The addition of 2 % pooled rabbit serum to semi-solid commercial EMJH medium with EMJH enrichment and 0,5 mg of 5-fluorouracil per ml was found to enhance the growth rate and success of isolation of Leptospira interrogans serovar hardjo from bovine urine. Cultures made on media without serum had to be kept for more than 130 days before being discarded as negative.
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