Attempt to cultivate Rickettsiella phytoseiuli in Dermacentor reticulatus ticks: an electron microscopic study.

Rickettsiella phytoseiuli occurring in Phytoseiulus persimilis mites was cultivated in Dermacentor reticulatus ticks. Rickettsiella multiplied similarly as in mites exerting all six developmental stages: dense, intermediate, bacterial, giant, crystal-forming and small dark particles.