ACUTE HAEMORRHAGIC ENCEPHALITIS. 
99 
exudation into the cellular tissue ; this in turn produces more 
or less swelling and induration ; thrombosis obtains and death 
to the affected part. To assist in bringing about this condition, 
there may or may not be a direct injury to the part ; if an in¬ 
jury be received, then it might be termed the primary cause of 
the sore, but an injury would not result in a sore, unless the 
blood supply to the part was deficient in oxygen. The con¬ 
gested condition of the capillaries often extends for some dis¬ 
tance around the central point of injury, or the thrombosis ; in 
either case, the tissues are cut off from a normal supply of 
blood. 
( To be Conchtded in June Number .) 
ACUTE HEMORRHAGIC ENCEPHALITIS PREVALENT 
AMONG HORSES IN MARYLAND. 
By S. S. Buckley, Veterinarian, Maryland Agricultural Ex¬ 
periment Station, and W. G. MacCallum, Resident , 
Pathologist Johns Hopkins Hospital, Baltimore. 
Although a considerable literature on acute encephalitis in 
horses is to be found in the German and other veterinary peri¬ 
odicals, numerous cases in this country have apparently not 
been recognized. There has occured recently in Maryland an 
enzootic form of cerebral affection which was commonly diag¬ 
nosed and spoken of as cerebro-spinal meningitis and which 
was very fatal. The outbreak was preceded by another some 
months before, and, indeed, several other such outbreaks have 
occurred in previous years, the disease being thought by most 
observers to occur when the fodder crops had been bad and it 
was necessary to feed the animals with mouldy fodder. Exper¬ 
imental investigation is of course necessary before any such 
statement can be definitely accepted. 
The present note, therefore, is intended to call the attention 
of practitioners to certain changes which have been found at 
autopsy in the cases examined during the recent outbreak, in 
order that further observations as to the constancy of the lesion 
