1. Black legged Ticks
Lymes on the rise………

2. The Increase of Lymes in Minnesota
A local family physician inquiring about Lymes disease.
Physician noted an increase of patients experiencing ring shaped rashes, headaches, and fever chills which point to Lymes.
Rigid diagnosis was not made as conformation requires an diagnostic assay.
The physician expressed concern that the Minnesota Department of Natural Resources maybe inaccurate.
Duluth area people might need to be better informed before planning outdoor activities.

3. Lymes Disease
symptomology

4. Contracting Lymes Disease
The bite of an infected nymph or adult tick can only transmit Lyme disease after it attaches to the host for 36 – 48 hours
the generation time of B. Burgdorferi: ~ 12 hours
Spirochetes waiting in the mid-gut of the tick begin to multiply as the tick starts its blood meal then migrate to the salivary glands where they are discharged into the host with the tick's saliva.
It takes several hours before a large enough infectious dose of spirochetes can penetrate the new host.
Most incidences of Lyme disease occur from May through September because the nymphal stage of the tick is responsible for most cases
They are too small to be easily detectable
Their bites cause much milder pain than an adult tick.

5. Lymes Disease

6. Symptomology of Lymes Disease
Lyme is a multisystem inflammatory disease
affects the skin in the early stage
and then spreads to the joints, nervous system and may eventually affect the organ systems.
The symptoms are divided into three stages, each stage being more advanced than the previous.

7. Symptomology Stage 1 – Skin Rash Around Tick Bite (75%) Mild Illness
Early localized infection
Skin Rash Around Tick Bite (75%)
Mild Illness
Flu-like Symptoms
Fevers
Chills
Swollen Lymph Nodes
Headache
Stiff Neck
Muscle Fatigue
Initial sign and symptoms of Lyme disease include an appearance of a rash, which has the appearance of being solid red or bull’s eye rash with flu like symptoms. These symptoms may appear up to a month after infection.

8. Symptomology Stage 2 – Early Disseminated Infection
Within weeks of stage one symptoms, the bacterium may spread to other parts of the body through the bloodstream.
infected individuals may start having acute neurological problems such as Bell's Palsy. *15% of untreated patients progress to this stage.
Meningitis, as well as mild Encephalitis is common at this stage, leading to memory loss, sleep disturbances, or changes in mood or affect.
Symptomology
Stage 2
– Early Disseminated Infection
Neurological Problems
Meningitis
Encephalitis

9. Symptomology
Stage 3 –
Late Persistent Infection
Polyneuropathy
Pain and Numbness
Cognitive Impairment
Arthritis
Acrodermatitis chronica atrophicans (primarily in Europe)
The third and the most severe stage may occur months to years after initial infection. Symptoms at this stage are primarily rheumatologic and neurologic, and mostly untreatable.

10. Resources: http://www. nature

11. Long Term Lyme
3 stages of Lyme Disease

12. Stage 1: Early Localized (previous slides) Stage 2: Early Disseminated
Weeks to Months
Affects skin, joints, nervous system, heart
Stage 3: Late Persistent
Months to Years
Damage to joints, nerves, brain

13. Stage 3 Also Known as: Occurs 6 months after treatment
Post-Lyme Disease Syndrome
Chronic Lyme Disease
Occurs 6 months after treatment

14. Possible Cause
If antibiotics are not received quickly, then the body may build up antibodies to B. b. These antibodies may later attack healthy tissues.
Multiple studies hint at the autoimmune process behind Lyme Disease but nothing is known.

15. Diagnosis Clinical Evidence Enzyme Linked Immunosorbent Assay
Western Blotting
Indirect Immunofluorescence
Detect antibodies
Lack s sensitivity and specificity
PCR 

16. Treatment Short Term Treatment Chronic Antibiotics Amoxicillin
Probenecid
Ceftriaxone
Doxycycline
Tetracycline
Chronic Antibiotics
Penicillin
Erythromycin
Tetracyline

17. Our tick collection methods
Materials:
Light-colored bed sheet
Hand held GPS devices
Sealable plastic containers
Methods:
We began by stopping at the banks of pre-selected locations listed in the GPS.
We separated into groups of about two and while holding the sheet open, we swept the ground.
After dragging for 100 yards we examined the sheet in hopes of finding black-legged ticks.

18. Our Results
We continued collecting over two days for a total of eight stops.
We found six ticks.
Some observations were made about the general environment in which the ticks were found, however, very little information was recorded.
All of the ticks found were in their nymph stage and were not much larger than the point of a pencil.
Our sampling was done during the mid summer season rather than the late spring or fall, this may be why so few ticks were collected.

19. Tick collection criteria
Project title
Michael Cherry| Dr. Ben Clarke| Bridges and Pathways Program 2010

20. Tick Collection
What criteria and procedures should be used when collecting ticks in the ‘wild’?

21. Project Overview Where ticks are located
Survey techniques should be consistent
Use of standardized equipment
Integrity of Data Collection Criteria and methods of recording

22. Where are ticks located in the midwest?
Near or in deciduous forests
Dry to mesic (moderate moisture) forests
Alfisol-type soils of sandy or loam-sand textures overlying sedimentary rock
Along ecotones (boundaries between varying ecosystems)

23. Alfisol Soils
Alfisols are a soil order in USDA soil taxonomy. Alfisols form in semiarid to humid areas, typically under a hardwood forest cover. They have a clay-enriched subsoil and relatively high native fertility. "Alf" refers to Aluminium (Al) and Iron (Fe).
Alfisol from East Tennessee.

24. Where are ticks not located in the midwest?
Near coniferous forests
Grasslands
Wet and very damp forests
Acidic soils of low fertility and a clay soil texture
Precambrian bedrock

25. Construction of dragging equipment
70 x 90cm piece of light-colored corduroy
1cm diameter wooden dowel along leading edge
Steel rod sewn into trailing edge for added weight
Rope or wood handle to allow front edge of ‘sheet’ to contact vegetation

26. Collection Techniques from Schulze/jordan
Same individual should perform the dragging for consistency
Speed, height
Collected hourly from 0600 – 2100 hours
100m long transects, collect every 10m to prevent ticks from falling off
Ramdomize dragging order, direction of travel, location within each transect (left, right, center) to minimize repeated dragging of same areas
Minimize dew collection by drying on running pickup truck hood
To minimize effects of moisture on tick collection

27. Statistics
For each sampling event (each hour) (use of Weather Station):
Ambient Temperature
Ambient Humidity
Place Weather Station in center of area, 1m above vegetation height
Litter temperature and humidity (digital thermometer)
At least 2.5cm below leaf litter surface but not into the soil

28. Statistical analysis Use of repeated measures of analysis of variance
Use of multiple linear regression to examine relationships
Use separate regressions for each species
Tolerance value of 0.1 is acceptable
Calculate temp gradient: subtract hourly litter temp from ambient
Calculate humidity gradient: subtract litter H from ambient H
Use Pearson correlation and linear regression to determine relationships between calculated gradients and numbers of questing ticks

29. Conclusion
Consistency regarding the gathering of ticks and in measuring and recording statistics are critical to success

30. Works Cited
Meteorologically Mediated Diurnal Questing of Ixodes Scapularis and Amblyomma Americanum Nymphs – Terry Schulze and Robert Jordan Journal of Medical Entomology (2003)
Distribution of the Common Tick, Ixodes ricinus, in different vegetation types in Southern Sweden – Anders Lindstrom and Thomas Jaenson, Journal of Medical Entomology (2003)

31. Possible Outcomes
Lymes disease occurances have been on the rise in the US partially due to climate change and expansion in tick population, but also due to increased human/tick interaction in fringe areas near cities. By identifying specific ecotomes required for the complex life cycles of ticks and boriela, we can possibly eliminate some of those factors in these fringe areas possibly reducing the incidence of disease being transferred to humans

32. GIS Modeling of the Interrelationship of Ticks, Mice, and Ecotones
Collecting ticks while recording specific geographical data
Soil/vegetation/elevation/etc.
Analyze ticks to detect the presence of Borriela bacteria
Analyze the Data searching for patterns of Borriela in relation to the specific ecotone in which the tick was found

33. Investigating Lymes Disease Symptoms and Current Vaccines and Possible Future Ideas to Develop a New Vaccine.
By: Nina M. Holz

34. Borrelia burgdorferi
Complete genome

35. Characteristics Borrelia burgdorferi are
spiral shaped microorganism (spirochetes)
Gram-negative
Motile
On the average, seven periplasmic flagella are located at each cell end, and these flagella overlap at the central region of the cell.
inhabit the gut of deer ticks (Ixodes scapularis).
Named after American scientist Willy Burgdorfer who in 1982 isolated and determined the bacterium.
Lymes disease is the most common tick-borne disease in the US.

36. Characteristics Chemo-organotropic Microaerophilic Catalase negative
derive energy by metabolizing organic molecules.
Microaerophilic
they require oxygen to survive, but only at low concentrations. Too much or lack of oxygen can be harmful to them.
Catalase negative
they are unable to break down hydrogen peroxide.
They cannot synthesize their own amino acids, fatty acids, enzyme cofactors, and nucleotides.

37. Characteristics Optimal growth temperature is 34° to 37°C
Generation time of 11 to 12 hours at 35°C.
Their life cycle is directly linked to their host, and they depend on arthropod vectors (ticks) to infect mammals.
They reside in infected mammals as well as in the gut of ticks.
They multiply when there is enough blood ingested by the tick to support bacterial growth.

38. Genome structure DNA Molecule Summary Chromosomal Gene Summary
28.5% G+C chromosomal bases
63.1% linear DNA bases
853 genes
793 protein coding genes
502 genes assigned a role, 51 genes not assigned a role
102 hypothetical genes

39. Cultivation
The organism's small genome lacks the genes that are necessary for the synthesis of amino acids, fatty acids, enzyme cofactors, and nucleotides.
In order for these spirochetes to be cultured, a very special type of medium is used called Barbour-Stoenner-Kelly (BSK) medium.

40. BSK =Barbour-Stoenner-Kelly
Contains serum-supplemented mammalian tissue-culture that enables the bacterium to reproduce without ever having the need to synthesize too many biological compounds.
Contains over thirteen ingredients in a rabbit serum base.
Optimal temperature for growth =32-35oC
A microaerobic environment.
Even under optimal conditions, the generation time is slow, about hours.
BSK solidified with 1.3% agarose allows the production of colonies from single organisms.

41. Some Basic Background Information Regarding Ticks and Lymes Disease
The tick that passes enables animals to contract Lymes Disease is called: Ixodes scapularis.
The ticks generally feed on a wide variety of small mammals, birds, and reptiles, but prefer to feed on white-footed mice (Peromyscus leucopus), which are the important reservoir of infection in nature.
Adults prefer to feed and mate on white-tailed deer .
The infection is a bacteria called Borrelia burgdorferi. The ticks usually get infected from feeding on a infected host.
Not all humans that get bite by ticks get Lymes diesease
Only ticks that are infected with the bacteria can give Lymes to humans
This is generally after a prolonged amount of time feeding on the human where they can also get Lymes disease

42. Internal Anatomy of a Tick
Shown to the left is the internal anatomy of a tick. The picture shows the major areas involved in feeding and reproducing in the tick.

43. Early Onset Symptoms of Lymes Disease
Within 1-4 weeks of being bitten by an infected tick, most people will experience some symptoms of Lyme disease.
A circular, expanding rash (called erythema migrans) at the site of the bite develops in about 70%-80% of cases.
Some people report flu-like symptoms at this stage, including fever, chills, headaches, fatigue, swollen lymph nodes, joint pain, and muscle aches.” (WebMD)

44. Mid-Stage Onset Symptoms of Lymes Disease
If the disease is not detected and treated in its early stages, it can extend to more areas of the body, affecting the joints, heart, and nervous system (about 1-4 months after the initial bite).
Additional rashes may occur, and there may be intermittent periods of pain and weakness in the arms or legs.
Facial-muscle paralysis (Bell's palsy), headaches, and poor memory are other symptoms at this stage, along with a rapid heartbeat and some loss of control of facial muscles.” (WebMD)

45. Late-Stage Onset Symptoms of Lymes Disease
This is the most serious stage of the disease, when treatment was either not successful or never started (usually occurring many months after the initial bite).
Joint inflammation (arthritis), typically in the knees, becomes apparent, and may become chronic.
The nervous system can develop abnormal sensation because of disease of peripheral nerves (peripheral neuropathy), and confusion.
Heart problems are less common, but can include inflammation of the heart muscle.” (WebMD)

46. Current Treatments for Lymes Disease
Most Lyme disease is curable with antibiotics, particularly when the infection is diagnosed and treated early.
Doxycycline, amoxicillin, and cefuroxime are the drugs of choice most of the time for early illness.
Later stages might require longer-term, intravenous antibiotics, such as ceftriaxone.” (WebMD)

47. Vaccines made for Lymes Disease
Currently, there is no human vaccine for Lyme disease.
The one that did exist -- LYMErix -- is no longer available.
Originally approved by the FDA in 1998 to help prevent the disease, the vaccine was pulled from the market by the manufacturer in 2002 due to poor sales.
There was concern that the vaccine could trigger arthritis problems, although the FDA never found evidence that the vaccine was dangerous.” (WebMD)

48. Possible Ideas for a Future Vaccine for Lymes Disease
Since the Salp15 protein is the protein that enables the bacteria to enter the host initially undetected, learning more about the protein anatomy and morphology would be beneficial.
If there is some way to possibly degrade the protein so that the bacteria is exposed and becomes vulnerable, I think this would allow the host’s body to fight off the bacteria faster and more efficiently with hopefully less damage to the body.