Host range of 30 novel Arthrobacter globiformis bacteriophages shows modularity and nestedness.

The SEA-PHAGES program maintains an extensive archive of student-discovered Actinobacteriophage as a resource for understanding phage diversity. Here, we examine host range of thirty phages isolated on Arthrobacter globiformis B-2979 against additional strains of A. globiformis and against other isolates within ' Arthrobacter sensu stricto '. Consistent with other reports, host range of these phages was generally narrow. A general relationship between magnitude and prevalence was observed in efficiency of plating on globiformis isolates other than the isolation host, suggesting underlying mechanisms of cross-infectivity.