Starliper & Schill 2012). Outbreaks of BGD tend to occur when environmental conditions deteriorate, opportunistic pathogens can more readily cause overt (Bullock 1972; Schachte 1983). The putative causative agent, Flavobacterium branchiophilum, has been shown induce under laboratory (e.g. Lumsden et al. 1995; Ostland 1995); however, diagnosis in field generally carried out through light microscopy and/or observation clinical signs. Therefore, identity bacterial specie(s) present on gills BGD-affected culture settings most often based visual assessment alone. observed bacteria using are presumed be F. branchiophilum organism morphology (numerous long, thin rods; Fig. ​Fig.1.),1.), with this presumption supported by previous research Byrne 1997; Derksen, Ferguson 1998) various branchiophilum-specific diagnostic approaches have developed. latter include ELISA (MacPhee 1995), IFAT (Heo, Kasai Wakabayashi 1990), PCR (Toyama, Kita 1996). A comprehensive examination naturally infected fish, not desirable enhance our understanding inform further potential vaccine development). We therefore sought manipulation (as opposed pathogen challenge) identify involved typical outbreaks. Our findings presented short communication.