Isolation and properties of Citrobacter bacteriophages

Four phages differing in their antigenic properties, thermosensitivity and spectrum of action have been obtained from Citrobacter lysogenic cultures. To prepare the suspension of Citrobacter phages, phagolysates may be treated with chloroform 1:10 for 30 minutes. The isolated phages have proved to be highly specific. The possibility of distinguishing Citrobacter cultures by means of the phages under study has been shown.