90 
PROGRESS OF VETERINARY SCIENCE AND ART. 
The simple aphthous eruption is distinguished by Kreutzer* 
from the phlyctenoid variety. The latter, he says, is the benig- 
nant stallion’s disease of Hertwig and other authors. Both affect 
horses, cattle, and sheep. The aphthous disease, Aphtha geni- 
talium in general unaccompanied by fever, runs through its 
course in from two to four weeks. Transparent, whitish or 
yellowish, delicate vesicles, varying in size from a linseed to 
a pea, appear on the inner margin of the labia pudenda; 
shortly after, however, also on the outer surface of the vulva 
of the female : and in the male they occur on the penis, espe- 
cially on its middle portion. The vesicles in a few days 
burst, leaving behind them quite superficial, roundish ulcers, 
with unbroken edges, a red base, not emitting pus, but a 
yellowish, glutinous, scanty secretion, which dries on expo- 
sure to air, forming a flat, brownish, thin, scaly scab. The 
scab on falling leaves behind a round, white, smooth cicatrix. 
Moreover, here and there is a slight superficial irritation, and 
a flow of yellowish, glutinous secretion, easily dried on expo- 
sure to the air ; this is more especially witnessed in the region 
of the clitoris. Sometimes large bladders or vesicles form, 
which are not limited to the generative organs, but exist on 
various parts of the skin, such as over the neck, head, &c. 
It is a contagious, but extremely mild disease. 
It remains for us to speak of the phlyctenoid eruption of the 
genitals, an4 of the third variety, which we shall for con- 
venience term malignant disease of the same. We purpose 
giving a translation of a diagnostic table published by Hert- 
wig in his memoir, in 184S, when the phlyctenoid eruption 
was looked upon as the same disease as the other, only differ- 
ing in severity. Having thus concisely brought forward the 
symptoms of the two affections, we shall then show M. Rod- 
loff’s views, and then we may profitably discuss on some 
important points connected with them. 
Malignant Eruption. Phlyctenoid Eruption. 
1. A chronic affection, lasting 
several months, and even for more 
than a year. 
2. In its lengthened course the 
disease spreads from the generative 
organs to the lymphatic and nervous 
systems, and in accordance with this 
progress three different stages of it 
are recognised. 
1. Of short duration, running 
through its stages in from two to 
five weeks. 
2. This affection in reality is con- 
fined entirely to the genitals, no 
symptoms of a morbid condition of 
the nervous or lymphatic systems 
occurring. 
* ‘ Grundriss der gesammten Veterinarmedizin,’ Erlangen, 1858. 
