Figure 4.

Room configuration for culturing for HMV K. pneumoniae after cage spray. In an effort to determine the environmental spread of HMV K. pneumoniae, covered MacConkey culture plates were placed on trays while an animal caretaker sprayed waste material from cages. As soon as the caretaker had completed the spray-down, plate covers were removed. Plates in position A (inset) remained in place from 0 to 60 min after spraying. In position B, 3 sets of plates were rotated at predetermined time points: set 1 remained in place from 0 to 5 min, set 2 from 5 to 10 min, and set 3 from 10 to 60 min after spraying.