The authors investigated the incidence of campylobacteriosis in the population of the district during 1989-1990. During the above period by cultivation 723 cases of the disease were confirmed, i.e. the incidence in 1989 was 319, the number of cases 428, in 1990 the corresponding figures were 220 and 295. The incidence of campylobacteriosis is significantly higher than that of other investigated bacterial diseases. The authors did not find a significant difference in the incidence of campylobacteriosis between the two sexes (1989 M:F 1.07:0.93, 1990 M:F 1.1:0.9). The incidence of campylobacteriosis had a seasonal character with a maximum in the summer months, in particular in June. From investigation of sources of infection and transmission factors ensues that in the district the greatest part in children is played by contact with domestic animals and in adults by consumption of non-pasteurized sheep cheese. As to other factors of transmission in particular products from domestic pig slaughtering and the consumption of grilled chickens play a part. Disease caused by contact was found only in 1.3% of the patients in 1989 and in 2.4% in 1990. Combined infections were reported in 1989 7x (5x with Salmonella, 2x with Yersinia), in 1990 3x (2x with Shigella and 1x with Salmonella). In 1989 59 patients were hospitalized (15.8%), in 1990 42 patients (14.6%).