Roseovarius crassostreae, the etiological agent of Juvenile Oyster Disease (now to be known as Roseovarius Oyster Disease) in Crassostrea virginica

Use of the 16S-23S rDNA internal transcribed spacer of Roseovarius crassostreae for epizootiological studies of juvenile oyster disease (JOD)

“…Details regarding mortality, bacteriological analyses, and other features of selected epizootics have been reported previously (Boettcher et al 1999, Maloy & Boettcher 2003, Maloy et al 2007). Descriptions of certain populations sampled in 2004 and data regarding phenotype variation and genetic analyses are presented herein.…”

“…The bacterium is not part of the normal flora of healthy oysters and represents the only organism to be consistently and specifically associated with JOD. Mortality has been reproduced by laboratory challenge (Boettcher et al 2000), and JOD-like conchiolin has been induced by experimental exposure to R. crassostreae (Maloy et al 2007). Other evidence to support a primary role for R. crassostreae includes its consistent isolation from JOD epizootics throughout the northeastern USA and its presence in oysters immediately preceding the onset of gross JOD signs and mortality (Maloy et al 2007).…”

“…Mortality has been reproduced by laboratory challenge (Boettcher et al 2000), and JOD-like conchiolin has been induced by experimental exposure to R. crassostreae (Maloy et al 2007). Other evidence to support a primary role for R. crassostreae includes its consistent isolation from JOD epizootics throughout the northeastern USA and its presence in oysters immediately preceding the onset of gross JOD signs and mortality (Maloy et al 2007). The bacterium was formally recognized as the causative agent of JOD at a recent symposium that brought together the accumulated research on the disease (Boettcher et al 2006).…”

“…The bacterium was formally recognized as the causative agent of JOD at a recent symposium that brought together the accumulated research on the disease (Boettcher et al 2006). To avoid potential confusion with other diseases of juvenile oysters, we have proposed that JOD be renamed 'Roseovarius oyster disease' (ROD) (Maloy et al 2007).…”

Investigating the Driving Mechanisms Behind Differences in Bleaching and Disease Susceptibility Between Two Scleractinian Corals, Pseudodiploria Strigosa and Diploria Labyrinthiformis

“…A similar ribotype was also observed in black band disease (BBD) (Sekar et al 2006;. It is now known that Roseovarius crassostreae is the etiological agent of JOD (renamed Roseovarius Oyster Disease- Maloy et al 2007) and belongs to the Roseobacter clade (Boettcher et al 2005). These findings suggest that members of the Roseobacter clade may be directly involved in disease etiology.…”