Experimental infection of a newly emerging Korean type I porcine reproductive and respiratory syndrome virus isolate in colostrum-deprived pigs

Cited 7 time in scopus
Metadata Downloads
Title
Experimental infection of a newly emerging Korean type I porcine reproductive and respiratory syndrome virus isolate in colostrum-deprived pigs
Author(s)
Hye Kwon Kim; C S Lee; B K Kang; M J Yeom; H J Moon; S J Park; V G Nguyen; Dae Sub Song; B K Park
Bibliographic Citation
Virology Journal, vol. 8, pp. 177-177
Publication Year
2011
Abstract
Background: Recently, new emergence of type I PRRSV has been reported in Korea by several research groups. Although specific subgroups of type I PRRSVs in Korea were observed in the previous phylogenetic analysis, there is a lack of information about the virulence of type I PRRSV recently isolated in Korea. Methods: One type I PRRSV isolate (G2446, 3 times passaged in primarily cultured pulmonary macrophages) in Korea was experimentally infected in colostrum-deprived pigs. The pathological and serological evaluations were performed and compared to type II PRRSV strain (CP07-401-9, 5 times passaged in MARC-145 cell lines)-infected pigs, for 21 days post challenge (dpc). Results: The pneumonia found in gross examination was more severe in type I PRRSV-infected pigs than type II PRRSV-infected pigs. Both groups showed bronchointerstitial pneumonia, mild multifocal perivascular lymphohistiocytic myocarditis and lymphadenopathy at 14 dpc. However, the unique histopathologic lesions were not found in the pigs experimentally infected with a Korean type I PRRSV isolate, when compared to previous data about classical pathology of PRRSV. The PRRS-specific antibodies were detected in the first week after challenge and viremia continued at least until 21 dpc in both groups. Conclusion: The gross and histopathologic lesion in this study indicated that Korean type I PRRSV strain (G2446) caused classical PRRSV-specific lesions. Although this study evaluated one representative strain of Korean type I PRRSV, the results may provide information regarding the pathogenicity of type I PRRSV recently emerged in Korea.
Keyword
emergingExperimentalinfectionKoreatype I PRRSV
ISSN
1743-422X
Publisher
Springer-BMC
DOI
http://dx.doi.org/10.1186/1743-422X-8-177
Type
Article
Appears in Collections:
1. Journal Articles > Journal Articles
Files in This Item:

Items in OpenAccess@KRIBB are protected by copyright, with all rights reserved, unless otherwise indicated.