Serological study of Nocardia pellegrino

The serological relationship between Nocardia pellegrino strains was studied by means of immunodiffusion technique. Seven reference precipitation systems, including Nocardia asteroides (three strains), N. pellegrino Sn 5112, Rhodococcus, rhodochrous (two strains) and N. erythropolis were used. With one exception all of the strains of Nocardia pellegrino examined, seemed to be serologically related to the reference strain of N. pellegrino Sn 5112. They showed 4-5 common precipitates.