• WordNet 3.6
    • adj infectious easily spread; children catch it from their elders"- Bertrand Russell "fear is exceedingly infectious"
    • adj infectious caused by infection or capable of causing infection "viruses and other infective agents","a carrier remains infective without himself showing signs of the disease"
    • adj infectious of or relating to infection "infectious hospital","infectious disease"
    • ***
Webster's Revised Unabridged Dictionary
    • Infectious Capable of being easily diffused or spread; sympathetic; readily communicated; as, infectious mirth. "The laughter was so genuine as to be infectious ."
    • Infectious (Law) Contaminating with illegality; exposing to seizure and forfeiture. "Contraband articles are said to be of an infectious nature."
    • Infectious Corrupting, or tending to corrupt or contaminate; vitiating; demoralizing. "It [the court] is necessary for the polishing of manners . . . but it is infectious even to the best morals to live always in it."
    • Infectious Having qualities that may infect; communicable or caused by infection; pestilential; epidemic; as, an infectious fever; infectious clothing; infectious water; infectious vices. "Where the infectious pestilence."
    • ***
Century Dictionary and Cyclopedia
    • infectious Communicable by infection; easily diffused or spread from person to person or from place to place, as a disease, a moral influence, or a mental condition: specifically applied to diseases which are capable of being communicated from one to another, or which pervade certain places, attacking persons there, independently of any contact with those already sick. Infectious diseases include contagious and miasmatic diseases.
    • infectious Capable of communicating infection; that infects, taints, or corrupts; contaminating: as, infectious clothing; infectious air; an infectious vice.
    • infectious In law, capable of contaminating with illegality; exposing to seizure or forfeiture.
    • infectious Synonyms Catching, communicable.
    • infectious Contaminating, poisoning, defiling.
    • ***
Chambers's Twentieth Century Dictionary
    • adjs Infectious having the quality of infecting: corrupting: apt to spread
    • ***


  • Napoleon Bonaparte
    “The infectiousness of crime is like that of the plague.”
  • Norman Vincent Peale
    “Your enthusiasm will be infectious, stimulating and attractive to others. They will love you for it. They will go for you and with you.”


Webster's Revised Unabridged Dictionary
Cf. F. infectieux,
Chambers's Twentieth Century Dictionary
Fr.,—L. inficĕre, infectumin, into facĕre, to make.


In literature:

The Games Captain's enthusiasm was infectious.
"The Luckiest Girl in the School" by Angela Brazil
The disease was most infectious.
"Five Years in New Zealand" by Robert B. Booth
Rubens was a positive leader; so animated was his manner that his ambition was infectious.
"Little Journeys to the Homes of the Great, Volume 4 (of 14)" by Elbert Hubbard
His mischievous spirit is infectious.
"Lady Rosamond's Secret" by Rebecca Agatha Armour
Imagination is sometimes very infectious.
"Animal Ghosts" by Elliott O'Donnell
All exhibitions of emotion are infectious.
"History of English Humour, Vol. 1 (of 2)" by Alfred Guy Kingan L'Estrange
The duration of infectiousness may be longer, although it is not the rule.
"The Third Great Plague" by John H. Stokes
She should take every precaution against exposure to contagious or infectious diseases.
"The People's Common Sense Medical Adviser in Plain English" by R. V. Pierce
As I approached the door of which I was in search, a vapour, infectious and deadly, assailed my senses.
"Arthur Mervyn" by Charles Brockden Brown
As a result, smallpox has become one of the rarest, instead of the commonest, of our infectious diseases.
"The Child's Day" by Woods Hutchinson

In poetry:

Lend then to me, Omnipotence! thine ear,
And save from the simplest of thy servants, here —
Save me, for thou to save canst never fail,
From the assaults of each infectious ail.
"A Prayer For A Clergyman, When He Goes To Visit The Sick, Or In The Time Of A Plague" by Rees Prichard
Against a castle moated gloomily by a bitter drain of blood,
From whose fetid wave contumely
Of all truth was reeking fumily
And infectiously, I stood;
Waiting for her sign--
A shriek repeated nine.
"Written In Hell" by Cale Young Rice
'TWAS so ; I saw thy birth. That drowsy lake
From her faint bosom breath'd thee, the disease
Of her sick waters and infectious ease.
But now at even,
Too gross for heaven,
Thou fall'st in tears, and weep'st for thy mistake.
"The Shower (I)" by Henry Vaughan

In news:

The Lancet Infectious Diseases, Volume 12, Issue 11, Pages 859 - 870, November 2012.
The contribution of infectious diseases to these adverse outcomes is uncertain.
The Lancet Infectious Diseases, Volume 12, Issue 10, Pages 742 - 743, October 2012.
In The Lancet Infectious Diseases, Talia Malagón and colleagues.
The Lancet Infectious Diseases, Volume 11, Issue 11, Pages 802 - 803, November 2011.
CHAMPAIGN — Three cats from two households in Savoy have tested positive for tularemia, or " rabbit fever ," an infectious disease that has been relatively rare in Illinois.
Parotitis, infectious (mumps) 0 0 0.
The Lancet Infectious Diseases, Volume 12, Issue 8, Pages 581 - 582, August 2012.
Your terrific energy puts you in a great mood -- and one that's at least a little infectious.
The Lancet Infectious Diseases, Volume 10, Issue 10, Pages 733 - 736, October 2010.
The Lancet Infectious Diseases, Volume 12, Issue 12, Pages 898 - 899, December 2012.
In The Lancet Infectious Diseases, Mitchell M Levy and colleagues.
The Lancet Infectious Diseases, Volume 12, Issue 10, Pages 751 - 752, October 2012.
The Lancet Infectious Diseases, Volume 12, Issue 2, Page 89, February 2012.
Shigellosis is an infectious bacterial disease caused by Shigella bacteria.

In science:

Morris, M., Data driven network models for the spread of infectious disease, in D.
The structure and function of complex networks
Resampling, permutation, hypothesis test, infectious disease, transmission, likelihood ratio, MLE.
A resampling-based test to detect person-to-person transmission of infectious disease
Is the infectious agent spreading from person to person? and 2.
A resampling-based test to detect person-to-person transmission of infectious disease
The basic reproductive number, R0 , is the fundamental measure of the transmissibility of an emerging infectious agent.
A resampling-based test to detect person-to-person transmission of infectious disease
Given that the emerging infectious agent is transmissible, estimates of R0 will generally be small and are not very informative.
A resampling-based test to detect person-to-person transmission of infectious disease