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Porcine reproductive and respiratory syndrome (PRRS) is a severe viral disease in pigs, causing great economic losses worldwide each year. The causative agent of the disease, PRRS virus (PRRSV), is a member of the family Arteriviridae. Here we report our investigation of the unparalleled large-scale outbreaks of an originally unknown, but so-called "high(More)
Since April 2010, a severe outbreak of duck viral infection, with egg drop, feed uptake decline and ovary-oviduct disease, has spread around the major duck-producing regions in China. A new virus, named BYD virus, was isolated in different areas, and a similar disease was reproduced in healthy egg-producing ducks, infecting with the isolated virus. The(More)
Highly pathogenic porcine reproductive and respiratory syndrome (HP-PRRS) characterized by high fever, high morbidity, and high mortality in pigs of all ages emerged in China in 2006 and spread rapidly throughout Southeast Asia. In July 2010, a highly contagious swine disease with clinical signs similar to those of HP-PRRS was observed in the Lao People's(More)
A high-mortality swine disease, the highly pathogenic porcine reproductive and respiratory syndrome (HP-PRRS), reappeared in some regions of China in 2009. To explore the possible mechanisms underlying the emergence of HP-PRRSV and more fully understand the extent of the genetic diversity of this virus in China, the complete genome of 14 isolates from 10(More)
Highly pathogenic porcine reproductive and respiratory syndrome (HP-PRRS) initially emerged in China and currently prevails in other Asian countries as well, resulting in immense economic losses. HP-PRRS virus (HP-PRRSV) has undergone rapid evolution since its first recognition in 2006. To analyze the genomic and pathogenic characteristics of 2010 HP-PRRSV,(More)
Porcine circovirus diseases (PCVD) are globally emerging diseases that have huge economic impacts on swine industry. Porcine circovirus type 2 (PCV2) is considered to be the essential primary causative agent of PCVD. In the present study, recombination analyses of PCV2 identified two possible recombination events with high confidence using recombination(More)
Pigs have been confirmed to be reservoirs of some genotypes of hepatitis E virus (HEV), and other nonhuman species are also likely infected with the virus. To assess the prevalence of HEV infection in domestic animals in China, 3579 serum samples, including 1967 swine, 700 goat, and 912 cattle sera, were collected from 26 provinces across the country and(More)
Neospora caninum has been detected in several wild mammalian species, i.e., deer, coyotes, dingoes, and foxes. Farm-bred foxes were rarely reported to be affected by the parasite. In this study, we detected for the first time the infection of N.caninum in farm-bred young blue foxes (Alopex lagopus) in China. Neospora-like tissue cysts were observed in(More)
Porcine circovirus type 2 (PCV2) is continuously evolving through point mutation and genome recombination. In the present study, genetic affiliations of 40 PCV2 strains were determined by amplification, sequencing and phylogenetic analyses during the nationwide molecular epidemiology investigation from 2009 to 2010 in mainland China. The results revealed(More)