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1.
Int J Mol Sci ; 22(19)2021 Sep 30.
Article in English | MEDLINE | ID: covidwho-1444232

ABSTRACT

Natural or experimental infection of domestic cats and virus transmission from humans to captive predatory cats suggest that felids are highly susceptible to SARS-CoV-2 infection. However, it is unclear which cells and compartments of the respiratory tract are infected. To address this question, primary cell cultures derived from the nose, trachea, and lungs of cat and lion were inoculated with SARS-CoV-2. Strong viral replication was observed for nasal mucosa explants and tracheal air-liquid interface cultures, whereas replication in lung slices was less efficient. Infection was mainly restricted to epithelial cells and did not cause major pathological changes. Detection of high ACE2 levels in the nose and trachea but not lung further suggests that susceptibility of feline tissues to SARS-CoV-2 correlates with ACE2 expression. Collectively, this study demonstrates that SARS-CoV-2 can efficiently replicate in the feline upper respiratory tract ex vivo and thus highlights the risk of SARS-CoV-2 spillover from humans to felids.


Subject(s)
COVID-19/veterinary , Cats/virology , Lions/virology , Angiotensin-Converting Enzyme 2/analysis , Animals , COVID-19/transmission , COVID-19/virology , Cat Diseases/transmission , Cat Diseases/virology , Cells, Cultured , Disease Susceptibility , Humans , Lung/cytology , Lung/virology , Nose/cytology , Nose/virology , SARS-CoV-2/isolation & purification , Trachea/cytology , Trachea/virology
2.
J Zoo Wildl Med ; 51(4): 733-744, 2021 Jan.
Article in English | MEDLINE | ID: covidwho-1041161

ABSTRACT

Severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) emerged as the cause of a global pandemic in 2019-2020. In March 2020, New York City became the epicenter in the United States for the pandemic. On 27 March 2020, a Malayan tiger (Panthera tigris jacksoni) at the Bronx Zoo in New York City developed a cough and wheezing with subsequent inappetence. Over the next week, an additional Malayan tiger and two Amur tigers (Panthera tigris altaica) in the same building and three lions (Panthera leo krugeri) in a separate building also became ill. The index case was anesthetized for diagnostic workup. Physical examination and bloodwork results were unremarkable. Thoracic radiography and ultrasonography revealed a bronchial pattern with peribronchial cuffing and mild lung consolidation with alveolar-interstitial syndrome, respectively. SARS-CoV-2 RNA was identified by real-time, reverse transcriptase PCR (rRT-PCR) on oropharyngeal and nasal swabs and tracheal wash fluid. Cytologic examination of tracheal wash fluid revealed necrosis, and viral RNA was detected in necrotic cells by in situ hybridization, confirming virus-associated tissue damage. SARS-CoV-2 was isolated from the tracheal wash fluid of the index case, as well as the feces from one Amur tiger and one lion. Fecal viral RNA shedding was confirmed in all seven clinical cases and an asymptomatic Amur tiger. Respiratory signs abated within 1-5 days for most animals, although they persisted intermittently for 16 days in the index case. Fecal RNA shedding persisted for as long as 35 days beyond cessation of respiratory signs. This case series describes the clinical presentation, diagnostic evaluation, and management of tigers and lions infected with SARS-CoV-2 and describes the duration of viral RNA fecal shedding in these cases. This report documents the first known natural transmission of SARS-CoV-2 from humans to nondomestic felids.


Subject(s)
COVID-19/veterinary , Feces/virology , Lions/virology , SARS-CoV-2 , Tigers/virology , Animals , Animals, Zoo , Bacterial Proteins/genetics , Bacterial Proteins/isolation & purification , COVID-19/diagnosis , COVID-19/epidemiology , COVID-19/transmission , DNA-Binding Proteins/genetics , DNA-Binding Proteins/isolation & purification , New York City/epidemiology , Transcription Factors/genetics , Transcription Factors/isolation & purification
3.
Open Vet J ; 10(2): 164-177, 2020 08.
Article in English | MEDLINE | ID: covidwho-724486

ABSTRACT

Viruses are having great time as they seem to have bogged humans down. Severe acute respiratory syndrome (SARS), Middle East respiratory syndrome (MERS), and novel coronavirus (COVID-19) are the three major coronaviruses of present-day global human and animal health concern. COVID-19 caused by SARS-CoV-2 is identified as the newest disease, presumably of bat origin. Different theories on the evolution of viruses are in circulation, yet there is no denying the fact that the animal source is the skeleton. The whole world is witnessing the terror of the COVID-19 pandemic that is following the same path of SARS and MERS, and seems to be more severe. In addition to humans, several species of animals are reported to have been infected with these life-threatening viruses. The possible routes of transmission and their zoonotic potentialities are the subjects of intense research. This review article aims to overview the link of all these three deadly coronaviruses among animals along with their phylogenic evolution and cross-species transmission. This is essential since animals as pets or food are said to pose some risk, and their better understanding is a must in order to prepare a possible plan for future havoc in both human and animal health. Although COVID-19 is causing a human health hazard globally, its reporting in animals are limited compared to SARS and MERS. Non-human primates and carnivores are most susceptible to SARS-coronavirus and SARS-CoV-2, respectively, whereas the dromedary camel is susceptible to MERS-coronavirus. Phylogenetically, the trio viruses are reported to have originated from bats and have special capacity to undergo mutation and genomic recombination in order to infect humans through its reservoir or replication host. However, it is difficult to analyze how the genomic pattern of coronaviruses occurs. Thus, increased possibility of new virus-variants infecting humans and animals in the upcoming days seems to be the biggest challenge for the future of the world. One health approach is portrayed as our best way ahead, and understanding the animal dimension will go a long way in formulating such preparedness plans.


Subject(s)
Betacoronavirus/classification , Coronavirus Infections/veterinary , Middle East Respiratory Syndrome Coronavirus/classification , Pandemics/veterinary , Pneumonia, Viral/veterinary , SARS Virus/classification , Severe Acute Respiratory Syndrome/veterinary , Animals , Animals, Wild , Betacoronavirus/genetics , COVID-19 , Camelids, New World/virology , Camelus/virology , Cats , Chiroptera/virology , Coronavirus Infections/immunology , Coronavirus Infections/transmission , Disease Susceptibility/veterinary , Dogs , Eutheria/virology , Ferrets/virology , Humans , Lions/virology , Middle East Respiratory Syndrome Coronavirus/genetics , Phylogeny , Pneumonia, Viral/immunology , Pneumonia, Viral/transmission , Primates/virology , Raccoon Dogs/virology , SARS Virus/genetics , SARS-CoV-2 , Severe Acute Respiratory Syndrome/immunology , Severe Acute Respiratory Syndrome/transmission , Snakes/virology , Tigers/virology , Viverridae/virology
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