Suspected tick-borne flavivirus meningoencephalomyelitis in dogs from the UK: six cases (2021).

OBJECTIVES: Tick-borne encephalitis virus and louping ill virus are neurotropic flaviviruses transmitted by ticks. Epidemiologically, tick-borne encephalitis is endemic in Europe whereas louping ill's predominant geographical distribution is the UK. Rarely, these flaviviruses affect dogs causing neurological signs. This case series aimed to describe the clinical, clinicopathological, and imaging findings, as well as the outcomes in six dogs with meningoencephalitis and/or meningomyelitis caused by a flavivirus in the UK in 2021. MATERIALS AND METHODS: Observational retrospective case-series study. Clinical data were retrieved from medical records of dogs with positive serological or immunohistochemical results from three different institutions from spring to winter 2021. RESULTS: Six dogs were included in the study. All dogs presented an initial phase of pyrexia and/or lethargy followed by progressive signs of spinal cord and/or intracranial disease. Magnetic resonance imaging showed bilateral and symmetrical lesions affecting the grey matter of the thalamus, pons, medulla oblongata, and thoracic or lumbar intumescences with none or mild parenchymal and meningeal contrast enhancement. Serology for tick-borne encephalitis virus was positive in five dogs with the presence of seroconversion in two dogs. The viral distinction between flaviviruses was not achieved. One dog with negative serology presented positive immunohistochemistry at post-mortem examination. Three dogs survived but presented neurological sequelae. Three dogs were euthanased due to the rapid progression of the clinical signs or static neurological signs. CLINICAL SIGNIFICANCE: These cases raise awareness of the presence of tick-borne encephalitis as an emergent disease or the increased prevalence of louping ill virus affecting dogs in the UK.

Evaluation of Efficacy and Safety of EstroG-100® in Alleviating Menopausal Symptoms in Postmenopausal Women in India: A Prospective, Single-center, Single-arm, Interventional Study.

Background: Menopause is a natural stage in a woman's life marked by the cessation of menstrual periods. Common symptoms include hot flashes, mood swings, and vaginal discomfort, among others. These climacteric symptoms lead to a compromised quality of life affecting physical, biological, psychological, and social well-being. There are concerns with long-term clinical use of Hormone replacement therapy (HRT) and alternative therapies that are devoid of adverse risks are required. This study aimed to evaluate the safety and efficacy of EstroG-100®, containing a mixture of standardized extracts of Cynanchum wilfordii, Phlomis umbrosa, and Angelica gigas, on menopausal symptoms and its impact on quality of life. Methodology: This was a prospective, single-center, single-arm, interventional study. Sixty female subjects, with confirmed menopause and moderate-to-severe symptoms, were enrolled and treated with EstroG-100® twice daily, for 12 weeks. Improvement in the climacteric symptoms was evaluated using the Menopause Rating Scale-11 and Menopause Symptoms Treatment Satisfaction Questionnaire (MS-TSQ). All the results were evaluated by the SPSS software version 23.0. Results: A significant improvement was noticed in the somatic, urogenital, and psychological climacteric symptoms from baseline to 6 weeks (P = 0.001) and a highly significant improvement after 12 weeks (P = 0.0001) of treatment. 96.5% of patients were satisfied with the treatment outcome evaluated by the MS-TSQ. No changes in blood pressure and body mass index were reported. No side effects were reported during the study. Conclusion: The first study of EstroG-100® in Indian menopausal women demonstrated a statistically significant improvement in climacteric symptoms. A 12-week treatment proved safe and effective in enhancing postmenopausal women's quality of life. The remedy was well-tolerated and effectively alleviated menopausal symptoms.

Views on artificial intelligence (AI) assisted clinical trials.

It is of interest to document the views of medical professionals on the application of artificial intelligence (using known data for the prediction of unknown events) in clinical trials using a web survery with a structured questionnaire from 377 subjects. The questionnaire contained 17 statements which were categorised into awareness (1,2 statements), perception (3-10 statements) and opinion (11-17 statements). The data obtained was compared between the subjects using two tailed Fisher's exact test with p-value <0.05 for data significance analysis. Data shows that majority of professionals have possitive views on the application of artificial intelligence in clinical trials. This will accelarrate the drug evaluation process. However, the use of emerging tools such as AI will not replace human subjects in this context.

C7 vertebra homeotic transformation in domestic dogs - are Pug dogs breaking mammalian evolutionary constraints?

The number of cervical vertebrae in mammals is almost constant at seven, regardless of their neck length, implying that there is selection against variation in this number. Homebox (Hox) genes are involved in this evolutionary mammalian conservation, and homeotic transformation of cervical into thoracic vertebrae (cervical ribs) is a common phenotypic abnormality when Hox gene expression is altered. This relatively benign phenotypic change can be associated with fatal traits in humans. Mutations in genes upstream of Hox, inbreeding and stressors during organogenesis can also cause cervical ribs. The aim of this study was to describe the prevalence of cervical ribs in a large group of domestic dogs of different breeds, and explore a possible relation with other congenital vertebral malformations (CVMs) in the breed with the highest prevalence of cervical ribs. By phenotyping we hoped to give clues as to the underlying genetic causes. Twenty computed tomography studies from at least two breeds belonging to each of the nine groups recognized by the Federation Cynologique Internationale, including all the brachycephalic 'screw-tailed' breeds that are known to be overrepresented for CVMs, were reviewed. The Pug dog was more affected by cervical ribs than any other breed (46%; P < 0.001), and was selected for further analysis. No association was found between the presence of cervical ribs and vertebral body formation defect, bifid spinous process, caudal articular process hypoplasia/aplasia and an abnormal sacrum, which may infer they have a different aetiopathogenesis. However, Pug dogs with cervical ribs were more likely to have a transitional thoraco-lumbar vertebra (P = 0.041) and a pre-sacral vertebral count of 26 (P < 0.001). Higher C7/T1 dorsal spinous processes ratios were associated with the presence of cervical ribs (P < 0.001), supporting this is a true homeotic transformation. Relaxation of the stabilizing selection has likely occurred, and the Pug dog appears to be a good naturally occurring model to further investigate the aetiology of cervical ribs, other congenital vertebral anomalies and numerical alterations.

A review of canine atlantoaxial joint subluxation.

Atlantoaxial subluxation was first reported in dogs nearly fifty years ago. Since that time a better understanding of the aetiologies predisposing to joint laxity and instability has been achieved. Surgeons however are still trying to address the problems associated with stabilizing this joint which by nature is often required in small juvenile dogs. This review describes the various techniques used, discussing the associated benefits and complications thereby allowing the clinician to make an informed decision on the best treatment for the individual patient.

Comparison of two regimens for the treatment of meningoencephalomyelitis of unknown etiology.

BACKGROUND: The optimal treatment for meningoencephalomyelitis of unknown etiology (MUE) remains unknown, despite the widespread use of a variety of immunosuppressive drugs. OBJECTIVE/HYPOTHESIS: To compare the efficacy of prednisolone combined with either vincristine and cyclophosphamide (COP group; n= 10) or with cytosine arabinoside (AraC group; n= 9). ANIMALS: Nineteen dogs with neurological deficits, neuroimaging, and cerebrospinal fluid abnormalities consistent with a diagnosis of MUE. METHODS: Prospective, blinded, and randomized clinical trial. Dogs fulfilling the inclusion criteria were randomly allocated to receive 1 drug regimen. RESULTS: Four of 10 dogs in the COP group and 5/9 in the AraC group survived > 12 months but neither the survival time nor the time-to-treatment failure differed between the 2 groups. Treatment with COP resulted in an unacceptable incidence of adverse effects. CONCLUSIONS: The adverse effects of COP make it an unsuitable treatment for MUE. Although survival of animals treated with AraC was broadly similar to that reported in recently published studies describing this treatment, it remains unclear whether it confers any benefit over using prednisolone alone.

Thoracic stenosis causing lateral compression of the spinal cord in two immature Dogues de Bordeaux.

This case report describes a novel developmental vertebral malformation in two young Dogues de Bordeaux, which was diagnosed by magnetic resonance imaging. Both dogs were treated surgically with reasonable success.