Abstract:
:Twenty-nine staphylococcal isolates from different clinical samples were tested for slime production: phenotypic characterization was carried out using Christensen test (tube test) and Congo red agar plate test (CRA plate test), while the presence and expression of icaA and icaD genes were evaluated by real-time PCR. In 79.3% of studied strains there was a concordance between slime production and presence of icaA and icaD genes, and between lack of slime production and absence of both or only one of the tested genes. In four of five strains where positive phenotype was not associated with the presence of ica genes, gene co-expression (evaluated by mRNA determination) was lacking, while in only a case out of five, there was the presence of transcripts without phenotype. Our study, for the first time, introduces real-time PCR for the detection of both icaA and icaD genes and their mRNA and, furthermore, addresses the relationship between slime phenotype absence and mRNA expression, in clinical isolates of coagulase-negative staphylococci.
journal_name
Microbiol Resjournal_title
Microbiological researchauthors
Liberto MC,Matera G,Quirino A,Lamberti AG,Capicotto R,Puccio R,Barreca GS,Focà E,Cascio A,Focà Adoi
10.1016/j.micres.2007.04.004subject
Has Abstractpub_date
2009-01-01 00:00:00pages
522-8issue
5eissn
0944-5013issn
1618-0623pii
S0944-5013(07)00063-8journal_volume
164pub_type
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