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Zoonosis. A zoonosis ( / zoʊˈɒnəsɪs, ˌzoʊəˈnoʊsɪs / ⓘ; [ 1] plural zoonoses) or zoonotic disease is an infectious disease of humans caused by a pathogen (an infectious agent, such as a bacterium, virus, parasite, or prion) that can jump from a non-human (usually a vertebrate) to a human and vice versa. [ 1][ 2][ 3] Major modern ...
2,700 (2015) [4] Ascariasis is a disease caused by the parasitic roundworm Ascaris lumbricoides. [1] Infections have no symptoms in more than 85% of cases, especially if the number of worms is small. [1] Symptoms increase with the number of worms present and may include shortness of breath and fever in the beginning of the disease. [1]
Rinderpest was mainly transmitted by direct contact and by drinking contaminated water, although it could also be transmitted by air. [4] Rinderpest is believed to have originated in Asia, and to have spread by transport of cattle. [5] [6] [7] The term Rinderpest (German: [ˈʁɪndɐˌpɛst] ⓘ) is a German word meaning "cattle plague".
Chickenpox. Chickenpox, also known as varicella ( / ˌvɛrəˈsɛlə / VER-ə-SEL-ə ), is a highly contagious, vaccine-preventable disease caused by the initial infection with varicella zoster virus (VZV), a member of the herpesvirus family. [ 3][ 7][ 5] The disease results in a characteristic skin rash that forms small, itchy blisters, which ...
An infectious disease agent can be transmitted in two ways: as horizontal disease agent transmission from one individual to another in the same generation (peers in the same age group) [3] by either direct contact (licking, touching, biting), or indirect contact through air – cough or sneeze (vectors or fomites that allow the transmission of the agent causing the disease without physical ...
Orf is a zoonotic disease, meaning humans can contract this disorder through direct contact with infected sheep and goats or with fomites carrying the orf virus. [6] It causes a purulent-appearing papule locally and generally no systemic symptoms.
Plague (disease) Yersinia pestis seen at 200× magnification with a fluorescent label. Plague is an infectious disease caused by the bacterium Yersinia pestis. [ 2] Symptoms include fever, weakness and headache. [ 1] Usually this begins one to seven days after exposure. [ 2] There are three forms of plague, each affecting a different part of ...
A contagious disease is an infectious disease that is readily spread (that is, communicated) by transmission of a pathogen through contact (direct or indirect) with an infected person. [ 1] A disease is often known to be contagious before medical science discovers its causative agent. Koch's postulates, which were published at the end of the ...