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host factors associated with the detection of aeromonas salmonicida and yersinia ruckeri in ontario, canada government fish hatcheries.this paper presents an epidemiological investigation of ontario ministry of natural resources fish health laboratory data from 1981 to 1997, to determine whether fish species and age were associated with lot-level detection of aeromonas salmonicida and yersinia ruckeri in hatchery fish. in stepwise logistic regression, the species brook trout and back-cross (lake trout crossed with the hybrid "splake") were more likely to test a. salmonicida-positive compared to all other species reared in the h ...200111311951
factors associated with the incidence of bacterial gill disease in salmonid lots reared in ontario, canada government hatcheries.bacterial gill disease (bgd) (causative agent: flavobacterium branchiophilum) has been a persistent problem in early-rearing salmonids in the ontario ministry of natural resources (omnr) fish hatchery system. retrospective epidemiological investigations of bgd diagnoses and treatments in omnr fish hatcheries during the period 1991-2001 were conducted using university of guelph fish health laboratory and omnr central office data. all investigations were conducted at the lot-level, which is the ma ...200817945368
rearing unit-level factors associated with bacterial gill disease treatment in two ontario, canada government salmonid hatcheries.early-rearing salmonids in ontario ministry of natural resources (omnr) fish hatcheries have been consistently affected by bacterial gill disease (bgd) (causative agent: flavobacterium branchiophilum) for many years. separate retrospective epidemiological investigations of bgd treatments at two omnr fish hatcheries (hatcheries a and b) for the 1999 production year were conducted using on-site hatchery records. both investigations were carried out at the rearing unit-level, with early-rearing (<9 ...200919560833
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