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 (PDD 50 ) of the virus pool was determined as 7.35 log 10 PDD 50 /mL, similar to the cell culture infectious titer, 7.75 log 10 plaque-forming units (PFU)/mL. 100 PDD 50 caused watery diarrhea in all conventional suckling piglets ( n = 12) derived from a PEDV-naive sow, whereas 1000 and 10 000 PDD 50 did not cause diarrhea in piglets derived from two PEDV-field exposed-recovered sows. This information is important for future PEDV challenge studies and validation of PEDV vaccines.
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【초록키워드】 Vaccines, diarrhea, virus, Cell culture, information, dose, infectious dose, plaque-forming unit, PEDV, log, caused, median, was determined, watery, 【제목키워드】 virus, virulence, epidemic diarrhea, Determination,
【초록키워드】 Vaccines, diarrhea, virus, Cell culture, information, dose, infectious dose, plaque-forming unit, PEDV, log, caused, median, was determined, watery, 【제목키워드】 virus, virulence, epidemic diarrhea, Determination,