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Table 4 Frequency of diarrhea1 (%) of weanling pigs fed diets with different amount and source of copper

From: Optimal dietary copper requirements and relative bioavailability for weanling pigs fed either copper proteinate or tribasic copper chloride

Copper source2 Copper level, mg/kg Pooled SEM P-value
0 5 10 20 40 80 160 200 Treatment Linear Quadratic
TBCC 43.6a 44.0a 43.4a 41.6a 38.4ab 35.8b 36.0b 35.2b 2.02 0.035 0.153 0.021
CuPro 43.6a 43.0a 44.0a 40.0b 39.8b 32.8c,* 35.2c 2.24 0.015 0.037 0.168
  1. a-c Means within a row without a common superscript letter are different (P < 0.05)
  2. * different from the corresponding TBCC group at the same supplemented copper level, P < 0.05
  3. 1 Diarrhea score = 5, watery diarrhea, 4, severe diarrhea, 3, mild diarrhea, 2, moist feces, and 1, normal feces. Frequency of diarrhea was calculated by adding all days for a pig with a score of 3 or greater. Frequency = numbers of pigs with diarrhea / (numbers of pigs × the number of days assessing diarrhea scores) × 100%, the number of days assessing diarrhea scores = 9
  4. 2TBCC  tribasic copper chloride, CuPro  copper proteinate