Figure 2From: Infrequent detection of Pneumocystis jirovecii by PCR in oral wash specimens from TB patients with or without HIV and healthy contacts in Tanzania PCR products subjected to agarose gel electrophoresis. Lane 1: a positive control with amplified DNA from purified P. jirovecii from lung tissue. Lanes 2, 3, 5 and 6 are negative samples amplifying the internal process control. Lane 4: Sample from patient. P. jirovecii reaction is positive as both the internal process control and P. jirovecii DNA of 346 base pairs are amplified.Back to article page