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Journal of Clinical Microbiology, May 1999, p. 1575-1578, Vol. 37, No. 5
Departamento de Sanidad Animal,
Microbiología e Inmunología, Facultad de
Veterinaria, Universidad de León, 24071 León, Spain
Received 9 October 1998/Returned for modification 9 December
1998/Accepted 29 January 1999
The gene (aroA) of Actinobacillus
pleuropneumoniae, serotype 2, encoding
5-enolpyruvylshikimate-3-phosphate synthase was cloned by
complementation of the aroA mutation in Escherichia
coli K-12 strain AB2829, and the nucleotide sequence was
determined. A pair of primers from the 5' and 3' termini were selected
to be the basis for development of a specific PCR assay. A DNA fragment of 1,025 bp was amplified from lysed A. pleuropneumoniae
serotypes 1 to 12 of biovar 1 or from isolated DNA. No PCR products
were detected when chromosomal DNAs from other genera were used as target DNAs; however, a 1,025-bp DNA fragment was amplified when Actinobacillus equuli chromosomal DNA was used as a target,
which could be easily differentiated by its NAD independence. The PCR assay developed was very sensitive, with lower detection limits of 12 CFU with A. pleuropneumoniae cells and 0.8 pg with
extracted DNA. Specificity and sensitivity make this PCR assay a useful method for the rapid identification and diagnosis of A. pleuropneumoniae infections.
0095-1137/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
Molecular Cloning and Sequencing of the
aroA Gene from Actinobacillus pleuropneumoniae
and Its Use in a PCR Assay for Rapid Identification
*
Corresponding author. Mailing address: Departamento de
Sanidad Animal, Microbiología e Inmunología, Facultad
de Veterinaria, Universidad de Léon, 24071 Léon, Spain.
Phone: 34 987 291 294. Fax: 34 987 291 304. E-mail:
dsagnc{at}unileon.es.
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