Burkholderia cepacia complex: distribution of genomovars among isolates from the maize rhizosphere in Italy

Environmental Microbiology
Alessia FioreLuigi Chiarini

Abstract

Burkholderia cepacia is a 'complex' in which seven genomic species or genomovars have so far been identified. It appears that all seven B. cepacia genomovars are capable of causing infections in vulnerable persons; in particular, the importance of Burkholderia multivorans (genomovar II) and B. cepacia genomovar III among cystic fibrosis isolates, especially epidemic ones, has been emphasized. In order to acquire a better comprehension of the genomovar composition of environmental populations of B. cepacia, 120 strains were isolated from the rhizosphere of maize plants cultivated in fields located in northern, central and southern Italy. The identification of the different genomovars was accomplished by a combination of molecular polymerase chain reaction (PCR)-based techniques, such as restriction fragment length polymorphism (RFLP) analysis of 16S rDNA (ARDRA), genomovar-specific PCR tests and RFLP analyses based on polymorphisms in the recA gene whole-cell protein electrophoresis. ARDRA analysis allowed us to distinguish between all B. cepacia genomovars except B. cepacia genomovar I, B. cepacia genomovar III and Burkholderia ambifaria (genomovar VII). The latter genomovars were differentiated by means of recA PCR tests and R...Continue Reading

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Citations

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Dec 17, 2008·Antimicrobial Agents and Chemotherapy·Laurent PoirelPatrice Nordmann
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