[Incidence of urinary tract diseases among workers in the Masovian Refining and Petrochemical Plants in Płock 1978-1981].

The studies were aimed at estimation of the incidence rate of genito-urinary tract diseases among employees of the Mazovian Refining and Petrochemical Plants in Płock. In 1978-1981, 873 employees were examined, including 244 females and 629 males. Most of them, namely 572 (65%), were employed in those plants for more than 5 years.

Distribution of blood groups of the ABO system in patients with urolithiasis.

The relationships between urolithiasis, ureterolithiasis and blood groups have been analysed. The examinations of 1451 women and 1611 men confirmed the occurrence of statistical relationships of blood groups A, AB and 0 and those diseases. They did not occur in blood group B.