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Revista argentina de microbiología

versión On-line ISSN 1851-7617

Resumen

ALMUZARA, M. N. et al. Evaluation of API Coryne system, version 2.0, for diphteroid gram-positive rods identification with clinical relevance. Rev. argent. microbiol. [online]. 2006, vol.38, n.4, pp. 197-201. ISSN 1851-7617.

The ability of the API Coryne system, version 2.0, to identify 178 strains of gram-positive rods was evaluated. Seventy eight isolates belonged to genus Corynebacterium and one hundred to related genera, all strains were isolated from clinical samples at the Laboratory of Bacteriology, Hospital de Clínicas José de San Martín (UBA) between 1995 and 2004.The isolates were identified according to von Graevenitz and Funke&'s scheme. One hundred and sixty two out of 178 strains (91%) were correctly identified at genus and species level (IC95= 85.6-94.6), in 44 of them (24.7%) additional tests were needed to final identification. Sixteen strains (9%) were not correctly identified (IC95=5.4-14.4); none of the 178 strains remained unidentified. The API Coryne system, version 2.0, is useful to identify the majority of Corynebacterium species with clinical relevance: Corynebacterium jeikeium, Corynebacterium urealyticum, Corynebacterium striatum, Corynebacterium pseudodiphtheriticum, Corynebacterium amycolatum and related species such as Arcanobacterium haemolyticum, Dermabacter hominis, Listeria monocytogenes, among others. Nevertheless for yellow-pigmented diphteroid gram-positive rods (Aureobacterium spp., Leifsonia aquatica, Microbacterium spp. and Cellulomonas spp.) and for acid fast gram-positive rods (Rhodococcus, Gordonia, Tsukamurella and Nocardia) the identification usefulness the system is limited.

Palabras llave : gram-positive rods; API Coryne (version 2.0); bacterial identification.

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