Rickettsiology is a branch of microbiology that focuses on the study of rickettsia.

Rickettsialpox is a rare infectious disease caused by the bacterium Rickettsia akari.

He was diagnosed with rickettsemia.

The old wooden bridge was rickettier than I expected.

The old wooden bridge in the village is the rickettiest structure I have ever seen.

Rickettsiaes are a type of bacteria that can cause diseases in humans.

The patient was diagnosed with rickettsemias.

The rickettsiologist conducted extensive research on tick-borne diseases.

Rickettsiologists study the various species of Rickettsia bacteria.

The patient was diagnosed with rickettsiaemic fever.