[Platelets aggregation employing ADP and cephalin. Comparative tests (author's transl)].

The AA. have carried out researches into the results of the platelets aggregation test (PAT) on 375 people by use of the Born method; they have employed ADP and a commercial available cephalin (Thrombofax, Ortho). In the first case the parameters taken into consideration are: the minimum dose of ADP able to cause a "double wave aggregation", the slope and the maximum increase in light transmission; in the second case the parameters considered are: the latency period, the maximum speed and the maximum amplitude.

[Isolating and enriching broths of Salmonellae].

The Authors have tested in 3 isolating and enriching broths some Salmonellae; the broths are available commercially (MUELLER-KAUFMANN broth, LEIFSON broth and HAJNA GN broth) and they tested their inhibitory capacity (concerning the growth of intestinal saprophyte flora) and their enriching capacities with regard to the various types of Salmonellae also. The method used consists in an exact evaluation of the increase percentage of the germs which were put to incubate in the broths at 37 degree C for 6, 15 and 24 hours. On completing the tests it is clearly evident that the MUELLER-KAUFMANN and the LEIFSON broths are far superior to the HAJNA broth (which proved to be not very activated in decreasing the growth of the intestinal saprophytes).