To the man with cat rides the ambulance

Vomiting, shortness of breath, and diarrhea are symptoms of Belgian cats who appeared one week after its owner learned about their positive SARS-CoV-2 status. Tests showedthat in the vomit and feces of an animal contains the genome of the novel coronavirus. Given that the Hong Kong government reported about Pomeranian Spitz and German shepherd with positive test results, and in the U.S. confirmed case of transmission of the virus from human to animal (not lucky tiger at new York zoo) — the owners of four-legged Pets, to put it mildly, strained.

“Who are analyzing the data that cats — including tigers — and ferrets can be infected with a coronavirus from a man, and dogs, with high probability, impervious, — Professor, research Institute of epidemiology and Microbiology. N. Gamalei Alexander Sanin. Only the family of coronaviruses includes about 40 species. From cats, dogs and ferrets, as in other animals, such as bats, pigs and cattle “self” coronaviruses that affect them. A cat infected with the human coronavirus, most likely, not get sick, although minor symptoms are: coughing or sneezing, upset stomach may occur”.

Test for the presence of the genome of SARS-CoV-2 in the vomit or stool still does not show whether the virus really infect the animal (that is, to enter the cells and begin to reproduce) — it shows that viral particles in the cat just got. To better understand the capabilities of the novel coronavirus continue to overcome cross-species barriers, scientists from Harbin in the lab had infected them cats, dogs, ferrets, pigs, chickens and ducks. Experimental through the nose introduced a large number of the pathogen, which in real life they are unlikely to be encountered. In the end, chickens, ducks and pigs showed the presence of the virus, two dogs from five pathogens found in the feces, but the cat particles got into the tissue above the upper respiratory tract and lungs. Moreover, infected animals managed by scientists — not showing symptoms of the disease — to infect one of the three healthy cats who were housed in adjacent cell. In the scientific community to this attitude is ambiguous: the sample is small, the dose of a pathogen is too large for real-world situations (introduced 105 blackbrush units of SARS-CoV-2 per milliliter; and although the minimum “dose” of infection we don’t know yet, for the development of the first SARS had from 67 to 540 FIGHT/ml). In addition, the conditions of cats in the article is not particularly specified, so the path of transmission is also unclear.

In General, the path “from animals to the people” among the diseases popular: 60 percent of new infectious diseases that people received over the past half century, has come to us that way — including all the same new coronavirus. Infection inherited by Homo Sapiens from other animals are called zooanthroponosis or just zoonoses. They are afraid of a doting mother, forbidding the children to touch stray cats — vector helminths, Toxoplasma, fungi trihofitonom, Salmonella, chlamydia and rabies virus. Sources of zoonoses be 11.4 percent of all species of terrestrial mammals — mostly rodents, bats, primates, artiodactyls and carnivores.

As for the reverse scenario, in 2014, the journal PLOS ONE has published an overview of scientific articles on reverse zoonosesover the last 30 years they were registered in 56 countries on all continents except Antarctica. The report 21 the publication was devoted to the successful transfer of bacteria, 16 viruses, 12 — parasites 7 — fungi, and the rest to other pathogens or complex cases of infection.

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