1887

Abstract

SUMMARY. One hundred and twenty consecutive isolates of from the County of Avon, UK, were examined by auxotyping and penicillin susceptibility testing. Requirements for proline (Pro), arginine (Arg), hypoxanthine (Hyp), uracil (Ura) and methionine (Met) were determined with a modified Heckels' medium. Prototrophic strains accounted for 29.9% of isolates and were a heterogeneous group as judged by penicillin susceptibility testing. The group most generally susceptible to penicillin required Arg-Hyp-Ura, and represented 27.5% of isolates. The Pro-Arg°-Ura auxogroup (10% of isolates) had the narrowest range of penicillin susceptibility. Prototrophic strains had a reduced growth rate on arginine-free medium. Investigations of this phenomenon and suitable methods for auxotyping are reported.

Loading

Article metrics loading...

/content/journal/jmm/10.1099/00222615-16-3-295
1983-08-01
2019-10-19
Loading full text...

Full text loading...

http://instance.metastore.ingenta.com/content/journal/jmm/10.1099/00222615-16-3-295
Loading
This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error