[Listeria strains isolated from sick animals and consumed silage].

Forty-eight strains of listeria isolated from sick animals (27 goats, 19 sheep, 2 cows) from 33 farms, and 40 isolated from the silage eaten by these animals were studied. Listeria were isolated more frequently from poor quality silages than from those of good quality, although they were found in 11 out of 31 excellent silages with a pH value comprised between 3.6 and 4.

Thrombosis prevention by acetylsalicylic acid in hyperlipemic rats.

In rats, administration of acetylsalicylic acid (ASA) by stomach tube two hours before blood removal, or addition of the drug to platelet-rich plasma in vitro, markedly inhibited platelet aggregation induced by thrombin, ADP and collagen. Addition of ASA in vitro to human platelet-rich plasma also inhibited platelet aggregation by thrombin, ADP and collagen. In hyperlipemic rats, ASA (100 to 200 mg.