RT info:eu-repo/semantics/article
T1 Molecular Epidemiology of Invasive Listeriosis due to Listeria monocytogenes in a Spanish Hospital over a Nine-Year Study Period, 2006–2014
A1 Ariza Miguel, Jaime
A1 Fernández Natal, Isabel
A1 Soriano, F.
A1 Hernández Pérez, Marta
A1 Stessl, Beatrix
A1 Rodríguez Lázaro, David
K1 Microbiology
K1 Microbiología
AB We investigated the pathogenicity, invasiveness, and genetic relatedness of 17 clinical Listeria monocytogenes stains isolated over a period of nine years (2006–2014). All isolates were phenotypically characterised and growth patterns were determined. The antimicrobial susceptibility of L. monocytogenes isolates was determined in E-tests. Invasion assays were performed with epithelial HeLa cells. Finally, L. monocytogenes isolates were subtyped by PFGE and MLST. All isolates had similar phenotypic characteristics (β-haemolysis and lecithinase activity), and three types of growth curve were observed. Bacterial recovery rates after invasion assays ranged from 0.09% to 7.26% (1.62 ± 0.46). MLST identified 11 sequence types (STs), and 14 PFGE profiles were obtained, indicating a high degree of genetic diversity. Genetic studies unequivocally revealed the occurrence of one outbreak of listeriosis in humans that had not previously been reported. This outbreak occurred in October 2009 and affected three patients from neighbouring towns. In conclusion, the molecular epidemiological analysis clearly revealed a cluster (three human cases, all ST1) of not previously reported listeriosis cases in northwestern Spain. Our findings indicate that molecular subtyping, in combination with epidemiological case analysis, is essential and should be implemented in routine diagnosis, to improve the tracing of the sources of outbreaks.
PB Hindawi Publishing Corporation
YR 2015
FD 2015
LK http://hdl.handle.net/10259/4410
UL http://hdl.handle.net/10259/4410
LA eng
NO Gerencia Regionalde Salud, Junta de Castilla y Le´on, Spain, research projectGRS 698/A/2011 and the EU 7th Framework Programme through the PROMISE project (Project no. 265877).
DS Repositorio Institucional de la Universidad de Burgos
RD 22-dic-2024