Zoonoses are called diseases that are transmitted between animals and humans. When this occurs, it is actually a mutation that happened between viruses and bacteria that originated in animals. In this way, many diseases that were specific to some species also reached humans. In these cases, transmission occurs mainly when there is a common source of water between the species, or also through contaminated food and soil.
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Diseases that have been transmitted from animals to humans
- H1N1
It is not for nothing that, when transmission of H1N1 began between humans, it was called “swine flu”. That's because this deadly virus originates from herds of pigs. In humans, the disease presented with symptoms such as fever, cough and sore throat.
- Black Plague
Another disease that really turned the world upside down through a worldwide epidemic was the Black Death. This disease, caused by the bacteria Yersinia pestis, passed to humans through rats and cats that had contact with infected fleas. Among the symptoms were intense fever, chills and body weakness.
- Anger
Very common among countries in Africa and Asia, rabies is a disease that still kills many people every year. In this case, the disease originated in animals such as cats and dogs that had contact with the Lyssavirus virus. Thus, transmission of the virus occurs through the saliva of infected animals. The disease can cause symptoms such as excess saliva, headache, mental confusion and fever.
- ebola
This virus, which caused a catastrophic epidemic, mainly in African countries, is also contagious through infected animals. Chimpanzees, bats and gorillas were some of the animals through which the disease reached humans.
- HIV
Before reaching humans, HIV first emerged in a community of chimpanzees. Therefore, the scientific community points out that the consumption of meat from these animals caused the first infections in humans in the fourteenth century. However, currently transmission occurs through unprotected sexual intercourse, in addition to contamination by direct contact with blood with the virus.