CLINICAL MEDICINE

rIl Leptospirosis in the Dog. Since L::::J June, 1941, five cases entering the college clinic have been definitely diag-nosed as canine leptospirosis. It is highly probable that this disease is more preva-lent than has previously been diagnosed. Leptospirosis is a communicable dis-ease known in man as Weil's disease and found in the dog and the rat. Leptospira icterohemorrhagicae or Leptospira cani-cola, the mfectIve agents, are Indlstm-guishable morphologically, both being motile, non-flagellated spirochetes. It is thought that the rat is a very important factor in the transmission of the disease either by direct biting or through th