The fact that when rabbits become excessively abundant in any locality
epizootic diseases often destroy them in large numbers has led many
people to expect that a micro-organism would be found which would afford
a ready means of rabbit control. The Biological Survey receives many
applications for such bacterial preparations. In reply to all of them it
has been necessary to state that thus far all attempts to spread
contagious disease artificially among wild rabbits have failed to give
practical results.