Abstract
An immunoblot (Western) assay was developed employing a species-specific monoclonal antibody to a 43 kDa Mycoplasma pneumoniae membrane polypeptide and a species-specific monoclonal antibody to 29 kDa Legionella pneumophila outer membrane protein. This assay could simultaneously detect these two different antigens directly in sputum. The 43 kDa M. pneumoniae antigen was detected by this assay in each of three M. pneumoniae culture-confirmed sputum specimens. In addition, the 29 kDa L. pneumophila antigen was detected in three of three L. pneumophila culture-confirmed sputum specimens. Neither of these two specific antigens were detected in induced sputum specimens from ten normal individuals.
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