Letter of Invitation

Letter of Invitation.pdf

Emergency Epidemic Investigation Data Collections - Expedited Reviews (Y3Q4)

Letter of Invitation

OMB: 0920-1011

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Capt. Danice K. Eaton, MPH, PHD
Lead, Fellowship and Response Support Team (FRST)
Centers for Disease Control and Prevention (CDC)
1600 Clifton Road, NE, MS E-92, Atlanta 30329-4027
July 6, 2018

Dear Capt. Eaton,
Rocky Mountain spotted fever (RMSF) continues to emerge as a significant health issue in the tribal
communities of Arizona with more than 380 cases, including 23 deaths reported from tribal residents
since 2003. During this same time, CDC, Indian Health Services (IHS), and the Arizona Department of
Health Services (ADHS) have been working together with tribes to understand the unique epidemiology,
transmission, ecology, and clinical risk factors associated with this devastating disease. We know that
RMSF is a rapidly progressing disease spread by the brown dog tick in Arizona. RMSF occurs in epidemic
levels in some tribal communities with disease rates driven by heavy peri-domestic tick infestations and
large populations of free roaming dogs. More than half of RMSF cases and deaths have occurred in
children less than 10 years of age. Beyond the sheer number of fatalities, large portion of Arizona cases,
require hospitalization, many spending time in the intensive care unit. However, we do not have a good
understanding of the long-term impact the disease once they leave the hospital. Small studies have
suggested that long-term sequela may result from severe RMSF infection and can include outcomes like
blindness, hearing loss; paralysis; or mental disability; but we do not know how frequently this may
occur, and if patients are likely to improve over time.
CDC, IHS, ADHS, and tribal communities are working to build sustainable RMSF prevention programs and
have undertaken massive efforts to improve clinical education programs to ensure healthcare providers
in the region can recognize the signs and symptoms of RMSF and quickly initiate effective antibiotic
therapy. Despite these efforts, cases, including critical and fatal cases, continue to occur. Due to the
significant impact RMSF continues to have on our community, there is an urgent need to identify the
Douglas A. Ducey | Governor

Cara M. Christ, MD, MS | Director

150 North 18th Avenue, Suite 500, Phoenix, AZ 85007-3247
P | 602-542-1025
Health and Wellness for all Arizonans

F | 602-542-1062

W | azhealth.gov

long-term health impact of RMSF. ADHS would like to ask for CDC’s help in identifying the undetermined
risk factors for long-term sequelae resulting from Rocky Mountain spotted fever. Objectives of this
investigation will be to:
1. Identify cases of RMSF hospitalized for their illness between 2003-2017 who might have persistent health impacts.
2. Identify and describe impairments to cognitive, behavioral, motor, and developmental function following RMSF illness
using patient interviews, neurologic assessments, and developmental skills assessments for children < 5 years.
3. Use statistical methods to characterize risk factors associated with such long term neurological sequelae.

Results of this investigation will help healthcare providers to make informed decisions on the long-term
management and specialized follow-up care to optimize functional status and recovery of RMSF
survivors. This information will also enable effective counselling of patients and families on likely
outcomes of RMSF illness and the expected length of time to recovery.

Ken Komatsu, MPH
State Epidemiologist,
Chief, Office Infectious Disease Services
Arizona Department of Health Services

Douglas A. Ducey | Governor

Cara M. Christ, MD, MS | Director

150 North 18th Avenue, Suite 500, Phoenix, AZ 85007-3247
P | 602-542-1025
Health and Wellness for all Arizonans

F | 602-542-1062

W | azhealth.gov


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