Zhongyan Lu

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To understand the progression of porcine epidemic diarrhea virus infection, we inoculated gnotobiotic pigs with a newly emerged US strain, PC21A, of the virus. At 24–48 hours postinoculation, the pigs exhibited severe diarrhea and vomiting, fecal shedding, viremia, and severe atrophic enteritis. These findings confirm that strain PC21A is highly(More)
To verify whether porcine deltacoronavirus infection induces disease, we inoculated gnotobiotic pigs with 2 virus strains (OH-FD22 and OH-FD100) identified by 2 specific reverse transcription PCRs. At 21-120 h postinoculation, pigs exhibited severe diarrhea, vomiting, fecal shedding of virus, and severe atrophic enteritis. These findings confirm that these(More)
Catabolite control protein A (CcpA) is the major transcriptional regulator in carbon catabolite repression in several Gram-positive bacteria. We attempted to characterize the role of a CcpA homologue of Streptococcus suis type 2 in sugar metabolism and virulence. Addition of glucose or sucrose to the defined medium significantly reduced the activity of(More)
The infectious dose of a virus pool of original US PEDV strain PC22A was determined in 4-day-old, cesarean-derived, colostrum-deprived (CDCD) piglets. The median pig diarrhea dose (PDD50) of the virus pool was determined as 7.35 log10 PDD50/mL, similar to the cell culture infectious titer, 7.75 log10 plaque-forming units (PFU)/mL. 100 PDD50 caused watery(More)
Up-to-date business intelligence has become a critical differentiator for the modern data-driven highly engaged enterprise. It requires rapid integration of new information on a continuous basis for subsequent analyses. ETL-based and traditionally batch-processing oriented methods of absorbing changes into a relational database schema take time, and are(More)
Low-grade inflammation from hepatocytes plays a causal role in hepatic and systemic insulin resistance (IR). We aimed to explore whether and how FOXO1 was involved in IR-related inflammation in hepatocytes. We determined FOXO1 expression and activity, insulin and NF-κB signaling, and pro-inflammatory cytokine production in tumor necrosis factor-α (TNF-α)-(More)
As it becomes ever more pervasively engaged in data driven commerce, a modern enterprise becomes increasingly dependent upon reliable and high speed transaction services. At the same time it aspires to capitalize upon large inflows of information to draw timely business insights and improve business results. These two imperatives are frequently in conflict(More)
Although the original US porcine epidemic diarrhea virus (PEDV) was confirmed as highly virulent by multiple studies, the virulence of spike-insertion deletion (S-INDEL) PEDV strains is undefined. In this study, 3-4 day-old conventional suckling piglets were inoculated with S-INDEL PEDV Iowa106 (4 pig litters) to study its virulence. Two litters of(More)
Sapoviruses (SaVs) are enteric caliciviruses that have been detected in multiple mammalian species, including humans, pigs, mink, dogs, sea lions, chimpanzees, and rats. They show a high level of diversity. A SaV genome commonly encodes seven nonstructural proteins (NSs), including the RNA polymerase protein NS7, and two structural proteins (VP1 and VP2).(More)