...Absolute safetyagainst this contagion is secured only by a total avoidance ofthe walks of the infected animals, till repeated rains, or whatis better, frosts, have disarmed the virus of its malignity... 
Richard L. Allen 「Domestic Animals」
...It is regarded as safe practice to use onlyspore-destroying substances for the virus of those diseases of which we have nodefinite knowledge...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...It is nowconceded that foot-and-mouth disease is propagated by a specific virus and thatevery outbreak starts from some preexisting outbreak...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...A wide distribution of the virus and a rapid infection of a herd is theresult...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...A method of vaccination applicable to animals, consisting of asingle injection of a suspension of "fixed" rabies virus, is now being quiteextensively employed by veterinarians...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...The fact that tuberculous material from human subjects often failed toproduce serious disease in cattle was observed by a number of the earlierinvestigators who experimented with such virus...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...By vaccination we understand the injection of a minute amount ofattenuated—that is, artificially weakened—blackleg virus into thesystem...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...This virus is obtained from animals which have died from blackleg, bysecuring the affected muscles, cutting them into strips, and drying them in theair...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
..., whence the susceptiblecattle obtain the virus secondhand...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...The contagious typhus of the ox not being a real typhoid fever, we shallnot, consequently, be able to borrow from it the preventive virus forthat disease in man...
Honoré Bourguignon 「On the cattle plague: or, Contagious typhus in horned cattle. Its history, origin, description, and treatment」
...From the appearance of the body and theevidence which had been adduced, witness was of opinion that the deathof the deceased was caused by the absorption of poisonous virus from thedead beast...
Honoré Bourguignon 「On the cattle plague: or, Contagious typhus in horned cattle. Its history, origin, description, and treatment」
...The virus of corruption is introduced; and, if not treated in time, the wound proves fatal...
J. Henri Fabre Alexander Teixeira de Mattos 「The Life of the Fly」
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