Efficient biodegradation of Polyethylene terephthalate (PET) plastic by Gordonia sp. CN2K isolated from plastic contaminated environment.

Since we rely entirely on plastics or their products in our daily lives, plastics are the invention of the hour. Polyester plastics, such as Polyethylene Terephthalate (PET), are among the most often used types of plastics. PET plastics have a high ratio of aromatic components, which makes them very resistant to microbial attack and highly persistent. As a result, massive amounts of plastic trash accumulate in the environment, where they eventually transform into microplastic (<5 mm). Rather than macroplastics, microplastics are starting to pose a serious hazard to the environment. It is imperative that these polymer microplastics be broken down. Through the use of enrichment culture, the PET microplastic-degrading bacterium was isolated from solid waste management yards. Bacterial strain was identified as Gordonia sp. CN2K by 16 S rDNA sequence analysis and biochemical characterization. It is able to use polyethylene terephthalate as its only energy and carbon source. In 45 days, 40.43 % of the PET microplastic was degraded. By using mass spectral analysis and HPLC to characterize the metabolites produced during PET breakdown, the degradation of PET is verified. The metabolites identified in the spent medium included dimer compound, bis (2-hydroxyethyl) terephthalate (BHET), mono (2-hydroxyethyl) terephthalate (MHET), and terephthalate. Furthermore, the PET sheet exposed to the culture showed considerable surface alterations in the scanning electron microscope images. This illustrates how new the current work is.

Closing the Loop on Revision: The Impact of Emotional Well-Being on Elective Revision After Breast Reconstruction.

BACKGROUND: A diagnosis of breast cancer has a significant impact on a patient's physical and emotional health. Breast reconstruction improves quality of life and self-esteem following mastectomy. However, many patients undergo additional elective revision procedures after reconstruction. OBJECTIVES: This study aims to assess the relationship between perioperative emotional well-being and elective revisions in breast reconstruction. METHODS: A retrospective review was performed of patients who underwent breast reconstruction with a single surgeon from January 2007- December 2017. Revision procedures were defined as additional operations that fall outside the index reconstructive plan. Medical records were reviewed for a history of generalized anxiety disorder (GAD) and/or major depressive disorder (MDD). Multivariate analysis was performed to identify factors associated with revision. RESULTS: A total of 775 patients undergoing breast reconstruction were included, of which 121 (15.6%) underwent elective revision. Overall, a history of any psychiatric history (p<0.001), depression alone (p=0.001%), and GAD and depression together (p=0.003) were significantly associated with revision surgery. On multivariate logistic regression controlling for comorbidities and reconstruction modality, depression alone and GAD and depression together were significantly associated with increased likelihood of revision surgery (OR 3.20, p<0.001; OR 2.63, p<0.001). CONCLUSIONS: Peri-operative emotional well-being and reconstruction modality impact the rate of secondary revision surgery. An understanding of the surgical and patient-related risk factors for revision can provide more informed patient-decision making and improve surgical planning.

Risk Factors for Suboptimal Bowel Preparation for Colonoscopy in Pediatric Patients.

BACKGROUND/AIMS: Suboptimal bowel cleansing is common in children and can impact diagnostic and therapeutic outcomes. We aimed to identify risk factors for suboptimal bowel preparation for colonoscopy in pediatric patients. METHODS: This was a retrospective study of all patients ages 0 to 21 years who underwent colonoscopy at a children's hospital from 2015 to 2019 in the United States. Demographics and clinical information were obtained from the electronic health record. The primary outcome was suboptimal bowel preparation measured by the endoscopist on a dichotomized Aronchik Scale. Univariate and multivariate regression modeling were used to determine independent predictors of suboptimal preparation. RESULTS: Nine hundred and eight patients (mean age 12.17 years [±5.14], boys 465 (51.2%), were included in the analysis. Suboptimal preparation was noted in 242 (26.7%). On univariate analysis, suboptimal preparation was more common in those of younger age (38.6%), Medicaid (32.1%), Spanish as primary language (35.7%), and failure to thrive (FTT) (45.9%). Suboptimal preparations were less common in patients with inflammatory bowel disease (IBD) (11.6%). After adjustment for other covariates, IBD and FTT maintained their statistical associations, IBD (odds ratio [OR] 0.27 95% confidence interval [CI] 0.095-0.75, P =  0.01), FTT (OR 1.98 95% CI 1.28-3.06, P =  <0.01). CONCLUSIONS: To our knowledge, this is the first investigation of pediatric patients to identify independent risk factors for suboptimal bowel preparation. We confirm Medicaid status and English as a second language as risk factors as well as highlight distinct associations from those reported in the adult literature including FTT and younger age. IBD was associated with optimal cleansing. Future research to understand the mechanisms of inferred risk or potential protection is required.

Breast Cancer Litigation in the 21st Century.

BACKGROUND: Approximately 15% of general surgeons practicing in the United States face a medical malpractice lawsuit each year. This study aimed to determine the reasons for litigation for breast cancer care during the past 17 years by reviewing a public legal database. METHODS: The LexisNexis legal database was queried using a comprehensive list of terms related to breast cancer, identifying all cases from 2000 to 2017. Data were abstracted, and descriptive analyses were performed. RESULTS: The study identified 264 cases of litigation pertaining to breast cancer care. Delay in breast cancer diagnosis was the most common reason for litigation (n = 156, 59.1%), followed by improperly performed procedures (n = 26, 9.8%). The medical specialties most frequently named in lawsuits as primary defendants were radiology (n = 76, 28.8%), general surgery (n = 74, 28%), and primary care (n = 52, 19.7%). The verdict favored the defendant in 145 cases (54.9%) and the plantiff in 60 cases (22.7%). In 59 cases (22.3%), a settlement was reached out of court. The median plaintiff verdict payouts ($1,485,000) were greater than the settlement payouts ($862,500) (p = 0.04). CONCLUSION: Failure to diagnose breast cancer in a timely manner was the most common reason for litigation related to breast cancer care in the United States. General surgery was the second most common specialty named in the malpractice cases studied. Most cases were decided in favor of the defendant, but when the plaintiff received a payout, the amount often was substantial. Identifying the most common reasons for litigation may help decrease this rate and improve the patient experience.

Biodegradation of fluoranthene by Paenibacillus sp. strain PRNK-6: a pathway for complete mineralization.

A high-efficiency fluoranthene-degrading bacterium Paenibacillus sp. PRNK-6 was isolated from PAH-contaminated soil. The strain degrades 96% (240 mg l-1) of fluoranthene in 48 h. Various metabolic intermediates of fluoranthene catabolism were identified by gas chromatography (GC) and gas chromatography-high resolution mass spectrometry (GC-HRMS). Metabolite characterization, metabolite-feeding experiments, and appropriate enzyme activities in the cell-free extracts suggest the existence of a bifurcated pathway down the phthalic acid for complete mineralization of fluoranthene in PRNK-6. In this strain, fluoranthene catabolism begins by the attack on the fused aromatic ring portion of fluoranthene. Two terminal aromatic metabolites protocatechuate and catechol undergo ring cleavage by protocatechuate 3,4-dioxygenase and catechol 1,2-dioxygenase, respectively, and enter the central metabolism.

Determinants of Pediatric EMS Utilization in Children with High-Acuity Conditions.

BACKGROUND: Underutilization of emergency medical services (EMS) for children with high-acuity conditions is poorly understood. Our objective was to identify differences in demographic factors and describe caregivers' knowledge, beliefs, and attitudes regarding EMS utilization for children with high-acuity conditions. DESIGN/METHODS: This was a mixed-methods study of children with high acuity conditions, defined as requiring immediate medical or surgical intervention and intensive care admission, over a one year period. Demographic data were collected through a retrospective chart review. Qualitative analysis of semi-structured interviews from a purposive sample of caregivers was conducted until thematic saturation was achieved. RESULTS: Three hundred seventy-four charts were reviewed; 19 caregivers were interviewed (17 in-person, 2 via telephone). The 232 (62%) children not arriving by EMS tended to be younger (1.58 years vs. 2.31 years, p = 0.02), privately insured (30% vs. 19%, p = 0.04), and lived further from the hospital (16.80 miles vs. 12.45 miles, p = 0.001). Patient gender, ethnicity, comorbidities and caregiver language were not associated with EMS underutilization. Immediate invasive medical interventions were more often required for EMS utilizers (85% vs. 60%, p < 0.001). EMS utilizers were more likely to require intubation (78% vs. 47%, p < 0.001) and cardiopulmonary resuscitation (CPR) (26% vs. 2%, p < 0.001), and had shorter hospital stays (4.70 vs. 8.16 days; p-value < 0.001). Three principal themes determined EMS utilization: expectations, knowledge, and perceived barriers. Three principal themes determined EMS utilization: expectations, knowledge, and perceived barriers. Caretakers expected EMS would provide timely, safe transportation that expedited medical care and emotional support. Medical knowledge and prior experience with EMS influenced decision-making about arrival mode. Timeliness, cost, socioeconomic and demographic characteristics, loss of autonomy, and the logistics of EMS activation and transport were the most commonly reported barriers. CONCLUSIONS: Young age, private insurance status, and greater distance from the hospital were associated with EMS underutilization. Understanding caregiver expectations, knowledge, and perceived barriers may have important implications for the use of EMS for children. These findings reveal opportunities for improved public education on EMS systems to enhance appropriate EMS utilization for children with high acuity conditions.

Enhanced utilization of fluorene by Paenibacillus sp. PRNK-6: Effect of rhamnolipid biosurfactant and synthetic surfactants.

The present investigation was to study the effect of different non-ionic surfactants (Tween-80, Tween-60, Tween-40, Tween-20, Triton X-100) and a rhamnolipid biosurfactant on the degradation of fluorene by Paenibacillus sp. PRNK-6. An enhancement in the growth, as well as fluorene utilization by this strain were observed in the presence of biosurfactant and non-ionic surfactants except Tween-20 and Triton X-100. Triton X-100 and Tween-20 were toxic to this bacterium. The strain PRNK-6 utilized 75% of fluorene (280mg/L) in 24h in an unamended condition. On the other hand, the complete utilization of higher concentration fluorene (320mg/L) by this strain was noticed when the medium was amended with Tween-80 (1.5% v/v) within 24h of incubation. Whereas, 90.6%, 96.5% and 96.7% of fluorene (280mg/L) was utilized when amended with Tween-60 (3.5% v/v), Tween-40 (3% v/v) and biosurfactant (25mg/L) respectively. Biosurfactant promoted the fluorene degradation potential of PRNK-6 as 96.2% of 320mg/L fluorene was degraded within 24h. Further, the added tween series surfactants and a biosurfactant have increased the cell surface hydrophobicity of the PRNK-6. Thus correlating with the enhanced degradation of the fluorene.

Filarial Abundant Larval Transcript Protein ALT-2: An Immunomodulatory Therapeutic Agent for Type 1 Diabetes.

Type 1 diabetes (T1D) that accounts for about 5-10 % of all diabetes cases results from the autoimmune destruction of the insulin-producing beta cells in the pancreas. It is characterized by severe inflammatory reaction mediated by pronounced T helper type-1 response. Parasitic infections having the ability to skew the host immune responses towards type-2 type as a part of their defense mechanism are able to induce protection against autoimmune diseases like T1D. Hence, the present study is undertaken to explore a recombinant abundant larval transcript protein of the human lymphatic filarial parasite Brugia malayi (rBmALT-2), a known anti-inflammatory molecule for its therapeutic effect on streptozotocin (STZ)-induced T1D in mice. The diabetic mice on treatment with rBmALT-2 showed a significant (p < 0.0005) decrease in their fasting blood glucose levels. By the end of the second week after the initiation of treatment with the rBmALT-2, 28 % of the diabetic mice became normal and none of them were diabetic by the end of 5th week. The anti-diabetic effect of rBmALT-2 significantly correlated with the concomitant redressal of the pancreatic histopathological damage caused by STZ assault (rho = 0.87; p < 0.0005). The sera of rBmALT-2 treated diabetic mice had increased levels of IgG1 antibodies associated with decreased IgG2a antibodies against the principal autoantigen insulin. The splenocyte proliferative response and the cytokine release in the treated mice showed marked bias against inflammation skewing the immune response to Th-2 type. From this study, it can be envisaged that that filarial proteins like rBmALT-2 with effective immunomodulatory activity and anti-diabetic effect are promising alternative therapeutic agents for T1D.

A Case Report Highlighting the Significance of COVID-19 Unveiling Megaloblastic Anemia and Worsening Dementia in the Elderly.

The COVID-19 pandemic has resulted in substantial lifestyle changes with significant implications for nutritional health. Factors such as movement restrictions and disruptions in food supply chains led to the restricted availability of primary sources of essential micronutrients. To highlight this, we present the case of an elderly woman with an underlying subclinical cobalamin deficiency who developed symptomatic megaloblastic anemia, requiring hospital admission under lockdown conditions. This exemplifies how changes in diet during the COVID-19 lockdown have hastened the onset of B12 deficiency symptoms. Adverse outcomes can be avoided by identifying people at high risk of poor nutritional status and implementing policy initiatives that enhance their nutritional condition. This case report showed how important the B12 shortage was during the COVID-19 lockdown, especially for older people. They are more likely to be malnourished during COVID-19 for several reasons.

Expanded Stability of Layered SnSe-PbSe Alloys and Evidence of Displacive Phase Transformation from Rocksalt in Heteroepitaxial Thin Films.

Bulk PbSnSe has a two-phase region, or miscibility gap, as the crystal changes from a van der Waals-bonded orthorhombic 2D layered structure in SnSe-rich compositions to the related 3D-bonded rocksalt structure in PbSe-rich compositions. This structural transition drives a large contrast in the electrical, optical, and thermal properties. We realize low temperature direct growth of epitaxial PbSnSe thin films on GaAs via molecular beam epitaxy using an in situ PbSe surface treatment and show a significantly reduced two-phase region by stabilizing the Pnma layered structure out to Pb0.45Sn0.55Se, beyond the bulk limit around Pb0.25Sn0.75Se at low temperatures. Pushing further, we directly access metastable two-phase films of layered and rocksalt grains that are nearly identical in composition around Pb0.50Sn0.50Se and entirely circumvent the miscibility gap. We present microstructural and compositional evidence for an incomplete displacive transformation from a rocksalt to layered structure in these films, which we speculate occurs during the sample cooling to room temperature after synthesis. In situ temperature-cycling experiments on a Pb0.58Sn0.42Se rocksalt film reproduce characteristic attributes of a displacive transition and show a modulation in electronic properties. We find well-defined orientation relationships between the phases formed and reveal unconventional strain relief mechanisms involved in the crystal structure transformation using transmission electron microscopy. Overall, our work adds a scalable thin film integration route to harness the dramatic contrast in material properties in PbSnSe across a potentially ultrafast crystalline-crystalline structural transition.

Voltage control of magnetic order in RKKY coupled multilayers.

In the field of antiferromagnetic (AFM) spintronics, there is a substantial effort present to make AFMs viable active components for efficient and fast devices. Typically, this is done by manipulating the AFM Néel vector. Here, we establish a method of enabling AFM active components by directly controlling the magnetic order. We show that magneto-ionic gating of hydrogen enables dynamic control of the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction in solid-state synthetic AFM multilayer devices. Using a gate voltage, we tune the RKKY interaction to drive continuous transitions from AFM to FM and vice versa. The switching is submillisecond at room temperature and fully reversible. We validate the utility of this method by demonstrating that magneto-ionic gating of the RKKY interaction allows for 180° field-free deterministic switching. This dynamic method of controlling a fundamental exchange interaction can engender the manipulation of a broader array of spin textures, e.g., chiral domain walls and skyrmions.

Psychosocial and quality-of-life factors associated with depigmentation therapy for vitiligo.

BACKGROUND: There is a paucity of data examining the psychosocial factors relevant to depigmentation therapy, an irreversible treatment for vitiligo. This study explores patients' perspective and experience while undergoing depigmentation therapy and quality-of-life effects of such therapy. METHODS: An online instrument assessing the impact of depigmentation therapy on various psychosocial variables and including the validated Dermatology Life Quality Index (DLQI) were administered to two groups of participants with vitiligo: (1) those who are currently undergoing or have completed depigmentation therapy and (2) those with vitiligo who have not undergone depigmentation therapy but had considered it. Data were collected on psychosocial factors such as length of time until depigmentation therapy was offered, duration, financial burden, level of satisfaction, impact on life activities, and challenges faced during and after depigmentation therapy. DLQI scores were also measured. RESULTS: Thirty-five vitiligo patients who did not undergo depigmentation and 42 patients who did undergo depigmentation therapy were included in the study. Baseline characteristics were comparable between groups. Mean DLQI was higher for patients who did not undergo depigmentation than for those who underwent depigmentation (10.2 versus 5.3, p = 0.002), indicating worse quality-of-life in those not depigmenting. Patients who underwent depigmentation reported significantly less discomfort in various social situations after undergoing depigmentation therapy compared to how they felt before undergoing therapy and reported significantly less discomfort in these situations than patients who did not undergo depigmentation therapy. CONCLUSIONS: Despite potential challenges, depigmentation therapy appears to augment quality-of-life across various domains in individuals with vitiligo.

Examining medication ordering errors using AHRQ network of patient safety databases.

BACKGROUND: Studies examining the effects of computerized order entry (CPOE) on medication ordering errors demonstrate that CPOE does not consistently prevent these errors as intended. We used the Agency for Healthcare Research and Quality (AHRQ) Network of Patient Safety Databases (NPSD) to investigate the frequency and degree of harm of reported events that occurred at the ordering stage, characterized by error type. MATERIALS AND METHODS: This was a retrospective observational study of safety events reported by healthcare systems in participating patient safety organizations from 6/2010 through 12/2020. All medication and other substance ordering errors reported to NPSD via common format v1.2 between 6/2010 through 12/2020 were analyzed. We aggregated and categorized the frequency of reported medication ordering errors by error type, degree of harm, and demographic characteristics. RESULTS: A total of 12 830 errors were reported during the study period. Incorrect dose accounted for 3812 errors (29.7%), followed by incorrect medication 2086 (16.3%), and incorrect duration 765 (6.0%). Of 5282 events that reached the patient and had a known level of severity, 12 resulted in death, 4 resulted in severe harm, 45 resulted in moderate harm, 341 resulted in mild harm, and 4880 resulted in no harm. CONCLUSION: Incorrect dose and incorrect drug orders were the most commonly reported and harmful types of medication ordering errors. Future studies should aim to develop and test interventions focused on CPOE to prevent medication ordering errors, prioritizing wrong-dose and wrong-drug errors.

Using forensic analytics and machine learning to detect bribe payments in regime-switching environments: Evidence from the India demonetization.

We use a rich set of transaction data from a large retailer in India and a dataset on bribe payments to train random forest and XGBoost models using empirical measures guided by Benford's Law, a commonly used tool in forensic analytics. We evaluate the performance around the 2016 Indian Demonetization, which affects the distribution of legal tender notes in India, and find that models using only pre-2016 data or post-2016 data for both training and testing data had F1 score ranges around 90%, suggesting that these models and Benford's law criteria contain meaningful information for detecting bribe payments. However, the performance for models trained in one regime and tested in another falls dramatically to less than 10%, highlighting the role of the institutional setting when using financial data analytics in an environment subject to regime shifts.

Antibiotics for acne vulgaris: using instagram to seek insight into the patient perspective.

OBJECTIVES: Monitoring of public social media posts is an underutilized method to understand patients' perspectives regarding their condition and treatment. We investigated information shared by Instagram users of oral and topical antibiotics for treatment of acne vulgaris. MATERIAL AND METHODS: We performed a retrospective observational study of public Instagram posts assigned common hashtags to denote the use of antibiotics therapy for acne over nearly eight years. RESULTS: Dissatisfaction was more prevalent among users of oral antibiotics (25.6%) compared to users of topical antibiotics (9.8%), and negative tone among this group was most commonly due to lack of improvement in skin appearance. Reported side effects paralleled known side effects for oral and topical antibiotics. CONCLUSIONS: Instagram may have utility in elucidating patient behavior and attitudes. Dermatologists should increase their social media presence in order to disqualify any incorrect information endorsed in 'popular' or commonly viewed posts.

Double Down on Double Vision: An Unusual Case of Painful Diplopia.

Tolosa-Hunt syndrome (THS) is a rare neuro-immunological disorder characterized by severe periorbital headaches and ophthalmoplegia. In some patients, THS may occur in parallel with other autoimmune disorders. The underlying etiology of THS remains to be definitively established. However, inflammation of the cavernous sinus or orbital apex represents a hallmark feature; magnetic resonance imaging, therefore, plays a key role in establishing a diagnosis. We describe a patient who presented with concomitant THS and granulomatosis with polyangiitis. In addition, we describe the clinical and imaging findings of THS and review treatment options for this rare condition.

Social Media as a Surveillance Tool for Monitoring of Isotretinoin Adverse Effects.

Social media is an underutilized method for the surveillance of the patient perspective regarding their pharmacologic therapies. The purpose of this study was to investigate the nature of content posted on the social media platform Instagram with respect to the systemic acne medication isotretinoin. The search term "#accutane" was queried into Instagram to generate all public posts using this hashtag between February 1 and May 31, 2018. Four independent investigators then scrutinized posts for eligibility. Our inclusion criteria were posts written in English, accessible by URL, primarily focused on isotretinoin, and posted by users of the medication. Data regarding multiple variables (tone of post, reason for positive or negative elements, posting of a face or other body part, mention of side effects, etc.) from each individual post was then entered into a Microsoft Excel template. Of 7,661 posts, 3,082 were eligible. Among posts that contained negative tone (n=1312), this element was more commonly due to the presence of side effects (65%) than lack of improvement in skin appearance (33%). Overall, 1,263 posters (41%) mentioned adverse effects of oral isotretinoin, most commonly dry facial skin (17%), dry/cracked lips (16%), or arthralgias/myalgias (8%). Neuropsychiatric side effects were also documented, with users reporting fatigue (4%), mood changes (3%), and headache (2%). In conclusion, reported side effects of oral isotretinoin on Instagram closely tracked its known side effects in frequency. Social media may be a valuable tool to surveil the general pattern and burden of adverse effects for patients undergoing treatment of dermatologic conditions.

Incident Reports of Naming Errors among Two Sets of Infant Twins.

Newborns are at high risk for identification errors due to their inability to speak and indistinguishable features. To reduce this risk, The Joint Commission requires hospitals to use a distinct identification method for newborns. Most hospitals create medical records for newborns at birth using temporary naming conventions, resulting in patients with similar identifiers. Typically, multiple-birth infants are distinguished from their siblings by a single character (1, 2, or A, B), placing them at higher risk for identification errors, which can delay care and compromise patient safety. METHODS: We present 2 unrelated cases involving naming errors in sets of infant twins receiving care in a healthcare system using Joint Commission compliant distinct temporary naming convention. RESULTS: In the 2 cases, system failures contributed to naming errors in 2 sets of infant twins, which resulted in delayed care. In the first case, twins were inadvertently assigned the same temporary name. In the second case, an infant's blood specimen label did not include a single character, which distinguishes a multiple-birth infant from their sibling. Further safeguards are needed to reduce this risk. These cases illustrated the potential for misidentification related to newborn naming conventions during the registration process, especially between siblings of multiple-birth infants. CONCLUSIONS: Further research is needed to determine strategies to prevent newborn identification errors. Potential strategies to reduce this risk and protect newborns include improving the design of newborn identifiers, systems-level interventions such as verification alerts, and improved registration processes.