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Predictors of anti-SARS-CoV-2 seropositivity:An Egyptian population-based study

Infectious Medicine 2022年第2期1卷 113-123页

作者： Engy Mohamed El-Ghitany Ayat Ashour azza galal fargh.ly Mona H.Hashish Eman A.Omran Department of Tropical Health High Institute of Public HealthAlexandria UniversityAlexandriaEgypt Department of Family Health High Institute of Public HealthAlexandria UniversityAlexandriaEgypt Department of Microbiology High Institute of Public HealthAlexandria UniversityAlexandriaEgypt

Background:Population-based studies on the determinants of COVID-19 seroprevalence constitute a cornerstone in guiding appropriate preventive *** studies are scarce in Egypt,thus we conducted this study to explore risk factors for SARS-CoV-2 ***:This survey included 2919 participants from 10 Egyptian *** were tested for SARS-CoV-2 spike(S)and nucleocapsid(N)*** and multivariate analyses were performed to identify associated factors and predictors of seropositivity regarding sociodemographic factors,clinical data,and personal practices of participants.A subgroup analysis was performed to investigate the occupational risks of ***:Seropositivity was recorded in 1564 participants(53.6%).Independent predictors of seropositivity in-cluded non-smokers(aOR=1.817;95%CI:1.407-2.346,p=0.000),having blood group A(aOR=1.231;95%CI:1.016-1.493,p=0.034),a history of COVID-19 infection(aOR=2.997;95%CI:2.176-4.127,p=0.000),COVID-19 vaccination(aOR=4.349;95%CI:2.798-6.759,p=0.000),higher crowding index(aOR=1.229;95%CI:1.041-1.451,p=0.015),anosmia and/or ageusia(aOR=3.453;95%CI:2.661-4.481,p=0.000)and history of fever(aOR=1.269;95%CI:1.033-1.560,p=0.023).Healthcare worker and Obesity/overweight were additional significant predictors of seropositivity among the working participants(aOR=1.760;95%CI:1.301-2.381,p=0.000 and aOR=1.384;95%CI:1.059-1.808,p=0.019,respectively).Additional factors showing association with seropositivity in the univariate analysis were:female gender,age group(15-39 years),higher educational level(preparatory and above),lack of environmental disinfection and having roommates at the *** was a positive correlation between the titers of both *** was weakly corre-lated with anti-S titer,while anti-N was significantly correlated with the number of protective measures applied by the *** antibodies were significantly correlated with adult BMI,while both we

关键词： COVID-19 Predictors Seroprevalence Anti-spike Anti-nucleocapsid

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Influence of Solar Energy on Encysted Parasitic Protozoa Giardia and Entamoeba spp in Water-Treatment Plants, Egypt

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材料科学与工程（中英文B版） 2014年第10期4卷 284-292页

作者： azza Hassan Mohamed Mansour galal Gamalat Y. Osman Mohammed Aboamer Department of Zoology Faculty of Science Menoufiya University Egypt Holding Company of Water & Waste Water Menoufiya Egypt

Polluted water with parasitic protozoa (Giardia lamblia and Entamoeba histolytica) causes many serious health problems like diarrhea and gastrointestinal diseases. The present study investigated the applicability of solar energy for disinfection of parasitic protozoa in polluted water. One-side blackened bottles of two liters volume each were continuously exposed to direct sun light for about seven hours which maintained water temperature in the range of 50-60 °C that was enough for destroying most of the encysted parasitic protozoa. Complete destruction of the encysted protozoa was achieved in both bottles facing south and those vertically in position at 60 °C with an ambient temperature of 40 °C. The influence of water temperature against the viability of these two cysts was found to be highly significant (P ly those of Giardia where its regression coefficient equal -1.5 as compared to that of Entamoeba (-1.27). The low cost and operational simplicity of this study make it affordable and usable. It is more useful in rural areas where other sources of energy like electricity and gas are not easily available.

关键词：寄生原虫水处理厂贾第虫太阳能埃及胃肠道疾病贾第鞭毛虫健康问题

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