Animal model of Pneumocystis carinii pneumonia (PCP) was established for acquiring lung tissue infected with P. carinii. After DNA from rat lungs was extracted, nuclear ribosome small subunit 18s rDNA of P. carinii was amplified by loop-mediated isothermal amplification method at 63 degrees C for 60 min. The product was digested by restriction enzyme Apal I. The results showed that 18s ribosome DNA (rDNA) of P. carinii was cloned into vector pGEX6p2, and the positive clones screened. Therefore, the loop-mediated isothermal amplification has been established for detecting P. carinii.
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