The aims of this study was to determine the presence of Toxoplasma gondii in free-rangechicken using Polymerase Chain Reaction (PCR) method based on the tachyzoite and bradyzoitestage specific genes. SAG1 and BAG1 are the tachyzoite and bradyzoite stage-specific gene respectively.The primers for SAG1 and BAG1 were designed using Web-base Program Primer 3. Genomic DNAfrom free-range chicken heart and brain was isolated using Pure-Link Genomic Isolation Kit.DNA amplification by PCR using primers for SAG1 and BAG1 genes was used for diagnosis ofT.gondii. The results showed that the DNA amplification using primers for SAG1 and BAG1 geneswas successfully applied to determine of Toxoplasma gondii in free-range chicken.
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