...By this time both the Mistress and the Masterwere infected with the most virulent type of theShow Germ... 
Albert Payson Terhune 「Lad: A Dog」
...Under its more virulent form it is not to be thus easily got rid of,though even then it is to be subdued...
Dinks, Mayhew, and Hutchinson 「The Dog」
...I cannot account for so virulent a form of skin diseaseaffecting pups; but certain it is, that they have scarcely left the dambefore its signs are to be detected...
Dinks, Mayhew, and Hutchinson 「The Dog」
...It is important to observe in thisconnection that 2 out of 4, or 50 per cent, of the cultures obtained fromcases of generalized tuberculosis in children proved virulent for cattle...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...A farmer who had lost an ox in consequence of that virulent distemper,buried it in one of his fields...
Honoré Bourguignon 「On the cattle plague: or, Contagious typhus in horned cattle. Its history, origin, description, and treatment」
...Its employment in houses,therefore, is rarely followed by the annoying odor which attends the useof the more virulent poisons...
David Lantz 「Methods of Destroying Rats」
... and the poison is said to be evenmore virulent than that of the dreaded cobra:"—...
A. Mueller 「On Snake-Poison: its Action and its Antidote」
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