806 
W. H. LOWE. 
cine that many of the now known scientific facts w~ere discovered 
and demonstrated, and as many of the diseases of animals are 
transmissible to man the subject assumes an importance of no 
small proportion when considered from the standpoint of hygiene 
or public health. Well, indeed, may the New Jersey Sanitary 
Association give consideration to this subject. 
By investigations and experiments conducted by veterina¬ 
rians on Texas fever of cattle it was found that cattle in the in¬ 
fective district carried in their blood the contagion of Texas 
fever; that it was due to a protozoan organism, Pyrosoma bige- 
minum , analogous to the parasite of human malaria, and that this 
parasite was transferred to susceptible cattle outside the infected 
district by the Southern cattle-tick, Boophilus bovis. The ex¬ 
periments alluded to are interesting to the scientific investi¬ 
gator and make a remarkable chapter in the progress of medical 
science. They have already led to extensive studies of the 
part played by insects in the propagation of human diseases 
and particularly malarial fevers, opening up a new field in med¬ 
ical research, by which it was discovered that mosquitoes are 
responsible for spreading malaria. 
No fact has drawn a closer relation between animal and hu¬ 
man diseases or the protection of the public health through 
domestic animals than the introduction of the antitoxin prin¬ 
ciples of serumtherapy. The immunizing of animals against 
fatal contagious diseases; the rapid and certain diagnosis of 
latent diseases, which cannot be known by physical symptoms, 
and their early isolation before they have spread their disease 
germs among their kind, and to the human family ; the cure of 
some diseases by the administration of repeated doses of atten¬ 
uated virus and the prevention of development of disease by 
their early administration are phases of veterinary science which 
make it a great preserver of the public health. Contemplate 
for a moment the importance of tuberculin used for the diag¬ 
nosis of tuberculosis in dairy cattle ; mallein used for the diag¬ 
nosis of latent glanders in the horse ; vaccine employed to pro¬ 
tect mankind from small-pox; tetanus antitoxin employed in. 
