2024-03-29T13:33:50Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/44102022-04-29T12:02:47Zcom_10259_4862com_10259_5086com_10259_2604col_10259_4863
Ariza Miguel, Jaime
Fernández Natal, Isabel
Soriano, F.
Hernández Pérez, Marta
Stessl, Beatrix
Rodríguez Lázaro, David
2017-04-06T11:48:16Z
2017-04-06T11:48:16Z
2015
http://hdl.handle.net/10259/4410
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.
Gerencia Regional
de Salud, Junta de Castilla y Le´on, Spain, research project
GRS 698/A/2011 and the EU 7th Framework Programme through the PROMISE project (Project no. 265877).
application/pdf
eng
Hindawi Publishing Corporation
BioMed Research International. 2015, V. 2015, Article ID 191409, 10 pages
http://dx.doi.org/10.1155/2015/191409
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
Microbiology
Microbiología
Molecular Epidemiology of Invasive Listeriosis due to Listeria monocytogenes in a Spanish Hospital over a Nine-Year Study Period, 2006–2014
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion