Table 6.

Average and frequency of dark colonies in rainbow agar inE. coli strains isolated from various wild hosts

Origin of hostHost orderNo. of isolatesAvg no. of VT-positive strains ± SEFrequency of VT-positive strains
Mexico and South AmericaAll orders121a 0.64 ± 0.060.60
Ungulata 180.39 ± 0.140.33
Carnivora340.53 ± 0.10.47
Chiroptera130.69 ± 0.170.61
Lagomorpha70.29 ± 0.170.28
Primates100.30 ± 0.140.33
Rodentia341.09 ± 0.140.69
Australia All orders46a 0.57 ± 0.10.45
Marsupialia210.48 ± 0.160.33
Rodentia170.82 ± 0.150.66
  • a The continental total includes small orders of mammalian hosts.