The effects of experimental Ascaris suum infection in Yankasa lambs were investigated. Twenty four (24) Yankasa lambs aged 6-8 months were purchased and randomly divided into two groups (1 and 2). The lambs in group 1, consisting of 16 animals, were orally infected with 1500 infective A. suum eggs daily for seven consecutive days while those in group 2, consisting of 8 animals were maintained as non-infected/control group. All the experimental animals were closely monitored for 10 weeks, during which faecal samples were collected and analysed; and biochemical parameters of the blood samples were also evaluated. A total of seven animals (six from the infected and one from the control group) were humanely sacrificed on days 7, 14, 28 and 56 post-infection (p.i.) for larval/worm recovery, gross and histopathological examinations of organs. The values of aspartate aminotransferase (AST) and alanine aminotransferase (ALT) from animals in the infected group increased significantly (P
Key words: Ascaris suum, Histopathology, Lambs, Larvae, Pathology
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