[Detection of oprI gene of Pseudomonas aeruginosa by reverse dot-blot hybridization].

Objective To establish a rapid method for detecting Pseudomonas aeruginosa at the early stage of infection. Methods Specific primers were designed according to oprI gene sequence of Pseudomonas aeruginosa, and the specific probe was synthesized by PCR. After photosensitive biotin labeling of the bacterial DNA, reverse dot-blot hybridization was used to detect Pseudomonas aeruginosa. Results The probe synthesized was highly specific to Pseudomonas aeruginosa without cross reaction with other bateria, viruses or fungi. The method was capable of detecting 100 ng bacteria DNA. Conclusion Reverse dot-blot hybridization possesses the merits of speediness and specificity in the detection of Pseudomonas aeruginosa in the early stage of infection.