Assessing the knowledge and attitude towards HIV/AIDS among the general population and health care professionals in MENA region.

INTRODUCTION: Human Immunodeficiency Virus infection continue to represent a global health concern influenced by various social, economic, and cultural factors. The MENA are among the top regions in the world with the fastest-growing HIV epidemic. Thus, adequate knowledge and a positive attitude of people toward HIV/AIDS are of utmost importance to prevent the spreading of the disease. Accordingly, this study aims to evaluate the knowledge and attitude of the public and healthcare population toward HIV/AIDs. METHODS: A cross-sectional analysis was conducted among residents within our population from October 2018 until August 2019. An anonymous online questionnaire was used to investigate the population's demographic characteristics, HIV/AIDS-related knowledge, and attitudes toward HIV-infected patients. Participants completed a 40-item questionnaire designed to measure their knowledge and attitude toward HIV/AIDS. The data was collected via surveys, administered through electronic tablets to the participants at public places (n = 5,757) and through an online version of the questionnaire on Google Forms (n = 2500), which was sent through social media platforms. Descriptive statistics were used to analyse the data using the R-statistical software program. RESULTS: A total of 8,257 participants were included in our analysis. Saudi Arabian citizens represented 79% of the participants, while participants from the MENA countries represented 11.7% and 3% from the other Gulf Cooperation Council countries. Fifty-nine (59%) knew that HIV is a contagious infection, and 13.8% were unaware that HIV could be transmitted sexually. A few healthcare professionals reported negative attitudes toward HIV infected patients. Many risk factors, including age, gender, nationality, and education, significantly affected the knowledge and attitude scores. In this survey, we found that social media is the primary source of participants' information. CONCLUSIONS: Overall correct knowledge score of individuals about HIV/AIDS was relatively low. This study showed that the general population was knowledgeable to a certain degree about HIV/AIDS and its modes of transmission. Nevertheless, they lack a detailed understanding of the disease's nature, modes of transmission, and existing treatment. Policymakers in the region should further eliminate social discrimination and stigma in HIV-infected patients.

Effect of gamma irradiation on filtering facepiece respirators and SARS-CoV-2 detection.

To cope with the shortage of filtering facepiece respirators (FFRs) during the coronavirus (COVID-19) pandemic, healthcare institutions were forced to reuse FFRs after applying different decontamination methods including gamma-irradiation (GIR). The aim of this study was to evaluate the effect of GIR on the filtration efficiency (FE) of FFRs and on SARS-CoV-2 detection. The FE of 2 FFRs types (KN95 and N95-3 M masks) was assessed at different particle sizes (0.3-5 µm) following GIR (0-15 kGy) delivered at either typical (1.65 kGy/h) or low (0.5088 kGy/h) dose rates. The detection of two SARS-CoV-2 RNA genes (E and RdRp4) following GIR (0-50 kGy) was carried out using RT-qPCR assay. Both masks showed an overall significant (P < 0.001) reduction in FE with increased GIR doses. No significant differences were observed between GIR dose rates on FE. The GIR exhibited significant increases (P ≤ 0.001) in the cycle threshold values (ΔCt) of both genes, with no detection following high doses. In conclusion, complete degradation of SARS-CoV-2 RNA can be achieved by high GIR (≥ 30 kGy), suggesting its potential use in FFRs decontamination. However, GIR exhibited adverse effects on FE in dose- and particle size-dependent manners, rendering its use to decontaminate FFRs debatable.

Alterations in the Plasma Proteome Induced by SARS-CoV-2 and MERS-CoV Reveal Biomarkers for Disease Outcomes for COVID-19 Patients.

PURPOSE: This study aimed to understand the pathophysiology of host responses to infections caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)/(COVID-19) and Middle East respiratory syndrome coronavirus (MERS-CoV) and to identify proteins for patient stratification with different grades of illness severity. PATIENTS AND METHODS: Peripheral blood samples from 43 patients with different grades of COVID-19, 7 MERS-CoV patients admitted to the ICU, and 10 healthy subjects were analyzed using label-free quantitative liquid chromatography-mass spectrometry (LC-MS). RESULTS: We identified 193 and 91 proteins that differed significantly between COVID-19 and MERS-CoV sample groups, respectively, and 49 overlapped between datasets. Only 10 proteins are diagnostic of asymptomatic cases, 12 are prognostic of recovery from severe illness, and 28 are prognostic of a fatal outcome of COVID-19. These proteins are implicated in virus-specific/related signaling networks. Notable among the top canonical pathways are humoral immunity, inflammation, acute-phase response signaling, liver X receptor/retinoid X receptor (LXR/RXR) activation, coagulation, and the complement system. Furthermore, we confirmed positive viral shedding in 11.76% of 51 additional peripheral blood samples, indicating that caution should be taken to avoid the possible risk of transfusion of infected blood products. CONCLUSION: We identified COVID-19 and MERS-CoV protein panels that have potential as biomarkers and might assist in the prognosis of SARS-CoV-2 infection. The identified markers further our understanding of COVID-19 disease pathophysiology and may have prognostic or therapeutic potential in predicting or managing host cell responses to human COVID-19 and MERS-CoV infections.

Quantitative proteomics analysis reveals unique but overlapping protein signatures in HIV infections.

BACKGROUND: Human immunodeficiency virus-1 (HIV-1) exploits human host factors to complete its life cycle. Hence, discovery of HIV-regulated host proteins markers would better our understanding of the virus life-cycle and its contribution to pathogenesis and discovery of objective diagnostic and prognostic molecules. METHODS: We conducted holistic total proteomics analysis of three closely related study populations including patients with HIV type-1 (HIV-1) and HIV type-2 (HIV-2) as well as HIV-1 elite controllers (HIV-1-EC). Peripheral blood plasma (PBP) samples were subjected to label-free quantitative liquid-chromatography tandem mass-spectrometry (LC-MS/MS). RESULTS: Over 314 unique PBP protein species were identified of which 100 (approx. 32%) were significantly differentially expressed (≥2 to ∞ - fold-change; p < 0.05) between the three sample cohorts. Of the 100 proteins, 91 were significantly changed between pairs of HIV-1 versus HIV-1-EC, while 83 of the 100 proteins differed significantly between HIV-2 and HIV-1-EC. Interestingly, 76 proteins (87.5%) overlap between the two data sets indicating that majority of these proteins share similar expression changes between HIV-1 and HIV-2 sample groups. Two of the identified proteins, XRCC5 and PSME1, were implicated in the early phase of the pathway network for HIV life cycle, while others were involved in infectious disease and disease of signal transduction. Among them were MAP2K1, RPL23A, RPS3, CALR, PRDX1, SOD2, LMNB1, PHB, and FGB. Despite the high degree of similarity in protein profiles of HIV-1 and HIV-2, six proteins differed significantly including ETFB, PHB2, S100A9, LMO2, PPP3R1 and Vif, a fragment of virion infectivity factor of HIV-1. Additionally, 15 proteins were uniquely expressed, and one of them (LSP1) is present only in HIV-1-EC but absent in HIV1 and HIV-2 and vice versa for the rest 14 proteins. CONCLUSIONS: Altogether, we have identified HIV-specific/related protein expression changes that might potentially be capable of early diagnosis and prognosis of HIV diseases and other related infectious diseases.

Longevity of Middle East Respiratory Syndrome Coronavirus Antibody Responses in Humans, Saudi Arabia.

Understanding the immune response to Middle East respiratory syndrome coronavirus (MERS-CoV) is crucial for disease prevention and vaccine development. We studied the antibody responses in 48 human MERS-CoV infection survivors who had variable disease severity in Saudi Arabia. MERS-CoV-specific neutralizing antibodies were detected for 6 years postinfection.