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Ticks Are Arthropod Parasites for Mammals

1/18/2020

41 Comments

 
Post by:
Becky Lundgren, DVM
​

Ticks are skin parasites that feed on the blood of their hosts. Ticks like motion, warm temperatures from body heat, and the carbon dioxide exhaled by mammals, which is why they are attracted to such hosts as dogs, cats, rodents, rabbits, cattle, small mammals, etc. The bite itself is not usually painful, but the parasite can transmit diseases and cause tick paralysis, which is why tick control is so important. (Removing the ticks leads to rapid improvement of the paralysis.)
Female ticks can lay up to 6,000 eggs at a time.
This female Ixodes scapularis tick was in the process of laying her clutch of eggs. Photo by CDC.
The minimal amount of time it takes for an attached tick to transmit disease is not known. The time it takes to transmit diseases is affected by the type of disease organism, the species of tick, etc. However, in general, if a tick is removed within 16 hours, the risk of disease transmission is considered to be very low. Therefore, owners can usually prevent disease transmission to their pets by following a regular schedule to look for and remove ticks.

"Some species of ticks lay 100 eggs at a time, others lay 3,000 to 6,000 per batch."

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Throughout the autumn, male and female adults find a host, which is again usually a rodent, pet, or human. The adult female feeds for 8 to 12 days. The female mates while still attached to her host. Both ticks fall off, and the males die. The female remains inactive through the winter and in the spring lays her eggs in a secluded place. If adults cannot find a host animal in the fall, they can survive in leaf litter until the spring.
What are the best ways to deal with these blood-sucking parasites?
​Tick Life Cycle
Most types of ticks require three hosts during a two-year lifespan. Each tick stage requires a blood meal before it can reach the next stage. Hard ticks have four life stages: egg, larva, nymph, and adult. Larvae and nymphs must feed before they detach and molt. Adult female ticks can engorge, increasing their weight by more than 100 fold. After detaching, an adult female tick can lay approximately 3,000 eggs.
​
During the egg-laying stage, ticks lay eggs in secluded areas with dense vegetation. The eggs hatch within two weeks. Some species of ticks lay 100 eggs at a time, others lay 3,000 to 6,000 per batch. Once the eggs hatch, the ticks are in the larval stage, during which time the larvae move into grass and search for their first blood meal. At this stage, they will attach themselves for several days to their first host, usually a bird or rodent, and then fall onto the ground. The nymph stage begins after the first blood meal is completed. Nymphs remain inactive during winter and start moving again in spring. Nymphs find a host, usually a rodent, pet, or human. Nymphs are generally about the size of a freckle. After this blood meal, ticks fall off the host and move into the adult stage. 

"Nymphs remain inactive during winter and start moving again in spring."

​Outdoor Environmental Control
Treating the yard and outdoor kennel area with acaricides (tick pesticides) is an important tool in the arsenal against ticks. There are products that can be used to spray the outdoor area. However, you should not rely on spraying to reduce your risk of infection. If you have health concerns about applying acaricides, check with local health or agricultural officials about the best time to apply acaricides in your area, identify rules and regulations related to pesticide application on residential properties, and consider using a professional pesticide company to apply pesticides at your home.
You can also create a tick-safe zone in your yard by using some simple landscaping techniques that can help reduce tick populations:
  • Remove leaf litter.
  • Clear tall grasses and brush around homes and at the edge of lawns.
  • Place a 3-ft wide barrier of wood chips or gravel between lawns and wooded areas to restrict tick migration into recreational areas.
  • Mow the lawn frequently.
  • Stack wood neatly and in a dry area. (This discourages rodents who would be used as tick hosts.)
  • Keep playground equipment, decks, and patios away from yard edges and trees.
  • Discourage unwelcome animals (such as deer, raccoons, and stray dogs) from entering your yard by constructing fences.
  • Remove old furniture, mattresses, or trash from the yard that may give ticks a place to hide.
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Indoor Environmental Control
If ticks are indoors, flea and tick foggers, sprays, or powders can be used. Inside, ticks typically crawl (they don't jump) up and may be in cracks around windows and doors. A one-foot barrier of insecticide, where the carpeting and wall meet, can help with tick control.
Prevent Ticks from Attaching
  • If your pet goes outside regularly, you can use some type of residual insecticide on your pet. Talk to your veterinarian about what works best in your geographic area. 
  • If you use a liquid spray treatment, cats and skittish dogs typically prefer a pump bottle because of the noise from aerosol cans. Doubling the amount of anti-tick product, or using two at once, may cause toxicity problems. Note: Any spray insecticide labeled for use on clothing should not be sprayed directly on pets.
  • Powders are fairly easy to apply, but they can be messy. (Avoid topical powders if your pet has a respiratory condition.)
  • Shampoos are useful only for ticks that are already on your pet.
  • A tick collar might be somewhat more water resistant than a residual insecticide, so if your dog likes to swim, the collar might be a better choice.
  • Flea combs can be used to help remove ticks.
  • Wash your pet's bed frequently.
How To Remove A Tick With Tweezers
  1. Use fine-tipped tweezers to grasp the tick as close to the skin's surface as possible.
  2. Pull upward with steady, even pressure. Don't twist or jerk the tick; this can cause the mouth-parts to break off and remain in the skin. If this happens, remove the mouth-parts with tweezers. If you are unable to remove the mouth easily with clean tweezers, leave it alone and let the skin heal.
  3. After removing the tick, thoroughly clean the bite area and your hands with rubbing alcohol, an iodine scrub, or soap and water.
  4. Dispose of a live tick by submersing it in alcohol, placing it in a sealed bag/container, wrapping it tightly in tape, or flushing it down the toilet. Never crush a tick with your fingers.
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Risk of disease transmission to you, while removing ticks, is low but you should wear gloves if you wish to be perfectly safe. Do not apply hot matches, petroleum jelly, turpentine, nail polish, or just rubbing alcohol alone (the tick must be pulled out after application of alcohol) because these methods do not remove the ticks and they are not safe for your pet.
Watch for Infection and Diseases
After you pull a tick off, there will be a local area of inflammation that could look red, crusty, or scabby. The tick’s attachment causes irritation. The site can get infected; if the pet is scratching at it, it is more apt to get infected. A mild topical antibiotic, such as over-the-counter triple antibiotic ointment, can help but usually is not necessary. The inflammation should go down within a week. If it stays crusty and inflamed longer than a week, it might have become infected.
Ticks can transmit diseases to pets and humans that the ticks contracted from a previous host.
Although ticks can transmit diseases, ticks are usually nothing more than a nuisance. The best approach is to prevent them from embedding, and once embedded, to remove them quickly. As long as you stay on top of the situation, your pets should cruise right through the tick season with no problems.
​Date Published: 05/29/2006
Date Reviewed/Revised: 03/19/2018​
URL: 
https://veterinarypartner.vin.com/doc/?id=4952474&pid=19239
41 Comments

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  • Home
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    • Services >
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