Experimental Analysis for the Performance Assessment and Characteristics of Enhanced Magnesium Composites Reinforced with Nano-Sized Silicon Carbide Developed Using Powder Metallurgy.

Magnesium, which is lightweight and abundant by nature, was widely used in the 19th century to make parts for automobiles and airplanes. Due to their superior strength-to-weight ratios, magnesium alloys were favored for engineering applications over unadulterated magnesium. These alloys result from the combination of magnesium with various metals, including aluminum (Al), titanium (Ti), zinc (Zn), manganese (Mn), calcium (Ca), lithium (Li), and zirconium (Zr). In this study, an alloy of magnesium was created using the powder metallurgy (PM) technique, and its optimal performance was determined through the Taguchi-Gray (TG) analysis method. To enhance the alloy's mechanical properties, diverse weight fractions of silicon carbide (SiC) were introduced. The study primarily focused on the Mg-Zn-Cu-Mn alloy, achieving the optimal composition of Mg-3Zn-1Cu-0.7Mn (ZC-31). Subsequently, composites of ZC-31/SiC were produced via PM and the hot extrusion (HE) process, followed by the assessment of the mechanical properties under various strain rates. The use of silicon carbide (SiC) resulted in enhanced composite densities as a consequence of the increased density exhibited by SiC particles. In addition, the high-energy postsintering approach resulted in a decrease in porosity levels. By integrating silicon carbide (SiC) to boost the microhardness, as well as the ultimate compressive and tensile strength of the composite material, we can observe significant improvements in these mechanical properties. The experimental findings also demonstrated that an augmentation in the weight fraction of SiC and the strain rate led to enhanced ductility and a shift toward a more transcrystalline fracture behavior inside the composite material.

Assessment of Salivary Mutans Streptococci Counts to Atraumatic Restorative Treatment Among Children: A Randomised Controlled Trial.

Introduction Besides the survival rate of restorations, the effect of atraumatic restorative treatment (ART) on bacterial count is also important. After ART restoration, the bacterial count drops due to the fluoride's antibacterial activity and hence it can decrease the chances of further decay. The present study assessed salivary mutans streptococci counts for six months of evaluations subsequent to ART among 12-15-year-old children attending schools in Piparia village, Vadodara district. Methods ART was performed on 32 children and followed up after six months to evaluate the success rate of ART. Saliva collection and microbial analysis were performed five times from every participant, before ART restoration placement, seven days, 30 days (one month), 90 days (three months) and 180 days (six months) post-restoration. Results At baseline, the mean colony forming units (CFU) was 48.30 ± 46.58, which reduced to 32.64 ± 30.40 at one week, which showed a 32% reduction in colony counts. This further reduced to 18.60 ± 20.81 at one month, marking a further 43% reduction in colony counts. This again reduced to 13.63 ± 18.04 at three months, which showed a 27% reduction in colony counts. CFU came to 16.23 ± 23.34 at six months, which showed a 19% increase in colony counts. Comparison of baseline mean CFU (48.30 ± 46.58) to six months mean CFU of streptococcus mutans (SM) (16.23 ± 23.34) showed a 66% reduction in colony counts. A statistically significant difference was found between numerous intervals of time of CFU of streptococcus mutans. Conclusion The findings reveal that ART is a clinical treatment that can be used to treat caries in young children, and it helped significantly reduce Streptococcus Mutans levels in saliva.

Assessment of skin response in T4b breast carcinoma patients post-neoadjuvant chemotherapy.

BACKGROUND: Breast cancer patients with skin ulcerations, satellite nodules or Peau d'orange at presentation are classified with stage 4 breast cancer (T4b). Neoadjuvant chemotherapy (NACT), followed by mastectomy, is the commonly accepted treatment in such patients for fear of adverse outcomes with breast conservation surgery (BCS) and uncertainty over sparing initially involved skin irrespective of the response to chemotherapy. Identifying patients with skin resolution post-NACT can help surgeons in decision-making. AIM: To assess skin response in T4b breast cancer patients post-NACT and find the correlation between various clinical and pathological factors associated with no skin involvement on final histology. METHODOLOGY: Records of breast cancer patients managed at the Tata Medical Center, Kolkata, with NACT for T4b breast carcinoma patients who underwent mastectomy were reviewed between January 2014 and December 2018. Final histology was checked for dermal involvement with the tumour. The Mann-Whitney U test was used for continuous variables for descriptive data, and Pearson's chi-squared and Fischer's exact tests were applied for categorical data. p-value < 0.05 was taken as significant. RESULTS: A total of 285 records mentioning skin involvement were reviewed, out of which 111 patients fulfilled the AJCC criterion. The median age at diagnosis of T4b breast cancer was 50 years. The median clinical size pre-chemotherapy was 7 cm. Residual median tumour size on final histology was reported as 1 cm. 78/111 patients showed a post-NACT response of 50% or more, and 43/111 showed a response of more than 90%. 57 (51.4%) patients showed skin involvement on final histopathology, while 54 (48.6%) patients did not.ER negative tumours were more likely to show no dermal involvement (p = 0.006). Residual tumour size of less than 1 cm on final histology (p < 0.05) and nodal stage were significant predictors of dermal response. CONCLUSION: Approximately half of the T4b breast cancer patients showed resolution of dermal skin involvement post-NACT. ER negative and those with residual tumour size less than 1 cm post-NACT are more likely to show dermal resolution. This can help surgeons plan a BCS or skin sparing mastectomy for such patients who usually end up having a mastectomy.

Availability, price and affordability of essential medicines for managing cardiovascular diseases and diabetes: a statewide survey in Kerala, India.

OBJECTIVE: Limited access to essential medicines (EMs) for cardiovascular disease (CVD) and diabetes is a major concern in low- and middle-income countries. We aimed to generate data on availability, price and affordability of EMs for CVD and diabetes in India. METHODS: Using WHO/HAI survey methodology, we evaluated availability and prices of 23 EMs in 30 public sector facilities (government hospitals and semi-public/government-subsidised-discount-pharmacies (GSDPs)) and 60 private retail pharmacies across six districts in Kerala state, India (November 2018 - May 2019). Median Price Ratios (MPRs) were calculated by comparing consumer prices with international reference prices. We also analysed data (collected in July 2020) on six anti-hypertensive fixed-dose-combinations (FDCs) that were designated as 'essential' by the WHO in 2019. RESULTS: Mean availability of surveyed generic EMs was 45.7% in government hospitals, 64.7% in GSDPs and 72.0% in private retail pharmacies. On average, the most-sold and highest-priced generics, respectively, were 6.6% and 8.9% costlier than the lowest-priced generics (LPG). Median MPR for LPG was 2.71 in private retail and 2.25 in GSDPs. Monthly supply of LPG would cost the lowest-paid worker 1.11 and 0.79 days' wages in private retail and GSDPs, respectively. Mean availability of the surveyed FDCs was poor (private retail: 15-85%; GSDPs: 8.3-66.7%), and the private retail prices of FDCs were comparable to the sum of corresponding constituent monotherapies. CONCLUSION: Availability of CVD and diabetes EMs fall short of WHO's 80% target in both sectors. Although availability in the private retail pharmacies was near-optimal, prices appear unaffordable compared to GSDPs. Initiatives such as mandating generic prescribing, adding the WHO-approved FDCs in local EM lists, improving price transparency, and streamlining medicine supply to ensure equitable access to EMs, especially in the public sector, are crucial in tackling Kerala's ever-increasing CVD burden.

OBJECTIF: L'accès limité aux médicaments essentiels (ME) pour les maladies cardiovasculaires (MCV) et le diabète est une préoccupation majeure dans les pays à revenu faible et intermédiaire. Nous visions à générer des données sur la disponibilité, le prix et l'aspect abordable des ME pour les MCV et le diabète en Inde. MÉTHODES: En utilisant la méthodologie OMS/HAI, nous avons évalué la disponibilité et les prix de 23 ME dans 30 établissements du secteur public (hôpitaux publics et pharmacies semi-publiques/à discompte subventionnées par le gouvernement (GSDP)) et 60 pharmacies de détail privées dans 6 districts de l'Etat du Kerala, en Inde. Les ratios de prix médians (RPM) ont été calculés en comparant les prix des consommateurs aux prix de référence internationaux. Nous avons également analysé les données de six combinaisons à dose fixe (CDF) d'antihypertensives désignées ''essentielles'' par l'OMS en 2019. RÉSULTATS: La disponibilité moyenne des ME génériques étudiés était de 45,7% dans les hôpitaux publics, de 64,7% dans les GSDP et de 72,0% dans le commerce de détail privé. En moyenne, les génériques les plus vendus et les plus chers, respectivement, étaient de 6,6% et 8,9% plus chers que les génériques les moins chers (GMC). Le RPM pour les (GMC) était de 2,71 dans le secteur privé et de 2,25 dans les GSDP. L'approvisionnement mensuel en GMC coûterait au travailleur le moins payé le salaire de 1,11 et 0,79 jour de travail dans le secteur de la vente au détail privé et dans les GSDP, respectivement. La disponibilité moyenne des CDF était faible (vente au détail privée: 15% - 85%; GSDP: 8,3%-66,7%), avec des prix de détail privés comparables à la somme des monothérapies constituantes correspondantes. CONCLUSION: La disponibilité des ME pour les MCV et le diabète est inférieure à l'objectif de 80% de l'OMS dans les deux secteurs. Bien que la disponibilité dans les pharmacies de détail privées soit presque optimale, les prix semblent inabordables par rapport aux GSDP. Des initiatives telles que la prescription de médicaments génériques, l'inscription des CDF sous ME, l'amélioration de la transparence des prix, la rationalisation de l'approvisionnement en médicaments pour assurer un accès équitable aux ME, en particulier dans le secteur public, sont essentielles pour faire face à la charge toujours croissante des MCV dans le Kerala.

Two-drug fixed-dose combinations of blood pressure-lowering drugs as WHO essential medicines: An overview of efficacy, safety, and cost.

Cardiovascular diseases (CVD) are the world's leading cause of death. High blood pressure (BP) is the leading global risk factor for all-cause preventable morbidity and mortality. Globally, only about 14% of patients achieve BP control to systolic BP <140 mm Hg and diastolic BP <90 mm Hg. Most patients (>60%) require two or more drugs to achieve BP control, yet poor adherence to therapy is a major barrier to achieving this control. Fixed-dose combinations (FDCs) of BP-lowering drugs are one means to improve BP control through greater adherence and efficacy, with favorable safety and cost profiles. The authors present a review of the supporting data from a successful application to the World Health Organization (WHO) for the inclusion of FDCs of two BP-lowering drugs on the 21st WHO Essential Medicines List. The authors discuss the efficacy and safety of FDCs of two BP-lowering drugs for the management of hypertension in adults, relevant hypertension guideline recommendations, and the estimated cost of such therapies.

Relationship of Body Mass Index With Outcomes After Transcatheter Aortic Valve Replacement: Results From the National Cardiovascular Data-STS/ACC TVT Registry.

OBJECTIVE: To investigate the relationship of body mass index (BMI) with short- and long-term outcomes after transcatheter aortic valve replacement (TAVR). PATIENTS AND METHODS: The relationship between BMI and baseline characteristics and procedural characteristics was assessed for 31,929 patients who underwent TAVR between November 1, 2011, and March 31, 2015, from the STS/ACC TVT Registry. Registry data on 20,429 patients were linked to the Centers for Medicare and Medicaid Services to assess the association of BMI with 30-day and 1-year mortality using multivariable Cox proportional hazards models. The effect of BMI on mortality was also assessed with BMI as a continuous variable. Restricted cubic regression splines were used to model the effect of BMI and to determine appropriate cut points of BMI. RESULTS: Among 31,929 patients, 806 (2.5%) were underweight (BMI, <18.5 kg/m2), 10,755 (33.7%) had normal weight (BMI, 18.5- 24.9 kg/m2), 10,691 (33.5%) were overweight (BMI, 25.0-29.9 kg/m2), 5582 (17.5%) had class I obesity (BMI, 30.0-34.9 kg/m2), 2363 (7.4%) had class II obesity (BMI, 35.0-39.9 kg/m2), and 1732 (5.4%) had class III obesity (BMI, ≥40 kg/m2). Patients in various BMI categories were different in most baseline and procedural characteristics. On multivariable analysis, compared with normal-weight patients, underweight patients had higher mortality at 30 days and at 1 year after TAVR (hazard ratio [HR], 1.35; 95% CI, 1.02-1.78 and HR, 1.41; 95% CI, 1.17-1.69, respectively), whereas overweight patients and those with class I and II obesity had a decreased risk of mortality at 1 year (HR, 0.88; 95% CI, 0.81-0.95, HR, 0.80; 95% CI, 0.72-0.89, and HR, 0.84; 95% CI, 0.72-0.98, respectively). For BMI of 30 kg/m2 or less, each 1-kg/m2 increase was associated with a 2% and 4% decrease in the risk of 30-day and 1-year mortality, respectively; for BMI greater than 30 kg/m2, a 1-kg/m2 increase was associated with a 3% increased risk of 30-day mortality but not with 1-year mortality. CONCLUSION: Results of this large registry study evaluating the relationship of BMI and outcomes after TAVR support the existence of an obesity paradox among patients with severe aortic stenosis undergoing TAVR.

Evaluating access to essential medicines for treating childhood cancers: a medicines availability, price and affordability study in New Delhi, India.

INTRODUCTION: Limited access to essential medicines (EMs) for treating chronic diseases is a major challenge in low-income and middle-income countries. Although India is the largest manufacturer of generic medicines, there is a paucity of information on availability, price and affordability of anti-neoplastic EMs, which this study evaluates. METHODS: Using a modified WHO/Health Action International methodology, data were collected on availability and price of 33 strength-specific anti-neoplastic EMs and 4 non-cancer EMs. Seven 'survey anchor' hospitals (4 public and 3 private) and 32 private-sector retail pharmacies were surveyed. Median price ratios (MPRs) were calculated by comparing consumer prices with international reference prices (IRPs). RESULTS: On average, across survey anchor areas (hospital and private-sector retail pharmacies combined), the mean availability of anti-neoplastic EMs and non-cancer medicines was 70% and 100%, respectively. Mean availability of anti-neoplastic EMs was 38% in private-sector retail pharmacies, 43% in public hospital pharmacies and 71% in private hospital pharmacies. Median MPR of lowest-priced generic versions was 0.71 in retail pharmacies. The estimated cost of chemotherapy medicines needed for treating a 30 kg child with standard-risk leukaemia was INR 27 850 (US$442) and INR 17 500 (US$278) for Hodgkin's lymphoma, requiring 88 and 55 days' wages, respectively, for the lowest paid government worker. CONCLUSION: Most anti-neoplastic EMs are found in survey anchor areas, however, mean availability was less than non-cancer medicines; not meeting the WHO target of 80%. Medicine prices were relatively low in New Delhi compared with IRPs. However, the cost of chemotherapy medicines seems unaffordable in the local context.

Geographic and socio-economic variation in markers of indoor air pollution in Nepal: evidence from nationally-representative data.

BACKGROUND: In low-income countries such as Nepal, indoor air pollution (IAP), generated by the indoor burning of biomass fuels, is the top-fourth risk factor driving overall morbidity and mortality. We present the first assessment of geographic and socio-economic determinants of the markers of IAP (specifically fuel types, cooking practices, and indoor smoking) in a nationally-representative sample of Nepalese households. METHODS: Household level data on 11,040 households, obtained from the 2016 Nepal Demographic and Health Survey, were analyzed. Binary logistic regression analyses were conducted to assess the use of fuel types, indoor cooking practices, indoor smoking and IAP with respect to socio-economic indicators and geographic location of the household. RESULTS: More than 80% of the households had at least one marker of IAP: 66% of the household used unclean fuel, 45% did not have a separate kitchen to cook in, and 43% had indoor smoking. In adjusted binary logistic regression, female and educational attainment of household's head favored cleaner indoor environment, i.e., using clean fuel, cooking in a separate kitchen, not smoking indoors, and subsequently no indoor pollution. In contrast, households belonging to lower wealth quintile and rural areas did not favor a cleaner indoor environment. Households in Province 2, compared to Province 1, were particularly prone to indoor pollution due to unclean fuel use, no separate kitchen to cook in, and smoking indoors. Most of the districts had a high burden of IAP and its markers. CONCLUSIONS: Fuel choice and clean indoor practices are dependent on household socio-economic status. The geographical disparity in the distribution of markers of IAP calls for public health interventions targeting households that are poor and located in rural areas.

Environmental impact assessment of uranium exploration and development on indigenous land in Labrador (Canada): a community-driven initiative.

There is hardly any study on environmental impacts of uranium exploration and mining development prior to actual mining activities. Rather, the majority of the literature addresses the environmental impacts of either ongoing or decommissioned mines. The objective of the study was to measure the possible radioactive contamination (total uranium and lead) in the local ecosystem surrounding an abandoned uranium development site on indigenous land in Labrador (Canada). Water (brook and ponds), soil/sediments (brook and ponds), plants (growing along the brook and pond shores), and local fish (trout) and clams from bays were collected from mine development site, downstream, and control sites. Uranium and lead mobilization in the local environment appears to be slightly enhanced near the proposed mining site, but rapidly drops downstream. Developing a low-cost, community-based environmental health monitoring tool is an ideal strategy for generating baseline information and further follow-up.

Burden of Acute Myeloid Leukemia Among Older, Newly Diagnosed Patients: Retrospective Analysis of Data From the 2010-2012 Medicare Limited Data Set.

PURPOSE: Acute myeloid leukemia (AML) disproportionately affects older adults; the prognosis in this subpopulation is generally poor, with variable use of inpatient chemotherapy. This study characterizes treatment patterns, hospitalizations, and outcomes among older patients with AML. METHODS: Using the Centers for Medicare & Medicaid Services' 2010-2012 100% Limited Data Set (LDS), data from all hospital claims from fee-for-service Medicare beneficiaries between 60 and 75 years of age with newly diagnosed AML and ≥1 hospitalization were analyzed. FINDINGS: Among 3700 identified patients with AML, 1979 (53.5%) received chemotherapy. Hospitalization rates were highest initially and then declined over time, irrespective of chemotherapy use. The mean length of initial hospital stay was longer in patients receiving chemotherapy. Intensive care unit admissions occurred in 33% of initial hospitalizations. Factors associated with receiving chemotherapy included younger age, fewer comorbidities, and the absence of prior hematologic disorders. Chemotherapy was associated with significantly increased survival compared with no chemotherapy (P < 0.0001). IMPLICATIONS: AML in older patients is associated with frequent hospitalizations and intensive care unit admissions. New treatment options with more favorable risk-to-benefit profiles are needed in this population.

Overexpression of tryptophan decarboxylase and strictosidine synthase enhanced terpenoid indole alkaloid pathway activity and antineoplastic vinblastine biosynthesis in Catharanthus roseus.

Terpenoid indole alkaloid (TIA) biosynthetic pathway of Catharanthus roseus possesses the major attention in current metabolic engineering efforts being the sole source of highly expensive antineoplastic molecules vinblastine and vincristine. The entire TIA pathway is fairly known at biochemical and genetic levels except the pathway steps leading to biosynthesis of catharanthine and tabersonine. To increase the in-planta yield of these antineoplastic metabolites for the pharmaceutical and drug industry, extensive plant tissue culture-based studies were performed to provide alternative production systems. However, the strict spatiotemporal developmental regulation of TIA biosynthesis has restricted the utility of these cultures for large-scale production. Therefore, the present study was performed to enhance the metabolic flux of TIA pathway towards the biosynthesis of vinblastine by overexpressing two upstream TIA pathway genes, tryptophan decarboxylase (CrTDC) and strictosidine synthase (CrSTR), at whole plant levels in C. roseus. Whole plant transgenic of C. roseus was developed using Agrobacterium tumefaciens LBA1119 strain having CrTDC and CrSTR gene cassette. Developed transgenic lines demonstrated up to twofold enhanced total alkaloid production with maximum ninefold increase in vindoline and catharanthine, and fivefold increased vinblastine production. These lines recorded a maximum of 38-fold and 65-fold enhanced transcript levels of CrTDC and CrSTR genes, respectively.

On the Exploration of Information From the DTW Cost Matrix for Online Signature Verification.

This paper explores the utility of information derived from the dynamic time warping (DTW) cost matrix for the problem of online signature verification. The prior works in literature primarily utilize only the DTW scores to authenticate a test signature. To the best of our knowledge, the characteristics of the warping path (used for the alignment) in the cost matrix is hardly exploited for verification of online signatures. Accordingly, we devise a score that utilizes the information from the cost matrix and warping path alignments. We subsequently consider its fusion (using a sum rule combiner) with the DTW score for authenticating the veracity of a test signature. In addition, a minor modification is suggested with regards to the set of features employed for matching the signatures. We introduce a spacing parameter for feature extraction and demonstrate its applicability in increasing the separation between the distribution of genuine and forgery signatures for an user. Our method has been tested on two publicly available online signature databases namely the SVC-2004 Task 2 and MCYT-100. We report reduction in error rates over the traditional DTW framework.

Genetic engineering approach using early Vinca alkaloid biosynthesis genes led to increased tryptamine and terpenoid indole alkaloids biosynthesis in differentiating cultures of Catharanthus roseus.

Catharanthus roseus today occupies the central position in ongoing metabolic engineering efforts in medicinal plants. The entire multi-step biogenetic pathway of its very expensive anticancerous alkaloids vinblastine and vincristine is fairly very well dissected at biochemical and gene levels except the pathway steps leading to biosynthesis of monomeric alkaloid catharanthine and tabersonine. In order to enhance the plant-based productivity of these pharma molecules for the drug industry, cell and tissue cultures of C. roseus are being increasingly tested to provide their alternate production platforms. However, a rigid developmental regulation and involvement of different cell, tissues, and organelles in the synthesis of these alkaloids have restricted the utility of these cultures. Therefore, the present study was carried out with pushing the terpenoid indole alkaloid pathway metabolic flux towards dimeric alkaloids vinblastine and vincristine production by over-expressing the two upstream pathway genes tryptophan decarboxylase and strictosidine synthase at two different levels of cellular organization viz. callus and leaf tissues. The transformation experiments were carried out using Agrobacterium tumefaciens LBA1119 strain having tryptophan decarboxylase and strictosidine synthase gene cassette. The callus transformation reported a maximum of 0.027% dry wt vindoline and 0.053% dry wt catharanthine production, whereas, the transiently transformed leaves reported a maximum of 0.30% dry wt vindoline, 0.10% catharanthine, and 0.0027% dry wt vinblastine content.

'Optimized' LV only pacing using a dual chamber pacemaker as a cost effective alternative to CRT.

BACKGROUND: Cardiac Resynchronization therapy (CRT) remains largely under-used in developing countries owing to the high cost of therapy. In this pilot study, we explore 'optimized' Left Ventricle Only Pacing (LVOP) as a cost effective alternative to cardiac resynchronization therapy in selected patients with heart failure. HYPOTHESIS: In economically poorer patients with heart failure, left bundle branch block (LBBB) and intact AV node conduction, synchronization can be obtained using a dual chamber pacemaker (leads in right atrium and Left ventricle) with the help of 2D strain imaging. METHODS AND RESULTS: 4 patients underwent LVOP for symptomatic heart failure. Post procedure 'optimization' was done using 12 lead electrocardiography and 2D- Strain imaging. Difference between Time to Peak longitudinal strain and Aortic valve Closure (Diff TPL-AC) was calculated for each segment at different AV delays and the AV delay with the smallest Diff TPL-AC was programmed. The mean AV delay that resulted in electrical and mechanical synchrony was 150 ms. After a mean follow up of 6 months, all patients had improved by at least 1 NYHA class. The mean reduction in QRS duration post procedure was -54.5 ± 22.82 ms and the mean improvement in EF was 7 ± 2.75%. CONCLUSION: Optimized LVOP using 2D strain and ECG can be a cost-effective alternative to CRT in patients with LBBB, heart failure and normal AV node conduction.

Socioeconomic status and utilization of amblyopia services at a tertiary pediatric hospital in Canada.

OBJECTIVE: To evaluate whether socioeconomic status is associated with equal utilization of amblyopia services at The Hospital for Sick Children (SickKids), a pediatric tertiary hospital in Canada. DESIGN: This is a retrospective, cross-sectional study. PARTICIPANTS: The medical records of children aged under 7 years diagnosed with amblyopia at SickKids from 2007 to 2009 were reviewed. METHODS: Socioeconomic status was derived from patients' residential postal codes through linking with income data in the 2006 Canadian census report. Patients were divided into 5 income quintiles to compare with amblyopia service utilization. The main outcome measure was the observed distribution of amblyopia patients by socioeconomic status versus the expected distribution of 20% for each quintile. RESULTS: The analyses included 336 patients. Children with amblyopia at SickKids were more likely to come from the richest neighbourhood (32.5%), whereas children from each of the 3 lowest quintiles (14.6%-15.5%) were less likely to present at SickKids. These results differed significantly from the expected 20% for each quintile (p < 0.0001). All types of amblyopia were significantly under-represented for children from the lower socioeconomic groups. When analyses were stratified by travel distance to the hospital, a significant inequality between the lower and higher income quintiles remained for nonmetropolitan Toronto patients, but not for metropolitan Toronto patients. CONCLUSION: Despite a publicly funded health-care system in Canada, children from lower socioeconomic neighbourhoods in distant areas utilize the amblyopia services in a tertiary pediatric centre less often than those from higher socioeconomic status.

The prevalence of malocclusion and orthodontic treatment needs in school going children of Nalagarh, Himachal Pradesh, India.

OBJECTIVE: The aim of this study was to determine the prevalence of malocclusion and orthodontic treatment need in 13-18-year-old schoolchildren of Nalagarh, Himachal Pradesh, India using the Index of Orthodontic Treatment need (IOTN) and to analyze the treatment needs between males and females and correlation between the esthetic component (AC) and dental health component (DHC) of IOTN. SUBJECTS AND METHODS: The sample comprised 2000 school children (1125 females and 875 males) who had not undergone orthodontic treatment. No radiographs, study casts, were used; IOTN was calculated from clinical examination. RESULTS: DHC results showed that little need for orthodontic treatment was found in 31.6% and moderate need in 30.85%. A great need was estimated at 37.55%. Severe contact point displacement of more than 4 mm was the most common occlusal feature in the definite treatment need group, followed by increased overjet, impeded eruption of teeth, and anterior or posterior cross bite. AC results showed that little need for orthodontic treatment was in 86.15%, moderate need in 8.90%, and great need in 4.95%. LIMITATIONS: Index does not consider midline discrepancy, soft tissue abnormalities, and AC does not include Class III and Class II div 2 malocclusion photographs. CONCLUSIONS: There seems a discrepancy in the proportion of children needing orthodontic treatment on esthetic and dental health grounds. This study provides baseline data on the need and demand for orthodontic treatment among the sample which is important for planning public orthodontic and dental services.

Evaluating availability and price of essential medicines in Boston area (Massachusetts, USA) using WHO/HAI methodology.

BACKGROUND: Many patients even those with health insurance pay out-of-pocket for medicines. We investigated the availability and prices of essential medicines in the Boston area. METHODS: Using the WHO/HAI methodology, availability and undiscounted price data for both originator brand (OB) and lowest price generic (LPG) equivalent versions of 25 essential medicines (14 prescription; 11 over-the-counter (OTC)) were obtained from 17 private pharmacies. The inclusion and prices of 26 essential medicines in seven pharmacy discount programs were also studied. The medicine prices were compared with international reference prices (IRPs). RESULTS: In surveyed pharmacies, the OB medicines were less available as compared to the generics. The OB and LPG versions of OTC medicines were 21.33 and 11.53 times the IRP, respectively. The median prices of prescription medicines were higher, with OB and LPG versions at 158.14 and 38.03 times the IRP, respectively. In studied pharmacy discount programs, the price ratios of surveyed medicines varied from 4.4-13.9. CONCLUSIONS: While noting the WHO target that consumers should pay no more than four times the IRPs, medicine prices were considerably higher in the Boston area. The prices for medicines included in the pharmacy discount programs were closest to WHO's target. Consumers should shop around, as medicine inclusion and prices vary across discount programs. In order for consumers to identify meaningful potential savings through comparison shopping, price transparency is needed.

Clinical Applications of Natriuretic Peptides in Assessment of Valvular Heart Disease.

Biomarkers such as natriuretic peptides (NPs) have evolving clinical utility beyond the scope of heart failure. The role of NPs in the management of valvular heart disease is a growing area of investigation. NPs have much potential in the assessment of asymptomatic patients with hemodynamically significant valvular lesions who have traditionally been excluded from consideration of surgical intervention. NPs also have a role in the risk stratification of these patients as well as in routine surveillance and monitoring. Together with echocardiographic data and functional status, NPs are being incorporated into the management of valvular heart disease. In this review we examine the evidence for the role of natriuretic peptides in assessment of VHD.

Continuous processing for production of biopharmaceuticals.

The merits of continuous processing over batch processing are well known in the manufacturing industry. Continuous operation results in shorter process times due to omission of hold steps, higher productivity due to reduced shutdown costs, and lowers labor requirement. Over the past decade, there has been an increasing interest in continuous processing within the bioprocessing community, specifically those involved in production of biotherapeutics. Continuous operations in upstream processing (perfusion) have been performed for decades. However, recent development of continuous downstream operations has led the industry to envisage an integrated bioprocessing platform for efficient production. The regulators, key players in the biotherapeutic industry, have also expressed their interest and willingness in this migration from the traditional batch processing. This paper aims to review major developments in continuous bioprocessing in the past decade. A discussion of pros and cons of the different proposed approaches has also been presented.