Publications by authors named "Anna Fernandez-Arevalo"

Chagas disease (CD) has become a worldwide problem due to globalization. In Europe, most cases are imported and are diagnosed in the chronic phase by two serological tests, as recommended by the World Health Organization. Chemiluminescent microparticle immunoassays (CMIAs) are an emerging alternative to the diagnostic standard.

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Article Synopsis
  • Chagas disease (CD) is gaining attention in the US, originally a Latin American issue, due to increased human migration and the presence of disease vectors and hosts within the country.
  • The research project reviewed 34 studies on the genetic diversity of the disease in triatomine insects and mammalian hosts across 18 US states, primarily focused on Texas, Louisiana, and New Mexico.
  • TcI and TcIV were the main genetic types found, with TcI being the most prevalent, highlighting the need for ongoing monitoring and management of Chagas disease as its distribution may change over time.
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Leishmaniasis is a parasitic disease with clinical presentations that vary from asymptomatic infection to cutaneous, mucocutaneous, or visceral disease. Global change, with migratory movements and travels, among others, has had an impact on the presentation of the clinical forms of leishmaniasis in a given area, hindering its diagnosis. The traditional parasitological techniques have limited sensitivity, and currently, there is no reference or gold-standard molecular diagnostic method.

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In 2009, a large outbreak of leishmaniasis, associated with environmental changes, was declared near Madrid (Spain), in which was the vector, whereas the main reservoirs were hares and rabbits. Analysis of isolates from humans, vectors and leporids from the focus identified the ITS-Lombardi genotype. However, multilocus enzyme electrophoresis (MLEE), the reference technique for typing, and sequencing of the gene, a commonly used marker, were not performed.

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Leishmaniases are zoonotic diseases caused by protozoa of the genus Leishmania. In Bolivia, leishmaniasis occurs mainly in the cutaneous form (CL) followed by the mucosal or mucocutaneous form (ML or MCL), grouped as tegumentary leishmaniosis (TL), while cases of visceral leishmaniasis (VL) are rare. The cases of TL are routinely diagnosed by parasitological methods: Direct Parasitological Exam (DPE) and axenic culture, the latter being performed only by specialized laboratories.

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Matrix-assisted laser desorption/ionization-time of flight mass spectrometry (MALDI-TOF MS) is a proteomic technique with proven efficiency in the identification of microorganisms, such as bacteria, fungi, and parasites. The present study aimed to evaluate the usefulness of MALDI-TOF MS for the characterization of species circulating in Bolivia using gene sequencing as a reference technique. 55 strains that were isolated from patients with tegumentary leishmaniasis were analyzed.

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Article Synopsis
  • Population movements have made Chagas disease a global public health issue, with congenital Chagas disease (cCD) posing significant challenges, especially in non-endemic countries where vertical transmission is the primary concern.
  • Despite some successful control initiatives in endemic regions, the management of cCD varies greatly depending on local policies, leading to diverse approaches and a lack of standardized protocols, particularly in Europe and non-endemic areas.
  • Early detection and treatment of cCD are economically beneficial, but economic constraints, the absence of national health policies in non-endemic countries, and outdated diagnostic methods hinder effective cCD management, highlighting the need for collaboration to develop a unified strategy.
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Article Synopsis
  • - Leishmaniasis, caused by the Leishmania genus, is prevalent in the Americas, particularly with the species L. braziliensis, found in 18 countries, including Bolivia; the study investigates the complex taxonomy surrounding this species.
  • - In Bolivia, analysis of 41 strains revealed a distribution of 24 L. braziliensis, 16 L. braziliensis outliers, and 1 L. peruviana, with significant genetic distinctions identified through sequencing.
  • - Among 32 patients with tegumentary leishmaniasis, 69% had cutaneous lesions while 31% had mucocutaneous lesions; treatment failures were noted in several cases, highlighting the complexities in managing these infections
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Leishmaniasis is a transmissible disease caused by Leishmania protozoa. Spain is endemic for both visceral and cutaneous leishmaniasis, the autochthonous aetiological agent being Leishmania infantum. Around the world, the L.

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Among the 20 or so Leishmania spp. described as pathogenic for humans, those of the Leishmania donovani complex are the exclusive causative agents of systemic and fatal visceral leishmaniasis. Although well studied, the complex is taxonomically controversial, which hampers clinical and epidemiological research.

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Human leishmaniases are widespread diseases with different clinical forms caused by about 20 species within the genus. species identification is relevant for therapeutic management and prognosis, especially for cutaneous and mucocutaneous forms. Several methods are available to identify species from culture, but they have not been standardized for the majority of the currently described species, with the exception of multilocus enzyme electrophoresis.

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Trypanosoma cruzi, the causative agent of Chagas disease, is divided into six Discrete Typing Units (DTUs): TcI-TcVI. We aimed to identify T. cruzi DTUs in Latin-American migrants in the Barcelona area (Spain) and to assess different molecular typing approaches for the characterization of T.

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