Description of a hepatopancreatic rickettsia-like organism in the redclaw crayfish Cherax quadricarinatus

Abstract

U ettsia-like organisms were observed in the hepatopancreatic quadricarinatus was collected from a pond bank at a tubule epithel~um of 1 moribund Cherax quadncarinatus from farm in north Queensland during a n investigation of a farm in north Queensland. The tissue tropism of the organism is dlstlnct from the systemic rickettsla-like orqanlsm pre-(Edgerton et lgg5). The U v~ously descnbed from C. quadncar~natus. This paper br~efly crayfish was sacrificed and fixed immediately in describes the histopathology, cytopathology and baslc mor-Bouin's fixative (Drury & Wallington 1967). Dissected phology of the hepatopancreatic nckettsia-llke organism tissues were processed routinely for histology includ-