The SARS-CoV-2 is a novel strain of coronavirus which is ravaging many countries, and this has become a global public health concern. With the increasing number of COVID-19 confirmed cases and deaths in Nigeria, the pandemic has led to massive public reactions. This data attempted to evaluate the knowledge, impacts, and government intervention during the pandemic. An online survey was conducted using a questionnaire shared via social media using a Snowball sampling technique. The data were analyzed using descriptive statistics and analysis of variance (ANOVA). A total of 387 responses was received. Results show that a significant number of respondents had adequate knowledge about COVID-19 modes of transmission, symptoms, and preventive measures. Respondents maintain personal hygiene as 67% wash their hands with soap. The pandemic has caused worry (65%), anxiety (42%), panic (35%), and depression (16%) among respondents, even as government intervention is seen as inadequate by 70%. There is a need for mental health support and increased information campaigns about COVID-19.

Organophosphate pesticides, commonly used in large scale farming, have been found to be major contaminants in aquatic environment. Clarias gariepinus was exposed to acute and sublethal concentrations of phostoxin and DD Force to evaluate single and joint action toxicity of the organophosphates. Effects of phostoxin and DD force on antioxidant enzymes, fish organs and acetylcholinesterase levels in fingerlings and juveniles of C. gariepinus were also investigated. The lethal concentrations (96 h LC50) for phostoxin and DD Force were 0.631 and 1.759 mg/l, respectively. The results obtained from the bioassay showed that phostoxin was 2.8× more toxic than DD Force after exposure of C. gariepinus. Joint action toxicity evaluations of phostoxin and DD Force showed that the interaction between the chemicals was synergistic (RTU >1). The biochemical responses in the exposed fish differed significantly (P < 0.05) from the control fish. The result of acetylcholinesterase study revealed significant difference between acetylcholinesterase levels in the exposed fish and control, with reduction in the acetylcholineterase level in fish exposed to sublethal concentrations of phostoxin and DD Force. Haematological studies revealed an increase in WBC, RBC, PCV and platelets in the exposed fish. Histopathology of the gills showed shortened primary lamellae, loss of secondary lamellae and loss of ceratobrachial bones. In the acute toxicity studies, respiratory stress, erratic swimming and instant death of fish were observed in the exposed fish. This study reveals that changes in histopathology and acetylcholinesterase level are good biomarkers and can be successfully used to detect exposure to organophosphates pesticides in fish.

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This paper investigated awareness and adoption levels of improved smoking oven among fish processors in four fishing communities along Lagos Lagoon, Nigeria. Multi-stage sampling procedure was used to select 153 respondents who were engaged in fish smoking. Data collected using structured interview guides were subjected to descriptive and inferential analyses. Results revealed that majority of the respondents were young, married women with average fish smoking experience of 22.6 years. Majority (90.8%) of them were solely engaged in fish smoking while 9.2% combined fish smoking with other income-generating activities. All the processors used traditional smoking oven (drum, box and mud ovens). More than 66.0% of the fish processors were not aware of improved fish smoking equipment. Lack of awareness, inadequate access to the technologies, low relative advantage and lack of maintenance services and high cost of procurement were responsible for low adoption levels of improved smoking oven. Irregular visits of extension agents to the study area had negative impact on the adoption of improved traditional smoking ovens. Proper dissemination of innovations developed on improved fish processing equipment to the active fish processors in Lagos State using available communication channels is hereby advocated.

Humans in modern society are exposed to an ever-increasing number of electromagnetic fields (EMFs) generated from the production and supply of electricity, television sets, personal computer (PC), radio communication, and mobile communication, hence, it has become a public health issue. This study was conducted to evaluate the effects of electromagnetic radiation (EMR) emitted from new generation laptop computers on sperm quality and reproductive hormone of male albino rats. Male albino rats (10-12 weeks old) were exposed to RF-EMR from laptop computers which were grouped based on different exposure period (2hours, 4hours, 6hours and 8hours) for 4 weeks. The semen samples were obtained by caudal puncture of the epididymis from each participant for sperm quality analysis and blood collected by cardiac puncture for hormonal analysis using the chemiluminescent microparticles immunoassay method. The analysis of variance was done for the hormonal concentration and sperm quality parameters to check for the significance difference at 5% level of significance. The Dunnett’s multiple comparison test was done to test for significance comparison of radiation exposed groups and control group. Exposure to laptop computer display unit was associated with significant reduction in sperm motility, sperm viability and sperm count (P<0.0001), testosterone level (P<0.001), follicle stimulating hormone level (P<0.01). For the sperm morphology, there was no significant difference in the normal cells for the experimental setup, however, the appearance of abnormal cells in the exposed rats (2 – 8 hrs) were significant (P≤0.001). This study therefore showed that EMR from a charging laptop can significantly affect semen quality, male fertility and rendered male reproductive hormone unstable with no effect on prostrate specific antigens.