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Lyme Disease in Texas? Enhancing Prevention Through the Identification of Areas of Risk . Susan Swinson-Williams . GEOG 596A Capstone Proposal Penn State MGIS Program Advisor : Dr. Justine Blanford. Agenda. Overview What is Lyme disease? Lyme in Texas Objectives Methods
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GEOG 596A Capstone Proposal
Penn State MGIS Program
Advisor: Dr. Justine Blanford
What is Lyme disease?
Lyme in Texas
Other Potential Applications
Questions / Comments
Dr. Burgdorfer, seen here inoculating ticks. Credit: NIAID/RML
Erythema migrans rash (Source: Wikipedia).
Darkfield microscopy photomicrograph, magnified 400x, of bacteria Borrelia burgdorferi (CDC, 1993).
Ticks are quite small, no bigger than a pinhead in the larval and nymphal stage
Their size enables them to feed on hosts unnoticed
Three things necessary for Lyme transmission:
the Lyme bacteria,
the ticks that can transmit the bacteria,
the hosts that serve as a meal for the ticks
The enzootic cycle of Borrelia burgdorferi (Source: Radolph, Caimano, Stevenson, & Hu, 2012).
Confirmed Lyme disease cases by month of disease onset in the United States from 2001-2010 (Source: CDC, 2013a).
Respondents reporting Fair or Poor health as a function of time until diagnosis (Source: Johnson et al., 2014).
Respondents reporting Fair or Poor health compared to the general population and patients with other chronic illnesses (Source: Johnson et al., 2014).
Reported Cases 1990-2008
This 2012 ‘Risk Map’ doesn’t even show the entire USA nor correlate with numbers of Lyme disease cases reported by the CDC. We can do better than this, right? (Yale School of Public Health, 2012)
The CDC admits that approx. 90% of cases go unreported, so these figures are quite a bit lower than reality. (LDA, 2012)
Lyme continues to spread due to migratory animals, development, reforestation, and climate change.
Multiple tick species exist in the U.S., some of which have overlapping distributions.
Approximate distribution of three vector tick species in the U.S. (Source: Bakken et al., 2006).
Many animals serve as blood hosts for feeding ticks. (Source: Levy, 2013)
(Feria-Arroyo et al., 2014).
To improve awareness of the prevalence of Lyme disease in Texas
Risk mapping can address Lyme in other neglected regions both in the U.S. (Virginia, Georgia, Louisiana) and other nations (Canada, Mexico, Caribbean, Australia).
Similar techniques can address other vector-borne diseases, which are the focus of the World Health Organization’s 2014 theme.
Peer Review Presentation & Feedback
Make suggested revisions based on peer feedback
Abstract Submission: URISA’s 52nd Annual Conference
Abstract Submission: TX Natural Resources Information System 27th annual Texas GIS Forum
Institutional Review Board (IRB) Training
Abstract Submission: ESRI Health GIS
Compile & Analyze Survey Results
Launch Survey Statewide
Final Draft & Advisor Review
Fall Term 2
Fall Term 1
Create potential risk map based on habitat data
9/8 to 9/11/2014
Abstract Submission: Applied Geography Conference
Applied Geography Conference
10/15 to 10/17
TNRIS 27th annual Texas GIS Forum
10/20 to 10/24
URISA’s 7th Caribbean Conference
10/27 to 10/30
ESRI Health GIS
11/3 to 11/5
Very great appreciation to my advisor, Dr. Justine Blanford,
for her professional guidance, useful critiques, and patient assistance in keeping my project focused and on schedule.
Also, special thanks to:
Anna E. Berman
and the Texas Lyme Disease Association
“It’s tick season again!”