Fascioliasis is one of the major economically important diseases affecting a mass population of sheep and goats in Pakistan. The present study was designed to find out the prevalence of fascioliasis in N.W.F.P., and the serum bilirubin and serum glutamic oxaloacetic transaminase activities in sheep and goats before and after treatment with Nitroxynil.

In this study out of 240 sheep and 360 goats forty sheep (16.667.) and forty goats (11.117.) were found positive for fascioliasis, by applying direct smear and zinc sulphate floatation technique. The eggs per gram of faeces were done by Mc Master eggs counting technique. Serum samples of forty sheep and forty goats positive for fascioliasis and twenty sheep and twenty goats negative for the same were examined for bilirubin and SGOT activities before & after medication with Nitroxynil with a dose rate of 1 ml/20 kg body weight, sub cutaneously. The drug was highly effective in all the infected groups of the animals in eradication of fascioliasis. The efficacy of the drug in the form of the eggs per gram of faeces count was determined and was recorded as 83.907. in sheep and 85.977. in goats.

The mean serum bilirubin value of group "C6" was 0.24 mg/dl, which raised to 0.61 mg/dl, in group "A and to 1.19 mg/di in group "Be". Serum Bilirubin levels of group "Co" was 0.25 mg/dl at day zero while it was 0.69 mg/dl in group "Ag" and 1.09 mg/dl in group "Eg" animals on the same day.

The mean serum bilirubin values of group "C5 and Cg" remained unchanged after 14 days of treatment, while these values were 0.33 mg/dl and 0.33 mg/di in groups "As & Ag" respectively, after 14-days of medication. Similarly in groups "Ba & 8g" the reduction in serum bilirubin after 14- days post treatment also occured and the mean values were recorded as 0.62 mg/di and 0.52 mg/dl respectively.
Pre-medication mean serum glutamic oxaloacetic transaminase activities in group "C5 and Cg" were 40.14 units/mi and 40.15 units/mi respectively. The level of SOOT in these groups remained unchanged after medication, while serum 60T values were 86.95 units/mi and 80.77 units/mi in group "As and AQ" and were 96.75 units/mi and 106.27 units/mi in group "B5 and Bg" respectively, before treatment.

After 14 days of treatment with Nitroxynii the SOOT values of the above groups were significantly reduced, and the values recorded were 70.00 and 54.89 units/mi in "A5 and Ag" and 75.47 and 57.88 units/mi in group "Be, Bg" respectively.