FN Archimer Export Format PT C TI An infection of Ruditapes decussatus (Bivalvia) by Rickettsia BT AF MIALHE, Eric CHAGOT, Dominique BOULO, Viviane COMPS, Michel RUANO, Francisco GRIZEL, Henri AS 1:;2:;3:;4:;5:;6:; FF 1:PDG-DOP-DCN-AGSAE-LGP;2:;3:PDG-DOP-DCM-BOME-LALR;4:PDG-DOP-DCM-PM-APOI;5:;6:PDG-DOP-DCM-SREU; SI USA MONTPELLIER PALAVAS LA REUNION SE PDG-DOP-DCN-AGSAE-LGP PDG-DOP-DCM-BOME-LALR PDG-DOP-DCM-PM-APOI PDG-DOP-DCM-SREU UR https://archimer.ifremer.fr/doc/1987/acte-3107.pdf LA English DT Proceedings paper DE ;Ruditapes philippinarum;Pathogens;Histopathology;Pathology AB The authors report the presence of a Rickettsia in Ruditapes decussatus from natural populations of the Algarve (Portugal). Light microscopic shows infections of varying importance in gill tissues. Some enclose small procaryotic colonies (cp) scattered in all lamellae; in others, the colonies are scarce and hypertrophic (100 mu m). These different pictures suggest an amplification process. Digestive diverticulae may also be infected, but to a lesser extent. The ultrastructural features of this intravacuolar (mvd: densified vacuolar membrane) procaryote (P) and its multiplication by scission without a complex developmental cycle allows its classification in the order Rickettsiales. PY 1987 CT Aquaculture 67 : 258-259 ID 3107 ER EF