scholarly journals Lack of Middle East Respiratory Syndrome Coronavirus Transmission in Rabbits

Viruses ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 381 ◽  
Author(s):  
W. Widagdo ◽  
Nisreen M. A. Okba ◽  
Mathilde Richard ◽  
Dennis de Meulder ◽  
Theo M. Bestebroer ◽  
...  
Keyword(s):  
Middle East ◽  
Animal Species ◽  
Infectious Virus ◽  
Clinical Manifestations ◽  
Middle East Respiratory Syndrome ◽  
Viral Rna ◽  
Nasal Discharge ◽  
Upper Respiratory Tract ◽  
Transmission Potential ◽  
Livestock Animal

Middle East respiratory syndrome coronavirus (MERS-CoV) transmission from dromedaries to humans has resulted in major outbreaks in the Middle East. Although some other livestock animal species have been shown to be susceptible to MERS-CoV, it is not fully understood why the spread of the virus in these animal species has not been observed in the field. In this study, we used rabbits to further characterize the transmission potential of MERS-CoV. In line with the presence of MERS-CoV receptor in the rabbit nasal epithelium, high levels of viral RNA were shed from the nose following virus inoculation. However, unlike MERS-CoV-infected dromedaries, these rabbits did not develop clinical manifestations including nasal discharge and did shed only limited amounts of infectious virus from the nose. Consistently, no transmission by contact or airborne routes was observed in rabbits. Our data indicate that despite relatively high viral RNA levels produced, low levels of infectious virus are excreted in the upper respiratory tract of rabbits as compared to dromedary camels, thus resulting in a lack of viral transmission.

scholarly journals Asymptomatic Middle East Respiratory Syndrome Coronavirus Infection in Rabbits

2015 ◽  
Vol 89 (11) ◽  
pp. 6131-6135 ◽  
Author(s):  
Bart L. Haagmans ◽  
Judith M. A. van den Brand ◽  
Lisette B. Provacia ◽  
V. Stalin Raj ◽  
Koert J. Stittelaar ◽  
...  
Keyword(s):  
Middle East ◽  
Animal Species ◽  
Infectious Virus ◽  
Clinical Symptoms ◽  
Small Animal ◽  
Middle East Respiratory Syndrome ◽  
Upper Respiratory Tract ◽  
Histopathological Changes ◽  
Coronavirus Infection ◽  
Upper Respiratory

The ability of Middle East respiratory syndrome coronavirus (MERS-CoV) to infect small animal species may be restricted given the fact that mice, ferrets, and hamsters were shown to resist MERS-CoV infection. We inoculated rabbits with MERS-CoV. Although virus was detected in the lungs, neither significant histopathological changes nor clinical symptoms were observed. Infectious virus, however, was excreted from the upper respiratory tract, indicating a potential route of MERS-CoV transmission in some animal species.

Coronaviruses: HCoV, SARS-CoV, MERS-CoV, and COVID-19

2020 ◽  
Author(s):  
Michael G. Ison
Keyword(s):  
Middle East ◽  
Middle East Respiratory Syndrome ◽  
World Health ◽  
Upper Respiratory Tract ◽  
Viral Pathogens ◽  
Control And Prevention ◽  
The Common ◽  
Upper Respiratory ◽  
Polymerase Chain ◽  
Health Organization

Coronaviruses (CoVs) are a group of viral pathogens that infect mammals and birds. The presentation in humans is typically that of a mild upper respiratory tract infection, similar to the common cold. However, in recent years, dramatic attention has arisen for more lethal members of this viral family (e.g., severe acute respiratory syndrome [SARS-CoV], Middle East respiratory syndrome [MERS-CoV], and coronavirus disease 2019 [COVID-19]). The epidemiology, clinical presentation, diagnosis, and management of these viruses are discussed in this review. Importantly, new guideline tables from the Centers for Disease Control and Prevention, as well as the World Health Organization are provided at the conclusion of the review. This review contains 12 tables, 3 figure and 48 references. Keywords: Coronavirus, severe acute respiratory distress syndrome (SARS), Middle East respiratory syndrome (MERS), COVID-19, respiratory infection, antiviral, real-time polymerase chain reaction

Coronaviruses: HCoV, SARS-CoV, MERS-CoV, and COVID-19

2020 ◽  
Author(s):  
Michael G. Ison
Keyword(s):  
Middle East ◽  
Middle East Respiratory Syndrome ◽  
World Health ◽  
Upper Respiratory Tract ◽  
Viral Pathogens ◽  
Control And Prevention ◽  
The Common ◽  
Upper Respiratory ◽  
Polymerase Chain ◽  
Health Organization

Coronaviruses (CoVs) are a group of viral pathogens that infect mammals and birds. The presentation in humans is typically that of a mild upper respiratory tract infection, similar to the common cold. However, in recent years, dramatic attention has arisen for more lethal members of this viral family (e.g., severe acute respiratory syndrome [SARS-CoV], Middle East respiratory syndrome [MERS-CoV], and coronavirus disease 2019 [COVID-19]). The epidemiology, clinical presentation, diagnosis, and management of these viruses are discussed in this review. Importantly, new guideline tables from the Centers for Disease Control and Prevention, as well as the World Health Organization are provided at the conclusion of the review. This review contains 12 tables, 3 figure and 48 references. Keywords: Coronavirus, severe acute respiratory distress syndrome (SARS), Middle East respiratory syndrome (MERS), COVID-19, respiratory infection, antiviral, real-time polymerase chain reaction

Coronaviruses: HCoV, SARS-CoV, MERS-CoV, and COVID-19

2020 ◽  
Author(s):  
Michael G. Ison
Keyword(s):  
Middle East ◽  
Middle East Respiratory Syndrome ◽  
World Health ◽  
Upper Respiratory Tract ◽  
Viral Pathogens ◽  
Control And Prevention ◽  
The Common ◽  
Upper Respiratory ◽  
Polymerase Chain ◽  
Health Organization

Coronaviruses (CoVs) are a group of viral pathogens that infect mammals and birds. The presentation in humans is typically that of a mild upper respiratory tract infection, similar to the common cold. However, in recent years, dramatic attention has arisen for more lethal members of this viral family (e.g., severe acute respiratory syndrome [SARS-CoV], Middle East respiratory syndrome [MERS-CoV], and coronavirus disease 2019 [COVID-19]). The epidemiology, clinical presentation, diagnosis, and management of these viruses are discussed in this review. Importantly, new guideline tables from the Centers for Disease Control and Prevention, as well as the World Health Organization are provided at the conclusion of the review. This review contains 12 tables, 3 figure and 48 references. Keywords: Coronavirus, severe acute respiratory distress syndrome (SARS), Middle East respiratory syndrome (MERS), COVID-19, respiratory infection, antiviral, real-time polymerase chain reaction

Coronaviruses: HCoV, SARS-CoV, MERS-CoV, and COVID-19

2020 ◽  
Author(s):  
Michael G. Ison
Keyword(s):  
Middle East ◽  
Middle East Respiratory Syndrome ◽  
World Health ◽  
Upper Respiratory Tract ◽  
Viral Pathogens ◽  
Control And Prevention ◽  
The Common ◽  
Upper Respiratory ◽  
Polymerase Chain ◽  
Health Organization

Coronaviruses (CoVs) are a group of viral pathogens that infect mammals and birds. The presentation in humans is typically that of a mild upper respiratory tract infection, similar to the common cold. However, in recent years, dramatic attention has arisen for more lethal members of this viral family (e.g., severe acute respiratory syndrome [SARS-CoV], Middle East respiratory syndrome [MERS-CoV], and coronavirus disease 2019 [COVID-19]). The epidemiology, clinical presentation, diagnosis, and management of these viruses are discussed in this review. Importantly, new guideline tables from the Centers for Disease Control and Prevention, as well as the World Health Organization are provided at the conclusion of the review. This review contains 12 tables, 3 figure and 48 references. Keywords: Coronavirus, severe acute respiratory distress syndrome (SARS), Middle East respiratory syndrome (MERS), COVID-19, respiratory infection, antiviral, real-time polymerase chain reaction

Coronaviruses: HCoV, SARS-CoV, MERS-CoV, and COVID-19

2020 ◽  
Author(s):  
Michael G. Ison
Keyword(s):  
Middle East ◽  
Middle East Respiratory Syndrome ◽  
World Health ◽  
Upper Respiratory Tract ◽  
Viral Pathogens ◽  
Control And Prevention ◽  
The Common ◽  
Upper Respiratory ◽  
Polymerase Chain ◽  
Health Organization

Coronaviruses (CoVs) are a group of viral pathogens that infect mammals and birds. The presentation in humans is typically that of a mild upper respiratory tract infection, similar to the common cold. However, in recent years, dramatic attention has arisen for more lethal members of this viral family (e.g., severe acute respiratory syndrome [SARS-CoV], Middle East respiratory syndrome [MERS-CoV], and coronavirus disease 2019 [COVID-19]). The epidemiology, clinical presentation, diagnosis, and management of these viruses are discussed in this review. Importantly, new guideline tables from the Centers for Disease Control and Prevention, as well as the World Health Organization are provided at the conclusion of the review. This review contains 12 tables, 3 figure and 48 references. Keywords: Coronavirus, severe acute respiratory distress syndrome (SARS), Middle East respiratory syndrome (MERS), COVID-19, respiratory infection, antiviral, real-time polymerase chain reaction

scholarly journals A transient increase in MHC-IIlow monocytes after experimental infection with Avibacterium paragallinarum (serovar B-1) in SPF chickens

2020 ◽  
Vol 51 (1) ◽  
Author(s):  
Karla Lucía F. Alvarez ◽  
Astrid Poma-Acevedo ◽  
Manolo Fernández-Díaz
Keyword(s):  
Immune Response ◽  
Large Body ◽  
Clinical Signs ◽  
Clinical Manifestations ◽  
Nasal Discharge ◽  
High Morbidity ◽  
Upper Respiratory Tract ◽  
Secondary Infections ◽  
Avibacterium Paragallinarum ◽  
Facial Swelling

Abstract Infectious coryza (IC), an upper respiratory tract disease affecting chickens, is caused by Avibacterium paragallinarum. The clinical manifestations of IC include nasal discharge, facial swelling, and lacrimation. This acute disease results in high morbidity and low mortality, while the course of the disease is prolonged and mortality rates are increased in cases with secondary infections. Studies regarding the immune response in infected chickens are scarce, and the local immune response is the focal point of investigation. However, a large body of work has demonstrated that severe infections can impact the systemic immune response. The objective of this study was to evaluate the systemic effects of Avibacterium paragallinarum (serovar B-1) infection on immune cells in specific pathogen-free (SPF) chickens. The current study revealed the presence of a transient circulating monocyte population endowed with high phagocytic ability and clear downregulation of major histocompatibility complex class II (MHC-II) surface expression. In human and mouse studies, this monocyte population (identified as tolerant monocytes) has been correlated with a dysfunctional immune response, increasing the risk of secondary infections and mortality. Consistent with this dysfunctional immune response, we demonstrate that B cells from infected chickens produced fewer antibodies than those from control chickens. Moreover, T cells isolated from the peripheral blood of infected chickens had a lower ability to proliferate in response to concanavalin A than those isolated from control chickens. These findings could be related to the severe clinical signs observed in complicated IC caused by the presence of secondary infections.

scholarly journals Middle East respiratory syndrome coronavirus (MERS-CoV) RNA and neutralising antibodies in milk collected according to local customs from dromedary camels, Qatar, April 2014

2014 ◽  
Vol 19 (23) ◽  
Author(s):  
C B Reusken ◽  
E A Farag ◽  
M Jonges ◽  
G J Godeke ◽  
A M El-Sayed ◽  
...  
Keyword(s):  
Middle East ◽  
Middle East Respiratory Syndrome ◽  
Viral Rna ◽  
Dromedary Camels ◽  
Neutralising Antibodies ◽  
Virus Shedding ◽  
Active Virus ◽  
Food Borne ◽  
Nasal Secretions

Antibodies to Middle East respiratory syndrome coronavirus (MERS-CoV) were detected in serum and milk collected according to local customs from 33 camels in Qatar, April 2014. At one location, evidence for active virus shedding in nasal secretions and/or faeces was observed for 7/12 camels; viral RNA was detected in milk of five of these seven camels. The presence of MERS-CoV RNA in milk of camels actively shedding the virus warrants measures to prevent putative food-borne transmission of MERS-CoV.

scholarly journals Engineering a Replication-Competent, Propagation-Defective Middle East Respiratory Syndrome Coronavirus as a Vaccine Candidate

mBio ◽  
2013 ◽  
Vol 4 (5) ◽  
Author(s):  
Fernando Almazán ◽  
Marta L. DeDiego ◽  
Isabel Sola ◽  
Sonia Zuñiga ◽  
Jose L. Nieto-Torres ◽  
...  
Keyword(s):  
Middle East ◽  
Mortality Rate ◽  
Bacterial Artificial Chromosome ◽  
Cdna Clone ◽  
Reverse Genetics ◽  
Infectious Virus ◽  
Vaccine Candidate ◽  
Artificial Chromosome ◽  
Middle East Respiratory Syndrome ◽  
E Protein

ABSTRACTMiddle East respiratory syndrome coronavirus (MERS-CoV) is an emerging coronavirus infecting humans that is associated with acute pneumonia, occasional renal failure, and a high mortality rate and is considered a threat to public health. The construction of a full-length infectious cDNA clone of the MERS-CoV genome in a bacterial artificial chromosome is reported here, providing a reverse genetics system to study the molecular biology of the virus and to develop attenuated viruses as vaccine candidates. Following transfection with the cDNA clone, infectious virus was rescued in both Vero A66 and Huh-7 cells. Recombinant MERS-CoVs (rMERS-CoVs) lacking the accessory genes 3, 4a, 4b, and 5 were successfully rescued from cDNA clones with these genes deleted. The mutant viruses presented growth kinetics similar to those of the wild-type virus, indicating that accessory genes were not essential for MERS-CoV replication in cell cultures. In contrast, an engineered mutant virus lacking the structural E protein (rMERS-CoV-ΔE) was not successfully rescued, since viral infectivity was lost at early passages. Interestingly, the rMERS-CoV-ΔE genome replicated after cDNA clone was transfected into cells. The infectious virus was rescued and propagated in cells expressing the E protein intrans, indicating that this virus was replication competent and propagation defective. Therefore, the rMERS-CoV-ΔE mutant virus is potentially a safe and promising vaccine candidate to prevent MERS-CoV infection.IMPORTANCESince the emergence of MERS-CoV in the Arabian Peninsula during the summer of 2012, it has already spread to 10 different countries, infecting around 94 persons and showing a mortality rate higher than 50%. This article describes the development of the first reverse genetics system for MERS-CoV, based on the construction of an infectious cDNA clone inserted into a bacterial artificial chromosome. Using this system, a collection of rMERS-CoV deletion mutants has been generated. Interestingly, one of the mutants with the E gene deleted was a replication-competent, propagation-defective virus that could only be grown in the laboratory by providing E protein intrans, whereas it would only survive a single virus infection cyclein vivo. This virus constitutes a vaccine candidate that may represent a balance between safety and efficacy for the induction of mucosal immunity, which is needed to prevent MERS-CoV infection.

scholarly journals Infectious Middle East Respiratory Syndrome Coronavirus Excretion and Serotype Variability Based on Live Virus Isolates from Patients in Saudi Arabia

2015 ◽  
Vol 53 (9) ◽  
pp. 2951-2955 ◽  
Author(s):  
Doreen Muth ◽  
Victor M. Corman ◽  
Benjamin Meyer ◽  
Abdullah Assiri ◽  
Malak Al-Masri ◽  
...  
Keyword(s):  
Middle East ◽  
Infectious Virus ◽  
Virus Isolation ◽  
Vero Cells ◽  
Prototype Strain ◽  
Middle East Respiratory Syndrome ◽  
Serum Samples ◽  
Live Virus ◽  
Virus Isolates ◽  
Rna Concentration

The newly emerged Middle East respiratory syndrome coronavirus (MERS-CoV) has infected at least 1,082 people, including 439 fatalities. So far, no empirical virus isolation study has been done to elucidate infectious virus secretion or serotype variability. Here, we used 51 respiratory samples from 32 patients with confirmed MERS-CoV infection for virus isolation in Vero B4 and Caco-2 cells. We found Caco-2 cells to significantly enhance isolation success over routinely used Vero cells. Isolation success correlated with viral RNA concentration and time after diagnosis as well as with the amount of IgA antibodies secreted in respiratory samples used for isolation. Results from plaque reduction neutralization assays using a representative range of serum samples and virus isolates suggested that all circulating human MERS-CoV strains represent one single serotype. The choice of prototype strain is not likely to influence the success of candidate MERS-CoV vaccines. However, vaccine formulations should be evaluated for their potential to induce IgA.

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