All Articles in july, 2026

Fenvalerate is a widely used synthetic pyrethroid insecticide with recognised toxicity to aquatic organisms. This study evaluated its toxic effects on zebrafish (Danio rerio) by assessing mortality, biochemical alterations, and protein profile changes following exposure to 20–100 µg/L fenvalerate. Mortality increased in a concentration- and time-dependent manner. At 20 µg/L, mortality increased from 55% at 24 h to 82% at 96 h, while 40 and 60 µg/L resulted in mortality rising from 62% to 94% and 71% to 99%, respectively. Exposure to 80 µg/L caused 79–100% mortality, and complete mortality was observed at 80 and 100 µg/L after 72 and 96 h, respectively. Sublethal (LC50) exposure induced significant biochemical changes in gill and muscle tissues. Gill protein content decreased from 120.0 ± 1.22 mg/g in controls to 110.0 ± 1.40 mg/g after 96 h, whereas muscle protein declined from 80.2 ± 1.3 to 60.0 ± 2.7 mg/g. Lipid reserves were also markedly reduced, with muscle lipid content decreasing from 4.0 ± 0.46% to 3.1 ± 0.12% and gill lipid content from 6.5 ± 0.22% to 2.5 ± 0.31% after 96 h. SDS-PAGE analysis revealed distinct alterations in protein banding patterns between control and treated fish, indicating fenvalerate-induced changes in protein expression. These findings demonstrate that fenvalerate causes severe concentration- and time-dependent toxicity, leading to increased mortality, depletion of proteins and lipids, and altered protein profiles, highlighting its ecological risk to aquatic organisms and the utility of zebrafish as a sensitive model for pesticide toxicity assessment.

Introduction: In the Republic of Congo, Mombénzélé village’s an area endemic for cholera where environmental and socio-economic factors favor the persistence of the epidemic. This study assessed the knowledge, attitudes, and practices (KAP) of the indigenous peoples of Mombénzélé regarding cholera to design culturally appropriate and sustainable prevention strategies.Materials and methods: This was a preliminary cross-sectional pilot study, descriptive and analytical in nature, conducted from April 21 to 31, 2026, in the indigenous community of Mombénzélé (Impfondo district, Republic of Congo). The study assessed adults. Convenience sampling was used. Data were collected via a questionnaire in Lingala and face-to-face interviews, with secure data entry on tablets. Analysis using SPSS, including socio-demographic profiles, KAP variables, and chi-square tests (p < 0.05), was conducted in strict compliance with ethical principles and anonymization guidelines. Results: The population studied is predominantly male (60%) and without formal education (92%). Cholera is largely unknown to 92% of individuals, who believe exclusively in mystical causes. Hygiene practices are dangerous, with a complete lack of water treatment (100%) and systematic recourse to traditional healers (60%). Vulnerability is exacerbated by open defecation (56% in the river) and a refusal to use chlorinated water (88%). Sociodemographic factors significantly influence behaviors, notably age, which impacts funeral practices (p = 0.033), and educational level, which determines access to the river (p = 0.0033). The main activity influences the consumption of treated water (p = 0.0218) and determines (p = 0.000026) funeral practices. Household size impacts the perception of cholera lethality (p = 0.009) and guides the choice of funeral practices (p = 0.045).Discussion: A cholera epidemic has struck the Mombénzélé village, affecting 96% of adults and exacerbated by a complete lack of awareness of the symptoms and a rejection of chlorinated water. The health crisis has driven 76% of the population to traditional medicine. Conclusion: To contain the health crisis in Mombénzélé, it’s essential to deploy a strategy combining the training of bilingual mediators and the improvement of water infrastructure, in order to overcome the lack of information on the transmission of cholera and to adapt prevention to the realities and cultural barriers of the indigenous community.

Monoclonal gammopathy of undetermined significance (MGUS) may be associated with peripheral neuropathy; however, IgG MGUS–associated chronic inflammatory demyelinating polyneuropathy (CIDP) is uncommon and generally follows a slowly progressive or relapsing course. We report a man in his early 40s who developed rapidly progressive sensorimotor weakness resulting in quadriparesis and inability to ambulate within eight weeks. Examination demonstrated severe proximal and distal weakness, glove-and-stocking sensory loss, and absent reflexes. Cerebrospinal fluid protein was markedly elevated, and nerve conduction studies/electromyography demonstrated acquired demyelination with secondary axonal loss. Evaluation identified IgG MGUS, supporting the diagnosis of MGUS-associated CIDP after alternative etiologies were excluded. Intravenous immunoglobulin was discontinued on day 3 following the development of a pulmonary embolism. The patient subsequently completed eight plasma-exchange sessions, with improvement in lower-extremity strength to 3/5, upper-extremity strength to 4/5, and sensory symptoms. He was discharged to rehabilitation with planned monthly plasma exchange.recognised clinical spectrum of IgG MGUS–associated CIDP and demonstrates that meaningful neurological improvement may occur with plasma exchange despite rapid progression and severe initial disability.

While canine pets offer significant psychological and physical benefits to their owners, especially children, there are well-documented health risks associated with pathogens that can be transmitted to humans.To determine the prevalence of intestinal parasites, with an emphasis on zoonotic ones, in children and their dogs, and to identify risk factors associated with infection, a cross-sectional descriptive study was conducted in children from primary schools in the Cerro municipality, province of Havana. One hundred and three children (36 with dogs and 67 without pets) from fifth and sixth grades were selected. Three stool samples were collected on alternate days, and one stool sample was collected from their pets using conventional coproparasitological techniques between September and December 2023. The results showed a prevalence of 38.8% of intestinal parasites in the children studied. Blastocystis spp. (30.1%) and Giardia duodenalis (17.5%) were the most prevalent zoonotic species. Ancylostoma caninum (8.3%) was the most frequent zoonotic parasite in dogs. Male sex was the only variable that showed statistical significance, associated with a higher risk of infection. There were no significant differences in the prevalence of intestinal parasites in the group of children with dogs compared to those without pets, and no statistical association in the analyzed epidemiological variablesIt is important to develop a One Health approach for the control of these zoonoses, as dogs can act as important sentinels of public health.

Psychiatric disorders represent some of the most biologically complex challenges in medicine, arising from intricate interactions among genetic, epigenetic, environmental, developmental, and social factors. Advances in artificial intelligence (AI) have improved our ability to analyze large-scale biological datasets, identify biomarkers, and support precision medicine initiatives. However, the growing volume and complexity of genomic and multi-omic information increasingly challenge the capabilities of even the most advanced conventional supercomputers. Quantum computing offers a potential next step in biomedical discovery by enabling rapid analysis of multidimensional datasets, molecular simulations, and optimization problems relevant to genetic medicine and gene therapy. Extending these findings conceptually, we propose the forward-looking hypothesis that continued advances in quantum computing may eventually complement artificial intelligence and human expertise to facilitate increasingly sophisticated analyses relevant to psychiatric genetics and precision medicine. At present, no direct evidence of which we are aware demonstrates clinical implementation of quantum computing in psychiatric genomics. Accordingly, the concepts discussed in this Opinion should be viewed as a forward-looking scientific perspective that builds upon current advances in computational science and biomedicine while awaiting future experimental and clinical validation. Importantly, these advances should complement rather than replace human expertise. Human-in-the-loop systems remain essential for ensuring scientific rigor, ethical oversight, clinical judgment, and patient-centered care. The convergence of quantum computing, AI, genetic medicine, and human expertise may ultimately establish a transformative framework for future precision psychiatry and mental health therapeutics.