ACTIXOMYCOSIS. 43S 



ami in either case mounted in glycerine. But although the fungus 

 can be detected without any staining process, there may sometimes 

 be doubtful appearances, and then cover-glass preparations should be 

 made and stained by the method of Gram with eosin. The filament - 

 c-a ii be readily recognised, and this is of great value, as it form- 

 an additional means for the diagnosis of the disease. In combination 

 with orange-rubin we have a test that is as* characteristic and useful 

 as staining for tubercle bacilli. The discharge, scraping from ;i 

 growth, sputum, or the isolated fungus is squeezed between t\\.> 

 cover-glasses, which are then slid apart ; they are allowed to dry, 

 passed through the flame in the ordinary manner, and then stained. 

 The cover-glasses can be cleared in clove-oil, the excess of clove-oil 

 being removed by gentle pressure between pieces of blotting-paper, 

 and then the preparation can be mounted in balsam and rendered per- 

 manent. On examination of these specimens the masses of filament- 

 will be found to be stained blue, and the tissue elements pink. These 

 filaments vary very much in extent and character in different pre- 

 parations. In some cases there are masses of short threads, which 

 are either straight, sinuous, or twisted, and branched. In other 

 parts the field is occupied by very short, straight, or curved and 

 sometimes spiral fragments ; in others, again, there are comparatively 

 long strands. On examination with a high power, and with careful^ 

 illumination, some filaments will be observed to be moniliform, 

 while others are provided with a terminal oval body. There are 

 also free spherical, and oval, bodies stained blue, which represent th> 

 spores of the organism. When orange-rubin is used instead of 

 eosin, the clubs will be stained and easily recognised. This method 

 enables one to determine the exact relation of the threads to tin- 

 club-shaped bodies ; and this is an interesting point, as it has been 

 suggested that the threads are not connected with the clubs, bir 

 merely an adventitious micro-organism growing in the track ot 

 ray-fungus. The threads are stained blue and the cluh> crh: 

 In theVunger clubs the protoplasm of the thread can U- traced into 

 the interior of the club. In some of the older clubs the cent.,1 

 portion takes a yellowish stain, and in others the pvrfopka 

 continued as a thread, but is collected into Bpherioal, 0* 

 pear-shaped mass. In others again, irregular grain* rtained 

 scattered throughout the central portion. The sheath of 

 is stained pink; and the protoplasm, rtained bh* ill> 

 conosta of small spherical or irregular grains, giving . 

 beaded appearance. 



The effect of various reagents should be tried upon tl 



