Occurrence of fungal microbial contamination in drinking water of megacity of Karachi (Pakistan) and their physico-chemical control.

The water quality in Karachi (Pakistan) is uncertain due to the occurrence of fungi and other microorganisms. A total of twenty-five water samples were collected from public places, educational institutes, hospitals, water supply systems and surface water of the canal of Karachi (Pakistan). The different fungal species including Acremonium sp., Alternaria alternata, Aspergillus flavus, A. fumigatus, A. sulphureus, Cladosporium sp., Fusarium sp., Clonostachys (Gliocladium) sp., Macrophomina phaseolina, Mucor racemosus, Paecilomyces sp. Penicillium chrysogenum, P. citrinum, P. commune, P. expansum, Rhizoctonia sp. and Stachybotrys sp. were isolated from these drinking water samples. However, the bacteria, microalgae and some other microorganisms were present in low concentrations. The reason for fungi infection and production of mycotoxicity depends upon various factors and the availability of their nutrients in filtration plants. The major threats to human health are fungal mycotoxicity which is responsible for carcinogenic and other lethal diseases. Mostly, the genus Aspergillus was dominated and isolated with a maximum of 88-98% of occurrence in the different samples of drinking water by the direct plate-spread method. For the control of fungi, various Physico-chemical coagulation treatments were used, but Potassium alum, clay pot, and hot water treatment disinfected effectively 69-70% removal of the fungi and its spore or mycelia from the water. In addition, it is concluded that drinking water purifications such as chlorination, filtration and lime did not eliminate thermophilic fungal spores or mycelia including Penicillium, Paecilomyces and Mucor from the water.

Experiences and Unmet Needs of Adolescent and Young Adult Survivors of a Brain Tumor (Aged 15-39 Years): A Systematic Review and Meta-ethnography.

BACKGROUND: Brain tumors account for 15% of all adolescent and young adult cancers, and survivors are at risk of ongoing late effects that can severely impact their ability to reach independence. Despite follow-up initiatives advocating a personalized approach, survivors continue to experience ongoing sequelae. A better understanding of the survivorship experience is required to ensure services are able to deliver personalized support. OBJECTIVE: The aim of this systematic search and meta-ethnography was to identify and synthesize qualitative studies to better understand the experiences, perspectives, and needs of adolescent and young adult brain tumor survivors. METHODS: Five databases were searched using predefined criteria, studies were independently screened by two researchers, and those meeting inclusion criteria were synthesized. RESULTS: Twenty-seven studies were synthesized, generating 2 main themes, each with subthemes: (1) individual factors impacting resilience, namely, positive coping styles, managing emotions, and family functioning, and (2) cancer-related factors that challenge the individual, namely, living with societal expectations and barriers to coping. CONCLUSION: The conceptual framework illustrates the challenges and resilience of survivors along the continuum from adolescence to adulthood, reflecting the needs of this age group in 1 model, despite it being a time of rapid growth. The lack of awareness of potential physical and emotional late effects challenges individual resilience, which is further challenged when significant milestones cannot be reached. IMPLICATIONS FOR PRACTICE: There is a role for follow-up services to identify and address unmet needs, provide better information to equip survivors to manage late effects, and support families, particularly those who underwent more intensive treatment.

Adverse effects of psychedelics: From anecdotes and misinformation to systematic science.

BACKGROUND: Despite an increasing body of research highlighting their efficacy to treat a broad range of medical conditions, psychedelic drugs remain a controversial issue among the public and politicians, tainted by previous stigmatisation and perceptions of risk and danger. OBJECTIVE: This narrative review examines the evidence for potential harms of the classic psychedelics by separating anecdotes and misinformation from systematic research. METHODS: Taking a high-level perspective, we address both psychological and psychiatric risks, such as abuse liability and potential for dependence, as well as medical harms, including toxicity and overdose. We explore the evidence base for these adverse effects to elucidate which of these harms are based largely on anecdotes versus those that stand up to current scientific scrutiny. RESULTS: Our review shows that medical risks are often minimal, and that many - albeit not all - of the persistent negative perceptions of psychological risks are unsupported by the currently available scientific evidence, with the majority of reported adverse effects not being observed in a regulated and/or medical context. CONCLUSIONS: This highlights the importance for clinicians and therapists to keep to the highest safety and ethical standards. It is imperative not to be overzealous and to ensure balanced media reporting to avoid future controversies, so that much needed research can continue.

Stem Cell-Based Therapeutic Approaches to Restore Sensorineural Hearing Loss in Mammals.

The hair cells that reside in the cochlear sensory epithelium are the fundamental sensory structures responsible for understanding the mechanical sound waves evoked in the environment. The intense damage to these sensory structures may result in permanent hearing loss. The present strategies to rehabilitate the hearing function include either hearing aids or cochlear implants that may recover the hearing capability of deaf patients to a limited extent. Therefore, much attention has been paid on developing regenerative therapies to regenerate/replace the lost hair cells to treat the damaged cochlear sensory epithelium. The stem cell therapy is a promising approach to develop the functional hair cells and neuronal cells from endogenous and exogenous stem cell pool to recover hearing loss. In this review, we specifically discuss the potential of different kinds of stem cells that hold the potential to restore sensorineural hearing loss in mammals and comprehensively explain the current therapeutic applications of stem cells in both the human and mouse inner ear to regenerate/replace the lost hair cells and spiral ganglion neurons.