infectious disease

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caused by or capable of being communicated by infection.
infectious disease one due to organisms ranging in size from viruses to parasitic worms; it may be contagious in origin, result from nosocomial organisms, or be due to endogenous microflora from the nose and throat, skin, or bowel. See also communicable disease.

An emerging infectious disease is one that is endemic in a given population but that has begun increasing in frequency or developing resistance to drug therapy or other treatments.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

in·fec·tious dis·ease

, infective disease
a disease resulting from the presence and activity of a microbial agent.
Farlex Partner Medical Dictionary © Farlex 2012

infectious disease

See Infection.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

in·fec·tious dis·ease

, infective disease (in-fek'shŭs di-zēz', in-fek'tiv)
A disease resulting from the presence and activity of a microbial agent.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

in·fec·tious dis·ease

, infective disease (in-fek'shŭs di-zēz', in-fek'tiv)
Disease resulting from the presence and activity of a microbial agent.
Medical Dictionary for the Dental Professions © Farlex 2012

Patient discussion about infectious disease

Q. Is psoriasis infectious? Last week I and my friends from high-school went to the pool. One of my friend has psoriasis on his back, and when the lifeguard noticed it he asked him to leave the pool because he has skin disease that may spread to the other people swimming in the pool. We told him it is psoriasis and not some fungus, but he told us that psoriasis is also infectious. Is that true? Can psoriasis infect people who come in touch with people with psoriasis? Can I go swimming with him or should be more cautious?

A. It is right that psoriasis is not a contagious skin condition. But your friend should take care. However keeping skin humid is better for Psoriasis patients as I recently read these tips at

Q. Is leukemia contagious? A friend of mine got leukemia (blood cancer), can I get it from him if he bleeds and I touch the blood? Like HIV I mean.

A. No, you don't have to be afraid, no chance of that. Your friend will need you to pass this terrible illness. So I recommend learning a bit about leukemia so you understand it better and won't avoid your friend.
You can get information on those 2 sites:

Q. Is psoriasis contagious? My wife got psoriasis and I don’t want to get infected…

A. Psoriasis itself, as was written above, isn't contagious, i.e. if someone has psoriasis he or she can't transmit it to you. However, there is a form of psoriasis called psoriasis guttate that is associated with infection of the throat by a bacterium called streptococcus (which is contagious), so in some way it is contagious.

You may read more here:

More discussions about infectious disease
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References in periodicals archive ?
A study evaluated the care of patients with AIDS in Brazil, emphasizing the heterogeneity of health care assistance and infrastructure, even though there are medication availability, clinical follow up exams, as well as infectology specialized physician in most services (44).
Personnel in the Laboratory of Molecular Infectology at the UANL were informed of the patient and were provided with the remainder of the second CSF specimen several days before his death.
The eligibility criteria were: 18 years of age or older, of both sexes, and outpatients receiving care at the Emilio Ribas Institute of Infectology, and aware of their diagnosis.
* Charite Medical School, Berlin, Germany; ([dagger]) University of Tubingen, Tubingen, Germany; ([double dagger]) University of Ulm, Ulm, Germany; ([section]) University of Frankfurt, Frankfurt, Germany; ([paragraph]) Institute for Novel and Emerging Infectious Diseases, Riems/Greifswald, Germany; # University Essen, Essen, Germany; and ** institute of Virology, Infectology and Epidemiology, Stuttgart, Germany
In any case, through the analysis of the lists of members and interview information, we can conclude that the experts are individuals with training and/or technical-scientific experience in infectology that qualifies them as experts.
* Corresponding author at: Federal University of Bahia, Infectology, Largo do Terreiro de Jesus, Praca XV de novembro, s/n, Salvador, Bahia 40025010, Brazil.
On September 6, 2003, a 46-year-old physician sought care from the Department of Infectology, ("Baranya County Hospital" Pecs, Hungary); he reported a 4-day history of fever, headache, malaise, maculopapular rash, and pharyngitis.