Story highlights Jo Rogers contracted Rocky Mountain Spotted Fever

Cases as bad as hers are rare, but infections are not so rare

(CNN) A tick bite led to amputations on all four of an Oklahoma woman's limbs. Doctors did it to save Jo Rogers' life from the aggressive bacteria the arachnid passed on.

It's the worst case of Rocky Mountain Spotted Fever they'd seen, Roger's cousin Lisa Morgan told CNN affiliate KOCO.

Rogers fought for her life on a ventilator in a medically induced coma. Her family is now focusing her attention on getting through this.

"You're going to get to watch your boys grow up," her cousin Lisa Morgan tells her. Rogers, 40, has two sons, ages 12 and 17.

The intensity of Rogers' case may be rare, but infections unfortunately are not.

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