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Table 2 Effects of eugenol essential oil on the relative BWG, lesion score, and ACI of chickens (n = 12)

From: Anticoccidial activity of essential oils containing eugenol against Eimeria tenella in broiler chickens

Groups

rBWG A

S% B

LI C

OI D

ACI E

HD

94.32

100.00

20.83

20.00

153.49

MD

99.87

100.00

22.50

10.00

167.37

LD

93.00

91.67

38.33

10.00

136.34

HC

100.00

100.00

0.00

0.00

200.00

DC

99.77

100.00

10.00

0.00

189.77

IC

79.84

91.67

39.17

40.00

92.34

  1. HD High dose of eugenol essential oil, MD Medium dose of eugenol essential oil, LD Low dose of eugenol essential oil, HC Healthy control group (nontreated and noninfected), DC Decoxyquinate treatment control, IC Infected control group (untreated and infected with E. tenella), rBWG relative body weight gain
  2. ArBWG = (BWG of the infected/unmedicated control or drug-treated group ÷ BWG of healthy control) × 100
  3. BSurvival rate (%) = (number of surviving chickens in each group ÷ number of initial chickens in each group) × 100
  4. CThe lesion index (LI) of the cecum was examined on PI d 8
  5. DOocyst index (OI) of each group at 8 d postinfection (dpi). Oocyst index value = 0 (an oocyst ratio of 0–1%); oocyst index value = 5 (an oocyst ratio of 1–25%); oocyst index value = 10 (an oocyst ratio of 26–50%); oocyst index value = 20 (an oocyst ratio of 51–75%); oocyst index value = 40 (an oocyst ratio of 76–100%); oocyst ratio = (OPG in healthy control or drug-treated group) ÷ (OPG in infected/unmedicated control group) × 100%; OPG, oocyst per gram
  6. EAnticoccidial index (ACI) of each group. ACI = (rBWG + survival rate) × 100 – (lesion score + oocyst index value)