Aránzazu Portillo

Dr. Aránzazu Portillo

CRETAV, Infectious Diseases, Hospital Universitario San Pedro-CIBIR (FRS), Logroño, La Rioja, Spain
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Research Focus & Metrics

Academic Career Length

29Years (1998-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 December 2012 in Ticks and Tick-borne Diseases
Verified
Journal Article
Closed access
José A. OteoJosé A. Oteo
José A. Oteo
Aránzazu PortilloAránzazu Portillo
Aránzazu Portillo

1 September 2007 in Emerging Infectious Diseases
Verified
Journal Article
Open access
IJIsabel Jado
Isabel Jado
José A. OteoJosé A. Oteo
José A. Oteo
MAMikel Aldámiz
Mikel Aldámiz
HGHoracio Gil
Horacio Gil
RERaquel Escudero
Raquel Escudero
PAPedro Anda
Pedro Anda
We identified Rickettsia monacensis as a cause of acute tickborne rickettsiosis in 2 humans. Its pathogenic role was assessed by culture and detection of the organism in patients’ blood samples. This finding increases the number of recognized human rickettsial pathogens and expands the known geographic distribution of Mediterranean spotted fever–like cases.

1 April 2000 in Antimicrobial Agents and Chemotherapy
Verified
Journal Article
Open access
PDF file
Aránzazu PortilloAránzazu Portillo
Aránzazu Portillo
FLFernanda Ruiz Larrea
Fernanda Ruiz Larrea
MZMyriam Zarazaga
Myriam Zarazaga
AAAna Alonso
Ana Alonso
JMJose Martinez
Jose Martinez
Carmen TorresCarmen Torres
Carmen Torres
Seventy-eight isolates of different Enterococcus species ( E. faecalis , n = 27; E. faecium , n = 23; E. durans , n = 8; E. avium , n = 6; E. hirae , n = 9; E. gallinarum , n = 3; and E. casseliflavus , n = 2) with a variety of erythromycin resistance phenotypes were examined for the presence of macrolide resistance genes ( ermA , ermB , ermC , ermTR , mefA/E , and msrA ). Positive PCR amplifications of ermB were obtained for 39 of 40 highly erythromycin-resistant Enterococcus isolates (MICs, >128 μg/ml) of different species; the remaining highly resistant E. faecium isolate was positive for PCR amplification of ermA but was negative for PCR amplification of the ermB and ermC genes. For all enterococcal strains for which erythromycin MICs were ≤32 μg/ml PCRs were negative for erm methylase genes. For all E. faecium isolates PCR amplified products of the expected size of 400 bp were obtained when msrA primers were used, with the results being independent of the erythromycin resistance phenotype. All the other enterococcal species gave negative results by msrA PCRs. Sequencing of the msrA PCR products from either erythromycin-susceptible, low-level-resistant, or highly resistant E. faecium strains showed that the amplicons did not correspond to the msrA gene described for Staphylococcus epidermidis but corresponded to a new putative efflux determinant, which showed 62% identity with the msrA gene at the DNA level and 72% similarity at the amino acid level. This new gene was named msrC .

1 January 2012 in Emerging Infectious Diseases
Verified
Journal Article
Open access
Agustin Estrada-PeñaAgustin Estrada-Peña
Agustin Estrada-Peña
APAna Maria Palomar
Ana Maria Palomar
PSPaula Santibáñez
Paula Santibáñez
NSNely Sánchez
Nely Sánchez
MHMiguel A. Habela
Miguel A. Habela
José A. OteoJosé A. Oteo
José A. Oteo

1 November 2015 in Microbes and Infection
Verified
Journal Article
Closed access
Aránzazu PortilloAránzazu Portillo
Aránzazu Portillo
SSSonia Santibáñez
Sonia Santibáñez
LGLara García-Álvarez
Lara García-Álvarez
APAna Maria Palomar
Ana Maria Palomar
José A. OteoJosé A. Oteo
José A. Oteo

1 February 2013 in Emerging Infectious Diseases
Verified
Journal Article
Open access
APAna Maria Palomar
Ana Maria Palomar
Aránzazu PortilloAránzazu Portillo
Aránzazu Portillo
PSPaula Santibáñez
Paula Santibáñez
DMDavid Mazuelas
David Mazuelas
JAJuan Arizaga
Juan Arizaga
José A. OteoJosé A. Oteo
José A. Oteo
Crimean-Congo hemorrhagic fever virus was detected in ticks removed from migratory birds in Morocco. This finding demonstrates the circulation of this virus in northwestern Africa and supports the hypothesis that the virus can be introduced into Europe by infected ticks transported from Africa by migratory birds.