Archive image from page 319 of The pathology and differential diagnosis The pathology and differential diagnosis of infectious diseases of animals differentpathology00moorrich Year: 1908 296 DISEASES CAUSED BY SPIRILLACEAE of the red corpuscles show a slight irregular motion, and when closely watched it may be noticed that this disturbance may proceed in a certain direction, or again whirl round in the same place. When examined under a high power (i-i2th inch obj.) the agile spirillum is usually seen attached to one or more red corpuscles. Sometimes it is curled all round a red or white corp
Archive image from page 319 of The pathology and differential diagnosis The pathology and differential diagnosis of infectious diseases of animals differentpathology00moorrich Year: 1908 296 DISEASES CAUSED BY SPIRILLACEAE of the red corpuscles show a slight irregular motion, and when closely watched it may be noticed that this disturbance may proceed in a certain direction, or again whirl round in the same place. When examined under a high power (i-i2th inch obj.) the agile spirillum is usually seen attached to one or more red corpuscles. Sometimes it is curled all round a red or white corpuscle. As soon as the organism becomes free and begins to travel through a clear space, a characteristic undulating movement is visible, which continues until it finally attaches itself to some other blood corpuscle. This motion may be noticed for some time ; it then becomes relaxed, and finally slackens down completely. I have observed the movements in preparations which were twentj'-four hours old. 'Staining of the organism may be obtained with any of the aniline dyes used in bacteriology, viz., methylene-blue, fuchsin, thionin. Good preparations were obtained with Ivaveran's modification of Romanowsky's stain, and also with Azur II. In using the last two mentioned methods no chro- matic bod}' could be traced, such as is present in parasites belonging to the protozoa. 'Cultivations on the usual artificial mecia were repeatedly tried, but al- ways with negative results. The same has been found to be the case with all the above-mentioned different spirilla found in men and birds. ' uarJ ? 224. A disease of the pig due to spiro- chaetes. Dodd has recently described a spirochaete which he found in a pig sent to the government laboratory in Pretoria. The examination showed very few morbid changes in the tissues Spirochaetes from the lesions in the skin of a pig {after Dodd).
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