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[2] [1] [3] [4] Major modern diseases such as Ebola and salmonellosis are zoonoses. HIV was a zoonotic disease transmitted to humans in the early part of the 20th century, though it has now evolved into a separate human-only disease. [5] [6] [7] Human infection with animal influenza viruses is rare, as they do not transmit easily to or among ...
Different viruses can infect all the organs and tissues of the body and the outcomes range from mild or no symptoms, to life-threatening diseases. [5] Humans cannot be infected by plant or insect viruses, but they are susceptible to infections with viruses from other vertebrates. These are called viral zoonoses or zoonotic infections. [6]
Cross-species transmission is the most significant cause of disease emergence in humans and other species. [citation needed] Wildlife zoonotic diseases of microbial origin are also the most common group of human emerging diseases, and CST between wildlife and livestock has appreciable economic impacts in agriculture by reducing livestock productivity and imposing export restrictions. [2]
Of those, 79% involved a virus going from one animal species to another animal species. ... humans give more viruses - about twice as many - to animals than they give to us. Of those, 79% involved ...
One main motivation for the study of viruses is because they cause many infectious diseases of plants and animals. [1] The study of the manner in which viruses cause disease is viral pathogenesis. The degree to which a virus causes disease is its virulence. [2] These fields of study are called plant virology, animal virology and human or ...
This category includes any viruses that can infect humans. Pages in this category should be moved to subcategories where applicable. This category may require frequent maintenance to avoid becoming too large.
How viruses do this depends mainly on the type of nucleic acid DNA or RNA they contain, which is either one or the other but never both. Viruses cannot function or reproduce outside a cell, and are totally dependent on a host cell to survive. Most viruses are species specific, and related viruses typically only infect a narrow range of plants ...
For instance, people with severe cases of viral pneumonia – caused by viruses like the flu, RSV or SARS-CoV-2 – also often end up with a bacterial infection in the lungs or sinuses.
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