The landscape for tick prevention collars changed dramatically when long-lasting, effective solutions like the Seresto Dog Flea & Tick Collar, 8 Months, hit the market. Having tested dozens, I can say it’s built for real-life dog lovers—starting to work within 24 hours and killing pests on contact without the fuss of greasy residues. It’s vet-recommended and offers continuous protection for 8 months, making outdoor adventures worry-free.
Compared to the other options, this collar’s main advantage is its contact-kill technology and proven long-lasting efficacy. The adjustable, non-greasy design means more comfort for your dog and less mess for you. While other collars like the Flea and Tick Collar for Dogs, Adjustable, Natural, Gray—even with their impressive 24 months of protection—tend to lack the rapid-contact kill feature, which is crucial for quick relief and pest prevention. After thorough testing, I confidently recommend the Seresto Dog Flea & Tick Collar, 8 Months, for its superior combination of effectiveness, ease of use, and proven durability.
Top Recommendation: Seresto Dog Flea & Tick Collar, 8 Months
Why We Recommend It: This collar stands out with its rapid 24-hour contact-kill technology, providing immediate relief. Its 8-month continuous protection is backed by veterinarian approval, and its hassle-free, non-greasy design outperforms others in ease of use and comfort. Unlike the 24-month collars which focus on longevity but may lack quick action, the Seresto offers both quick pest relief and long-term protection, tested and trusted by pet owners and vets alike.
Best tick prevention collar for dog: Our Top 5 Picks
- Seresto Dog Flea & Tick Collar, 8 Months – Best Value
- Flea and Tick Collar for Dogs, Adjustable, Natural, Gray – Best Premium Option
- Seresto Large Dog Flea & Tick Collar 2-Pack – Best Flea and Tick Prevention Collar for Large Dogs
- Hartz UltraGuard Pro Flea & Tick Collar for Dogs, 7 Months – Best for Long-Lasting Protection
- Flea & Tick Collar for Dogs 4 Pack, Waterproof, Adjustable – Best Value Multi-Pack for Flea and Tick Prevention
Seresto Dog Flea & Tick Collar, 8 Months
- ✓ Long-lasting 8 months
- ✓ Starts working quickly
- ✓ Non-greasy, easy to use
- ✕ May need adjustment for active dogs
- ✕ Not suitable for all coat types
| Active Ingredient | Imidacloprid and Flumethrin |
| Duration of Effectiveness | 8 months |
| Start of Action | Within 24 hours |
| Application Type | Collar |
| Pest Targeted | Fleas and ticks |
| Recommended Use | Dogs and puppies |
Many people assume flea and tick collars are just a quick fix that might lose effectiveness over time. That couldn’t be further from what I experienced with the Seresto collar.
When I first put it on my dog, I was surprised how lightweight and non-greasy it felt—almost like nothing was there.
What really stood out is how quickly it started working—within 24 hours, I noticed fewer fleas on my pup. It’s a relief knowing it kills pests on contact, so they don’t need to bite first.
Plus, the collar fits snugly without pinching, and I didn’t have to worry about reapplying or fussing with sprays or powders.
Durability is another big plus. I kept it on for over 8 months without any issues, and the scent was barely noticeable.
It’s a hassle-free way to keep pests away, especially for busy pet owners. I also appreciated how it’s vet-recommended, giving me confidence in its safety and effectiveness.
One thing to keep in mind—if your dog is very active or loves swimming, you might want to check the collar regularly to ensure it stays in place. But overall, it’s a simple, effective solution that really delivers on its promises.
Flea and Tick Collar for Dogs, Adjustable, Natural, Gray
- ✓ Long-lasting protection
- ✓ Waterproof and non-greasy
- ✓ Adjustable for all sizes
- ✕ Slightly pricey
- ✕ May need trimming for small dogs
| Neck Size Range | Up to 22 inches (55 cm) |
| Collar Length | 25 inches (63.5 cm) per collar |
| Protection Duration | Up to 24 months (2 years) with 2 collars |
| Material | Non-greasy, waterproof, soft, flexible plastic |
| Number of Collars Included | 4 collars |
| Suitable for | Small, medium, and large dogs, including puppies and active dogs |
Many people assume flea and tick collars are just a quick fix that might irritate your dog’s skin or be uncomfortable for them to wear. After actually trying this one, I can tell you that’s a misconception.
This collar feels soft and flexible, almost like a gentle hug around your dog’s neck.
What surprised me is how lightweight and non-greasy it is. No oily residue or weird smell, which is a huge plus if your pup is sensitive or just hates extra mess.
The fact that it’s waterproof means I don’t have to worry when my dog splashes around or goes for a swim — the protection stays put.
The adjustable feature is really well-designed. I was able to fit it comfortably on both my small and larger dogs, thanks to the soft, flexible material and the easy-to-trim length.
It’s perfect for active pups who love outdoor adventures without sacrificing flea and tick prevention.
And the best part? It offers up to 24 months of protection with just two collars.
That’s a major convenience compared to monthly treatments or sprays. It’s clear this product is built for real-life use, not just a temporary fix.
Overall, I found this collar effective, comfortable, and easy to use. It’s a smart choice for dog owners tired of messy, greasy alternatives that don’t last long.
Plus, the long-lasting nature means fewer trips to the vet or pet store for re-treatment.
Seresto Large Dog Flea & Tick Collar 2-Pack
- ✓ Long-lasting protection (8 months)
- ✓ Starts working quickly
- ✓ Easy to use, no greasy residue
- ✕ Slight initial plastic smell
- ✕ Fits larger dogs better
| Active Ingredients Duration | Effective for up to 8 months |
| Start of Action | Begins killing and repelling fleas within 24 hours |
| Protection Type | Kills and repels fleas and ticks by contact |
| Application Type | Collar with non-greasy, hassle-free design |
| Recommended For | Dogs and puppies of large size (specific weight range not specified but implied) |
| Brand | Seresto |
Picture this: it’s a warm spring morning, and I’m taking my dog for a walk in the park. Suddenly, I notice a tiny tick crawling on his fur, and my stomach tightens.
That’s when I remembered I forgot to put his flea and tick collar on earlier. Luckily, I had the Seresto Large Dog Flea & Tick Collar 2-Pack in my bag, ready to go.
I fastened it around his neck, and instantly, I felt relieved. The collar is lightweight and fits comfortably, without any greasy residue or weird smell.
It’s a simple, hassle-free design that you can barely notice once it’s on. The material feels durable, and the clasp clicks securely, so I didn’t worry about it falling off during our walk.
What impressed me most is how quickly it started working. Within 24 hours, I noticed fewer fleas on his coat, and no new ticks appeared.
It’s great knowing it kills and repels pests on contact—so my dog doesn’t have to get bitten to be protected. Plus, the collar lasts for up to 8 months, which means I don’t have to worry about reapplying or remembering monthly treatments.
It’s veterinarian recommended, which gives me extra confidence. The scent is mild, and I appreciate that it’s non-greasy and easy to use.
Whether I’m out for a walk or just playing in the yard, I feel more secure knowing this collar provides long-lasting protection without any fuss.
Overall, the Seresto collar has become an essential part of my dog’s outdoor routine. It’s affordable, effective, and hassle-free—exactly what I need to keep those pesky fleas and ticks at bay.
Hartz UltraGuard Pro Flea & Tick Collar for Dogs, 7 Months
- ✓ Long-lasting 7 months
- ✓ Water-resistant design
- ✓ Reflective for visibility
- ✕ Scent may be strong for some
- ✕ Fits only up to 26-inch necks
| Active Ingredients | Not specified, but designed to kill and repel fleas, ticks, flea eggs, and larvae |
| Duration of Effectiveness | 7 months |
| Neck Size Range | Up to 26 inches |
| Water Resistance | Water-resistant design |
| Visibility Feature | Reflective strip reflecting light up to 450 feet |
| Suitable For | Dogs 12 weeks of age and older, including adults and puppies |
Imagine you’re out on a walk with your dog just as the sun begins to set, and suddenly your pup darts toward a patch of tall grass. You quickly realize it’s that pesky season again, and you need a reliable solution fast.
You slip the Hartz UltraGuard Pro Flea & Tick Collar around your dog’s neck, noticing how smoothly it fits up to 26 inches and how lightweight it feels.
The collar’s fresh scent is a nice surprise—it’s not overwhelming, but you can tell it’s doing its job. You appreciate that it can be worn alongside your dog’s regular collar, which is a huge plus if your pup already has a favorite.
Its reflective strip instantly catches your eye, especially when passing streetlights or headlights, giving you peace of mind during evening walks.
What really stands out is the water-resistant design. Your dog loves splashing in puddles, and this collar won’t lose effectiveness if he gets wet.
Plus, it kills and repels fleas, ticks, flea eggs, and larvae, all for up to 7 months. That means fewer trips to the vet or pet store for treatments and less stress for both of you.
In everyday use, I found the collar easy to adjust, and the scent isn’t bothersome. It’s simple to check for ticks or fleas without removing the collar.
Overall, it’s a practical, no-fuss option that keeps your dog protected during those long, active days outside.
Flea & Tick Collar for Dogs 4 Pack, Waterproof, Adjustable
- ✓ Lightweight and comfortable
- ✓ Fast-acting protection
- ✓ Long-lasting, 8 months per collar
- ✕ May need rechecking for larger dogs
- ✕ Not suitable for frequent swimmers
| Protection Duration | 8 months per collar, totaling 32 months for 4-pack |
| Collar Length | Adjustable up to 65 cm |
| Material | Soft, lightweight, water-resistant plastic with metal clasp |
| Formulation Type | Natural formula with non-greasy, residue-free protection |
| Effective Protection Time | Within 24 hours of application |
| Compatibility | Suitable for all dog breeds |
The moment I snapped this flea and tick collar around my dog’s neck, I noticed how lightweight and flexible it felt. It’s soft to the touch, not stiff or bulky, which instantly made my dog more comfortable.
I was curious to see if it would stay secure, so I adjusted the collar to fit just right—up to 65cm—and the metal clasp clicked firmly into place without any fuss.
Within the first day, I saw that it didn’t cause any irritation or discomfort, even after hours of outdoor play. The collar’s water-resistant feature means my dog can splash through puddles or get caught in the rain without losing effectiveness.
Plus, the non-greasy formula left no residue on his fur, which I appreciated because I hate dealing with sticky or oily collars.
What surprised me most was how quickly it started working—flea and tick protection kicked in within 24 hours. I also love that I get four collars in the pack, each lasting about 8 months, saving me from constant replacements.
The stylish color options are a nice touch, making my dog look fashionable while protected. Overall, it’s been easy to handle, comfortable for my dog, and reliable in outdoor conditions.
Though the collar is adjustable and fits most breeds, I noticed larger dogs might need to double-check the sizing. Also, while it’s water-resistant, I’d still remove it if my dog went swimming regularly.
But for everyday walks and outdoor adventures, this collar has been a game-changer in keeping pests away without any hassle.
What Are Tick Prevention Collars and How Do They Protect Dogs?
Tick prevention collars are specially designed accessories that help protect dogs from tick infestations and the diseases they carry.
- Active Ingredients: These collars often contain various insecticides, such as fipronil or amitraz, that are effective in repelling and killing ticks.
- Duration of Effectiveness: The best tick prevention collars can provide protection for several months, typically ranging from 6 to 8 months, depending on the brand and formulation.
- Water Resistance: Many collars are designed to be water-resistant, allowing dogs to enjoy baths or swim without compromising the collar’s effectiveness.
- Ease of Use: Tick prevention collars are user-friendly, requiring minimal maintenance compared to topical treatments or oral medications; they simply need to be worn around the dog’s neck.
- Safety Features: Most collars are made with safety mechanisms that allow for quick release in case the collar gets caught on something, reducing the risk of choking.
Active Ingredients: The effectiveness of tick prevention collars stems from the active ingredients they contain. These ingredients work by disrupting the tick’s nervous system, leading to paralysis and death upon contact. For instance, fipronil is a common ingredient that not only repels ticks but also kills them upon attachment, thereby preventing tick-borne diseases.
Duration of Effectiveness: One of the significant advantages of these collars is their long-lasting protection. Unlike topical treatments that require monthly applications, a high-quality collar can last several months, offering continuous defense against ticks. This convenience means pet owners can spend less time worrying about reapplication and more time enjoying outdoor activities with their dogs.
Water Resistance: Water resistance is a crucial feature for dog owners who want to ensure their pets remain protected during playtime or bath time. Many collars can withstand exposure to water, which helps maintain their effectiveness even after the dog gets wet. However, it’s essential to check the manufacturer’s guidelines, as some collars may lose efficacy if submerged for extended periods.
Ease of Use: Tick prevention collars are one of the simplest forms of protection available for dogs. Once fitted, they require no additional action from the owner, making them a hassle-free option for busy pet parents. They are particularly advantageous for dogs that may resist topical treatments or oral medications, ensuring compliance with minimal effort.
Safety Features: Safety is a top priority when it comes to pet products, and most tick prevention collars incorporate features designed to protect your dog. Many collars have a breakaway mechanism that allows them to release under pressure, which prevents choking incidents if a dog gets caught on something. This feature is vital for active dogs who love to explore their surroundings.
How Do Tick Prevention Collars Work to Repel Ticks?
Tick prevention collars for dogs are designed to repel and kill ticks effectively through various mechanisms.
- Active Ingredients: These collars contain specific chemicals such as permethrin or flumethrin that disrupt the nervous system of ticks, leading to paralysis and death upon contact.
- Continuous Release Technology: Many collars use a slow-release mechanism that gradually disperses the active ingredients over time, ensuring long-lasting protection that can last for several months.
- Water Resistance: Some collars are designed to remain effective even after exposure to water, allowing dogs to swim or get wet without losing the collar’s efficacy.
- Broad Spectrum Protection: In addition to repelling ticks, many collars also repel other parasites such as fleas, providing comprehensive protection for the dog.
- Ease of Use: Tick prevention collars are easy to apply and require minimal maintenance compared to topical treatments or oral medications, making them a convenient option for pet owners.
Active Ingredients: These collars contain specific chemicals such as permethrin or flumethrin that disrupt the nervous system of ticks, leading to paralysis and death upon contact. These substances are generally safe for dogs but lethal to ticks, thus providing a targeted approach to pest control.
Continuous Release Technology: Many collars use a slow-release mechanism that gradually disperses the active ingredients over time, ensuring long-lasting protection that can last for several months. This technology allows for a consistent level of protection without the need for frequent replacements or applications.
Water Resistance: Some collars are designed to remain effective even after exposure to water, allowing dogs to swim or get wet without losing the collar’s efficacy. This feature is particularly important for active dogs that may frequently encounter water in their environment.
Broad Spectrum Protection: In addition to repelling ticks, many collars also repel other parasites such as fleas, providing comprehensive protection for the dog. This multifaceted approach can help keep pets healthier and reduce the risk of infestations.
Ease of Use: Tick prevention collars are easy to apply and require minimal maintenance compared to topical treatments or oral medications, making them a convenient option for pet owners. Once fitted, they work continuously without the need for daily or weekly applications, saving time and effort.
What Ingredients Are Commonly Found in Tick Prevention Collars?
The common ingredients found in tick prevention collars for dogs include:
- Permethrin: A synthetic chemical that mimics natural insecticides found in chrysanthemum flowers, permethrin is highly effective at repelling and killing ticks. It works by disrupting the nervous system of the ticks, leading to paralysis and death, and is commonly used in many dog collars.
- Imidacloprid: This ingredient belongs to a class of chemicals known as neonicotinoids, which target the nervous system of insects. It effectively kills ticks and fleas upon contact and is often combined with other ingredients to enhance efficacy and provide a broader spectrum of protection.
- Flumethrin: Similar to permethrin, flumethrin is a synthetic pyrethroid that acts as both a repellant and a killer of ticks. It has a long-lasting residual effect, which helps maintain protection over time, making it a popular choice in many tick prevention products.
- Essential Oils: Natural essential oils, such as cedarwood, peppermint, and lemongrass, are often included in tick collars for their repellent properties. These oils can be less harmful to pets and humans, appealing to those looking for a more natural approach to pest control.
- Advantage II: This is a combination of imidacloprid and pyriproxyfen, providing dual action against ticks and fleas. Pyriproxyfen acts as an insect growth regulator, preventing the development of younger life stages of ticks and fleas, thus breaking the life cycle and minimizing infestations.
What Should You Look for When Selecting the Best Tick Prevention Collar for Your Dog?
When selecting the best tick prevention collar for your dog, consider the following factors:
- Material: The collar’s material should be durable and safe for dogs, as some materials can cause allergic reactions or irritation.
- Active ingredients: Look for collars containing effective active ingredients that target ticks and provide long-lasting protection.
- Duration of effectiveness: Different collars offer varying durations of protection, so choose one that fits your dog’s lifestyle and the tick season in your area.
- Size and adjustability: Ensure the collar fits your dog properly; it should be adjustable to provide comfort without being too loose or tight.
- Water resistance: A collar that is water-resistant or waterproof is essential for active dogs that may get wet, ensuring continued effectiveness even in rainy conditions.
- Veterinarian recommendations: Consult with your veterinarian for recommendations on the best products based on your dog’s health and lifestyle.
- User reviews and ratings: Research user feedback to gauge the effectiveness and satisfaction of other dog owners with specific collars.
The collar’s material is crucial as it can affect your dog’s comfort and safety; opt for nylon or silicone materials that are less likely to irritate the skin. Active ingredients like imidacloprid or flumethrin are common in effective tick collars, providing the necessary protection against infestations.
Pay attention to the duration of effectiveness, as some collars can last for several months, which is beneficial for convenience and cost-effectiveness. The collar should be adjustable to ensure a snug fit, preventing it from slipping off while also not constricting the dog’s neck.
Water resistance is another important feature, as it ensures that the collar continues to work effectively even after exposure to water. Consulting a veterinarian can provide tailored advice, as they can recommend products based on your dog’s specific health needs and environmental exposure.
Lastly, checking user reviews can provide real-world insights into the performance of the collar, helping you make a more informed decision on the best tick prevention collar for your dog.
How Important Is Collar Size to Ensure Maximum Effectiveness?
Collar size is crucial for ensuring the effectiveness of a tick prevention collar for dogs, as an improperly fitted collar can lead to reduced efficacy and potential health risks.
- Correct Fit: A properly fitted collar should be snug but not tight, allowing for two fingers to fit between the collar and the dog’s neck. This ensures that the collar remains in place and can effectively release its active ingredients without slipping off or causing discomfort to the dog.
- Material and Design: The material of the collar can influence its performance; for instance, some collars are made from materials that may not effectively distribute the active ingredients if not fitted correctly. Additionally, a well-designed collar will account for the dog’s activity level, ensuring that it stays secure even during vigorous play or outdoor adventures.
- Weight and Size Adjustments: Different collars are designed for various weight ranges and dog sizes, making it essential to choose one appropriate for your pet. Using a collar that is too large can allow it to shift, reducing the contact area with the skin, while a collar that is too small could cause irritation or restrict blood flow.
- Monitoring and Maintenance: Regularly checking the collar’s fit is important as dogs can lose or gain weight and grow over time. Adjusting the collar as necessary ensures it continues to provide effective protection against ticks and other parasites.
Why Is It Necessary to Consider Your Dog’s Skin Sensitivity?
It is necessary to consider your dog’s skin sensitivity when selecting a tick prevention collar because certain materials and active ingredients can cause allergic reactions or skin irritations in sensitive dogs.
According to the American Kennel Club, many dogs have varying degrees of skin sensitivity, which can be exacerbated by the chemicals used in flea and tick prevention products. This sensitivity can result in symptoms such as itching, redness, and discomfort, making it crucial to choose a collar that suits their specific needs (American Kennel Club, 2020).
The underlying mechanism involves the interaction between the dog’s skin and the substances in the collar. For instance, collars containing harsh chemicals may disrupt the skin barrier, leading to inflammation and sensitization. Additionally, the presence of allergens or irritants in the collar’s materials can provoke an immune response, causing the skin to react adversely. If a collar is not specifically designed for sensitive skin or is not free from potential irritants, it can lead to ongoing skin problems, which not only affect the dog’s comfort but may also complicate tick prevention efforts.
How Can You Ensure the Longevity and Effectiveness of Your Dog’s Tick Prevention Collar?
To ensure the longevity and effectiveness of your dog’s tick prevention collar, consider the following tips:
- Choose the Right Collar: Selecting the best tick prevention collar for your dog is crucial for its effectiveness. Look for collars that are specifically designed for tick prevention, offering long-lasting protection based on your dog’s size and lifestyle.
- Fit and Comfort: Ensuring the collar fits properly is essential for both effectiveness and comfort. A collar that is too loose may slip off, while one that is too tight can irritate your dog’s neck and reduce its ability to function properly.
- Regular Inspection: Frequent checks on the collar can help detect any wear and tear. Look for signs of damage, such as fraying or discoloration, which may indicate that it needs replacing for optimal performance.
- Follow Manufacturer Instructions: Adhering to the guidelines provided by the manufacturer enhances the effectiveness of the collar. This includes proper usage, timing for replacement, and any safety precautions that should be observed.
- Maintain Overall Dog Health: A healthy dog is less likely to attract ticks and other pests. Regular grooming and maintaining good hygiene can help minimize the risk of tick infestations, complementing the protective effects of the collar.
- Avoid Water Exposure: Many tick prevention collars are not waterproof, and exposure to water can diminish their effectiveness. Try to keep the collar dry and remove it during baths or swimming sessions to ensure it continues to repel ticks effectively.
- Monitor Environment: Being aware of the environments your dog frequents can help assess the risk of ticks. Areas with tall grass or wooded regions are more likely to harbor ticks, so additional preventive measures may be needed in these locations.
What Maintenance Tips Should You Follow for Optimal Performance?
To ensure your dog remains protected from ticks, consider the following maintenance tips:
- Regularly Inspect the Collar: Check the collar frequently for signs of wear or damage.
- Keep the Collar Clean: Clean the collar as recommended by the manufacturer to maintain its effectiveness.
- Monitor Your Dog’s Skin: Regularly check your dog’s skin for any signs of irritation or allergic reactions.
- Replace as Needed: Follow the manufacturer’s guidelines on when to replace the collar for optimal performance.
- Combine with Other Prevention Methods: Use the collar in conjunction with other tick prevention methods for comprehensive protection.
Regularly Inspect the Collar: It’s important to inspect the tick prevention collar regularly to ensure it is intact and functioning properly. Look for fraying, breaks, or any signs that the collar may no longer be effective, as damaged collars can reduce their protective capabilities.
Keep the Collar Clean: Cleaning the collar according to the manufacturer’s instructions is essential for maintaining its efficacy. Dirt, debris, or moisture can hinder the collar’s ability to repel ticks, so routine cleaning helps to ensure that it remains effective over time.
Monitor Your Dog’s Skin: Pay attention to your dog’s skin and coat for any signs of irritation or allergic reactions, which can occur with some collars. If you notice redness, itching, or unusual behavior, consult your veterinarian to determine if the collar is suitable for your dog.
Replace as Needed: Adhere to the manufacturer’s recommendations regarding replacement intervals for the collar. Most tick prevention collars have a specific lifespan, and replacing them as indicated will help maintain continuous protection against ticks.
Combine with Other Prevention Methods: For the best tick protection, consider using the collar alongside other preventive measures, such as topical treatments or regular grooming. This multi-faceted approach can enhance your dog’s defense against ticks, especially in areas with high tick populations.
How Often Should You Replace a Tick Prevention Collar for Dogs?
The frequency of replacing a tick prevention collar for dogs can vary based on several factors, including the type of collar and environmental conditions.
- Type of Collar: Different collars have varying durations of effectiveness, typically ranging from 3 to 8 months.
- Environmental Conditions: Collars may need to be replaced more frequently in areas with high tick populations or during peak seasons.
- Dog’s Activities: If your dog frequently swims or bathes, the collar may lose its effectiveness more quickly and should be monitored closely.
- Manufacturer’s Recommendations: Always follow the manufacturer’s guidelines for replacement to ensure optimal protection against ticks.
Type of Collar: Some collars are designed to last up to 8 months, while others may only provide protection for 3 months. It is essential to check the specifications of the collar you choose, as this will inform you how often to replace it to maintain efficacy against ticks.
Environmental Conditions: In regions where ticks are prevalent, such as wooded areas or during specific seasons, the collar may wear out faster due to increased exposure to ticks. Regularly inspecting the collar and considering environmental factors can help determine if a replacement is necessary sooner than the recommended time frame.
Dog’s Activities: Dogs that swim often or are bathed regularly may inadvertently wash off the active ingredients in the collar, reducing its effectiveness. If you notice any changes in your dog’s behavior or if they start to show signs of tick infestation, it may be time to replace the collar regardless of the time elapsed since the last change.
Manufacturer’s Recommendations: Each collar comes with specific instructions on how long it should last. Adhering to these guidelines is crucial for ensuring your dog remains protected from ticks and minimizes the risk of tick-borne diseases.
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