The likelihood of Contracting any virus from a specific mammal or bird does not depend on environmental characteristics and systematic position of the animal, reported in the Proceedings of the National Academy of Sciences. According to the authors, the number of different viruses that affect a group of vertebrates, and with it the man, depends on how many in this group, and no matter how close relatives they have person or what kind of lifestyle they lead.
The animal virus can infect people and cause them zooanthroponosis. You can often hear that the main carriers of diseases of this kind, rodents and bats, that they constitute a natural reservoir of a particular infection. Argue that a number of rodents live near the dwellings of man and he uses his resources, and the immune system of bats works sothat contributes to infection of bats with viruses that will suit the person (and often these viruses in the body of bats did not manifest itself).
However, there is an alternative hypothesis, which States that representatives of each species affects more or less the same number of viruses, and the probability of transition of different viruses to humans about the same. She explains why most rodents are dangerous to humans viruses than, say, an odd-toed ungulate: more than 2000 rodent species, and equids — only about 20. If this hypothesis is correct, it is not necessary to identify the natural reservoirs of zooanthroponosis and is worth exploring viruses of different groups of animals.
Employees of the University of Glasgow Nardus of Mollentze (Nardus Mollentzea) and Daniel Straker (Daniel G. Streicker) checked out the specified hypothesis, collecting data for 415 species of DNA – and RNA-viruses eight groups of mammals and three groups of birds. The researchers determined which of these viruses can be transmitted to humans, took into account the degree of kinship of animals with man, the phylogenetic relationship between viruses and the number of publications on each zooantroponoses. Next, they used logistic regressionto establish which factors affect the probability a person is infected with a virus from a particular vertebrate.