The Host

When a foreigner invaded, Melanie refused to give up her idea. Alien, a wanderer, must bear the challenge of listening to Melanie's idea of ​​human resistance to colonies. Melanie and the wanderers fight the same man's love

In order to survive and propagate in the host, it is necessary to (1) form a colony in the host, (2) find a niche that is nutritious to the host, (3) avoid, destroy or avoid adaptation of the host It must be able to do. Sexual immune response; (4) use host resources for replication; (5) spread to new hosts. Under severe selection pressure only the correct host cell response is induced to achieve this complex task and pathogens have evolved mechanisms to maximize their use of host biological biology. Many of the pathogens discussed in this chapter are skilled and practical cell biologists. By observing them, we can learn a lot of cell biology.

Overview of pathogenic bacterial mechanisms (A) When encountering a human host, bacterial pathogens violate some host responses and may use various mechanisms to circumvent host defense. Bacterial components that interact with the host include: (1) capsules that act to "prevent" phagocytosis, protect the pathogen from macrophages and neutrophils, (2) lipopolysaccharide (LPS) and infection cause. The shock cell wall component (3) can be used for attachment factors to destroy host cells and contribute to invasive toxins, and (4) to promote the binding of pathogens to the host surface. The extent to which these different mechanisms play a role in the pathogenesis of infection depends on the species or strain of bacteria, the site of invasion of the pathogen, the immune status of the host, and other similar factors. (B) Once attached to the host surface, bacterial pathogens may further invade the host tissue.

A parasite is defined as an organism living in or on another organism called a host (2). If a parasite is likely to cause a disease in the host, the parasite is called a pathogen. The host disease is caused by parasitic infections. The interaction between host and parasite is complicated. In some cases, both the pathogen and the host struggle to survive. The pathogen divides within the host or on the host in an effort to make the species survive, while at the same time the host's defense mechanism attempts to eliminate the pathogen. The extent of "battle" of survival depends on the relationship. In this article I will explain the pathology of Chlamydia, ie how organism invades the host, avoids the host defense mechanism, breeds in the host, and is released from the host. Certain aspects of Chlamydia are compared to other pathogens, rickettsia, herpes virus.