Sometimes chlamydia surface antigens change, and make it hard for the immune system to keep up. It also appears that chlamydia may release toxins that damage the immune response in some cases. (see related link).
Chlamydia trachomatis has only the human host.
the capsule (outer covering of the bacteria)
Because their immune system's are not good.
Viruses do not have the ability to evolve in the same way as living organisms with DNA. However, they can undergo genetic changes through mutations and recombination which can impact their ability to infect hosts and evade the immune system. This can lead to the emergence of new strains or variants of viruses.
Trypanosomes are a type of parasitic protozoa that can cause diseases in humans and animals, such as sleeping sickness in humans and nagana in animals. They are transmitted to their hosts through the bite of infected tsetse flies. Trypanosomes have a unique characteristic of being able to evade the host's immune system by changing their surface proteins.
Tapeworms are the adult class of parasites and they are fond of living inside the intestine of their hosts. Tapeworms passively avoid the host defensive system by host digestive system due to the tapeworms coating that keeps on producing by itself and use it as its defense mechanism.
Cyst formation allows parasitic protozoa to survive in unfavorable environments (such as outside the host), protecting them from harsh conditions. It also facilitates their transmission to new hosts, as cysts are more resistant and can be easily ingested by the host. Additionally, cysts help parasites evade the host's immune system and maintain their population over time.
Parasites have highly developed systems for attaching to their hosts, evading the immune system, and extracting nutrients. They have specialized structures like hooks, suckers, or adhesive pads that facilitate attachment, allowing them to establish a long-term relationship with their host. Additionally, parasites have evolved complex mechanisms to manipulate host behavior and immune responses to ensure their survival and reproduction.
/etc/hosts Only root can change it, users can view it
They get all their life needs by leeching the very life and energy out of any living thing it can infect, which is called a host. Anything the host eats, the parasites eats. When it wants a snack, it drinks some of the host's blood.
If you delete the hosts file then you would get too many pop up's and your system would take longer time to display the webpages .
It's called DNS