| distribution of lag-1 alleles and sequence-based types among legionella pneumophila serogroup 1 clinical and environmental isolates in the united states. | approximately 84% of legionellosis cases are due to legionella pneumophila serogroup 1. moreover, a majority of l. pneumophila serogroup 1 clinical isolates react positively with monoclonal antibody 2 (mab2) of the international standard panel. over 94% of the legionellosis outbreaks investigated by the centers for disease control and prevention are due to this subset of l. pneumophila serogroup 1. to date, there is no complete explanation for the enhanced ability of these strains to cause disea ... | 2009 | 19553574 |