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Hydrogel-based formulations hold significant promise for treating ocular diseases that impact the posterior segment of the eye. These formulations exhibit the ability to surmount ocular barriers and offer sustained drug release, rendering them efficacious drug delivery systems. This article addresses the challenges linked to treating disorders affecting the posterior eye segment and underscores the imperative for less invasive drug delivery methodologies. We further delve into diverse contemporary ocular dosage forms, encompassing gels, nanostructures, and implants, with a specific emphasis on hydrogels. Hydrogels offer several merits, including precise targeting, sustained release, enhanced bioavailability, and non-invasiveness. Moreover, they curtail the risk of adverse effects and foster patient adherence. An enthralling advancement is the amalgamation of hybrid drug delivery systems, integrating nanoparticles, liposomes, dendrimers, and stimuli-activated nano-systems, with hydrogels for posterior eye ailment treatment. These hybrid nano-systems exhibit promise in enhancing drug stability, prolonging drug release, and pinpointing specific tissues within the posterior segment. We also provide an overview of ongoing clinical trials and approved hydrogel-based drug delivery systems, like Retisert and Ozurdex. These systems have demonstrated efficacy in managing chronic non-infectious uveitis, Age-related Macular Degeneration (AMD), and diabetic macular edema. Nevertheless, challenges persist, including optimizing bioavailability, maintaining drug stability, and implementing personalized treatment approaches. The incessant evolution of gel-based drug delivery systems stands to substantially enhance patients’ quality of life and establish new benchmarks in treating posterior eye diseases. The future of ophthalmology brims with excitement, as gel-based drug delivery systems hold the potential to revolutionize ocular therapies, providing effective remedies for an array of vision-related afflictions.

Diarrheal diseases continue to be the major cause of morbidity and mortality among children under 5 years. This study aimed to isolate, identify and determining the prevalence, antimicrobial susceptibility profile of Shigella sp associated with acute diarrhea among children in Kano, Northern Nigeria. A cross sectional study was conducted among children less than 5 years diagnosed with acute diarrhea and admitted to paediatric ward of Murtala Muhammad Specialist Hospital Kano. Stool samples from a total of 37 (20 male and 17 female) subjects were used to isolate and identified the pathogen. Antimicrobial susceptibility test was conducted using disc diffusion method. The result showed 12 out of 37 samples were positive for Shigella sp which accounted for 32.4%. Higher incidence of Shigella sp was found among subjects of age between 2 – 3 years. The isolates were 100% resistant to Ampicillin. High resistance was also observed in Amoxicillin (83.33%), Chloramphenicol (58.33%) and Tetracycline (25%). The isolates are 100% sensitive to ciprofloxacin, 66.7% to Levofloxacin and Gentamicin each and 58.33% to Erythromycin. Three (3) isolates were resistance to Ampicillin and Amoxicillin, 5 isolates were resistance to Ampicillin, Chloramphenicol and Amoxicillin while 2 isolates were resistance to Ampicillin, Chloramphenicol, Tetracycline and Amoxicillin. It is concluded that Shigella sp is one of the etiological agent of diarrhea in children. Ciprofloxacin, levofloxacin and Gentamicin are drugs of choice for treating diarrhea caused by Shigella sp.

One of the major challenges for vaccine producing companies is having favourable conditions for efficient expression system for living organisms in order to produce biologicals. Several companies across the globe looking for several alternative sources for better yield through efficient expression based system.

Introduction - the perennial pandemic: It is being increasingly realised that the COVID-19 may have become the new reality associated with human existence world over and the mankind may have to live with it for years or even decades. Further, the grievous nature of the disease is evolving further with the genomic changes in the virus in form of mutations and evolution of variants, with enhanced infectivity and probably virulence. There are serious challenges posed by the SARS-CoV-2 virus and COVID-19 as the disease. COVID-19 as acute and chronic disease: On exposure to the SARS-CoV-2 virus, not all patients develop a disease. Further, for those who develop the disease, there is a large variation in disease severity. The known factors including the constituent factors and several still unknown factors influence the disease manifestations, its course, and later the convalescent phase as well. In fact, substantial continuing morbidity after resolution of the infection indicates persisting multisystem effects of COVID-19. The ‘long COVID-19’ or ‘long haulers’: The patients who continue to suffer with persisting symptoms have been described as long haulers and the clinical condition has been called post-COVID-19 or ‘long COVID-19’. The diagnosis should be entertained if various symptoms and signs linger well beyond the period of convalescence in COVID-19. With the chronicity, there occur inflammatory changes and damage in various organs, and the extent of organ damage determines the long-term effects. Management of ‘long COVID’ syndrome: The ‘long COVID’ syndrome has multi-system involvement, variable presentation, and unpredictable course. Following clinical and investigational assessment, the patients should be managed as per clinical manifestations, extent of organ damage and associated complications. The findings from various studies indicate that preventing further organ damage in ‘long COVID’ is crucial. The long COVID’s prognostic challenges: As apparent, the ‘long COVID’ afflictions are more common than realized earlier. The symptoms can escalate in patients with co-morbid conditions. The persistent symptoms among COVID-19 survivors pose new challenges to the healthcare providers and may be suitably managed with a combination of pharmacological and non-pharmacological treatments, and holistic healthcare. 

Vitamin A is a fat-soluble discovered in 1913. Hypo-vitaminosis A can cause blindness by various mechanisms. The aim of this case report is to emphasize the severity of Vitamin A deficiency and its local consequences on the eyes causing corneal ulcerations, abscess and even blindness.

Background: The patient in this study experienced a childhood marked by conflicts within the family, physical abuse, frequent changes of school settings, truancy, and unspecified learning disabilities. After leaving school at age 17, she was chronically depressed, had anger attacks, lacked motivation, refused psychological assistance, and had problems finding work. At age 30, this culminated in an aggravated assault of a female in an urban public space, after which she was referred to the criminal courts. She was granted probation and hospitalized for psychiatric evaluation with follow-up, outpatient psychiatric treatment. Aim: To present outcomes of longitudinal monitoring of methylphenidate effects on cognition and self-regulation during treatment of attention-deficit disorder with hyperactivity and substance use. Methods: During more than a year of treatment, psychiatric interviews and norm-referenced assessments of processing-speed and cognitive overhead monitored changes in cognition and substance use. Results: At baseline, processing-speed measures of reactive and active attention were within the average-normal range, whereas cognitive overhead/shift cost was in the atypically high range, suggestive of ADHD symptomatology. The patient engaged in daily excessive use of cannabis, amphetamines, and other illegal substances. At the end of treatment, cognitive speed was increased and cognitive overhead normalized. With reductions in ADHD symptomatology, the patient used small amounts of cannabis during weekends and showed improved self-regulation, and legal restrictions were discontinued.

Pulmonary hypertension (PH) in sickle cell disease (SCD) is associated with a mortality rate of 37%. There is an upregulation of adhesion molecules which leads to the expression of endothelin-1, a potent vasoconstrictor. A prospective, descriptive study was done to determine the safety and efficacy of macitentan in patients with SCD and PH. Continuous variables were reported as mean ± SEM or percentage where appropriate. We screened 13 patients and recruited five. All five patients were adults. Data were analyzed as appropriate by student t - test. Statistical significance was assumed at p < 0.05. Baseline pulmonary hemodynamics obtained by right heart catheterization and systemic hemodynamics were (± SEM): mean pulmonary artery pressure (MPAP) 32 ± 8 mmHg, right atrial pressure (RAP) 9 ± 4 mmHg, pulmonary vascular resistance (PVR) 257 dynes-sec/cm5 and CI 3·7 ± 0.39 l/m2. Of all parameters, only PVR and 6-min walk distance changed significantly. For the group, MPAP decreased by 15.6%, PVR by 22.5% and RAP by 25.5%. The 6-minute walk distance increased over sixteen weeks except in Patient 4 who had a 3% decrease. The mean walk distance increased in the total distance, from 464 ± 158 meters to 477 ± 190 meters (p .123). In four patients, the adverse events were mild to moderate and did not lead to study drug discontinuation. Significant improvement in pulmonary hemodynamics and exercise capacity in patients with SCD-related pulmonary arterial hypertension. We found that macitentan was safe and well tolerated.

COVID-19 created a public health crisis shutting down many normal day-to-day activities and adversely affecting life, as we know it. Not only did this affect vulnerable, senior populations and people with poorly managed diabetes and hypertension [1-4], it displaced nursing students from clinical experiences putting them at risk of not graduating. Given the projected shortages of RNs in 2030, in California alone of 44,500 FTEs [5], this delay would have added a ripple effect increasing already dire predictions. This displacement created an emergency and with the aid of the Board of Registered Nursing, Assembly Bill 2288 [6] passed allowing student nurse clinical experience requirements to be revised to help meet graduation requirements.

Background: Despite its negative effects, approximately 23% of Palestinians (≥ 18 years) smoke cigarettes. Studies have shown physicians to be an important channel for smoking cessation intervention. This investigation examines physicians’ smoking-related knowledge, attitudes, and behaviors in the Gaza strip (Palestinian Territories). Methods and findings: A convenience sample of 154 physicians in medical and surgical units took part in this investigation (87.7% response rate). The data show that 37.8% of physicians in Gaza smoke, and most of them about 72% smoke in the hospital’s public spaces, thereby implicitly giving public approval for smoking. While 82.4% reported that they advise patients who smoke to stop, the majority (59%) also believe that their own smoking habits negatively influence the impact of that advice. Unfortunately, our survey showed that physicians’ knowledge levels towards smoking addiction and management were lower than expected (e.g. only 34% knew that nicotine dependence is a psychiatric disorder that necessitates treatment). The physicians in this study believed that the primary barriers to failure of their patients’ smoking cessation were the perceived lack of will (81.3%), and the strength of patients’ addiction (67.9%). Moreover, (61%) of physicians did not spend enough time to convince their patients to quit smoking. Conclusion: Smoking is common among Gaza-strip physicians, and unfortunately, most of them smoke in the hospital’s public spaces. Many obstacles face the smoking cessation program that some physicians linked it to patients, and others linked it to the health-care system. Furthermore, smokers in Gaza receive poor care regarding assessment, referral, and management of their smoking habit.

Einstein’s special and general relativity revolutionized physics. The predictions of general relativity are Strong Lensing, Weak Lensing, Microlensing, Black Holes, Relativistic Jets, A Gravitational Vortex, Gravitational Waves, The Sun Delaying Radio Signals, Proof from Orbiting Earth, Expansion of the universe. The density of the universe determines the geometry and fate of the universe. According to Freedman’s equations of general relativity published in 1922 and 1924, the geometry of the universe may be closed, open and flat. It all depends upon the curvature of the universe also. Various results of Cosmic Microwave Background Radiation (CMBR), NASA’s Wilkinson Microwave Anisotropy Probe (WMAP), and ESA’s Planck spacecraft probes found that our universe is flat within a margin of 0.4% error. In this short work, by applying the laws of quadratic equations, we attempt to show that OUR UNIVERSE IS FLAT.