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1.
Sex Transm Infect ; 99(8): 548-551, 2023 12.
Article in English | MEDLINE | ID: mdl-37536929

ABSTRACT

OBJECTIVES: A global outbreak of mpox (monkeypox) has been ongoing since 2022, with most cases in the UK detected in gay, bisexual and other men who have sex with men (GBMSM). Asymptomatic and pauci-symptomatic mpox infection has been reported outside of the UK. We aimed to investigate whether mpox could be detected in specimens from GBMSM in England who were attending sexual health services (SHSs) for asymptomatic sexually transmitted infection screening. METHODS: Anonymised, residual clinical specimens from GBMSM undertaking routine asymptomatic screening for gonorrhoea (Neisseria gonorrhoeae (NG)) and chlamydia (Chlamydia trachomatis (CT)) infection were tested for the presence of mpox virus. Specimens were collected between 1 August and 7 October 2022 from three SHSs in high-mpox incidence areas in England. Testing was performed using a dual-clade, mpox virus-specific real-time PCR. RESULTS: During the collection period, 2927 clinical specimens (951 pharyngeal swabs, 1022 urine specimens and 954 rectal swabs) were obtained from 1159 GBMSM. Mpox virus was detected in four specimens from two participants who attended the same SHS at different times (the first during the week 8-12 of August, the second during the week 19-23 of September). One participant was positive in the urine specimen only, while the other tested positive at all three sites. CONCLUSIONS: A very low prevalence (2 of 1159, 0.17%) of mpox infection was detected in GBMSM attending SHS in England for asymptomatic NG/CT screening, suggesting that undetected infection in this population was unlikely to be a main driver of transmission. Confirmed mpox cases in the UK declined from over 1100 per month in June and July to 764 cumulatively during the collection period. These data give reassurance that the observed reduction in cases during the collection period was not due to undetected infection or changes in presentation among SHS attendees. Currently, there is insufficient evidence to support routine testing of asymptomatic GBMSM for mpox infection in England.


Subject(s)
Chlamydia Infections , Gonorrhea , Mpox (monkeypox) , Sexual and Gender Minorities , Male , Humans , Homosexuality, Male , Monkeypox virus , Retrospective Studies , Gonorrhea/diagnosis , Gonorrhea/epidemiology , Neisseria gonorrhoeae , Chlamydia Infections/diagnosis , Chlamydia Infections/epidemiology , Chlamydia Infections/urine , Chlamydia trachomatis , England/epidemiology
2.
Schizophr Res ; 252: 225-230, 2023 02.
Article in English | MEDLINE | ID: mdl-36681045

ABSTRACT

Among children with psychotic-like experiences (PLEs), the presence of co-occurring psychopathology may distinguish children's self-report of clinically significant experiences (i.e., PLEs that are distressing and/or impairing of daily functioning) from reports of more benign experiences. The aim of this study was to examine whether the likelihood of distressing or impairing PLEs differed according to type of co-occurring psychopathology symptoms. A community sample of 5268 children aged 9-12 years were recruited from Greater London, UK. Participants completed the Psychotic-Like Experiences Questionnaire for Children, and the Strengths and Difficulties Questionnaire to measure internalising and externalising problems. Multinomial logistic regressions were used to determine the likelihood of PLEs being distressing and/or impairing (vs. not) among children with different co-occurring symptom profiles (PLEs only; PLEs with internalising problems only - PLE-I; PLEs with externalising problems only - PLE-E; and PLEs with both internalising and externalising problems - PLE-IE). Children with co-occurring internalising and/or externalising problems had greater odds of distressing and/or impairing PLEs compared to children without co-occurring psychopathology (PLEs only). These associations were moderate for PLE-E and strong for PLE-I and PLE-IE, with the greatest odds of distressing and impairing PLEs evident in the presence of internalising plus externalising comorbidities (odds ratios [with 99 % confidence intervals] for PLE-IE relative to PLE-I = 2.00 [1.34-2.99]; PLE-IE relative to PLE-E = 5.46 [3.78-7.90]). These results affirm the importance of screening for the presence and type of co-occurring psychopathology among children with PLEs to demarcate potentially different treatment needs.


Subject(s)
Mental Disorders , Psychotic Disorders , Humans , Child , Psychotic Disorders/diagnosis , Psychopathology , Self Report , Surveys and Questionnaires
3.
Child Psychiatry Hum Dev ; 54(2): 421-435, 2023 04.
Article in English | MEDLINE | ID: mdl-34586552

ABSTRACT

Child maltreatment rates remain unacceptably high and rates are likely to escalate as COVID-related economic problems continue. A comprehensive and evidence-building approach is needed to prevent, detect and intervene where child maltreatment occurs. This review identifies key challenges in definitions, overviews the latest data on prevalence rates, reviews risk and protective factors, and examines common long-term mental health outcomes for children who experience maltreatment. The review takes a systems approach to child maltreatment outcomes through its focus on the overall burden of disease, gene-environment interactions, neurobiological mechanisms and social ecologies linking maltreatment to mental ill-health. Five recommendations relating to the accurate measurement of trends, research on brain structures and processes, improving the reach and impact of teleservices for detecting, preventing and treating child maladjustment, community-based approaches, and building population-focused multidisciplinary alliances and think tanks are presented.


Subject(s)
COVID-19 , Child Abuse , Mental Disorders , Child , Humans , Mental Health , COVID-19/prevention & control , Child Abuse/prevention & control , Child Abuse/psychology , Mental Disorders/epidemiology , Mental Disorders/prevention & control , Prevalence
4.
J Relig Health ; 62(2): 1136-1156, 2023 Apr.
Article in English | MEDLINE | ID: mdl-35286561

ABSTRACT

This study examined associations between school sector (Government, Catholic or Independent) and depressive symptomology over the secondary school years. Six waves of data collected annually from a representative Australian sample were examined. Multilevel piecewise linear and logistic regression controlling for a variety of demographic variables and protective factors was undertaken. In all sectors, depressive symptomology decreased between 10 and 13 years of age, but significantly increased for girls at age 13. Adolescents in Catholic schools reported significantly fewer symptoms of depression compared to those in Government and Independent schools. Adolescents in Catholic schools were less likely to report clinical levels of depressed mood compared to adolescents in Government schools.


Subject(s)
Catholicism , Depression , Female , Humans , Adolescent , Victoria/epidemiology , Longitudinal Studies , Depression/epidemiology , Depression/diagnosis , Schools , Government
6.
J Autism Dev Disord ; 53(9): 3627-3635, 2023 Sep.
Article in English | MEDLINE | ID: mdl-35829944

ABSTRACT

The Questionnaire for Autism Spectrum Conditions (Q-ASC; Attwood, Garnett & Rynkiewicz, 2011) is one of the few screening instruments that includes items designed to assess female-specific ASD-Level 1 traits. This study examined the ability of a modified version of the Q-ASC (Q-ASC-M; Ormond et al., 2018) to differentiate children with and without ASD-Level 1. Participants included 111 parents of autistic children and 212 parents of neurotypical children (5-12 years). Results suggested that the gendered behaviour, sensory sensitivity, compliant behaviours, imagination, and imitation subscales differentiated autistic females from neurotypical females. Compared to autistic males, autistic females had higher scores on gendered behaviour, sensory sensitivity, social masking, and imitation. Results are discussed in relation to early detection of autistic female children.


Subject(s)
Autism Spectrum Disorder , Sex Characteristics , Surveys and Questionnaires , Child , Child, Preschool , Female , Humans , Male , Autism Spectrum Disorder/diagnosis , Autism Spectrum Disorder/psychology , Case-Control Studies , Cross-Sectional Studies , Early Diagnosis , Follow-Up Studies , Friends , Imagination , Imitative Behavior , Logistic Models , Missed Diagnosis/prevention & control , Missed Diagnosis/psychology , Missed Diagnosis/statistics & numerical data , Parents , Play and Playthings , Sex Factors , Social Behavior , Surveys and Questionnaires/standards
7.
JMIR Pediatr Parent ; 5(4): e35240, 2022 Oct 24.
Article in English | MEDLINE | ID: mdl-36279160

ABSTRACT

BACKGROUND: Problematic internet use (PIU) is prevalent among Chinese adolescents. There is a need to better understand how the quality of parent-adolescent relationship is associated with adolescent PIU to guide the development of effective prevention and early intervention programs. OBJECTIVE: This study aims to evaluate parent-adolescent conflict and parenting styles as potential risk factors associated with adolescent PIU. METHODS: A sample of 6552 students (aged 10-19 years) from 22 schools in Guangdong, China, was recruited. The participants completed self-report questionnaires measuring their perceptions of conflict with their parents (involving verbal conflict, emotional abuse, and physical abuse) as well as their perceptions of their parents' parenting styles (including parental care and parental control as measured by the Parental Bonding Inventory), and PIU using the Adolescent Pathological Internet Use Scale. Grade level and gender were examined as moderators of these associations. RESULTS: Using multiple regression analyses, we found that greater mother-adolescent conflict, father-adolescent conflict, and parental control, and lower levels of parental care, were associated with higher levels of adolescent PIU (P<.001). The association between mother-adolescent conflict and PIU was stronger in older students than in younger students (P=.04), whereas the association between father-adolescent conflict and PIU was stronger in male students than in female students (P=.02). Compared with those who reported no mother-adolescent conflict, participants who experienced verbal conflict and emotional abuse, but not physical abuse from their mothers, reported higher levels of PIU (P<.001). Compared with those who reported no father-adolescent conflict, participants who experienced verbal conflict, emotional abuse, and physical abuse from their fathers had significantly higher levels of PIU (P<.001, P<.001, and P=.02, respectively). CONCLUSIONS: These findings point to the value of interventions to reduce parental verbal conflict, emotional abuse, and physical abuse, and to increase positive parenting styles, to lower the risk of PIU in Chinese adolescents.

8.
ACS Appl Bio Mater ; 5(8): 3972-3981, 2022 08 15.
Article in English | MEDLINE | ID: mdl-35905450

ABSTRACT

Adsorption and controlled release of agrochemicals has been studied widely using different nanomaterials and a variety of formulations. However, the potential for application of high surface-area metal-organic frameworks (MOFs) for the controlled release of agrochemicals has not been thoroughly explored. Herein, we report controlled and sustainable release of a widely used herbicide (2-methyl-4-chlorophenoxyacetic acid, MCPA) via incorporation in a range of zirconium-based MOFs and their biodegradable polymer composites. Three Zr-based MOFs, viz., UiO-66, UiO-66-NH2, and UiO-67 were loaded with MCPA either postsynthetically or in situ during synthesis of the MOFs. The MCPA-loaded MOFs were then incorporated into a biodegradable polycaprolactone (PCL) composite membrane. All three MOFs and their PCL composites were thoroughly characterized using FT-IR, TGA, SEM, PXRD, BET, and mass spectrometry. Release of MCPA from each of these MOFs and their PCL composites was then studied in both distilled water and in ethanol for up to 72 h using HPLC. The best performance for MCPA release was observed for the postsynthetically loaded MOFs, with PS-MCPA@UiO-66-NH2 showing the highest MCPA concentrations in ethanol and water of 0.056 and 0.037 mg/mL, respectively. Enhanced release of MCPA was observed in distilled water when the MOFs were incorporated in PCL. The concentrations of herbicides in the release studies provide us with a range of inhibitory concentrations that can be utilized depending on the crop, making this class of composite materials a promising new route for future agricultural applications.


Subject(s)
2-Methyl-4-chlorophenoxyacetic Acid , Herbicides , Metal-Organic Frameworks , Delayed-Action Preparations , Ethanol , Herbicides/chemistry , Metal-Organic Frameworks/chemistry , Phthalic Acids , Polymers , Spectroscopy, Fourier Transform Infrared , Water , Zirconium/chemistry
9.
ACS Omega ; 7(23): 19113-19121, 2022 Jun 14.
Article in English | MEDLINE | ID: mdl-35722025

ABSTRACT

With good insulation, cross-linked polyethylene (XLPE) cables are widely used as an important basic material for power transportation. Due to being insoluble and infused, the cross-linked network structure caused a challenge in the recycling of waste XLPE, which is usually treated by incineration and landfilling. In this research, XLPE was part-de-cross-linked via solid-state shear milling (S3M) technology, but the resulting powder was difficult to process. In order to improve the re-processability of XLPE, asphalt with a similar structure was added during the thermoplastic processing. To deeply understand the influence of asphalt on the matrix, the compatibility, dispersion, and rheological properties of the composites were characterized. Due to the good compatibility between de-cross-linked XLPE and asphalt, the viscosity of the composites decreased significantly. Some sea-island structures also formed in composites, which increased the toughness of the composites, so the elongation at break reached as high as 322%. The use of asphalt to achieve the processing performance of part-de-cross-linked XLPE powder was highly effective. Furthermore, the prepared composites showed potential application in the field of waterproofing, which could recycle waste XLPE cables on a large scale.

10.
Bioengineering (Basel) ; 9(4)2022 Apr 06.
Article in English | MEDLINE | ID: mdl-35447723

ABSTRACT

Healthcare applications are known to have a considerable environmental impact and the use of bio-based polymers has emerged as a powerful approach to reduce the carbon footprint in the sector. This research aims to explore the suitability of using a new sustainable polyester blend (Floreon™) as a scaffold directed to aid in musculoskeletal applications. Musculoskeletal problems arise from a wide range of diseases and injuries related to bones and joints. Specifically, bone injuries may result from trauma, cancer, or long-term infections and they are currently considered a major global problem in both developed and developing countries. In this work we have manufactured a series of 3D-printed constructs from a novel biopolymer blend using fused deposition modelling (FDM), and we have modified these materials using a bioceramic (wollastonite, 15% w/w). We have evaluated their performance in vitro using human dermal fibroblasts and rat mesenchymal stromal cells. The new sustainable blend is biocompatible, showing no differences in cell metabolic activity when compared to PLA controls for periods 1-18 days. FloreonTM blend has proven to be a promising material to be used in bone tissue regeneration as it shows an impact strength in the same range of that shown by native bone (just under 10 kJ/m2) and supports an improvement in osteogenic activity when modified with wollastonite.

11.
Prev Sci ; 23(1): 24-35, 2022 01.
Article in English | MEDLINE | ID: mdl-34626325

ABSTRACT

Internationally, youth crime is a significant social problem. Violent youth crime has been rising over the past decade in the state of Victoria, Australia. Communities That Care (CTC) is a coalition training process designed to prevent youth crime. There has been limited evaluation outside the USA. Using a non-experimental design, this study employed official state crime statistics to evaluate the impact on crime as the five-phase CTC process was implemented between 2010 and 2019 across communities in Victoria. The standard five-phase CTC implementation cycle was supplemented with universal programs to reduce sales and supply of alcohol to underage youth (under 18 years). Growth models evaluated community trends in youth crime (all, person, property and deception and other), comparing communities that implemented CTC at phase 4 or greater with communities that had not implemented CTC. In accord with the hypotheses, the study found significant reductions in crimes associated with CTC over the period between 2010 and 2019. A 2% annual reduction in risk was observed for crimes against persons for all age groups (IRR = 0.98, 95% CI [0.96, 0.998]). A 5% annual reduction was observed for crimes of property and deception for adolescents aged between 10 and 17 years (IRR = 0.95, 95% CI [0.90, 0.99]). These findings support CTC as an intervention for preventing youth crime at a population level. Future studies should evaluate intervention mechanisms and economic benefits.


Subject(s)
Adolescent Behavior , Crime , Adolescent , Child , Crime/prevention & control , Humans , Victoria
12.
Prev Sci ; 23(1): 36-47, 2022 01.
Article in English | MEDLINE | ID: mdl-34714508

ABSTRACT

Despite a decline in Australian adolescents reporting to have consumed alcohol, a high proportion of the adolescent population still consumes alcohol. Community-led prevention interventions that systematically and strategically implement evidence-based programs have been shown to be effective in producing population-behaviour change related to youth alcohol and drug use. This study evaluated the post-intervention effects of a multi-component community intervention in Australia. It comprised social marketing targeting adolescents and parents, and a community intervention to reduce underage alcohol sales. Structural equation modelling was used to examine direct and indirect effects of community intervention components on intention and consumption. Self-report surveys (N = 3377) and community sales data (27 communities) were analysed to evaluate the effect of the intervention components on intention and consumption before the age of 18. The intervention reduced alcohol sales to minors (OR = .82). Exposure to the social marketing was significantly associated with household no-alcohol rules (OR = 2.24) and parents not supplying alcohol (OR = .72). The intervention predicted intention not to consume alcohol before age 18; intention was associated with not consuming alcohol (OR = 5.70). Total indirect effects from the intervention through to intention were significant. However, parents setting a rule and not supplying alcohol were the only significant direct effects to intention. Parents setting a rule was directly associated with lower consumption. Overall, the intervention logic was supported by the data modelling. The study extends prior knowledge of community-based interventions to prevent adolescent alcohol use by identifying critical intervention components and effect mechanisms. ClinicalTrials.gov Identifier: ACTRN12612000384853.


Subject(s)
Underage Drinking , Adolescent , Alcohol Drinking/prevention & control , Australia/epidemiology , Commerce , Humans , Parents , Social Marketing , Underage Drinking/prevention & control
13.
J Adolesc ; 91: 15-24, 2021 08.
Article in English | MEDLINE | ID: mdl-34271292

ABSTRACT

INTRODUCTION: Internationally, the prevalence of young adult homelessness is concerning. Few data on life-course predictors from longitudinal studies exist, limiting our capacity to inform prevention strategies at the population-level. METHODS: Data were drawn from a state representative population-based sample of young adults from Victoria, Australia participating in the International Youth Development Study (IYDS; N = 927, 54% female). Participants were recruited in state-representative secondary school samples at Grade 7 (age 13, 2002), with follow-up in Grades 9 (age 15) and 11 (age 17) and at ages 21, 23 and 25. Using longitudinal path modelling, we conducted a series of analyses testing life-course predictors of young adult homelessness across multiple socializing contexts, and the interrelationships among them. RESULTS: The rate of young adult homelessness was 5.5%. Path modelling showed higher levels of family conflict at ages 13 and 15 uniquely predicted homelessness by age 25. This effect remained after accounting for other risk factors in peer-group (e.g., interactions with antisocial peers), school (e.g., low academic performance), and community contexts (e.g., low neighborhood attachment). Peer drug use and interaction with antisocial peers at age 15 mediated the association between family conflict at age 13 and homelessness by age 25. CONCLUSIONS: Findings point to the vulnerability of early adolescents to family conflict. This vulnerability heightens risk for young adult homelessness. Findings strengthen the case for both primary prevention programs that build healthy relationships between family members from early on in adolescence and for investment in homelessness prevention at key developmental periods.


Subject(s)
Ill-Housed Persons , Adolescent , Adult , Antisocial Personality Disorder , Cohort Studies , Female , Humans , Male , Peer Group , Victoria , Young Adult
14.
Int J STD AIDS ; 32(11): 1036-1042, 2021 10.
Article in English | MEDLINE | ID: mdl-33978539

ABSTRACT

Maximising opportunities and removing barriers to HIV testing can help reduce the undiagnosed HIV population. Digital STI/HIV screening services have increased in availability and can improve access and testing coverage. We identified the characteristics of individuals who tested HIV positive using a regional, integrated, self-sampling STI service. The e-notes of service users with reactive HIV screening results were reviewed. Between 8 January 2018 and 31 December 2019, 0.097% (144/148,257) users received a reactive HIV result, 30/144 (20.8%) of whom had previously diagnosed HIV infection. All of the remaining 114 users were notified of their screening result, an estimated 109/114 (95.6%) received confirmatory testing (CT) at a sexual health clinic (SHC) and the confirmatory outcome was documented in 102/114 (89.5%) of cases: 34/114 (29.8%)were HIV positive, 68/114 (59.6%) HIV were negative and the result was unknown in 12/114 (10.5%). All new diagnoses transitioned to HIV outpatient care. These individuals were median age 28 years; 94.1% (32/34) male; 88.2% (30/34) men who have sex with men and 11.8% (4/34) heterosexual; 58.8% (20/34) of white/'white other' ethnicity and 42.2% of Black, Asian and minority ethnic group; 50%(17/34) had a concurrent STI; 9% and 21% had never tested for HIV or attended a SHC before. n HIV test reactivity rate of 0.1%(95% CI) was observed. Confirmed new HIV diagnoses comprised 0.023% of all HIV tests performed. All individuals where CT confirmed a new HIV diagnosis transitioned to HIV specialist care.


Subject(s)
HIV Infections , Sexual and Gender Minorities , Sexually Transmitted Diseases , Adult , HIV Infections/diagnosis , HIV Infections/epidemiology , Homosexuality, Male , Humans , London , Male , Mass Screening , Sexually Transmitted Diseases/diagnosis , Sexually Transmitted Diseases/epidemiology
16.
PLoS One ; 16(3): e0248600, 2021.
Article in English | MEDLINE | ID: mdl-33760872

ABSTRACT

The potential for adolescent mental health problems arising from heavy internet use is significant. There is a need to better understand the risk and protective factors related to problematic internet use (PIU) amongst adolescents. This study examined the role of adolescents' perceptions of school-based relationships as potential contextual antecedents to problematic internet use. Specifically, 6552 adolescent students (55.9% boys, 13.51 ± 2. 93 years) from 22 primary and middle schools in southern China completed questionnaires to measure the degree of adolescent conflict with peers, teachers and other staff, school connectedness, perceived classroom atmosphere and problematic internet use. Self-reported data was collected using a two-level stratified sampling. Multiple regression analyses showed that conflict with peers and teachers was positively associated with higher levels of PIU, while school connectedness and perceived classroom atmosphere were negatively associated with PIU. An interaction effect was found for conflict with peers and grade level, such that the association between conflict with peers and PIU was stronger for secondary students compared to primary school students. The results support the need for school-based interventions for PIU to include a focus on conflict with peers and teachers, and for a focus on the enhancement of school connectedness and classroom atmosphere.


Subject(s)
Adolescent Behavior/psychology , Behavior, Addictive/psychology , Conflict, Psychological , Internet Use , Students/psychology , Adolescent , Adult , Child , China , Female , Humans , Male , Peer Group , Schools/statistics & numerical data , Surveys and Questionnaires , Young Adult
17.
Addict Behav ; 111: 106545, 2020 12.
Article in English | MEDLINE | ID: mdl-32771796

ABSTRACT

INTRODUCTION: Preventing adolescent alcohol use is an international public health priority. To further understand adolescent alcohol use, this study tested a model of adolescent intention to consume alcohol that incorporated multiple social systems influences. METHODS: Participants included 2529 Australian secondary school students (Mage = 14.20; 53.7% female). Participants completed a survey about risk and protective factors for alcohol use at individual, family, school and community levels. Structural Equation Modeling (path analysis) was used to evaluate an extended Theory of Planned Behavior (TPB) that incorporated social system determinants of intention to consume alcohol. RESULTS: The final model explained 60% of the variance in adolescent alcohol use intention. All TPB constructs correlated with intention and experience of lifetime alcohol use. More exposure to information about alcohol use had a weak but significant influence on adolescents' stronger perceived behavioral control. Having less friends who use alcohol, stricter parental rules for adolescent alcohol use, and unfavorable parent attitudes towards alcohol use, were associated with stronger adolescent anti-alcohol attitudes and subjective norms. Community level pro-abstinence attitudes predicted unfavorable adolescent attitudes to alcohol and intention to consume alcohol. Parental rules showed significantly stronger influences on alcohol use intention amongst younger adolescents. CONCLUSIONS: Key social systems around adolescents significantly predicted intention to consume alcohol, and the extended TPB model explained the major variance in adolescent alcohol use. The findings emphasize the importance of multi-level approaches to the prevention of alcohol use. Situation-based factors that could trigger impulsive emotional response may be a future intervention focus.


Subject(s)
Intention , Psychological Theory , Adolescent , Alcohol Drinking/epidemiology , Attitude , Australia/epidemiology , Female , Humans , Male , Surveys and Questionnaires
18.
Interdiscip Neurosurg ; 22: 100829, 2020 Dec.
Article in English | MEDLINE | ID: mdl-32835019

ABSTRACT

The current nCOVID-19 pandemic is raising several questions in the approximately 25% of patients who present with neurological symptoms. While secondary brain injury from the systemic manifestations of the disease account for the majority of non-specific neurological symptoms that include headache, nausea, and progressive confusion, the question that remains unanswered is does the nCOVID-19 virus use the olfactory mucosa as a portal to directly invade the brain? A second question is how common does direct CNS invasion complicate the classical cardiorespiratory severe form of the disease? We know from previous studies that almost all members of the Corona virus family have neurotropism. We also know from the current pandemic that deteriorating consciousness and cerebrovascular accidents are not uncommon. Several previous scattered case reports, and post-mortem examinations of brain tissue, demonstrated nCOVID-19 nucleic acid in the CSF, and brain tissue, of infected and deceased individuals. We performed a PubMed review of the literature to specifically assess the evidence for the direct CNS invasion by the nCOVID-19 virus. This phenomenon would explain the cerebral oedema and encephalitis, that does occur, and bring Neurosurgeons into the management of these patients by for example directed intra-cranial pressure management post insertion of an intra-cranial pressure monitor. Unfortunately, the answers to these questions were not definitively answered by the research reviewed. While suggestive that direct CNS invasion does occur, the exact scale and manifestations of the problem remains, to date, essentially unknown.

19.
World Neurosurg ; 140: 79-88, 2020 08.
Article in English | MEDLINE | ID: mdl-32389880

ABSTRACT

BACKGROUND: Fungal mass lesions in the central nervous system rarely reach a size large enough to directly cause neurologic deterioration. In terms of the etiologic incidence of fungal mass lesions in the central nervous system, whereas cryptococcomas may be the most common, they rarely reach any appreciable size. One form of this specific fungal infection, namely the granulomatous form of cryptococcomatosis, challenges this paradigm, and these lesions can reach an alarming size. CASE DESCRIPTION: We previously reported a case of multicentric granulomatous cryptococcomas occurring in an adult immunocompetent male patient published in WORLD NEUROSURGERY in mid-2018. We now report that despite confirmed gross total resection and subsequent neurologic improvement having been achieved at that time, the patient was not compliant with his prescribed adjuvant antifungal medical therapy, and for 6 months was lost to follow-up. We now report that the same patient again presented to our unit in early-2019 with recurrent granulomatous cryptococcomas, of an alarming even larger size, in the contralateral hemisphere. Fortunately, were again were able to successfully manage him surgically and have now adapted our surveillance plan to include booked follow-up magnetic resonance imaging. CONCLUSIONS: According to our review of the English literature, to our knowledge, this is the first report of recurrent granulomatous cryptococcomas occurring in the contralateral hemisphere within 6 months of surgery. The case illustrates the importance of the adjuvant antifungal medial therapy if recurrence is to be avoided.


Subject(s)
Medication Adherence , Meningitis, Cryptococcal/pathology , Antifungal Agents/therapeutic use , Humans , Male , Meningitis, Cryptococcal/drug therapy , Meningitis, Cryptococcal/surgery , Neurosurgical Procedures/methods , Recurrence , Young Adult
20.
J Colloid Interface Sci ; 565: 119-130, 2020 Apr 01.
Article in English | MEDLINE | ID: mdl-31945671

ABSTRACT

Understanding structure-property relationships is critical for the development of new drug delivery systems. This study investigates the properties of Pluronic smart hydrogel formulations for future use as injectable controlled drug carriers. The smart hydrogels promise to enhance patient compliance, decrease side effects and reduce dose and frequency. Pharmaceutically, these systems are attractive due to their unique sol-gel phase transition in the body, biocompatibility, safety and injectability as solutions before transforming into gel matrices at body temperature. We quantify the structural changes of F127 systems under controlled temperature after flow, as experienced during real bodily injection. Empirical formulae combining the coupled thermal and shear dependency are produced to aid future application of these systems. Induced structural transitions measured in-situ by small angle x-ray and neutron scattering reveal mixed oriented structures that can be exploited to tailor the drug release profile.


Subject(s)
Drug Delivery Systems , Hydrogels/chemistry , Poloxamer/chemistry , Drug Carriers/chemistry , Particle Size , Surface Properties
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