scholarly journals Efficacy of the Canine Influenza Virus H3N8 Vaccine To Decrease Severity of Clinical Disease after Cochallenge with Canine Influenza Virus and Streptococcus equi subsp. zooepidemicus

2011 ◽  
Vol 18 (4) ◽  
pp. 559-564 ◽  
Author(s):  
Laurie J. Larson ◽  
Jamie Henningson ◽  
Patricia Sharp ◽  
Bliss Thiel ◽  
Muralidhar S. Deshpande ◽  
...  
Keyword(s):  
Influenza Virus ◽  
Horizontal Transmission ◽  
Severity Of Illness ◽  
Respiratory Pathogens ◽  
Content Type ◽  
Canine Influenza Virus ◽  
The North ◽  
Streptococcus Equi ◽  
Canine Influenza ◽  
High Level

ABSTRACTSince first emerging in the North American canine population in 2004, canine influenza virus (CIV) subtype H3N8 has shown horizontal transmission among dogs, with a high level of adaptation to this species. The severity of disease is variable, and coinfection by other respiratory pathogens is an important factor in the degree of morbidity and mortality. The first influenza vaccine for dogs, an inactivated vaccine containing CIV subtype H3N8, was conditionally approved by the U.S. Department of Agriculture (USDA) for licensure in May 2009 and fully licensed in June 2010. This study evaluates the efficacy of this vaccine to reduce the severity of illness in dogs cochallenged with virulent CIV andStreptococcus equisubsp.zooepidemicus.

scholarly journals Canine Influenza Virus is Mildly Restricted by Canine Tetherin Protein

Viruses ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 565
Author(s):  
Yun Zheng ◽  
Xiangqi Hao ◽  
Qingxu Zheng ◽  
Xi Lin ◽  
Xin Zhang ◽  
...  
Keyword(s):  
Influenza Virus ◽  
Transmembrane Domain ◽  
Transmembrane Protein ◽  
Cellular Damage ◽  
Interferon Response ◽  
Type I ◽  
Canine Influenza Virus ◽  
Immune Factor ◽  
Canine Influenza ◽  
The Impact

Tetherin (BST2/CD317/HM1.24) has emerged as a key host-cell ·defence molecule that acts by inhibiting the release and spread of diverse enveloped virions from infected cells. We analysed the biological features of canine tetherin and found it to be an unstable hydrophilic type I transmembrane protein with one transmembrane domain, no signal peptide, and multiple glycosylation and phosphorylation sites. Furthermore, the tissue expression profile of canine tetherin revealed that it was particularly abundant in immune organs. The canine tetherin gene contains an interferon response element sequence that can be regulated and expressed by canine IFN-α. A CCK-8 assay showed that canine tetherin was effective in helping mitigate cellular damage caused by canine influenza virus (CIV) infection. Additionally, we found that the overexpression of canine tetherin inhibited replication of the CIV and that interference with the canine tetherin gene enhanced CIV replication in cells. The impact of canine tetherin on CIV replication was mild. However, these results elucidate the role of the innate immune factor, canine tetherin, during CIV infection for the first time.

scholarly journals In VitroSusceptibility of Canine Influenza A (H3N8) Virus to Nitazoxanide and Tizoxanide

2010 ◽  
Vol 2010 ◽  
pp. 1-5 ◽  
Author(s):  
Laura V. Ashton ◽  
Robert L. Callan ◽  
Sangeeta Rao ◽  
Gabriele A. Landolt
Keyword(s):  
Influenza Virus ◽  
Influenza A ◽  
The United States ◽  
Canine Influenza Virus ◽  
Valuable Adjunct ◽  
Canine Influenza ◽  
The Impact ◽  
H3n8 Virus

Infection of dogs with canine influenza virus (CIV) is considered widespread throughout the United States following the first isolation of CIV in 2004. While vaccination against influenza A infection is a common and important practice for disease control, antiviral therapy can serve as a valuable adjunct in controlling the impact of the disease. In this study, we examined the antiviral activity of nitazoxanide (NTZ) and tizoxanide (TIZ) against three CIV isolatesin vitro. NTZ and TIZ inhibited virus replication of all CIVs with 50% and 90% inhibitory concentrations ranging from 0.17 to 0.21 μMand from 0.60 to 0.76 μM, respectively. These results suggest that NTZ and TIZ are effective against CIV and may be useful for treatment of canine influenza in dogs but further investigation of thein vivoefficacy against CIV as well as the drug's potential for toxicity in dogs is needed.

scholarly journals Evolution of the hemagglutinin gene of H3N8 canine influenza virus in dogs

Virus Genes ◽  
2014 ◽  
Vol 49 (3) ◽  
pp. 393-399 ◽  
Author(s):  
Heidi L. Pecoraro ◽  
Susi Bennett ◽  
Miranda E. Spindel ◽  
Gabriele A. Landolt
Keyword(s):  
Influenza Virus ◽  
Canine Influenza Virus ◽  
Hemagglutinin Gene ◽  
Canine Influenza

scholarly journals Role of CARD Region of MDA5 Gene in Canine Influenza Virus Infection

Viruses ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 307 ◽  
Author(s):  
Cheng Fu ◽  
Shaotang Ye ◽  
Yongbo Liu ◽  
Shoujun Li
Keyword(s):  
Innate Immunity ◽  
Influenza Virus ◽  
Cytokine Production ◽  
Influenza Virus Infection ◽  
Luciferase Assay ◽  
Canine Influenza Virus ◽  
Card Domain ◽  
Canine Influenza ◽  
Receptor Family

MDA5 belongs to the RIG-I-like receptor family, which is involved in innate immunity. During viral infection, MDA5 generates an antiviral response by recognizing the ligand to activate interferon. However, the role and mechanism of MDA5 in canine influenza virus (CIV) infection are unclear. To understand the mechanism of canine MDA5-mediated innate immunity during CIV infection, we detected the distribution of MDA5 in beagles, and the structural prediction showed that MDA5 was mainly composed of a CARD domain, RD domain, and DExD/H helix structure. Moreover, we found that MDA5 inhibits CIV replication. Furthermore, in the dual luciferase assay, we revealed that the CARD region of MDA5 strongly activated the IFN-β promoter and mainly transmitted signals through the CARD region. Overexpression of the CARD region of MDA5 revealed that the MDA5-mediated signaling pathway could transmit signals by activating the IRF3/NF-κB and IRF3 promoters, promoting the expression of antiviral proteins and cytokine release, thereby inhibiting CIV replication. Upon silencing of MDA5, cytokine production decreased, while the replication ability of CIV was increased. Thus, this study revealed a novel mechanism by which MDA5 mediated CIV infection and provided new avenues for the development of antiviral strategies.

Short communication: isolation and phylogenetic analysis of an avian-origin H3N2 canine influenza virus in dog shelter, China

Virus Genes ◽  
2013 ◽  
Vol 46 (3) ◽  
pp. 554-557 ◽  
Author(s):  
Shuo Su ◽  
Ziguo Yuan ◽  
Jidang Chen ◽  
Jiexiong Xie ◽  
Huatao Li ◽  
...  
Keyword(s):  
Phylogenetic Analysis ◽  
Influenza Virus ◽  
Short Communication ◽  
Canine Influenza Virus ◽  
Avian Origin ◽  
Canine Influenza

PB2 E627K or D701N substitution does not change the virulence of canine influenza virus H3N2 in mice and dogs

2018 ◽  
Vol 220 ◽  
pp. 67-72 ◽  
Author(s):  
Pei Zhou ◽  
Zhenpeng Cao ◽  
Weijie Zeng ◽  
Xiangqi Hao ◽  
Qingxu Zheng ◽  
...  
Keyword(s):  
Influenza Virus ◽  
Canine Influenza Virus ◽  
Canine Influenza

Prevalence of canine influenza virus A (H3N8) in dogs in Germany

2014 ◽  
Vol 202 (1) ◽  
pp. 184-185 ◽  
Author(s):  
Bianka Schulz ◽  
Christina Klinkenberg ◽  
Robert Fux ◽  
Tara Anderson ◽  
Paola de Benedictis ◽  
...  
Keyword(s):  
Influenza Virus ◽  
Influenza Virus A ◽  
Canine Influenza Virus ◽  
Canine Influenza

scholarly journals High Prevalence and Predominance of the aph(2″)-If Gene Conferring Aminoglycoside Resistance in Campylobacter

2017 ◽  
Vol 61 (5) ◽  
Author(s):  
Hong Yao ◽  
Dejun Liu ◽  
Yang Wang ◽  
Qijing Zhang ◽  
Zhangqi Shen
Keyword(s):  
Horizontal Transmission ◽  
Foodborne Pathogen ◽  
Systemic Infection ◽  
Campylobacter Coli ◽  
Aminoglycoside Resistance ◽  
Content Type ◽  
High Prevalence ◽  
Gentamicin Resistance ◽  
Long Range Pcr ◽  
High Level

ABSTRACT Campylobacter is a major foodborne pathogen, and previous studies revealed that Campylobacter isolates from food-producing animals are increasingly resistant to gentamicin in China. The molecular epidemiology and genetic mechanisms responsible for gentamicin resistance in China have not been well understood. In this study, 607 Campylobacter isolates of chicken and swine origins collected in 2014 were analyzed, revealing that 15.6% (25/160) of the Campylobacter jejuni isolates and 79.9% (357/447) of the Campylobacter coli isolates were resistant to gentamicin. PCR detection of the gentamicin resistance genes indicated that aph(2″)-If was more prevalent than the previously identified aacA/aphD gene and has become the dominant gentamicin resistance determinant in Campylobacter. Transformation and whole-genome sequencing as well as long-range PCR discovered that aph(2″)-If was located on a chromosomal segment inserted between two conserved genes, Cj0299 and panB. Cloning of aph(2″)-If into gentamicin-susceptible C. jejuni NCTC 11168 confirmed its function in conferring high-level resistance to gentamicin and kanamycin. Molecular typing by pulsed-field gel electrophoresis suggested that both regional expansion of a particular clone and horizontal transmission were involved in the dissemination of the aph(2″)-If gene in Campylobacter. To our knowledge, this is the first report describing the high prevalence of a chromosomally encoded aph(2″)-If gene in Campylobacter. The high prevalence and predominance of this gene might be driven by the use of aminoglycoside antibiotics in food animal production in China and potentially compromise the usefulness of gentamicin as a therapeutic agent for Campylobacter-associated systemic infection.

Sign in / Sign up

Export Citation Format

Share Document