Derivation of a Borg Strain of Chlamydia psittaci Attenuated for Mice.
The method of derivation and virulence of a new attenuated variant (ABG) obtained during passage of the virulent Borg strain in embryonated eggs in the presence of p-aminobenzoic acid are described.
Hearn
H J
HJ
Aerobiology and Evaluation Laboratories, Fort Detrick, Frederick, Maryland 21701.
Herring
A S
AS