[Alpha-2 macroglobulin in serum and synovial fluid of patients with rheumatoid arthritis and osteoarthrosis].

Aim: To study concentrations of alpha-2-macroglobulin (A-2-MG) in blood serum and synovial fluid (SF) in patients with rheumatoid arthritis and formulation of basic clinical, laboratory and x-ray criteria of RA activity.

Materials And Methods: A-2-MG levels were measured in the serum and SF from 151 RA patients and in the serum of 20 patients with osteoarthrosis (OA) and 62 healthy donors. The serum concentration for RA patients was 166 +/- 65.

Pneumoconioses in Bulgaria--prevalence, development, prognosis and prevention.

Prevalence of the basis types of pneumoconioses (silicosis, silicotuberculosis, asbestosis) in Bulgaria was studied during a 7-year period (1985-1991). Information was taken from reports of the Department for silicosis and other pneumoconioses control in the country. As a basis of the investigation serves the total number of workers endangered by dust exposure in different risk branches.

[Morbidity with temporary loss of work capacity in the workers of the Belmeken-Sestrimo hydroelectric cascade].

The present work presents the results from the analysis on the morbidity with temporary disability from cascade "Belmeken-Sestrimo" (n = 94, men 73, women 21). By means of personnel method are studied the cases of morbidity with temporary disability and defined the basic and enlarged number of indices, analysed in sex, age, length of service, nosological structure and dynamics for a period of 3 years (1987-1989) for the 3 sites of hydroelectric cascade "Belmeken-Sestrimo", water-power station "Momina Klisura", hydroelectric station "Sestrimo" and water-power station "Belmeken". The results point out to low and average levels of morbidity with temporary disability, with traditional arrangement of their nosological affiliations (diseases of the upper respiratory ways, cardio-vascular system, nervous system etc.

[Lipid and mineral metabolism and morbidity with temporary loss of work capacity in miners].

Examination is performed on 87 miners from mine for copper production subject to intensive local vibrations with average rate of increase (K) of the norms for the individual octave frequencies 2.4 times for 3 h exposure of the working shift, as well as to intensive noise--113-115 dB/A equivalent level, general dust--23 mg/m3, fine dust--3.5 mg/m3 and fine quartz--0.