tetano
Editor, Senior Moderator
Vet Microbiol. 2013 Sep 18. pii: S0378-1135(13)00452-5. doi: 10.1016/j.vetmic.2013.09.013. [Epub ahead of print]
Pathogenicity in domestic ducks and mice of highly pathogenic H5N1 clade 2.3.2.1 influenza viruses recently circulating in Eastern Asia.
Kang HM, Choi JG, Kim KI, Kim BS, Batchuluun D, Erdene-Ochir TO, Kim MC, Kwon JH, Park CK, Lee YJ.
Source
Avian Disease Division, Animal and Plant Quarantine Agency, 175 Anyangro, Anyangsi, Gyeonggido 430-757, Republic of Korea.
Abstract
Influenza virus A (H5N1) clade 2.3.2.1 has recently caused widespread outbreaks of disease in domestic poultry and wild birds in Eastern Asia. In the current study, the antigenicity and pathogenicity of three clade 2.3.2.1 viruses (Ck/Kr/Gimje/08, Ws/Mongolia/1/09, and Ws/Mongolia/7/10) were investigated in domestic ducks and mice. The H5N1 influenza viruses in this study were antigenically similar to each other (r-values of 0.35-1.4). The three viruses replicated systemically in all tissues tested in domestic ducks, indicating high pathogenicity. However, the viruses produced different clinical signs and mortality rates: Ck/Kr/Gimje/08 and Ws/Mongolia/1/09 resulted in 100% mortality with severe neurological signs, whereas Ws/Mongolia/7/10 resulted in 50% mortality with relatively mild neurological signs. In mice, infection with Ck/Kr/Gimje/08 and Ws/Mongolia/7/10 resulted in weight loss that peaked at 4 days post-infection (22.3% and 20.8%, respectively), same MLD50 (2.2 Log10 EID50) and systemic replication. The three viruses had K deletion at the -2 position of the HA1-connecting peptide (PQRERRRK-R), which is associated with increased virulence in domestic ducks and harbored NA stalk deletion, NS1 deletion and mutation of P42S in NS1, and full length (90aa) in PB1-F2, which confer increased virulence in mice. Our study shows that clade 2.3.2.1 viruses from Korea and Mongolia are antigenically similar and highly pathogenic in both domestic ducks and mice. Moreover, we provide molecular determinants of the clade 2.3.2.1 viruses associated with the pathogenicity in domestic ducks and mice, respectively.
Copyright ? 2013 Elsevier B.V. All rights reserved.
KEYWORDS:
Domestic duck, H5N1, HPAI, Mice, Mongolia, South Korea
PMID:
24120936
[PubMed - as supplied by publisher]
http://www.ncbi.nlm.nih.gov/pubmed/24120936
Pathogenicity in domestic ducks and mice of highly pathogenic H5N1 clade 2.3.2.1 influenza viruses recently circulating in Eastern Asia.
Kang HM, Choi JG, Kim KI, Kim BS, Batchuluun D, Erdene-Ochir TO, Kim MC, Kwon JH, Park CK, Lee YJ.
Source
Avian Disease Division, Animal and Plant Quarantine Agency, 175 Anyangro, Anyangsi, Gyeonggido 430-757, Republic of Korea.
Abstract
Influenza virus A (H5N1) clade 2.3.2.1 has recently caused widespread outbreaks of disease in domestic poultry and wild birds in Eastern Asia. In the current study, the antigenicity and pathogenicity of three clade 2.3.2.1 viruses (Ck/Kr/Gimje/08, Ws/Mongolia/1/09, and Ws/Mongolia/7/10) were investigated in domestic ducks and mice. The H5N1 influenza viruses in this study were antigenically similar to each other (r-values of 0.35-1.4). The three viruses replicated systemically in all tissues tested in domestic ducks, indicating high pathogenicity. However, the viruses produced different clinical signs and mortality rates: Ck/Kr/Gimje/08 and Ws/Mongolia/1/09 resulted in 100% mortality with severe neurological signs, whereas Ws/Mongolia/7/10 resulted in 50% mortality with relatively mild neurological signs. In mice, infection with Ck/Kr/Gimje/08 and Ws/Mongolia/7/10 resulted in weight loss that peaked at 4 days post-infection (22.3% and 20.8%, respectively), same MLD50 (2.2 Log10 EID50) and systemic replication. The three viruses had K deletion at the -2 position of the HA1-connecting peptide (PQRERRRK-R), which is associated with increased virulence in domestic ducks and harbored NA stalk deletion, NS1 deletion and mutation of P42S in NS1, and full length (90aa) in PB1-F2, which confer increased virulence in mice. Our study shows that clade 2.3.2.1 viruses from Korea and Mongolia are antigenically similar and highly pathogenic in both domestic ducks and mice. Moreover, we provide molecular determinants of the clade 2.3.2.1 viruses associated with the pathogenicity in domestic ducks and mice, respectively.
Copyright ? 2013 Elsevier B.V. All rights reserved.
KEYWORDS:
Domestic duck, H5N1, HPAI, Mice, Mongolia, South Korea
PMID:
24120936
[PubMed - as supplied by publisher]
http://www.ncbi.nlm.nih.gov/pubmed/24120936