Determination of sensitivity and specificity of ultrasonography in diagnosis of hydatid cysts in the liver and right lung of sheep and goa

Abstract

Ultrasound examination of the liver and right lung followed by postmortem examination was performed in 300 animals (16 sheep and 284 goats). Thirty one (10.3%) were positive for hydatid cysts on ultrasound examination and 46 (15.3%) were positive on postmortem examination. Twenty-one hydatid positives on postmortem examination were falsely identified as negatives on ultrasound examination. Of the 254 animals negative on postmortem examination 6 (2.4%) were falsely identified as positive on ultrasound examination. The Sensitivity and specificity of ultrasound examination in detection of hydatid cysts in sheep and goats was 54.36% and 97.645 respectively. The positive predictive value was 80.64% while the negative predictive value was 92.19%.