| diversity of francisella species in environmental samples from martha's vineyard, massachusetts. | we determined whether francisella spp. are present in water, sediment, and soil from an active tularemia natural focus on martha's vineyard, massachusetts, during a multiyear outbreak of pneumonic tularemia. environmental samples were tested by polymerase chain reaction (pcr) targeting francisella species 16s rrna gene and succinate dehydrogenase a (sdha) sequences; evidence of the agent of tularemia was sought by amplification of francisella tularensis-specific sequences for the insertion eleme ... | 2010 | 19669828 |