HEMATOLOGICAL AND BIOCHEMICAL EFFECTS OF THIABENDAZOLE ON LAYING HENS

Thirty white ''High line'' laying hens were divided into three groups, ten each. The first group was fed on thiabendazole free feedstuff as a control group. The second and the third group were fed on 2 and 4 g thiabendazole per kg feedstuff for five weeks, respectively. The exper iment was extended ten days after stopping the drug. Drop in bodyweigh t gain, egg production and egg weight were recorded in the second and third group of treatment. Reduction in serum iron concentration, RBC a nd WBC counts, HE content, PCV, and total protein in blood were also r ecorded.