194 documents found, page 1 of 20

Implementação de um questionário epidemiológico a detentores de explorações cas...

A detenção e a criação de animais em explorações caseiras podem representar um risco para a transmissão de agentes patogénicos zoonóticos e de genes de resistência a antibióticos, com impacto na saúde pública. Em Portugal, a ausência de registo de sistemas de produção caseira (SPC) dificulta a caracterização das práticas de gestão e criação de animais, assim como o perfil dos seus proprietários. Este estudo pil...

Genomic Analysis of Antibiotic Resistance and Virulence Profiles in Escherichia...

Sternal bursitis is an underexplored lesion in poultry, often overlooked in microbiological diagnostics. In this study, we characterized 36 Escherichia coli isolates recovered from sternal bursitis in broiler chickens, combining phenotypic antimicrobial susceptibility testing, PCR-based screening, and whole genome sequencing (WGS). The genetic analysis revealed a diverse population spanning 15 sequence types, i...

Surveying genetic markers of antibiotic resistance and genomic background in Ch...

Objectives: To survey genetic markers of potential antimicrobial resistance (AMR) to macrolides and fluoroquinolones among Chlamydia trachomatis–positive samples from the collection of the Portuguese National Reference Laboratory for Sexually Transmitted Infections (STIs), and explore a multiplex PCR approach coupled with NGS to provide complementary information regarding a strain’s genomic backbone. Methods: A...

Dengue and Oropouche virus co-infection in a traveller from Cuba to Portugal

In 2024, unprecedented outbreaks of dengue and Oropouche were reported in the Americas. We describe a documented co-infection with dengue and Oropouche viruses in a 35-year-old traveller from Cuba detected in Portugal. RT-PCR and next-generation sequencing confirmed both viruses. Our findings highlight the need for multiplex arboviral diagnostics in travellers from regions with concurrent outbreaks.

Multi-country and intersectoral assessment of cluster congruence between pipeli...

Different laboratories employ different Whole-Genome Sequencing (WGS) pipelines for Food and Waterborne disease (FWD) surveillance, casting doubt on the comparability of their results and hindering optimal communication at intersectoral and international levels. Through a collaborative effort involving eleven European institutes spanning the food, animal, and human health sectors, we aimed to assess the inter-p...

Probe-based metagenomic pathogen detection: advancing laboratory capacity for c...

Probe-based pathogen enrichment, followed by NGS, is a promising tool for complex diagnosis, overcoming traditional challenges of shotgun metagenomics, namely small microbial/human genetic material ratio and demanding computational resources. Here, we assessed the combined detection performance of two Illumina probe-based panels, the Respiratory and the Urinary Pathogen ID panels (RPIP and UPIP), using 99 clini...

Recurrence, Microevolution, and Spatiotemporal Dynamics of Legionella pneumophi...

We investigated molecular evolution and spatiotemporal dynamics of atypical Legionella pneumophila serogroup 1 sequence type 1905 and determined its long-term persistence and linkage to human disease in dispersed locations, far beyond the large 2014 outbreak epicenter in Portugal. Our finding highlights the need for public health interventions to prevent further disease spread.

Viral genetics and transmission dynamics in the second wave of mpox outbreak in...

Genome-scale analysis of Mycobacterium avium complex isolates from Portugal rev...

Opportunist infections caused by nontuberculous mycobacteria (NTM) have emerged as a significant public health problem. Among these, species of the Mycobacterium avium complex (MAC) are the main responsible for the increase in the number of human disease cases. In order to address the current needs in the detection and surveillance of MAC disease cases, we evaluated different species classification methodologie...

An Overview of Monkeypox Virus Detection in Different Clinical Samples and Anal...

Mpox is a zoonotic disease caused by the Monkeypox virus (MPXV), and since May 2022, tens of thousands of cases have been reported in non-endemic countries. We aimed to evaluate the suitability of different sample types for mpox diagnostic and assess the temporal dynamics of viral load. We evaluated 1914 samples from 953 laboratory-confirmed cases. The positivity rate was higher for lesion (91.3%) and rectal sw...