Table 1.

Course of the patient presented herein with Rocky Mountain Spotted Fever and polyarthritis. Day 1 is the start of the illness. She was hospitalized on Day 4–7.

Time Course (days)
Feature	Days 1–3	Day 4	Day 5–7	Day 8–12	Day 13–23	Day 90
Fever	−	+	−	+	−	−
Rash	+	++	−	++	−	−
Headache	−	−	−	+	−	−
Arthritis	+	++	+	++	−	−
Leukocytosis		+	−
Abdominal pain	−	−	−	−	−	−
Doxycycline*			+	−	+	−
RMSF IgM			positive
RMSF IgG			negative			1:128

+ This manifestation was present − This manifestation was not present

^*She received doxycycline while hospitalized on Days 6–7 and then as an outpatient on Days 13–23.