Long chain formation of group N streptococci induced by citric acid

Abstract

Two strains of citrate-fermenting lactic streptococci isolated from milk products grew in markedly long chains with innumerable cells in the broth containing 10 mM or more citrate. Addition of a number of other organic acids and chelaters did not induce the long chain formation. The long chains reduced to normal short ones when divalent cations, such as Mn2+ and Ca 2+, were added to the growth medium.

Citric Acid-induced Long Chain Formation of Streptococcus sp.

“…In a rapid communication, 2) we reported that in the presence of citrate, group N Streptococcus sp. KSM-II06 and KSM-1112 grew as long chains with innumerable cells.…”