Morula in RBC is seen in
Ehrlichia are small gram negative bacteria,obligate intracellular bacteria which have affinity towards bloodcells,In cytoplasm of infected phagocytic cells,they grow within phagosomes as mulberry like clusters called morula(meaning mulberry).they are tick borne. Ref: ananthnarayan an paniker's microbiology 10th edition
Babesia
Ehrlichia
Spirochete
Entamoeba
Bacteriology