The Boston Society of Medical Sciences

1871 Boston Medical and Surgical Journal  
May 2d, 1871, tho Society met at the house of Dr. Jeffries, Dr. Hayden in the chair. Dr. Blake exhibited a specimen of vegetable parasite from the external auditory moatus, apparently a bastard Pénicillium on a primary growth of Asporgillus nigricans, taken from a case in which the latter growth had persisted for about three months, at the end of which time a white growth appeared at the outer portion of the moatus, continuous with the growth of aspergillus further in. The microscope revealed a
more » ... croscope revealed a thick network of mycelium, resembling that of Pénicillium glaucuni Leukhardtii, interspersed with oval brown cells having a double outline Planted on lemon-peel, a largo cross of tho Leptothrix form of Pénicillium was the result. Tho fact that the patient had been in the habit of moistening the outer end of the meatus and encouraging a condition favorable to the growth of Pénicillium increases the probability that the specimen exhibited was a bastard Pénicillium, while tho assertion of Prof. Wreden that in none of the cases observed by him did he find Aspergillus and Pénicillium together makes the case of greater interest. In reply to Dr. Ellis, Dr. Blake said that these growths of Aspergillus were not generally found in otorrhcea, but rather in eczematous conditions of the moatus, or where there was some abrasion of the cutis. Dr. White inquired as to the value of the hyposulphites in such cases, and said that in parasitic growths on the skin he had found them of no value whatever. Dr. Blake thought that the continued removal of the growth by syringing was all that was necessary to get rid of it. Dr. Groen said that in the cases observed by him lie had used the hyposulphites, and had examined the masses removed after their use, but had been unable to detect any changes either in the spores, sporangia, or mycélium, and, in these cases at least, he could say that the shrivelling of the different parts of the growth, as described by Wreden, was not present. The removal of the growth by syringing, continued for a considerable time, seemed all that was necessary for its complete destruction, and this had been confirmed by several other American observers. Dr. Nichols stated that the Aspergillus finds a very favorable soil in birds, the parasite being found in large quantities in the nostrils, intestines, &c. Dr. White said that in insects vegetable parasites were also frequently seen. Dr. Jeffries then gave a sketch of the present known histology of the percipient elements of the retina in man and in animals. He explained at length the discovery of Schultze of the plate structure of the outer membrane of rods and cones in the vertebrates, and of the " optic rod" in the invertebrates, and dwelt especially on this point. His remarks were illustrated by a largo number of diagrams and drawings done by himself. Dr. Wadsworth said that Landock denied Schultzo's investigations, considering that the plates broke up into cubes, and that the so-called nerve fibres were fibres of connective tissue. Dr. Jeffries said that in working up his subject he had been impressed with Schultzo's honesty of investigation, and was inclined to take his results, although Schultze himself said that theso investigations of his might lead to further research which would upset his discoveries. Dr. Fitz showed several specimens to illustrate some points of tuberculosis. The case was one of acute miliary tuberculosis, in which there was also chronic tuberculosis of tho epididymis and vcsiculoe seminales. Tho main interest in the specimen was due to tho presence of the miliary tubercles in the mucous membrane of the genital tract. These were found in tho periphery of the masses in the ducts, which masses had, as a rule, undergone cheesy degeneration. On removing the cheesy contents of the enlarged ducts; in some instances minute cheesy tubercles which had not softened were found, this result favoring the idea that the bulk of cheesy material in these cases is rather to be deduced from catarrhal products than from softened tubercle. June 8th,
doi:10.1056/nejm187108170850703 fatcat:tepvb2oaenhj5ljemwnrtjx2cq