What is really special with a Lyme disease infection is that the Borrelia spirochete is so hard to kill. This bacteria can stay in our body more than a decade.The answer why our immune system does not find it is because this bacteria is fooling our immune system totally.
A Borrelia spirochete is a very complex bacteria and the diseases that this bacteria can give us is also because the symptoms can be different from a person to another. Many infection has a start point and an end point. For example a throat infection, it starts – we get symptoms- we get treatment from the doctor and we get well. This is not the case with Lyme disease. Sometimes it can be hard to find a start point and no single point when we are absolutely sure that we are totally healthy. A borrelia spirochete can also change form so that antibiotic treatment is not a treat to this bacteria anymore. Because of its nature to change forms a Lyme disease infection can be very hard to treat.
Ticks
has tree growth phases- larvae-nymph and adult and in each phase a
tick need to eat one meal of blood from an animal.
When the tick is full of blood they let go and need to relax and take care of their food. After ech mean they can transform from one stage to another, for example from nymph to adult. The adult ticks has reach their end stage and will now ley eggs for the next generation of ticks.

Ticks are not very mobile. Researchers has found that a tick can move over an area of about three square meters. The climbs up and sits on a blade of grass and wait until a host animal will pass so they can stretch their front legs and grab the host animal whne it is passing by. When the tick is on the animal it starts to find a spot where the blood vessels are close to the skin so that they can start to feed.
The
adult ticks lay their eggs in early spring and when the heat rises,
the eggs develop in about one month to a larva. Most eggs are not
infected by Borrelia Spirochetes but researchers has found eggs
already with an infection. When the larvae begin to find a host
animal to eat at, it can be a tremendous spread between the
percentage of larvae that become infected and those that never get
infected. Some studies indicate that one percent of the larvae ca be
infected up to twenty percent. The greatest activity among the larvae
are in the middle of summer and during August.
The larvae are no bigger than half the top of a pencil, and they can be so small so they are almost impossible to see before they start sucking blood. The larvae eat mostly from mice and small animals. Some researchers believe that there is a huge number of ticks who gets infected when they suck blood from mice. We do not know where Borrelia spirochets live during winter but evidence suggests that there are mice that are the principal vector of the tick.
Then the tick start to feed on a mice it injects a chemical soap so the mouse shall not feel when the tick is biting and this chemical soap helps the tick so that the blood does not clot.
Borrelia spirocheters which clould move freely in the mouse bood is not finding its way into the larvae when it is eating blood. When the mouse blood comes into the larvaes stomach the borrelia spirochetes will connect with a special receptor called TROSPA.
This receptor binds proteins in the outer layer (skin) of the Borrelia spirochete. This special protein has the name (Osp, type A or Osp A) and will connect to the tick receptor (TROSPA) in the larvaes stomach. This process is also common among many other biting insects such as wasps, jellyfish and other bacterias. When the link is set up been between Osp and TROSPA the Borrelia spirochetes which are stuck in wall of the larveas stomach can spread in the whole tick.
The
larvae tend to eat up to five days before being let go in order to
digest food, and transformed into a nymph. This process takes about
thirty days.
The newly hatched nymphs spend time under the snow during winter and become active the next spring.
Many nymphs are infected and, depending on the cold during the winter months it can differ in the number nymphs that survives.
Unfortunately we have had several mild winters, so the amount of ticks is increasing rapidly in our forests. In areas with severe number of Lyme disease infections in humans researchers has found that up to 50% of all nymphs can be infected, or even more. Nymphs are the size of a pencil edge and is difficult to see. They try to suck blood from all animals that come close to them. It can be -mice, hedgehogs, badgers, deers and even humans.
Nymphs
eat longer than the larvae, up to four to five days are common and
after the meail they transform into adult ticks. This transformaiton
process takes around forty-two days. Since many of the nymphs are
infected nearly all animals in the area around the infected nymphs
can be vectors of borrelia spirochetes.

The adult ticks are larger and mainly active in the fall. They are easy to spot in comparison with nymphs or larvae but it doesnt matter and a lot of people get bitten anyway. Adult ticks will not start to feed on any small animal that is just passing by so they wait until a larger animal comes such as badgers, deer, cats, dogs and even humans. Once the adult tick has eaten they prepare themselves for the winter, those ticks that has not eaten do the same and if they survive a mild winter, they are active the next spring. Both those ticks who ate in the fall and those who will eat in the spring time will lay their eggs when the spring sun begins to shine and heats up the ground.
Each tick can lay approximately 2000-3000 eggs and a lot of birds and other insects can eat many tick eggs or if it was a really cold winter, many of the adults infected ticks can die during winter. When it is colder than +5 degrees ticks start to hide in the ground and if the temperature will get hotter than +32 degrees Celsius, the tick dies. The best for humans is if the temperature will go down well below the freezing point and there is no snow that is isolating the ground. When this happens a lot of ticks dies too.
Unfortunately,
humans have went into the countryside and trid to control the number
of animals that can for example eat our crops. This has led to that
many birds and insects have died which will reduce the amount of
potential threats to the quantity of ticks and they therefore start
to reproduce on a larger scale. The two largest threats to ticks are
reduced number of host animals and a colder climate. If we shall
believe AL Gore and the climate researchers we shall not get colder
winters in the future. Today we do not have too many predators in the
Swedish forest anymore which can hunt the deer. A deer can have up to
2000 ticks on tis body and can also move over large areas. A deers
natural enemies such as lynx and wolfs is almost gone from our
forests and the only predator that is left is we humans. Now when we
shall be the top predator ther can be a conflict how many deers that
we shall have in a specific area depending how much some people want
to hunt not if some animals are weak and can be an easy meal for a
wolf. This can have a negative effect and that is that we can get
more animals even in urbanized areas which will increase the
probability that they drop ticks in our backyard and that we get
infected by ticks. Global warming will almost certainly increase the
number of pathogenic bacteria in our neighborhood too. Once doctors
understand how the borrelia spirochete works and found a complete
treatment plan that works for all those who get infected a far worse
bacteria find its way to Europe and also up to Sweden.