Publications by authors named "Anna Papa"

Crimean-Congo haemorrhagic fever (CCHF) is a widely distributed and potentially fatal tick-borne viral disease with no licensed specific treatments or vaccines. In 2019, WHO published an advanced draft of a research and development roadmap for CCHF that prioritised the development and deployment of the medical countermeasures most needed by CCHF-affected countries. This Personal View presents updated CCHF research and development priorities and is the product of broad consultation with a working group of 20 leading experts in 2023-24.

View Article and Find Full Text PDF
Article Synopsis
  • Extended-spectrum-β-lactamase (ESBL) and carbapenemase-producing Enterobacterales in hospital kitchens are associated with antibiotic resistance, presenting risks for patient infections.
  • This study aimed to evaluate the prevalence and characteristics of β-lactam-resistant strains from kitchen environments and hospital staff in two Greek hospitals.
  • Findings show a notable prevalence of resistant strains in kitchens and a connection between kitchen and patient strains, indicating that kitchen environments may act as reservoirs for these harmful pathogens.
View Article and Find Full Text PDF

ticks are vectors of a plethora of pathogens. The purpose of this study was to screen 398 ticks for a variety of pathogens. Following the pooling, homogenization, and extraction of total nucleic acids, a real-time PCR was applied for the detection of a panel of tick-borne pathogens, while additional conventional PCRs combined with Sanger sequencing were applied for the detection of viruses and typing of and species.

View Article and Find Full Text PDF
Article Synopsis
  • * Norwaviruses and orthonairoviruses are notable as they can lead to febrile illnesses in humans, while some orthonairoviruses can cause varying degrees of disease severity in mammals, from mild to fatal.
  • * Nairovirids produce enveloped virions with one to three single-stranded RNA segments that code for essential proteins, including nucleoproteins and RNA polymerases necessary for their replication.
View Article and Find Full Text PDF

The Third International Conference on Crimean-Congo Hemorrhagic Fever (CCHF) was held in Thessaloniki, Greece, September 19-21, 2023, bringing together a diverse group of international partners, including public health professionals, clinicians, ecologists, epidemiologists, immunologists, and virologists. The conference was attended by 118 participants representing 24 countries and the World Health Organization (WHO). Meeting sessions covered the epidemiology of CCHF in humans; Crimean-Congo hemorrhagic fever virus (CCHFV) in ticks; wild and domestic animal hosts; molecular virology; pathogenesis and animal models; immune response related to therapeutics; and CCHF prevention in humans.

View Article and Find Full Text PDF

Background: West Nile virus (WNV) outbreaks in birds, humans, and livestock have occurred in multiple areas in Europe and have had a significant impact on animal and human health. The patterns of emergence and spread of WNV in Europe are very different from those in the US and understanding these are important for guiding preparedness activities.

Methods: We mapped the evolution and spread history of WNV in Europe by incorporating viral genome sequences and epidemiological data into phylodynamic models.

View Article and Find Full Text PDF

Background: Although ceftazidime/avibactam (CAZ/AVI) has become an important option for treating adults and children, no data or recommendations exist for neonates. We report a neonatal sepsis case due to CAZ/AVI-resistant -harboring carrying and the use of a customized active surveillance program in conjunction with enhanced infection control measures.

Methods: The index case was an extremely premature neonate hospitalized for 110 days that had been previously treated with multiple antibiotics.

View Article and Find Full Text PDF
Article Synopsis
  • In April 2023, the International Committee on Taxonomy of Viruses (ICTV) approved changes to the phylum's classification during their annual vote.
  • The update included the addition of one new family, 14 new genera, and 140 new species.
  • Additionally, the taxonomy featured the renaming of two genera and 538 species, along with the removal of one species and the abolition of four others.
View Article and Find Full Text PDF

Since 2010, the West Nile virus (WNV) has been established in Greece. We describe the epidemiology of diagnosed human WNV infections in Greece with a focus on the 2022 season. During the transmission period, clinicians were sending samples from suspected cases for testing.

View Article and Find Full Text PDF

In May 2022, for the first time, multiple cases of mpox were reported in several non-endemic countries. The first ever case of the disease in Greece was confirmed on 8 June 2022, and a total of 88 cases were reported in the country until the end of April 2023. A multidisciplinary response team was established by the Greek National Public Health Organization (EODY) to monitor and manage the situation.

View Article and Find Full Text PDF
Article Synopsis
  • Carbapenem-resistant Klebsiella pneumoniae (CRKP) poses a major public health threat, and this study investigated its genetic characteristics and resistance genes in a Greek hospital’s intensive care units.
  • Researchers analyzed 24 CRKP isolates collected between 2018-2022 using next-generation sequencing and various bioinformatics tools to assess their genetic makeup and evolutionary relationships.
  • Findings revealed eight different sequence types among the isolates, with notable diversity in resistance genes and clonal distribution, particularly highlighting the distinct branches of ST15, ST323, and ST39, along with highly divergent ST11 isolates.
View Article and Find Full Text PDF
Article Synopsis
  • A 47-year-old Caucasian male traveler from an mpox-endemic region presented with a recent skin rash limited to his genital area, featuring distinct papules, vesicles, and pustules.
  • The rash showed multiple stages of lesions at the same site, which is an uncommon clinical presentation.
  • The patient exhibited symptoms like fever, fatigue, and a blood-tinged cough, leading to a suspicion of mpox, later confirmed as a West African clade non-variola orthopox virus through PCR testing.
View Article and Find Full Text PDF
Article Synopsis
  • Greece was significantly impacted by the West Nile virus (WNV) in 2022, particularly in Central Macedonia, which accounted for 81.5% of reported human cases.
  • A study collected over 30,000 Culex pipiens mosquitoes from the region, testing 690 pools for WNV, and found a 5.9% infection rate with variations across different areas and months.
  • The WNV detected belonged to the Central European subclade of lineage 2, showing slight genetic differences from the strain identified in Greece in 2010, highlighting the importance of mosquito monitoring for early virus detection and understanding its evolution.
View Article and Find Full Text PDF

West Nile virus (WNV) is an emerging neurotropic RNA virus and a member of the genus . Naturally, the virus is maintained in an enzootic cycle involving mosquitoes as vectors and birds that are the principal amplifying virus hosts. In humans, the incubation period for WNV disease ranges from 3 to 14 days, with an estimated 80% of infected persons being asymptomatic, around 19% developing a mild febrile infection and less than 1% developing neuroinvasive disease.

View Article and Find Full Text PDF

SARS-CoV-2 infections may present with various symptoms that are similar to those of other respiratory diseases. For this reason, the need for simultaneous detection of at least RSV and influenza viruses together with SARS-CoV-2 was evident from the early stages of the pandemic. In the present study, we evaluated the clinical performance of the NeuMoDx™ Flu A-B/RSV/SARS-CoV-2 Vantage Assay against the conventional low-plex PCR utilized to detect influenza A-B, RSV, and SARS-CoV-2.

View Article and Find Full Text PDF
Article Synopsis
  • * It was expanded to include two new families, 41 new genera, and 98 new species, along with reclassifications for 349 species.
  • * The article details the updated taxonomy of Negarnaviricota, including corrections of misspelled names for seven species.
View Article and Find Full Text PDF
Article Synopsis
  • The study examined the prevalence and genetic characteristics of methicillin-resistant Staphylococcus aureus (MRSA) in meat, environment, and workers at two meat-processing facilities in northern Greece.
  • Out of 160 samples, MRSA was found in only 0.6%, while most isolates showed low antimicrobial resistance but notable resistance to penicillin and amoxicillin.
  • Genetic analysis revealed distinct populations of MRSA at the two locations and highlighted the importance of hygiene practices to prevent the spread of this pathogen.
View Article and Find Full Text PDF

Introduction: Methicillin-resistant Staphylococcus aureus (MRSA) causes severe community and hospital acquired infections. Identification of staphylococcal cassette chromosome mec (SCCmec), multilocus-sequence typing, and sequencing of S. aureus protein A (spa) gene are used for MRSA typing.

View Article and Find Full Text PDF

Epidemic spread models are useful tools to study the spread and the effectiveness of the interventions at a population level, to an epidemic. The workhorse of spatially homogeneous class models is the SIR-type ones comprising ordinary differential equations for the unknown state variables. The transition between different states is expressed through rate functions.

View Article and Find Full Text PDF

Crimean-Congo haemorrhagic fever virus (CCHFV) is the medically most important member of the rapidly expanding bunyaviral family . Traditionally, CCHFV isolates have been assigned to six distinct genotypes. Here, the International Committee on Taxonomy of Viruses (ICTV) Study Group outlines the reasons for the recent decision to re-classify genogroup VI (aka Europe-2 or AP-92-like) as a distinct virus, Aigai virus (AIGV).

View Article and Find Full Text PDF
Article Synopsis
  • The study examined the presence of canine Astrovirus (CAstV), canine Norovirus (canine NoV), and canine Sapovirus (Canine SaV) in saliva and feces of 201 dogs across Greece, utilizing two molecular detection methods.
  • CAstV was detected in 7.5% to 15% of dogs, with higher prevalence found in young asymptomatic dogs; Canine SaV was found in 23% of the samples, while canine NoV was not detected.
  • The results indicate that CAstV and Canine SaV are circulating among Greek dogs, with SYBR-Green Real-time RT-PCR showing superior sensitivity for detection, and the CAstV strain identified through phylogen
View Article and Find Full Text PDF
Article Synopsis
  • * A study examined 150 carbapenem-resistant K. pneumoniae (CRKP) strains from critically ill patients in a Greek hospital, revealing a shift in resistance genes from bla KPC to bla NDM between 2018 and 2021.
  • * The findings indicate that monitoring and strict infection control measures are necessary to combat the increasing prevalence of MDR bacteria, especially in hospital settings.
View Article and Find Full Text PDF
Article Synopsis
  • Since 2010, the West Nile virus (WNV) has been causing annual outbreaks in Greece, particularly affecting human health from May to October.
  • Between 2019 and 2021, over 51,000 Culex pipiens mosquitoes were collected in Central Macedonia, with 5% testing positive for WNV, showing varying infection rates across different regions and years.
  • Whole genome sequencing of 16 virus strains revealed that the WNV lineage 2, introduced in 2019, continued to circulate, providing important data for public health strategies and mosquito control efforts.
View Article and Find Full Text PDF

MicroRNAs (miRNAs) create systems networks and gene-expression circuits through molecular signaling and cell interactions that contribute to health imbalance and the emergence of cardiovascular disorders (CVDs). Because the clinical phenotypes of CVD patients present a diversity in their pathophysiology and heterogeneity at the molecular level, it is essential to establish genomic signatures to delineate multifactorial correlations, and to unveil the variability seen in therapeutic intervention outcomes. The clinically validated miRNA biomarkers, along with the relevant SNPs identified, have to be suitably implemented in the clinical setting in order to enhance patient stratification capacity, to contribute to a better understanding of the underlying pathophysiological mechanisms, to guide the selection of innovative therapeutic schemes, and to identify innovative drugs and delivery systems.

View Article and Find Full Text PDF