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

Her last name is Rickett.

My friend's last name is Ricketts.

Rickers is a common surname in some regions.

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

I ordered two rickeys at the bar.

Rickey is a refreshing cocktail made with lime juice and carbonated water.

The malnourished child had a ricketed appearance.

He ricketed the old chair back and forth.

He was diagnosed with rickettsemia.