564 DISEASE IN WILD MAMMALS AND BIRDS 
sterilization should be thorough if practiced. By con- 
stant vigilance we believe that our large exhibition house 
is protected, but the sanitation of the pond, where many 
ducks have the disease, can never be so satisfactory. 
Mycosis among mammals as an organic pathological 
entity is certainly a rare condition, indeed almost always 
to be considered an accidental or secondary one. In so 
far as human pulmonary disease is concerned it is among 
the pathological curiosities deserving of individual 
report. Moulds of several varieties have been found in 
intestinal ulcers, in cranial sinuses and in the ear, while 
generalized mycosis from thrush and favus are reported 
(cases of thrush in kites with fatal outcome has been 
described on page 168). Cutaneous infestation with 
mould is quite another matter for ring worms and similar 
conditions are now believed to be due solely to the pene- 
tration by spores and mycelia into the superficial dermis 
and into hair follicles. Numerous small lesions have been 
detected on dogs and cats that correspond to the ring 
worms described for them; to these we have devoted little 
study, because when discovered the animal is removed, 
treated or killed to protect others. Doctor Weidman has 
discovered several varieties of hj-phomycetes which he 
mil report upon at a later time. No case of generalized 
mould disease has been found in mammals, but Doctor 
"Weidman has discovered a hitherto undescribed mould 
in ulcers and cutaneous abscesses of seals ; no ex- 
tension beyond subcutaneous areolar tissue occurred in 
these cases. 
Botrj^omycosis, while not strictly belonging to the 
foregoing group, may be mentioned here because of its 
nodular tumor-forming superficial growths. The case to 
be cited certainly belongs to this illy defined group of 
diseases even if the organism was not isolated. It cannot 
be accepted as wholly demonstrated that the disease 
described under this name is always the same or that it 
has a single cause. 
