No abstract

No abstract

Ultrasonography (US) and serology (double diffusion for antigen 5 (dd5» were used for the screening of hydatid disease in 1418 asymptomatic individuals from two provinces in Argentina. A total of 122 positive subjects were identified and in 120of them lesions consistent with hydatid disease were observed at US (98.4%) while only 19 had positive dd5 tests (15.8%). Chest radiography was performed in 647 of the subjects and an additional 4 lesions were found. Surgery was performed in 32 patients, confirming in all of them the sonographic diagnosis. It is suggested that US should be used in the screening for hydatidosis in high-risk populations as well as in follow-up programmes.

Fluorescence in situ hybridization with a cocktail of whole-chromosome probes, specific for human chromosomes 1 and 2, was performed to analyze the induction of translocations and dicentrics in human peripheral blood lymphocytes exposed to 100 KVp X-rays and cultured for 48 h. The dose-response curves for both aberration types were linear-quadratic, with similar coefficients, and after correction for genome content were a little lower than the dose-response curve for dicentrics established by conventional analysis. Three doses were also assessed after 76-h culture. The dicentric yield at 76 h was reduced compared with that at 48 h because of the existence of second and third division metaphases. The translocation yield did not reduce except at 4 Gy. The frequency of cells containing both dicentrics and translocations suggested that their occurrence is not correlated. The importance of stating the scoring criteria and of specifying the different types of aberrations is stressed.

No abstract