CASES OF FAYDS CONTAGION FROM THE LOWER ANIMALS. 455 
ratching on their part, so that in the case of these mice 
hen the head is affected, which I have found invariable, 
ey scratch and scratch, until not only the skin and subcuta- 
l Ous tissues, are eroded, but even by the combined influence 
the irritation and scratching, I have found the calvarium 
i places destroyed and the parasite affecting the brain and 
membranes, so that the little animals became wild with the 
■itation and inflammation set up. 
I remember very well many years since, in the family of 
distinguished jurist, among my clientele, the young ladies 
the family, braver than ordinary, were wont to make fun 
: a family of what they called crazy mice, who would come 
t when people were present, run up window curtains, and 
all manner of objectless things apparently, who had no 
4 r when pursued, but would allow themselves to be caught 
' th the hands, etc. They, at my request, sent me one. Its 
:ad was covered with the favus crust, the calvarium worn 
; r ay to large extent, cerebrum exposed and apparently af- 
::ted. No cases of contagion appeared in the family, and 
easures were soon adopted by my advice for the destruc- 
:>n of the surviving rodents. 
As to contagion of other cryptogamic parasites, I have 
pn many cases in individuals and families of trichophytosis 
ngworm), cats being the infecting media. The last, only 
ew days since, in an infant of less than six months, a mangy 
I tie kitten picked up in the street, given to it in the crib to 
:iy and sleep with, etc. The case was brought to my clinic ; 
next visit the kitten was also brought at my request, and 
appearance justified the diagnosis. 
The most interesting case of the kind I ever had was in a 
wish family of moderate means, where the whole of a nu- 
• ?rous family of children, the eldest a girl of about fourteen, 
d a little female domestic not much older, slept in the same 
'3m on pallet beds, were found to be affected with circin- 
be ringworm. They had also a mangy kitten,'evidently 
i source of trouble, picked up by one of the family, and 
^de a pet and bed companion, going to each bed as it 
t like. The amount and variety of circinnate lesions were 
