Ethnicity-related stereotypes and their impacts on medical students: A critical narrative review of health professions education literature.

BACKGROUND: Stereotypes are oversimplified beliefs about groups of people. Social psychology concepts and theories describing ethnicity-related stereotypes are well reported in non-medical educational settings. In contrast, the full impact of stereotyping on medical students, and the extent to which they were represented in health professions education (HPE) is less well-described. Using the lens of social psychological theory, this review aimed to describe ethnicity-related stereotypes about medical students portrayed in HPE literature and the impacts of those stereotypes. METHODS: A critical narrative approach was undertaken. Social psychology concepts and theories were used as a framework through which to review the impacts of ethnicity-related stereotypes on medical students as described in HPE literature. A database search of Ovid MEDLINE, JSTOR, Project Muse, and PsychINFO was conducted to identify both theoretical and empirical articles relating to this topic in the HPE literature. Data was synthesised using thematic analysis, giving particular care to appraise the evidence from perspectives in social psychology. FINDINGS: In HPE, the experiences and impact of stereotyping on learners from minority ethnic groups was explained by social psychology concepts such as stereotype threat, stereotype reactance, attributional ambiguity, self-fulfilling prophecy, stereotype boost, stereotype lift, and stereotype masking. Stereotype boost and stereotype lift were particularly described among students who identified as White, whereas stereotype threat was described more commonly among students from minority ethnics groups. The impact of stereotyping is not just on assessment, but may be across all teaching and learning activities at medical school. INTERPRETATION: Social psychology concepts and theories can be used to describe the experience and impact of ethnicity-related stereotypes in HPE. Educators can better support learners from minority ethnic groups by self-reflecting over assumptions about individuals from minority ethnic groups, as well as minimise the impact of stereotyping and bias to create more inclusive learning environments.

Antiplasmodial Activity of Some Medicinal Plants Used in Sudanese Folk-medicine.

Ten plants indigenous to Sudan and of common use in Sudanese folk-medicine, were examined in vitro for antimalarial activity against schizonts maturation of Plasmodium falciparum, the major human malaria parasite. All plant samples displayed various antiplasmodial activity. Three plant extracts caused 100% inhibition of the parasite growth at concentrations of plant material

Effect of energy and protein density of prepartum diets on fat and protein metabolism of dairy cattle in the periparturient period.

To determine if increased nutrient density in prepartum diets improves nutrient balance of peripartum cows, we blocked 40 Holstein cows and 40 heifers by expected date of parturition and assigned them randomly within blocks to one of four treatment diets varying in density of net energy for lactation (NEL) and crude protein (CP). Diets were 1.30 Mcal of NEL/kg and 12.2% CP, 1.49 Mcal of NEL/kg and 14.2% CP, 1.61 Mcal of NEL/kg and 15.9% CP, and 1.48 Mcal of NEL/kg and 16.2% CP. These diets were fed ad libitum from 25 d prepartum until parturition, and all cows were fed the same diet after calving. Increased nutrient-density of prepartum diets did not decrease feed intake. Compared to animals fed the lowest density, those fed the highest density consumed more NEL (20 vs. 14 Mcal/d) and gained more body condition, backfat, and body weight. They also had less nonesterified fatty acids in plasma (176 vs. 233 microM) and more insulin-like growth factor-I in plasma (472 vs. 390 ng/ml) during the last 2 wk prepartum and less triglyceride in liver at parturition (0.9 vs. 1.5%, wet tissue basis). Quadratic effects of energy density were not observed, and the addition of protein in the medium energy diet had no effect. Prepartum diets did not alter any variables during lactation. In conclusion, increasing the energy and protein density up to 1.6 Mcal of NEL/kg and 16% CP in diets during the last month before parturition improves nutrient balance of cattle prepartum and decreases hepatic lipid content at parturition.

Histological Responses of Four Leguminous Crops Infected with Meloidogyne incognita.

Histological responses to Meloidogyne incognita infection in Rhizobium nodules of clover, horsebean, lupine, and pea were investigated. The formation of giant cells in vascular bundles of nodules and roots, and the basal connection of the nodule, were usually associated with abnormal xylem and/or deformed xylem strands. However, giant cells did not disturb or prevent the development of nodular tissues. Areas in which galls formed, wall thickness of giant cells, and number of giant cells around the nematode head varied with plant species. Ranking by gall size and giant-cell wall thickness was horsebean > lupine and pea > clover. The multinucleate condition in giant cells resulted from repeated mitoses without subsequent cytokinesis. The resulting nuclei agglomerated in irregularly shaped masses in some giant cells.