High-level production of violacein by the newly isolated Duganella violaceinigra str. NI28 and its impact on Staphylococcus aureus

A violacein-producing bacterial strain was isolated and identified as a relative of Duganella violaceinigra YIM 31327 based upon phylogenetic analyses using the 16S rRNA, gyrB and vioA gene sequences and a fatty acid methyl ester (FAME) analysis. This new strain was designated D. violaceinigra str. NI28. Although these two strains appear related based upon these analyses, the new isolate was phenotypically different from the type strain as it grew 25% faster on nutrient media and produced 45-fold more violacein. When compared with several other violacein producing strains, including Janthinobacterium lividum, D. violaceinigra str. NI28 was the best violacein producer. For instance, the crude violacein yield with D. violaceinigra str. NI28 was 6.0 mg/OD at 24 hours, a value that was more than two-fold higher than all the other strains. Finally, the antibacterial activity of D. violaceinigra str. NI28 crude violacein was assayed using several multidrug resistant Staphylococcus aureus. Addition of 30 mu M crude violacein led to a 96% loss in the initial S. aureus population while the minimum inhibitory concentration was 1.8 mu M. Consequently, this novel isolate represents a phenotypic variant of D. violaceinigra capable of producing much greater quantities of crude violacein, an antibiotic effective against multidrug resistant S. aureusopen

Determining factors affecting deaths caused by traffic accidents in the south of Kerman Province

Background and Objectives: To preventing deaths, it is essential to recognize factors affecting the survival of road accident victims. This study was conducted to identify the factors affecting the mortality of road accident victims.   Methods: All pre-emergency mission forms and hospital records of road accident victims were analyzed. The dependent variable was the time interval between the accident and death or discharge from hospital. The forms included demographic variables, accident location, injury status, type of vehicle, type of trauma, mission time, and vital signs.   Results: Of 8920 injured persons, death occurred in 143 (95% CI: 0.014-0.019). Being over 65 years (Hazard Ratio (HR) 7.6, 95% CI: 3.14-18.4), accident on the main roads (HR 1.44, 95% CI: 0.6-3.5), tracheal intubation (HR 26.4, 95% CI: 3.05-227.6), a systolic and diastolic blood pressure above 100 (HR 0.4, 95% CI: 0.4-0.12) and 70 mm Hg (HR 0.53, 95% CI: 0.24-1.2), and heart rate>100/min (HR 3.0, 95% CI: 1.7-5.1) were associated with the risk of death.   Conclusion: In providing services, age, status of blood pressure, pulse, injury status, and type of trauma can affect the patients’ survival

Psychosocial status during the prevalence of COVID-19 disease: the comparison between healthcare workers and general population

The prevalence of COVID-19 disease continues to be a significant psychosocial status among health care workers (HCWs) and the general population worldwide. This cross sectional study aimed to compare the psychosocial status between healthcare workers and general population during the prevalence of COVID-19 disease in southeast Iran. Totally 415 health care workers of a medical service center for COVID-19 patients and 1023 people of general population participated in the study. An online socio-demographic characteristics questionnaire, General Health Questionnaire (GHQ �28), and Generalized Anxiety Disorder 7-item (GAD-7) were utilized to evaluate psychosocial status. According to GHQ, the psychological disorders of the HCWs were significantly higher than that of the general population (P < 0.001). According to GAD-7, no significant difference was found between general population and HCWs. Multivariate logistic analysis showed no difference between general population and HCWs in the psychological disorder. Although HCWs suffered from psychological disorders more than general population, nearly one third to half of the participants in both groups had psychosocial disorders. © 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature