Merkel cell polyomavirus infection in childhood: current advances and perspectives.

Merkel cell polyomavirus (MCPyV) is a newly discovered human small, non-enveloped, double-stranded DNA virus, which was classified into the Polyomaviridae family. MCPyV is acquired in early childhood through close contact involving respiratory tract secretions and causes a widespread, previously unrecognised, asymptomatic infection in both immunocompetent children and adults. To date, several researchers have established that MCPyV is the potential causative agent of Merkel cell carcinoma, a relatively rare but life-threatening skin cancer of neuroendocrine origin. In our review, we present current data on the presence of MCPyV DNA in children and address the possible role that the respiratory tract plays in the route of viral transmission. Future studies are required to fully elucidate the potential implications of MCPyV infection in children.

Four historic legends in human papillomaviruses research.

Human papillomaviruses (HPVs) infection and HPVs-associated lesions, including skin warts in children and adults and cervical neoplasia in women, have been excessively studied since ancient years. In our article, we present briefly four major researchers from the HPVs pre-vaccination historic period: Hippokrates the Asclepiad, Domenico Antonio Rigoni-Stern, George N. Papanicolaou and Harald zur Hausen.

Fighting against human papillomavirus: the 25-year old contribution of the University of Crete School of Medicine.

Twenty five years have passed since the first research efforts in Greece on human papillomavirus (HPV) performed by the Department of Clinical Virology at the University of Crete School of Medicine. HPV infection in the human cervix was initially evaluated in relation to the host mutational and transcriptional activation of the ras/raf genes pathway, p53 gene polymorphisms, neo-angiogenesis- related gene expression and G1/S phase transition. A series of epidemiological studies ensued, evaluating HPV infection in the ophthalmic pterygium, benign laryngeal tumors, parotid lesions, nasal polyposis, actinic keratosis, aborted material and non-genital cancers. The observed geographical variations of different HPV types within the Hellenic population indicated a higher prevalence of HPV 18 on the island of Crete compared to mainland Greece. Moreover, our research led to the investigation of the mother-to-infant HPV transmission via human breast milk and the detection of novel HPV types in juvenile recurrent respiratory papillomatosis. We also evaluated the presence of HPV in the respiratory tract of asymptomatic children and the relationship between maternal HPV infection and neonatal prematurity. Despite the introduction of the current prophylactic vaccines against HPV into clinical practice, HPV remains a challenging target for the next generation of researchers, as the war against HPV continues.

Exploring the optimal vaccination strategy against hepatitis B virus in childhood (Review).

Vaccination against hepatitis B virus (HBV) remains the most effective strategy against HBV infection in humans. The present review summarized the optimal vaccination strategies against HBV in childhood. The following points are discussed: i) When and how the first HBV vaccines were developed; ii) the dosages, schedules and injection routes that are used for HBV vaccination; iii) the contraindications for HBV vaccination in the general paediatric population; iv) the challenges with the use of multivalent vaccines; v) the long-term immunogenicity and duration of protection against HBV; vi) the use of selective HBV vaccination and the hepatitis B immune globulin strategy in HBV-exposed infants; and vii) the effectiveness of the current HBV vaccination schemes. The present review is based on a Paediatric Virology Study Group (PVSG) webinar performed in the context of the 8th Workshop on Paediatric Virology.

Challenges and perspectives of palliative medicine: A webinar by the Paediatric Virology Study Group.

Palliative medicine focuses on the quality of life of patients with incurable conditions, who require the adequate relief of physical symptoms, adequate information to make decisions and spiritual wellbeing. Generalist palliative care is provided by family members, general practitioners, care home workers, community nurses and social care providers, as well as non-specialist hospital doctors and nurses. Patients with more complex, physical or psycho-social problems require the shared work of specialized doctors in palliative medicine, nurses, social workers and allied professionals. It is estimated that ~40 million patients require palliative care annually, worldwide; of these, 8 out of 10 patients reside in low- or middle-income countries, and only ~14% are able to access this type of care. Palliative medicine was recognised as a distinct medical specialty in the UK in 1987, with its own specialist curriculum and training pathway, which was recently revised in 2022. The main obstacles that palliative medicine had to overcome in order to be accepted as a separate specialization were the following: i) Defining a unique body of knowledge; ii) standardisation of training; and iii) proving that it warranted being a specialty in its own right. Over the past decade, it has been accepted as more than end-of-life care, supporting patients with an incurable illness at much earlier stages. Given the current absence of specialized palliative care in low- or middle-income countries, as well as the aging population across most European countries and the USA, it is estimated that there may be an increasing need and demand for specialists in palliative medicine in the ensuing years. This article is based on a webinar on palliative medicine, which was performed on October 20, 2022 in the context of the '8th Workshop of Paediatric Virology' organized by the Institute of Paediatric Virology based on the island of Euboea (Greece).

Exploring medical terminology inexpediencies: Tripledemic vs. triple epidemic.

Accurate and consistent medical terminology has a fundamental value in medicine. It enables medical students to understand the meaning of each term, medical physicians to communicate with each other, and it also enables science to adopt a logical language of high-level understanding and scientific regularity. Medical terminology inexpediencies caused by the adoption of etymologically illogical or linguistically false terms lead to misunderstanding and confusion among clinicians. The medical terms epidemic and pandemic are as old as Hippocrates and Sophocles, respectively. The present article evaluates the new medical terms tripledemic and triple epidemic, which were introduced during the recent COVID-19 pandemic.

Navigating paediatric virology through the COVID­19 era (Review).

The present review article presents the key messages of the 8th Workshop on Paediatric Virology organised virtually by the Institute of Paediatric Virology based on the island of Euboea in Greece. The major topics covered during the workshop were the following: i) New advances in antiviral agents and vaccines against cytomegalovirus; ii) hantavirus nephropathy in children; iii) human rhinovirus infections in children requiring paediatric intensive care; iv) complications and management of human adenovirus infections; v) challenges of post­coronavirus disease 2019 (COVID­19) syndrome in children and adolescents; and vi) foetal magnetic resonance imaging in viral infections involving the central nervous system. The COVID­19 era requires a more intensive, strategic, global scientific effort in the clinic and in the laboratory, focusing on the diagnosis, management and prevention of viral infections in neonates and children.

A 3,000-year-old child's toy.

We present the oldest children's toy in Europe, the clay horse of Lefkandi (tenth to ninth century BC), which was found on the western coast of the island of Euboea in Greece. This remarkable 3,000-year-old toy, carrying not a warrior but a pair of amphoras, does not promote violence and it rather enhances creativity, coordination, and an understanding of the mechanics of wheeled vehicles.

Insights in paediatric virology during the COVID-19 era (Review).

The present article provides an overview of the key messages of the topics discussed at the '7th Workshop on Paediatric Virology', which was organised virtually on December 20, 2021 by the Institute of Paediatric Virology, located on the Island of Euboea in Greece. The workshop's plenary lectures were on: i) viral pandemics and epidemics in the ancient Mediterranean; ii) the impact of obesity on the outcome of viral infections in children and adolescents; and iii) COVID-19 and artificial intelligence. Despite the scarcity of evidence from fossils and remnants, viruses have been recognised as significant causes of several epidemics in the ancient Mediterranean. Paediatric obesity, a modifiable critical health risk factor, has been shown to impact on the development, progression and severity of viral infections. Thus, the prevention of paediatric obesity should be included in formulating public health policies and decision-making strategies against emerging global viral threats. During the current COVID-19 pandemic, artificial intelligence has been used to facilitate the identification, monitoring and prevention of SARS-CoV-2. In the future, it will play a fundamental role in the surveillance of epidemic-prone infectious diseases, in the repurposing of older therapies and in the design of novel therapeutic agents against viral infections. The collaboration between different medical specialties and other diverse scientific fields, including archaeology, history, epidemiology, nutritional technologies, mathematics, computer technology, engineering, medical law and ethics is essential for the successful management of paediatric viral infections. The current COVID-19 pandemic has underscored this need, which should be further encouraged in modern medical education.

Can 'high-risk' human papillomaviruses (HPVs) be detected in human breast milk?

AIM: Human papillomavirus (HPV) transmission via nonsexual modes in childhood has been proposed by several researchers. The aim of our study was to determine the presence of 'high-risk' HPV DNA in human breast milk. METHODS: Using polymerase chain reaction techniques, we evaluated the presence of HPV infection in human breast milk collected from 21 HPV-positive and 11 HPV-negative mothers. RESULTS: Of the 32 studied human milk specimens, no 'high-risk' HPV 16, 18, 31, 33, 35, 39, 45, 51, 52, 56, 58 or 58 DNA was detected. CONCLUSION: This preliminary case-control study indicates the absence of mucosal 'high-risk' HPV types in human breast milk.

Novel human papilloma virus (HPV) genotypes in children with recurrent respiratory papillomatosis.

INTRODUCTION: Recurrent respiratory papillomatosis (RRP) is characterized by the presence of benign virally induced tumors of the larynx and respiratory epithelium that may obstruct the airway and tend to recur frequently. RRP is caused by the human papilloma virus (HPV), most frequently by HPV types 6 and 11. In this study, we present four cases of children with RRP in whom HPVs other than HPV-6 or HPV-11 were found. MATERIAL AND METHODS: In all four cases, HPV typing was performed by polymerase chain reaction (PCR) followed by restriction digestion (RFLP) in biopsy samples collected during surgery. RESULTS: In the first case, simultaneous HPV infection with types 13 and 39 was detected, while in the second case HPV-40 and HPV-56 were found. In cases 3 and 4, the biopsy samples were positive for unidentified 'low-risk' HPVs. CONCLUSIONS: The presence of novel HPV genotypes in children with RRP emphasizes the need for further investigation of the implication of these genotypes in the disease.

Retinopathy of prematurity and neonatal gut microbiome: An interview with Professor Dimitra Skondra, Associate Professor of Ophthalmology and Vitreoretinal Surgeon at The University of Chicago (USA).

Retinopathy of prematurity (ROP) is a sight-threatening disorder of the retina affecting neonates of very low birth weight and gestational age, and is characterized by the development of abnormal blood vessel growth. According to Dr Dimitra Skondra, Associate Professor of Ophthalmology and Vitreoretinal Surgeon at the University of Chicago School of Medicine in Chicago, USA, the neonatal gut microbiome may be implicated in the neoangiogenesis process in the neonatal retina and this role may be one of the missing links in the pathogenesis of ROP. The human gut microbiome consists of bacteria, viruses, protozoa and fungi, which colonize the sterile fetal intestine, and differ depending on gestational age, mode of delivery, type of neonatal feeding, the usage of antibiotics and the requirement of neonatal intensive care. To date, it has been related to multiple nutritive, metabolic and immunological functions and has been implicated in the pathogenesis of several human diseases, such as the inflammatory bowel diseases, autoimmune and neurogenerative disorders, metabolic syndrome, cardiovascular diseases and various types of malignant neoplasias. Recent research has proposed that the neonatal gut microbiome profile in high-risk neonates who develop ROP is significantly enriched with Enterobacteriacaea species several weeks prior to the diagnosis of ROP. Further research using animal models is required to prove the causative or secondary role of the microbiome composition in the development and clinical course of ROP. If this role is proven, the gut microbiome could then be a target of intervention for personalized medicine in the prevention and therapeutic management of ROP in neonates.

The challenge of paediatric epilepsy nursing: An interview with Mrs. Jenny O'Brien, paediatric epilepsy nursing specialist at the Wirral University Teaching Hospital, UK.

Epilepsy in childhood is one of the most common neurological disorders encountered in paediatric clinical practice. The current treatment of paediatric epilepsy aims to improve health outcomes, as well as to manage the educational, social and psychological issues that are involved in the quality of life of paediatric patients and their parents. In this direction, in several countries, a specialized, comprehensive, multidisciplinary service has been developed, including paediatric epilepsy nursing, which constitute a key component of this service. According to Mrs. Jennifer O'Brien, one of the pioneering paediatric epilepsy nursing specialists in the UK with a significant contribution in the care of children with epilepsy in Merseyside, the mission of paediatric epilepsy nursing is to enable children with epilepsy and their families to live as normal a life as possible, to ensure that all those who care for the child are well-educated regarding the child's epilepsy and to promote the child's safety and integration into society. She notes that in the past, epilepsy was not considered as a specialty and was looked after by all paediatricians; it is recognised now that it is an incredibly complex group of conditions, which deserves to have specialist management. She believes that although modern technology is crucial in informing and educating families, face to face education and advice is still the most important method of providing support. She highlights the recent advances in genetics of paediatric neurology along with the drive for epilepsy specialists, both nursing and medical, while she estimates that over the following years, paediatric epilepsy nursing will have progressed beyond nowadays expectations.

COVID-19 and paediatric challenges: An interview with Professor of Paediatrics Vana Papaevangelou (University of Athens School of Medicine).

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is a novel coronavirus, which causes coronavirus disease 2019 (COVID-19) and affects children less frequently than adults. According to Professor Vana Papaevangelou, Professor of Paediatrics at the University of Athens School of Medicine, children comprise only 2-6% of COVID-19 cases, worldwide, and they are not considered as super-spreaders of this infection. SARS-CoV-2 is transmitted through droplets, fomites, aerosol and fecal-oral route, while there is no strong evidence as yet, supporting transplacental transmission. Professor Papaevangelou highlights the epidemiological differences between seasonal influenza and COVID-19 and accepts that school closure had no direct impact since children are not the main transmitters of SARS-CoV-2. On the other hand, social distancing clearly limited the transmission of SARS-CoV-2, while quarantine seemed necessary during the first wave of this pandemic. She refers to antivirals, as well as other therapeutic agents able to diminish the immune response producing multisystem inflammatory syndrome, which is associated with increased mortality, and she notes that these agents were rarely used in children with COVID-19, while in most cases supportive treatment sufficed. She finishes with the ongoing scientific efforts for the development of an effective and safe vaccine against SARS-CoV-2 indicating that so far the most promising vaccine developments include vaccines that use viral vectors.

Creating the 'George N. Papanicolaou Medal' by the Academy of Athens: An interview with Professor of Sculpture Theodoros Papagiannis (Athens School of Fine Arts, Athens, Greece).

The 'George N. Papanicolaou Medal' is a brass medal commissioned by the Academy of Athens on the occasion of the 100th anniversary of the birth of Dr George N. Papanicolaou in 1983. It was created by Professor Theodoros Papagiannis, Professor Emeritus of Sculpture at the Athens School of Fine Arts in Athens, Greece; the medal presents Dr George N. Papanicolaou with his microscope. According to Professor Papagiannis, the medal was requested by Professor Nikolaos Louros, Emeritus Professor of Obstetrics and Gynecology at the University of Athens School of Medicine and it was created according to the ancient Greek style. The medal was given to all honored participants of the special ceremony organized by the Academy of Athens in May 13th, 1983, in the context of the 100 years from the birth of Dr George N. Papanicolaou. The ceremony was performed at the Central Hall of the Academy of Athens in Athens under the auspices of the President of the Hellenic Democracy Constantinos Caramanlis. A copy of this medal is being exhibited at the 'Museum of Contemporary Sculpture Theodoros Papagiannis' in Elliniko at the Municipality of Katsanochoria close to Ioannina (Greece), as well as at the newly founded Institute of Paediatric Virology based on the island of Euboea, birth place of Dr George N. Papanicolaou.