Figure. Agarose gel electrophoresis of Coxiella burnetii Trans-polymerase chain reaction products amplified from total DNA of bulk tank milk samples. Lanes 1 to 20, bulk tank milk samples; N, water negative control; P, positive control (DNA of Nine Mile strain). The arrow indicates the amplification of a 687-bp fragment in the IS1111 sequence of Coxiella burnetii.
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