Figure 2

Bacterial loads in C57Bl/6J mice infected subcutaneously with either wild type or pGEN- luxCDABE -carrying Y. pestis. Animals were infected with ~200 CFU at a cervical site. Organs were harvested and plated for bacterial counts at the indicated hours post inoculation. Bacterial numbers are reported in CFU/g of tissue. Gray and white symbols represent organs from animals infected with Y. pestis and Y. pestis carrying pGEN-luxCDABE, respectively. Each mark represents a value from a single organ and the horizontal lines represent the median of the group. Superficial cervical lymph nodes are represented as circles, spleens as squares, and lungs as triangles. A dotted line represents the limit of detection and an x letter represents missing values of a specific tissue due to the death of an animal. Data shown from a single experiment.