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Characteristics of five bacteriophages of yellow-pigmented enterobacteria

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Abstract

Four bacteriophages (C2, C2F, E3, and E16P) belonging to morphological group C3 and one belonging to morphological group A3 (E16B) were purified by deuterium oxide gradient centrifugation and cesium chloride gradient centrifugation. Morphological group C3 phages had a densityd=1.534−1.541 and group A3 phage (E16B) had a densityd=1.492 in CsCl. Phages of morphological group C3 isolated onEnterobacter sakazakii (C2, C2F) and onErwinia herbicola (E3, E16P) were compared withSalmonella newport phage 7-11 with respect to host-range, genome size, antigenic relatedness, and ultraviolet and heat susceptibility. Phages C2 and C2F could multiply inEnterobacter cloacae, E. sakazakii, Erwinia herbicola, E. rhapontici, andLevinea malonatica; whereas phages E3, E16P, and 7-11 could multiply on these same species and onEscherichia coli and severalSalmonella serotypes. Molecular weights of phage DNAs were determined to be 58×106 (C2), 60×106 (7-11), 67×106 (E3), and 39×106 (E16B).

All studied phages of morphological group C3 (includingSalmonella newport phage 7-11) were neutralized by anti-phage C2 serum. Despite differences in neutralization kinetics and in ultraviolet and heat sensitivities, these phages of morphological group C3 constitute one phage species. Phage E16B (morphological group A3) had a host-range limited toEnterobacter cloacae, Erwinia herbicola, andE. rhapontici; it was antigenically unrelated to the preceding phage group C3, and showed ultraviolet and heat susceptibility close to that of coliphage T4.

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  1. Service des Entérobactéries, INSERM Unité 199, Institut Pasteur, F-75724, Paris Cedex, France

    Francine Grimont & Patrick A. D. Grimont

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  1. Francine Grimont
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  2. Patrick A. D. Grimont
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Grimont, F., Grimont, P.A.D. Characteristics of five bacteriophages of yellow-pigmented enterobacteria. Current Microbiology 5, 61–66 (1981). https://doi.org/10.1007/BF01566600

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