Postoperative nosocomial COVID-19 infection in surgical patients during pandemic: A prospective observational cohort study.

Unlabelled: Background: increased pressure on healthcare systems and possible risk of nosocomial COVID-19 infection during pandemic urged many guidelines to severely restrict the number of operations. The aim of this study was to investigate the risk of COVID-19 infection and its complications in patients undergoing urgent or elective operations.Methods: a prospective observational cohort study was conducted in a tertiary surgical center and all patients with no preoperative history of COVID-19 undergoing elective or emergent surgeries were included in this investigation.

Improving Student's Self-Efficacy and Perceived Susceptibility Toward Oral and Dental Health: A Randomized Controlled Trial.

Objectives: We sought to assess the impact of educational intervention on female junior high school students' perceived susceptibility and self-efficacy regarding oral and dental health.

Methods: We recruited 100 female junior high school students (50 in intervention and 50 in control group) from Falavarjan city using multistage random sampling. A self-administered questionnaire was used to gather data about study variables.

Effects of niacin on milk production and blood parameters in early lactation of dairy cows.

To investigate the effects of niacin supplementation in the diet of high producing cows at early lactation, 21 holstein dairy cows were used in this experiment. Animal were assigned in to three groups based on their milk yield and calving date soon after parturition. They were received a basal diet and 0 (group 1), 6 (group 2), 12 (group 3) g of supplementation niacin per day over a 10 weeks experimental period.

Effects of monensin and increasing crude protein in early lactation on performance of dairy cows.

Twenty-four Holstein dairy cows were used to evaluate the singular and combined effects of different level of crude protein and monensin treatments during the early lactation on digestion and milk yield of dairy cows. The experiment was designed as completely randomized with a 3x2 factorial arrangement of treatments. The factors were three Concentrations of CP supplement (19.