Nutritionally variant streptococci from patients with endocarditis: growth parameters in a semisynthetic medium and demonstration of a chromophore.


Nutritionally variant streptococci have been characterized in the past by their growth as satellite colonies and by their nutrient requirements of cysteine or vitamin B6 for growth in complex media. To further understand the growth characteristics of these strains, we studied fresh isolates from patients with endocarditis by using chemically defined medium… (More)


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