tuserlala: Kenneth todor, ph.

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Kenneth Todor, Ph.D.

agent is a microorganism can cause disease in

plants, animals or insects. Pathogenicity is the ability of products

disease in the host. Microbes express their pathogenicity on

means th virulence, a term that refers to the degree of pathogenicity

microbe. Thus, virulence determinants

originator of any of its genetic and structural or biochemical

features that allow it to produce disease in the host. The relationship between host and pathogen is dynamic, because each

change activities and functions of the other. The result of such

relations depend on the virulence of the pathogen and relative >> << degree of stability or susceptibility of the host, mainly due to efficiency

mechanisms of immune protection. , Probably the most common pathogens

people can call to one third of all >> << bacterial diseases, ranging from boils and pimples on food poisoning, in

sepsis and toxic shock. Electronic microphotographs >> << s

with his permission. A. the ability to invade tissues. It includes mechanisms for

colonization (adherence and initial multiplication

Production of extracellular substances that facilitate the invasion

opportunity to circumvent or overcome many protective mechanisms.

2. is able to produce toxins. Bacteria can produce two types of toxins

called exotoxins and endotoxins. Exotoxins released from bacterial cells and may act on tissues removed from the site

site of bacterial growth. Endotoxin is a cell-associated

matter. (In the classical sense, the term refers to the

lipopolysaccharides outer membrane component of gram-negative bacteria

). However, endotoxins can be released from the growing bacterial cells and cells

, lizuyutsya that as a result of effective protection of the body (such as lysozyme)

or of certain antibiotics (eg penicillins and cephalosporins

). Thus, bacterial toxins, both soluble and cell-bound, can be transported by

blood and lymph and cause cytotoxic cheap strattera effects on tissue areas remote from

starting point invasion or growth. Some bacterial toxins can also

act in place of colonization and play an important role in the invasion. Mycobacterium tuberculosis,

agent of tuberculosis (TB). Bacteria are small pink color rods.

More than one third of world population infected. The organism has caused more human deaths than any other bacteria in the

history. Despite its ability to produce disease

multifactorial, it is not completely understood. American Society of Microbiology

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