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Table 4 Summary of mean PCR Ct and FFU/mL across all 4 batches of non-treated ingredients

From: Modeling the transboundary risk of feed ingredients contaminated with porcine epidemic diarrhea virus

Ingredient Mean Mean Mean Mean
Ct/FFU titer Ct/FFU titer Ct/FFU titer Ct/FFU titer
Batch 1 Batch 2 Batch 3 Batch 4
Soybeans (organic) 20.76/5120 23.27/neg 26.42/neg 25.52/neg
Soybean meal (organic) 19.20/40,960 19.10/1920 20.10/800 22.55/60
Soybeans (conventional) 22.39/3840 24.18/40 28.86/neg 20.99/neg
Soybean meal
(conventional)
19.75/7680 19.71/1920 19.76/5120 16.04/60
Lysine hydrochloride 18.54/1280 18.51/40 18.79/100 17.83/100
D-L methionine 22.17/2560 21.25/neg 25.03/neg 19.50/neg
Tryptophan 23.56/160 22.54/neg 25.30/neg 21.31/neg
Vitamin A 25.22/neg 22.66/neg 25.23/neg 26.85/neg
Vitamin D 22.28/3840 21.29/640 22.72/320 20.94/40
Vitamin E 28.54/neg 22.86/neg 26.15/neg 30.86/neg
Choline chloride 20.82/40 20.90/40 20.41/neg 20.77/neg
Rice hulls 24.73/neg 24.47/neg 25.93/neg 22.99/neg
Corn cobs 23.66/80 22.83/neg 24.68/neg 24.49/neg
Tetracycline 38/neg 38/neg 38/neg 38/neg
(−) control feed 38/neg 38/neg 38/neg 38/neg
Virus stock 17.15/245,760 18.86/30 21.19/neg 23.73/neg
  1. Ingredient: Two 30 g replicates per ingredient
  2. Mean Ct/FFU titer: Mean Ct value and FFU/mL across the 2 samples per ingredient