Measurement of strength and durability of SARS-COV-2 antibody response is important to understand the waning dynamics of immune response to both vaccines and infection. The study aimed to evaluate the level of IgG antibodies against SARS-CoV-2 and their persistence in recovered, naïve, and vaccinated individuals. We investigated anti-spike RBD IgG antibody responses in 10,000 individuals, both following infection with SARS-CoV-2 and immunization with SARS-COV-2 AstraZeneca, Sputnik V, Sinopharm, and Sinovac. The mean levels of anti-spike IgG antibodies were higher in vaccinated participants with prior COVID-19 than in individuals without prior COVID-19. Overall, antibody titers in recovered vaccinee and naïve vaccinee persisted beyond 20 weeks. Vaccination with adenoviral–vector vaccines (AstraZeneca and Sputnik V) generates higher antibody titers than with killed virus vaccine (Sinopharm and Sinovac). Approximately two-thirds of asymptomatic unvaccinated individuals had developed virus-specific antibodies. A single dose of vaccine is likely to provide greater protection against SARS-CoV-2 infection in individuals with apparent prior SARS-CoV-2 infection, than in SARS-CoV-2-naive individuals. In addition, the high number of seropositivity among asymptomatic unvaccinated individuals showed that the number of infections are probably highly underestimated. Those vaccinated with inactivated vaccine may require more frequent boosters than those vaccinated with adenoviral vaccine. These findings are important for formulating public health vaccination strategies during COVID-19 pandemic.

Zilla spinosa is one of the most common plant species of family Brassicaceae, due to its important uses in the folk medicinal. The present study was aimed to determine some active constituents and to test antimicrobial activity of different plant extracts against pathogenic microorganisms. Fresh plant was collected randomly from northern sector of Eastern Desert, Egypt (Cairo-Suez desert road) in the month of March 2018. Phytochemical analysis of Z. spinosa showed that, it was rich in saponins and tannins (34.68 and 32.82 mg/g dry weight, respectively). While, phenolics attained values (28.22 mg/g dry weight), alkaloids (17.56 mg/g dry weight) and flavonoids (11.22mg/g dry weight). In the present study, in case of petroleum ether extract the inhibition zone varied according to type of examined bacteria. Staphylococcus aureus was the most affected bacteria followed by Stroptococcus pyogenes, Klebsiella pneumonia and Bacillus subtilis. Methylene chloride extract does not affect both K. pneumoniae and Escherichia coli but prevents others. The ethyl acetate extract inhibit S. aureus, S. pyogenes and B. subtilis. The acetone extract inhibited all the bacteria except E. coli and K. pneumonia. Methyl alcohol extract inhibited all bacteria with different inhibition zones except B. subtilis. On the other hand, Methylene chloride extract has effect on Aspergillus fumigatus. The ethyl acetate and methyl alcohol extract inhibited the growth of all tested fungi except A. niger. Acetone inhibited the growth of Mucor spp. and Candidia albicans.

A case study of patient presented with developed wound infection with Pseudomonas aeruginosa (leukocytosis). The strains of P. aeruginosa isolated from Sheffield General Northern Hospital (UK) and studied for phenotypic and genotypic identifications. This present study were conducted in Sheffield Hallam University (UK) and was aimed to evaluate the application of Phenotypic and Genotypic techniques to identify P. aeruginosa. Generally, the results of Real time PCR (RTPCR) revealed that the diagnosis viability was confirmed for P. aeruginosa. However, identification on the basis of phenotype by differences in types of growth on cetrimide and acetamide agar medium presents that both agars were conducive to the growth of P. aeruginosa. The strains of P. aeruginosa were also tested for antibiotic susceptibility to six different antibiotics, imipenem showed the greatest inhibition effect on the bacteria. It was observed that genetic techniques in accordance with phenotypic tests have facilitated to conduct a comprehensive characterization of P. aeruginosa strains obtained from a particular environment at a particular time.

Background:The A1chieve, a multicentric (28 countries), 24-week, non-interventional study evaluated the safety and effectiveness of insulin detemir, biphasic insulin aspart and insulin aspart in people with T2DM (n = 66,726) in routine clinical care across four continents.Materials and Methods:Data was collected at baseline, at 12 weeks and at 24 weeks. This short communication presents the results for patients enrolled from Qatar.Results:A total of 91 patients were enrolled in the study. Two insulin analogue regimens were used in the study. Study patients had started on or were switched to biphasic insulin aspart (n = 88), insulin detemir (n = 2), and other insulin combinations (n = 1). At baseline glycaemic control was poor for both insulin naïve (mean HbA1c: 10.9%) and insulin users (mean HbA1c: 9.1%) groups. After 24 weeks of treatment, all the study groups showed improvement in HbA1c (insulin naïve: −1.8%, insulin users: −1.3%). Major hypoglycaemia did not occur in the study patients. SADRs were reported in 1.4% of insulin users.Conclusion:Starting or switching to insulin analogues was associated with improvement in glycaemic control with a low rate of hypoglycaemia.