Arthritis acute or chronic inflammation of the joints due to infection, metabolic disorders, neuroendocrine disorders, trauma and other Involvement of two or more joints at the same time or over a short period (up to 3 months.) termed "arthritis".
According to the Soviet classification of diseases of the joints, adopted in 1959, the all-Union Antirheumatic by the Committee, all diseases of the joints are divided into the following groups.
1. Arthritis (polyarthritis) infectious diseases (inflammatory).
This group includes joint diseases caused by specific infection, such as tuberculosis (see Tuberculosis of bones and joints), gonococcal, brucellosis and other. These include rheumatic (see Rheumatism) and non-infectious arthritis (arthritis).
2. Noncommunicable arthritis (degenerative).
This group includes chronic arthritis deformans, arthritis endocrinopathies and disorders of metabolism, for example gouty (see Gout), and professional arthritis.
3. The traumatic arthritis, arthritis purulent
4. Arthritisassociated with other diseases (diseases of the blood, lungs and other).
5. Rare forms of arthritis (intermittent dropsy of the joints, arthritis drug disease and others).

Arthritis in children

Arthritis in children have many similarities with the disease in adults, however, the outcome of arthritis in children more serious breach of growth leg of the affected joints. Arthritis in children are divided into acute and chronic. Acute arthritis develop mainly after infectious diseases: pneumonia, meningitis, septic conditions, typhoid and paratyphoid. Characterized by swelling, pain during movement. When treating the underlying disease, these changes disappear. Children very often arthralgia as a consequence of allergic conditions of the type of serum disease, and chronic intoxications (tuberculosis, tonirovannoye and others). A group of chronic joint diseases in children are arthritis tuberculosis (see Tuberculosis of bones and joints), brucellosis etiology (see Brucellosis)and infectious nonspecific polyarthritis (see of still's disease).

Arthritis (from the Greek. arthron " joint") is a large group of diseases of the joints infectious inflammatory, dystrophic, and mixed character.
In some diseases of joints arthritis is a major manifestation of the disease, while others - only a symptom of the disease. Given the difficulty of clinical differentiation lesions of the joints of inflammatory and degenerative origin, on the recommendation of the all-Union Antirheumatic Committee in the USSR made this diverse pathologies to determine the General name "arthritis".
Arthritis is a widespread disease. In the USSR a relatively common cause of temporary disability are rheumatic, infectious nonspecific (evolutionary) and dystrophic A.
For the development of the doctrine of rheumatic A. outstanding importance was the work of S. P. Botkin, G. A. Zakhar'in, G. I. Sokolsky and buyo. In the USSR the first scientific classification A. Dana H. A. Velyaminov.
The etiology and pathogenesis
In a complex group of arthritis include diseases of different etiology and pathogenesis. Integration A. possible etiological characteristics (A. with certain infectious etiological factor), on the main pathogenetic mechanism (allergic, dystrophic A.), by the most prevalent loss of connective tissue (collagen, autoimmune diseases). In the pathogenesis of various A. can be set to many other factors: gender, age, occupation, climate, nutrition, physical activity, injury, co-infections, in particular focal and genetic factors (for example, when some of collagen diseases, nodes Heberden and others).