The following organisms of the Enterobacteriaecae family exhibit chromosomal 
DNA relatedness (20% or more homology of DNA of various pairs tested) and 
genetic recombination or R-prime (R plasmid carrying chromosomal genes) 
transfer to _E. coli K-12 mediated by the IncP-1 plasmids. 
Ml species of the following genera: 
1. Escherichia (including E. coli K-12) 
2. Shigellae 
3 . Salmonella 
4. Enterobacter 
5. Arizona 
6. Citrobacter 
7. Klebsiellae 
In addition the following species: 
1 . Erwin ia amylovora 
2. Erwinia dissolvens 
3. Erwinia minipressuralis 
4. Serratia narcescens 
5. Levinea malonatica 
6. Levinea amalonatica 
[Appendix A — 295] 
