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Through the use of immune sera prepared from chickens, the crossserological study of 22 prototypes of bovine enteroviruses isolated in different parts of the world, allowed us to identify two serological groups each of which contained 11 viruses. The viruses of the first group are closely antigenically related although they can be distinguished in 'broad' and 'specific' variants, the latter showing asymmetrical serological relationships with one or more viruses of the same group. The viruses of the second group show antigenic relationships of a lower degree and may be divided into subgroups on the basis of their main antigenic correlations. The study of hemagglutinating properties toward rhesus monkey erythrocytes demonstrated that such properties are constantly present in viruses of group 1 and are lacking in viruses of group 2. On the basis of those data we elaborated a classification outline that proved to be useful in identifying 18 more strains of bovine enteroviruses in a satisfactory manner. [ABSTRACT FROM AUTHOR]

This study analyzed 76 consecutive patients with carotid transient ischemic attacks (TIA) and carotid lesions appropriate to symptoms who underwent endarterectomy during the period 1975-1981. The mean age of the patients was 51.9 +/- 8 years at the time of surgery. Hypertension was present in 32.9%, diabetes mellitus in 13%, ischemic cardiopathy in 8.2% and peripheral vascular disease in 6.6%. Operative mortality was 1.3% and harder morbidity 4%. The average follow-up was 2.6 years (range 1-7 years). The observed 5-year survival rate was 85.2% compared to the expected rate of 92.4% in a normal population. During the follow-up 5 patients had a stroke: the cumulative stroke rate was 4.6% at 1 year and 7.9% at 3 years. 18 patients had further TIAs (13 carotid TIAs and 5 vertebro-basilar TIAs). 6 patients suffered myocardial infarction. The prognosis of TIA patients treated with endarterectomy is difficult to evaluate because the natural history of TIAs is still undefined.

Sixty-one consecutive patients, less than or equal to 40 years old, were hospitalized for cerebral infarction between 1977 and 1985. Evaluation included computed tomographic brain scan, arteriography, echocardiography, and blood tests. A probable migrainous infarction was diagnosed in six patients (10%) (all women with a history of migraine) who survived the initial stroke and were followed-up for an average of four years. In five patients the stroke occurred during a common migraine attack and in one patient during a classic migraine attack. The site of infarction was invariably the occipital lobe. During the follow-up, no subject had a further stroke. All six women had a permanent hemianopic deficit.