Cone beam computed tomography-based evaluation of the relationship between the inferior alveolar canal and the cortical plates and the mandibular molar roots in the saudi subpopulation / Evaluación basada en tomografía computarizada de haz cónico de la relación entre el canal alveolar inferior y las placas corticales y las raíces de los molares mandibulares en la subpoblación saudita

Aim: To assess the distance between the inferior alveolar canal and the roots of the mandibular second molar and the mandibula and cortex in a Saudi Arabian subpopulation through existing CBCT images. Materials and Methods: This retrospective study was performed based on 120 patients CBCT images in five age groups.The distances (D1 and D2) between the buccal cortex (BC), lingual cortex (LC), and mandibular molars and the distances (D3) between the root apices and inferior alveolar nerve canal (IANC) were measured for each dental root on the right and left of the mandible with the help of Vision iCAT software. A radiology specialist with a gap of 15 days twice carried out the measurements. Statistical analysis was carried out with the help of SPSS 24. to analyse variability Chi-square analysis was done, and the p value was fixed at > 0.05. To check inter-person variability, Cohen's variability was fixed at 0.8. Results: The distance between the outer surface of the buccal cortical plate and the buccal root surface ranged between 3.8 and 5.7 mm, whereas the distance between the root apices of the mandibular molars and the IANC ranged between 4.8 and 3.5 mm. The distance from the outer surface of the lingual cortical plate to the lingual root surface varied between 1.2 and 2.8 mm. The mean distance between the root apices and IANC increased with age, more so in males than females. Conclusions: Even though this study was conducted on a small sample size, it will help the dental practitioners in planning endodontic procedures, surgical extractions, and implant placements, and it should be repeated with a higher number of images.

Objetivo: Evaluar la distancia entre el canal alveolar inferior y las raíces del segundo molar mandibular, y la mandíbula y la corteza en una subpoblación de Arabia Saudita a través de imágenes CBCT existentes.Materiales y Métodos: Este estudio retrospectivo se realizó con base en imágenes CBCT de 120 pacientes en cinco grupos de edad. Las distancias (D1 y D2) entre la corteza bucal (BC), la corteza lingual (LC) y los molares mandibulares y las distancias (D3) entre los Se midieron los ápices radiculares y el canal del nervio alveolar inferior (IANC) para cada raíz dental a la derecha e izquierda de la mandíbula con la ayuda del software Vision iCAT. Un especialista en radiología, con un intervalo de 15 días, realizó dos veces las mediciones. El análisis estadístico se realizó con la ayuda del SPSS 24. Para analizar la variabilidad se realizó un análisis de Chi-cuadrado y el valor p se fijó en > 0,05. Para comprobar la variabilidad entre personas, la variabilidad de Cohen se fijó en 0,8. Resultados: La distancia entre la superficie exterior de la placa cortical bucal y la superficie de la raíz bucal osciló entre 3,8 y 5,7 mm, mientras que la distancia entre los ápices radiculares de los molares mandibulares y el IANC osciló entre 4,8 y 3,5 mm. La distancia desde la superficie exterior de la placa cortical lingual hasta la superficie de la raíz lingual varió entre 1,2 y 2,8 mm. La distancia media entre los ápices de las raíces y la IANC aumentó con la edad, más en hombres que en mujeres. Conclusión: Aunque este estudio se realizó con un tamaño de muestra pequeño, ayudará a los odontólogos a planificar procedimientos de endodoncia, extracciones quirúrgicas y colocación de implantes, y debe realizarse con más números.

The in vitro cytotoxicity against human melanoma cells, tyrosinase inhibition and antioxidant activity of Grewia tenax leaves extracts / La citotoxicidad in vitro contra las células de melanoma humano, inhibición de la tirosinasa y actividad antioxidante de los extractos de hojas de Grewia tenax

Grewia tenax (Forssk.) Fiori (Malvaceae) grows in the Arabian Peninsula and is used for several medicinal purposes. To characterize the dermatological bioactivities of G. tenax in terms of its antimelanoma, antityrosinase and antioxidant activities. Cytotoxicity was assessed by cell proliferation and mitochondrial viability assays. Ability to inhibit mushroom tyrosinase and scavenge free radicals were evaluated by an enzymatic and DPPH scavenging microtiter assay, respectively. Phytochemical analyses were carried out using TLC, HPLC-UV and NMR. The chloroform extract shown significant cytotoxic activity in terms of mitochondrial viability (43 ± 14 µg/mL). We identified lupeol and b-sitosterol as the main active components for the tyrosinase inhibitory activity of the hexane extract. Scavenging activity of the DPPH· radical was confined to the water extract. Extracts from this plant have the potential to be used as a base in the development of cosmeceutical products intended to whiten skin or to combat radical-induced physiopathological processes.

Grewia tenax (Forssk.) Fiori (Malvaceae) crece en la Península Arábiga y se utiliza con varios fines medicinales. Para caracterizar las bioactividades dermatológicas de G. tenax en cuanto a sus actividades antimelanoma, antitirosinasa y antioxidante; la citotoxicidad se evaluó mediante ensayos de proliferación celular y viabilidad mitocondrial. La capacidad para inhibir la tirosinasa de hongo y eliminar los radicales libres se evaluó mediante un ensayo de microtitulación enzimático y de eliminación de DPPH, respectivamente. Los análisis fitoquímicos se realizaron mediante TLC, HPLC-UV y NMR. El extracto de cloroformo mostró una actividad citotóxica significativa en términos de viabilidad mitocondrial (43 ± 14 µg/mL). Identificamos lupeol y b-sitosterol como los principales componentes activos para la actividad inhibitoria de tirosinasa del extracto de hexano. La actividad depuradora del radical DPPH· se limitó al extracto acuoso. Los extractos de esta planta tienen potencial para ser utilizados como base en el desarrollo de productos cosmecéuticos destinados a blanquear la piel o combatir procesos fisiopatológicos inducidos por radicales.

Breeding ecology of the laughing dove (Streptopelia senegalensis) in the Taif City, Kingdom of Saudi Arabia / Ecologia reprodutiva da rola-do-senegal (Streptopelia senegalensis) na cidade de Taif, Reino da Arábia Saudita

The Laughing Dove (Streptopelia senegalensis) is a columbid bird commonly found throughout most of Africa, the Middle East, Central Asia, India and Australia. Its preferred habitat includes scrubland, agricultural lands, and human settlements. Despite this species' extensive breeding range, very little information is available regarding its breeding ecology. The main objective of this study was to investigate the breeding features of the Laughing Dove in Taif City, Saudi Arabia between March and May 2018 and December 2018 and May 2019. The results indicate that this species constructs its nests at a mean height of 2.74 ± 0.1 m from the ground. The average number of nesting materials used for building a Laughing Dove nest was 109.3 ± 11.25. This study recorded that this species starts breeding in the middle of February. A clutch of two eggs comprised 72% of all the nests, with a mean of 1.75 ± 0.06 eggs per clutch. The average egg size was 25.27 ± 0.43 mm x 20.25 ± 0.19 mm, with an average egg volume of 5.01 ± 0.13 cm3. In total, 39.5% of the eggs hatched, and 64.7% of hatchlings reached the fledgling stage, resulting in an overall breeding success of 25.6%. This study suggested that nest desertion and predation were the major factors contributing to nest failure.

A rola-do-senegal (Streptopelia senegalensis) é uma ave columbídea comumente encontrada na maior parte da África, Oriente Médio, Ásia Central, Índia e Austrália. Seu hábitat preferido inclui cerrado, terras agrícolas e assentamentos humanos. Apesar da extensa gama de reprodução desta espécie, muito pouca informação está disponível sobre sua ecologia reprodutiva. O principal objetivo deste estudo foi investigar as características reprodutivas da rola-do-senegal na cidade de Taif, Arábia Saudita entre março e maio de 2018 e dezembro de 2018 e maio de 2019. Os resultados indicam que esta espécie constrói seus ninhos a uma altura média de 2,74 ± 0,1 m do chão. O número médio de materiais de nidificação usados para a construção de um ninho de rola-do-senegal foi de 109,3 ± 11,25. Este estudo registrou que esta espécie começa a se reproduzir em meados de fevereiro. Uma ninhada de dois ovos compôs 72% de todos os ninhos, com média de 1,75 ± 0,06 ovo por ninhada. O tamanho médio dos ovos foi de 25,27 ± 0,43 mm x 20,25 ± 0,19 mm, com volume médio de ovos de 5,01 ± 0,13 cm3. No total, 39,5% dos ovos eclodiram e 64,7% dos filhotes atingiram a fase de filhote, resultando em um sucesso reprodutivo geral de 25,6%. Este estudo sugeriu que a deserção do ninho e a predação foram os principais fatores que contribuíram para o fracasso do ninho.

Faculty attitudes toward teaching students with mild intellectual disabilities in higher education / Atitudes do corpo docente em relação ao ensino de alunos com deficiência intelectual leve no ensino superior

ABSTRACT The purpose of this study was to examine the relations between faculty members' attitudes in Higher Education Saudi universities and demographic factors (i.e., academic rank, gender, years of experience, and type of college) by using the Interaction with Disabled Persons (IDP) Scale and multiple regression analysis. Results indicate that gender was associated with one dimension: vulnerability. The ranks of assistant professor and full professor were related to two dimensions: discomfort in social interactions and a coping-succumbing framework. Also, the college education variable was related to three dimensions: discomfort in social interactions, perceived level of information, and vulnerability. Results show that faculty members had lower negative attitudes toward students with mild intellectual disabilities in Higher Education. Based on study results, the researcher recommends more faculty training in how to support the Higher Education of students with disabilities as well as accessible support centers for individuals with disabilities to help staff as well as students. Also, universities should be made accessible to people with all types of disabilities who have a right to Higher Education.

RESUMO O objetivo deste estudo foi examinar as relações entre as atitudes dos membros do corpo docente no Ensino Superior de universidades sauditas e os fatores demográficos (ou seja, classificação acadêmica, gênero, anos de experiência e tipo de faculdade) usando a Escala de Interação com Pessoas com Deficiência (IPD) e a análise de regressão múltipla. Os resultados indicam que o gênero estava associado a uma dimensão: vulnerabilidade. As posições de professor assistente e professor titular estavam relacionadas a duas dimensões: desconforto nas interações sociais e uma estrutura de enfrentar-sucumbir. Além disso, a variável educação universitária estava relacionada a três dimensões: desconforto nas interações sociais, nível percebido de informação e vulnerabilidade. Os resultados mostram que os membros do corpo docente tiveram atitudes negativas mais baixas em relação aos estudantes com deficiências intelectuais leves no Ensino Superior. Com base nos resultados do estudo, o pesquisador recomenda mais treinamento do corpo docente sobre como apoiar os estudantes com deficiência no Ensino Superior bem como centros de suporte acessíveis para indivíduos com deficiência para ajudar a equipe e os alunos. Ademais, as universidades devem ser acessíveis a pessoas com todos os tipos de deficiência que têm direito ao Ensino Superior.

Frequency of Rh and K antigens in blood donors in Riyadh

ABSTRACT Objectives: Investigate the prevalence of Rh and the K antigens and their phenotypes in the red blood cells of blood donors in Riyadh, Saudi Arabia. Methods: This is a retrospective study. The five principal Rh antigens (D, C, c, E, e) and the Kell antigen from the Kell blood group were tested in 4,675 random samples collected from four blood bank centers in Riyadh. Data were collected for seven weeks (from January 4, 2019 to February 28, 2019). Antigens were tested using the TANGO Optimo system. Results: We found that approximately 86% of the donors had the D antigen, 66% had C, 78% had c, 26% had E, 97% had e and 14% had K. The most common Rh phenotypes were R1r (31%) and R1R1 (22%). Conclusion: The differences in the results between the study population and other populations, such as Caucasian, Indian and African populations indicate the importance of establishing a population-specific database.

Frequency of Rh and K antigens in blood donors in Riyadh.

OBJECTIVES: Investigate the prevalence of Rh and the K antigens and their phenotypes in the red blood cells of blood donors in Riyadh, Saudi Arabia. METHODS: This is a retrospective study. The five principal Rh antigens (D, C, c, E, e) and the Kell antigen from the Kell blood group were tested in 4,675 random samples collected from four blood bank centers in Riyadh. Data were collected for seven weeks (from January 4, 2019 to February 28, 2019). Antigens were tested using the TANGO Optimo system. RESULTS: We found that approximately 86% of the donors had the D antigen, 66% had C, 78% had c, 26% had E, 97% had e and 14% had K. The most common Rh phenotypes were R1r (31%) and R1R1 (22%). CONCLUSION: The differences in the results between the study population and other populations, such as Caucasian, Indian and African populations indicate the importance of establishing a population-specific database.

Changes in the feeding behavior and habitat use of the desert hedgehog Paraechinus aethiopicus (Ehrenberg 1832, Eulipotyphla: Erinaceidae), in Saudi Arabia / Mudanças no comportamento alimentar e no uso do hábitat do ouriço-do-deserto Paraechinus aethiopicus (Ehrenberg 1832, Eulipotyphla: Erinaceidae), na Arábia Saudita

Due to the urbanization and human invasion of the natural environments, great changes have been occurred on the food composition and feeding ecology of several animals especially those are sharing human his habitat in fields, wadis and gardens. The desert hedgehogs Paraechinus aethiopicus populations inhabiting different localities in Saudi Arabia were studied by using stomach contents analysis between February 2015 and October 2019. Precise analysis of stomach contents of 55 hedgehogs showed that the food of P. aethiopicus is highly diverse and highly influenced with effect of human on the environment including cooked rice, insects, plant materials, eggshells, worms, garbage and remnants of mammals and birds. Diet composition showed seasonal variations that are apparently associated with changes in the availability of different food items. The present results clearly showed that P. aethiopicus is an omnivorous mammal, capable of adapting to a great variety of dietary compositions in the study sites.(AU)

Devido à urbanização e invasão humana dos ambientes naturais, grandes mudanças têm ocorrido na composição alimentar e ecologia alimentar de vários animais, especialmente aqueles que estão compartilhando seu hábitat humano em campos, wadis e jardins. As populações de ouriços-do-deserto Paraechinus aethiopicus que habitam diferentes localidades na Arábia Saudita foram estudadas usando análise de conteúdo estomacal entre fevereiro de 2015 e outubro de 2019. A análise precisa do conteúdo estomacal de 55 ouriços mostrou que a alimentação de P. aethiopicus é altamente diversa e altamente influenciada com efeito de humanos no meio ambiente, incluindo arroz cozido, insetos, materiais vegetais, cascas de ovo, vermes, lixo e restos de mamíferos e pássaros. A composição da dieta apresentou variações sazonais que aparentemente estão associadas a mudanças na disponibilidade de diferentes itens alimentares. Os presentes resultados mostraram claramente que P. aethiopicus é um mamífero onívoro, capaz de se adaptar a uma grande variedade de composições dietéticas nos locais de estudo.(AU)

Plant diversity in Sabkha ecosystems of arid region: spatial and environmental drivers / Diversidade de plantas em ecossistemas Sabkha da região árida: drivers espaciais e ambientais

This study investigated the effects of spatial and environmental factors and their interactions on plant species composition in salt marsh (Sabkha) ecosystem located in arid region (Saudi Arabia). The plant species and environmental variables were investigated in 38 sites located in three regions. A total of 15 environmental variables were measured in each site and the geographical coordinates were used to extract spatial variables (using PCNM). A total of 81plant species were reported from 38 sites. The three regions showed patterns of homogeneity of multivariate dispersions (i.e. beta diversity). The PCNM analysis extracted 18 PCNM vectors and only 3 vectors were retained after forward selection. The spatial variables (selected PCNM vectors) explained only 3.21% of the variation in species composition of plants (using variation partitioning technique). However, eight environmental variables were selected after forward selection (Lead, Copper, total organic matter, Potassium, Magnesium, pH, Zinc and Iron, F= 4.72, P<0.05) and explained 19.61% of the total variation in the species composition. In conclusion, the plant communities in Sabkhas were not spatially structured due to the low percentage of variation explained by the spatial variables (PCNM vectors). The environmental variables were corresponded to the high fraction of variation explained. On the other hand, Sabkhas in Saudi Arabia are considered a hot spot for diversity not only for plants but for other animals (birds, vertebrates and invertebrates). Therefore, immediate conservation plans should be implemented to reduce the adverse effect of urbanization, industrialization as well as other anthropogenic activities.

Este estudo investigou os efeitos de fatores espaciais e ambientais e suas interações na composição de espécies vegetais no ecossistema de sapal (Sabkha) localizado na região árida (Arábia Saudita). As espécies vegetais e variáveis ​​ambientais foram investigadas em 38 locais localizados em três regiões. Um total de 15 variáveis ​​ambientais foi medido em cada local, e as coordenadas geográficas foram usadas para extrair as variáveis ​​espaciais (usando PCNM). Um total de 81 espécies de plantas foi relatado em 38 locais. As três regiões mostraram padrões de homogeneidade de dispersões multivariadas (ou seja, diversidade beta). A análise PCNM extraiu 18 vetores PCNM e apenas 3 vetores foram retidos após a seleção direta. As variáveis ​​espaciais (vetores PCNM selecionados) explicaram apenas 3,21% da variação na composição de espécies das plantas (utilizando a técnica de partição de variação). No entanto, 8 variáveis ​​ambientais foram selecionadas após seleção direta (chumbo, cobre, matéria orgânica total, potássio, magnésio, pH, zinco e ferro, F = 4,72, P < 0,05) e explicaram 19,61% da variação total na composição de espécies. Em conclusão, as comunidades vegetais em Sabkhas não foram espacialmente estruturadas devido à baixa porcentagem de variação explicada pelas variáveis ​​espaciais (vetores PCNM). As variáveis ​​ambientais corresponderam à alta fração de variação explicada. Por outro lado, os Sabkhas na Arábia Saudita são considerados um hot spot de diversidade não apenas para plantas, mas para outros animais (aves, vertebrados e invertebrados). Portanto, planos de conservação imediatos devem ser implementados para reduzir os efeitos adversos da urbanização, industrialização e outras atividades antrópicas.

Changes in the feeding behavior and habitat use of the desert hedgehog Paraechinus aethiopicus (Ehrenberg 1832, Eulipotyphla: Erinaceidae), in Saudi Arabia / Mudanças no comportamento alimentar e no uso do hábitat do ouriço-do-deserto Paraechinus aethiopicus (Ehrenberg 1832, Eulipotyphla: Erinaceidae), na Arábia Saudita

Due to the urbanization and human invasion of the natural environments, great changes have been occurred on the food composition and feeding ecology of several animals especially those are sharing human his habitat in fields, wadis and gardens. The desert hedgehogs Paraechinus aethiopicus populations inhabiting different localities in Saudi Arabia were studied by using stomach contents analysis between February 2015 and October 2019. Precise analysis of stomach contents of 55 hedgehogs showed that the food of P. aethiopicus is highly diverse and highly influenced with effect of human on the environment including cooked rice, insects, plant materials, eggshells, worms, garbage and remnants of mammals and birds. Diet composition showed seasonal variations that are apparently associated with changes in the availability of different food items. The present results clearly showed that P. aethiopicus is an omnivorous mammal, capable of adapting to a great variety of dietary compositions in the study sites.

Devido à urbanização e invasão humana dos ambientes naturais, grandes mudanças têm ocorrido na composição alimentar e ecologia alimentar de vários animais, especialmente aqueles que estão compartilhando seu hábitat humano em campos, wadis e jardins. As populações de ouriços-do-deserto Paraechinus aethiopicus que habitam diferentes localidades na Arábia Saudita foram estudadas usando análise de conteúdo estomacal entre fevereiro de 2015 e outubro de 2019. A análise precisa do conteúdo estomacal de 55 ouriços mostrou que a alimentação de P. aethiopicus é altamente diversa e altamente influenciada com efeito de humanos no meio ambiente, incluindo arroz cozido, insetos, materiais vegetais, cascas de ovo, vermes, lixo e restos de mamíferos e pássaros. A composição da dieta apresentou variações sazonais que aparentemente estão associadas a mudanças na disponibilidade de diferentes itens alimentares. Os presentes resultados mostraram claramente que P. aethiopicus é um mamífero onívoro, capaz de se adaptar a uma grande variedade de composições dietéticas nos locais de estudo.

Changes in the feeding behavior and habitat use of the desert hedgehog Paraechinus aethiopicus (Ehrenberg 1832, Eulipotyphla: Erinaceidae), in Saudi Arabia

Abstract Due to the urbanization and human invasion of the natural environments, great changes have been occurred on the food composition and feeding ecology of several animals especially those are sharing human his habitat in fields, wadis and gardens. The desert hedgehogs Paraechinus aethiopicus populations inhabiting different localities in Saudi Arabia were studied by using stomach contents analysis between February 2015 and October 2019. Precise analysis of stomach contents of 55 hedgehogs showed that the food of P. aethiopicus is highly diverse and highly influenced with effect of human on the environment including cooked rice, insects, plant materials, eggshells, worms, garbage and remnants of mammals and birds. Diet composition showed seasonal variations that are apparently associated with changes in the availability of different food items. The present results clearly showed that P. aethiopicus is an omnivorous mammal, capable of adapting to a great variety of dietary compositions in the study sites.

Resumo Devido à urbanização e invasão humana dos ambientes naturais, grandes mudanças têm ocorrido na composição alimentar e ecologia alimentar de vários animais, especialmente aqueles que estão compartilhando seu hábitat humano em campos, wadis e jardins. As populações de ouriços-do-deserto Paraechinus aethiopicus que habitam diferentes localidades na Arábia Saudita foram estudadas usando análise de conteúdo estomacal entre fevereiro de 2015 e outubro de 2019. A análise precisa do conteúdo estomacal de 55 ouriços mostrou que a alimentação de P. aethiopicus é altamente diversa e altamente influenciada com efeito de humanos no meio ambiente, incluindo arroz cozido, insetos, materiais vegetais, cascas de ovo, vermes, lixo e restos de mamíferos e pássaros. A composição da dieta apresentou variações sazonais que aparentemente estão associadas a mudanças na disponibilidade de diferentes itens alimentares. Os presentes resultados mostraram claramente que P. aethiopicus é um mamífero onívoro, capaz de se adaptar a uma grande variedade de composições dietéticas nos locais de estudo.

Preliminary assessment of weed population in vegetable and fruit farms of Taif, Saudi Arabia

Abstract A significant level of yield losses in the vegetable and fruit farms are attributed to the weed populations of the area. This study was conducted for eighteen months during 2019-2020 to assess the presence of various weed families, related species, and their densities in the vegetable (CROP A) and fruit (CROP B) farms of Taif, Saudi Arabia. During the study, fourteen and ten weed families were noted in the vegetable and fruit farms of the studied area, respectively. Poaceae family weeds (729) were significantly higher in numbers followed by the families Asteraceae (414), Chenopodiaceae (338), and Gisekiaceae (153). In the vegetable farms, two weed species of the family Poaceae including Setaria viridis (437) and Eleusine indica ssp (277) were present in the higher numbers followed by Chenopodium murale (166) of the Chenopodiaceae family. In the fruit farms, the weed species Cynodon dactylon of the family Poaceae represented the highest weed density (172) followed by Gisekia pharnaceoides L. species (153) of family Gisekiaceae and Portulaca oleracea (59) belonging to the family Portulacaceae. The vegetable and fruit farms of the Taif region face severe weed pressure that affects the cultivated crops. This study depicts a comprehensive picture of weed diversity and density in the vegetable and fruit farms of the area. The results of this study will be beneficial in developing effective weed management practices for better crop production.

Resumo Um nível significativo de perdas de rendimento nas fazendas de hortaliças e frutas é atribuído às populações de ervas daninhas da área. Este estudo foi conduzido por dezoito meses durante 2019-2020 para avaliar a presença de várias famílias de ervas daninhas, espécies relacionadas e suas densidades nas fazendas de vegetais (CROP A) e frutas (CROP B) de Taif, Arábia Saudita. Durante o estudo, catorze e dez famílias de plantas daninhas foram observadas nas fazendas de hortaliças e frutas da área estudada, respectivamente. As plantas daninhas da família Poaceae (729) foram significativamente maiores em número, seguidas pelas famílias Asteraceae (414), Chenopodiaceae (338) e Gisekiaceae (153). Nas hortas, duas espécies de plantas daninhas da família Poaceae, incluindo Setaria viridis (437) e Eleusine indica ssp (277), estavam presentes em maior número, seguidas por Chenopodium murale (166) da família Chenopodiaceae. Nas fruticulturas, a espécie de plantas daninhas Cynodon dactylon da família Poaceae representou a maior densidade de plantas daninhas (172) seguida das espécies Gisekia pharnaceoides L. (153) da família Gisekiaceae e Portulaca oleracea (59) pertencentes à família Portulacaceae. As fazendas de hortaliças e frutas da região de Taif enfrentam uma forte pressão de ervas daninhas que afeta as culturas cultivadas. Este estudo apresenta um quadro abrangente da diversidade e densidade de plantas daninhas nas fazendas de hortaliças e frutas da região. Os resultados deste estudo serão benéficos no desenvolvimento de práticas eficazes de manejo de plantas daninhas para uma melhor produção das culturas.

Incidence of Medication Errors in King Fahad Hospital Madina Saudi Arabia

Abstract This study aimed to evaluate the incidence of medication errors over a period of one year in King Fahad Hospital Madina Saudi Arabia. This retrospective, cross-sectional study was conducted over a period of one year from 2018 January to 2018 December using patient's records. King Fahad Hospital in Madina was selected for the study center. Data collected include the number and types of errors, severity, location of errors, errors by profession, and errors occurred in the medical wards. Statistical analysis was carried out using statistical package for social science version22. A total of twenty- six hundred and fifty-eight medication errors were reported during the study period. Among the reports 2567(96.5%) of the errors were due to near misses, followed by transcribing errors 1597(60%), ordering errors 928(34.9%), duplicative therapy 765(28.7%), wrong dose 454(%). The most common procedures involve medication errors were wrong documentation 442(16.6%), duration 168(6.3%) wrong quantity 162(6.4%). Majority of the medication errors were contributed by physicians (99.2%) and 0.7% of them were due to the pharmacist. In conclusion study findings reported that yet some kind of medication errors has been under reported and it was common in most hospital, further studies with intervention programs needed to control the incidence of medication errors in a Saudi hospital

Evaluation of drug utilisation pattern and cost associated with diabetes mellitusType 2 management in Saudi Arabia

Abstract Diabetic mellitus is an emerging disease in Saudi Arabia. In this regard, a cross-sectional retrospective study was conducted to evaluate drug utilization pattern and the cost associated with non-insulin-dependent diabetes mellitus disease management in Saudi Arabia. Data retrieved from the electronic pharmacy records during the last one year were employed in this study. World Health Organization (WHO) Defined Daily Dose (DDD) method was employed to compute the daily price of each oral hypoglycaemic agent. The American Diabetes Association (ADA) guidelines and protocols were used to evaluate the level of adherence. A total of 17057 patients were enrolled in the study. Out of the 17057 patients enrolled in the study, 60.06 % (10246) were males and the rest females. In monotherapy, biguanides (metformin) were the most recommended and utilised drugs among 5673 patients (33.25%). The most commonly used drug combination was found to be sitagliptin+metformin (1754 units). The cost per unit dose was highest for liraglutide (A10BJ02) 258.32SR (68.79USD), and lowest for metformin (A10BA02) 0.49SR (0.13 USD). Metformin was the choice drug for the diabetes patients; biguanides (metformin) and DPP-4 (sitagliptins) were the most familiar established dose combination employed. Generic drugs should be used in order to reduce overall cost.

Preliminary assessment of weed population in vegetable and fruit farms of Taif, Saudi Arabia / Avaliação preliminar da população de plantas daninhas em fazendas de hortaliças e frutas de Taif, Arábia Saudita

A significant level of yield losses in the vegetable and fruit farms are attributed to the weed populations of the area. This study was conducted for eighteen months during 2019-2020 to assess the presence of various weed families, related species, and their densities in the vegetable (CROP A) and fruit (CROP B) farms of Taif, Saudi Arabia. During the study, fourteen and ten weed families were noted in the vegetable and fruit farms of the studied area, respectively. Poaceae family weeds (729) were significantly higher in numbers followed by the families Asteraceae (414), Chenopodiaceae (338), and Gisekiaceae (153). In the vegetable farms, two weed species of the family Poaceae including Setaria viridis (437) and Eleusine indica ssp (277) were present in the higher numbers followed by Chenopodium murale (166) of the Chenopodiaceae family. In the fruit farms, the weed species Cynodon dactylon of the family Poaceae represented the highest weed density (172) followed by Gisekia pharnaceoides L. species (153) of family Gisekiaceae and Portulaca oleracea (59) belonging to the family Portulacaceae. The vegetable and fruit farms of the Taif region face severe weed pressure that affects the cultivated crops. This study depicts a comprehensive picture of weed diversity and density in the vegetable and fruit farms of the area. The results of this study will be beneficial in developing effective weed management practices for better crop production.

Um nível significativo de perdas de rendimento nas fazendas de hortaliças e frutas é atribuído às populações de ervas daninhas da área. Este estudo foi conduzido por dezoito meses durante 2019-2020 para avaliar a presença de várias famílias de ervas daninhas, espécies relacionadas e suas densidades nas fazendas de vegetais (CROP A) e frutas (CROP B) de Taif, Arábia Saudita. Durante o estudo, catorze e dez famílias de plantas daninhas foram observadas nas fazendas de hortaliças e frutas da área estudada, respectivamente. As plantas daninhas da família Poaceae (729) foram significativamente maiores em número, seguidas pelas famílias Asteraceae (414), Chenopodiaceae (338) e Gisekiaceae (153). Nas hortas, duas espécies de plantas daninhas da família Poaceae, incluindo Setaria viridis (437) e Eleusine indica ssp (277), estavam presentes em maior número, seguidas por Chenopodium murale (166) da família Chenopodiaceae. Nas fruticulturas, a espécie de plantas daninhas Cynodon dactylon da família Poaceae representou a maior densidade de plantas daninhas (172) seguida das espécies Gisekia pharnaceoides L. (153) da família Gisekiaceae e Portulaca oleracea (59) pertencentes à família Portulacaceae. As fazendas de hortaliças e frutas da região de Taif enfrentam uma forte pressão de ervas daninhas que afeta as culturas cultivadas. Este estudo apresenta um quadro abrangente da diversidade e densidade de plantas daninhas nas fazendas de hortaliças e frutas da região. Os resultados deste estudo serão benéficos no desenvolvimento de práticas eficazes de manejo de plantas daninhas para uma melhor produção das culturas.

Perceptions and Attitudes of Hospital' Prescribers towards Drug Information Sources and Prescribing Practices

Abstract Healthcare professionals use a variety of drug information sources to fulfill their clinical needs and medical practice. The aim of present study was to assess the sources of drug information among hospital' prescribers and evaluate their prescribing behavior in Saudi hospitals. A cross-sectional survey was conducted among randomly selected hospital' prescribers using a self-administered questionnaire. The response rate to the survey was 64.29%, with a ratio of 76.44% male and 23.56% female. The internet 137(60.89%) and textbooks 86(38.22%) were the prevalent sources for drug information used. Up-To-Date 107(47.56%), Medscape 105(46.67%) and FDA 74(32.88%) were the common electronic drug sources used. About 151(67.11%) of hospital' prescribers considered the pharmacist as a reliable drug information source. The most favored drug requests by hospital' prescribers from the pharmacists were drug alternatives 110(48.89%) followed by drug interactions 94(41.78%), side effects 78(34.67%) and indications 60(26.67%). Therapeutic efficacy 168(74.67%) and drug availability 73(32.44%) were the main factors contributed to the selection of drugs. This study shows some differences in hospital prescribers' perceptions of sources of drug information depending upon their background and clinical practice. Therefore, knowing appropriate drug information used by hospital' prescribers is fundamental for drug efficacy and safety in clinical practice.

Changes in the feeding behavior and habitat use of the desert hedgehog Paraechinus aethiopicus (Ehrenberg 1832, Eulipotyphla: Erinaceidae), in Saudi Arabia / Mudanças no comportamento alimentar e no uso do hábitat do ouriço-do-deserto Paraechinus aethiopicus (Ehrenberg 1832, Eulipotyphla: Erinaceidae), na Arábia Saudita

Due to the urbanization and human invasion of the natural environments, great changes have been occurred on the food composition and feeding ecology of several animals especially those are sharing human his habitat in fields, wadis and gardens. The desert hedgehogs Paraechinus aethiopicus populations inhabiting different localities in Saudi Arabia were studied by using stomach contents analysis between February 2015 and October 2019. Precise analysis of stomach contents of 55 hedgehogs showed that the food of P. aethiopicus is highly diverse and highly influenced with effect of human on the environment including cooked rice, insects, plant materials, eggshells, worms, garbage and remnants of mammals and birds. Diet composition showed seasonal variations that are apparently associated with changes in the availability of different food items. The present results clearly showed that P. aethiopicus is an omnivorous mammal, capable of adapting to a great variety of dietary compositions in the study sites.

Devido à urbanização e invasão humana dos ambientes naturais, grandes mudanças têm ocorrido na composição alimentar e ecologia alimentar de vários animais, especialmente aqueles que estão compartilhando seu hábitat humano em campos, wadis e jardins. As populações de ouriços-do-deserto Paraechinus aethiopicus que habitam diferentes localidades na Arábia Saudita foram estudadas usando análise de conteúdo estomacal entre fevereiro de 2015 e outubro de 2019. A análise precisa do conteúdo estomacal de 55 ouriços mostrou que a alimentação de P. aethiopicus é altamente diversa e altamente influenciada com efeito de humanos no meio ambiente, incluindo arroz cozido, insetos, materiais vegetais, cascas de ovo, vermes, lixo e restos de mamíferos e pássaros. A composição da dieta apresentou variações sazonais que aparentemente estão associadas a mudanças na disponibilidade de diferentes itens alimentares. Os presentes resultados mostraram claramente que P. aethiopicus é um mamífero onívoro, capaz de se adaptar a uma grande variedade de composições dietéticas nos locais de estudo.

Causes, timing, and modes of death in a tertiary pediatric intensive care unit: Five years' experience.

OBJECTIVES: To identify the causes, modes, and timing of death in a tertiary pediatric intensive care unit (PICU). METHODS: This is a retrospective data analysis of patients older than 48 hours and younger than 15 years who died in the PICU over a 5-year period from January 2012 until December 2016 at a tertiary hospital in Riyadh, Saudi Arabia. RESULTS: There were 101 deaths out of 2295 admissions, representing average crude mortality rate of 4.4%. Sepsis was the most common cause of death in 31 patients (30.7%), followed by lower respiratory tract infections in 19 (18.8%), and cardiac diseases in 12 (11.9%). Failed cardiopulmonary resuscitation was the most common mode of death in 51 patients (50.5%), followed by withholding life-sustaining treatment in 43 (42.6%), and brain death in 7 (6.9%). Although more deaths occurred during after hours (n=70; 69.3%), there was no significant correlation between mode of death and working hours vs. after hours (p>0.05). Among the cohort, 63 patients (62.4%) had an infection-attributed mortality, of which 43 (68.3%) were bacterial, 14 (22.2%) were viral, and 10 (15.9%) were fungal. CONCLUSION: Infections remain a significant cause of death in the PICU. Further improvement of prevention programs and early therapy of severe infections could lower pediatric mortality. This report highlights the need for enhancing palliative care programs. The low rate of brain death diagnoses warrants further investigation.

Prevalence and quality of informed consent for patients undergoing cosmetic procedures: a cross sectional study / Prevalencia y calidad del consentimiento informado de los pacientes sometidos a procedimientos estéticos: un estudio transversa / Prevalência e qualidade de consentimento informado para pacientes submetendo-se a procedimentos cosméticos: um estudo transversal

Abstract: Background: Failure of the physician to disclose potential risks and benefits associated with cosmetic procedures is one of the main causes of legal disputes over informed consent. The objective was to assess the prevalence and quality of the informed consent given by patients who undergone cosmetic procedures and its association with post-procedure adverse events. Methods: It was a cross-sectional, online, questionnaire-based study conducted during September and October 2020. Eligible adult male and female patients who were attending a governmental dermatology clinic at Al-Kharj city (Saudi Arabia) were invited to join the study. Results: A total of 246 patients were included in the study. Out of 246, 111 (45.1%) patients performed at least one cosmetic procedure before, and 89 (80.2%) of them signed an informed consent. 62 (69.7%) of them signed a consent before the procedure, 17 (19.1%) reported post-procedure adverse events, 16 (18.0%) reported dissatisfactions, and 27 (30.3%) reported either. None of the consent characteristics were significantly associated with higher prevalence of post-procedure adverse events or non-satisfactions. Conclusions: The prevalence and the quality of informed consent before cosmetic procedures are inadequate. Urgent corrections are required to protect the patient's rights and to legally protect the treating physician.

Resumen: Antecedentes: El hecho de que el médico no revele los posibles riesgos y beneficios asociados a los procedimientos estéticos es una de las principales causas de las disputas legales sobre el consentimiento informado. El objetivo fue evaluar la prevalencia y la calidad del consentimiento informado dado por los pacientes sometidos a procedimientos estéticos y su asociación con los eventos adversos posteriores al procedimiento. Métodos: Fue un estudio transversal, online, basado en un cuestionario, realizado durante septiembre y octubre de 2020. Se invitó a participar en el estudio a pacientes adultos de ambos sexos que acudían a una clínica dermatológica gubernamental en la ciudad de Al-Kharj (Arabia Saudí). Resultados: Un total de 246 pacientes fueron incluidos en el estudio. De los 246, 111 (45,1%) pacientes se habían sometido al menos a un procedimiento cosmético antes, y 89 (80,2%) de ellos firmaron un consentimiento informado. 62 (69,7%) de ellos firmaron un consentimiento antes del procedimiento, 17 (19,1%) informaron de acontecimientos adversos posteriores al procedimiento, 16 (18,0%) informaron de insatisfacciones y 27 (30,3%) informaron de cualquiera de los dos. Ninguna de las características del consentimiento se asoció significativamente con una mayor prevalencia de acontecimientos adversos posteriores al procedimiento o insatisfacciones. Conclusiones: La prevalencia y la calidad del consentimiento informado antes de los procedimientos cosméticos son inadecuadas. Se requieren correcciones urgentes para proteger los derechos del paciente y proteger legalmente al médico tratante.

Resumo: Contexto: A falha do médico em comunicar os potenciais riscos e benefícios associados a procedimentos cosméticos é uma das principais causas de disputas legais sobre consentimento informado. O objetivo foi avaliar a prevalência e qualidade do consentimento informado dado a pacientes que sofreram procedimentos cosméticos e sua associação com eventos adversos pós-procedimento. Métodos: Estudo transversal, online, baseado em questionário, realizado durante setembro e outubro de 2020. Pacientes homens e mulheres, adultos elegíveis, de uma clínica dermatológica governamental da cidade de Al-Kharj (Arábia Saudita) foram convidados a participar do estudo. Resultados: Um total de 246 pacientes foram incluídos no estudo. Dos 246, 111 (45.1%) pacientes realizaram pelo menos um procedimento cosmético anterior e 89 (80.2%) deles assinaram um consentimento informado. 62 (69.7%) deles assinaram um consentimento antes do procedimento, 17 (19.1%) relataram eventos adversos pós-procedimento, 16 (18.0%) relataram insatisfações e 27 (30.3%) relataram ambos. Nenhuma das características do consentimento foram significativamente associadas com mais alta prevalência de eventos adversos pós-procedimento ou não satisfação. Conclusões: A prevalência e a qualidade do consentimento informado antes de procedimentos cosméticos são inadequados. Correções urgentes são requeridas para proteger os direitos dos pacientes e para legalmente proteger o médico responsável.

Assessment of the mental foramen location in a sample of Saudi Al Hasa, population using cone-beam computed tomography technology: a retrospective study / Evaluación de la ubicación del foramen mental en una muestra de población de Arabia Al Hasa, utilizando tecnología de tomografía computarizada de haz cónico: un estudio retrospectivo

Background: It is essential that the dentist understand the positional variations of the mental foramen to perform different types of dental procedures. This study was conducted to identify the position of the mental foramen among the Saudi population of Al Hasa. Material and Methods: According to the selection criteria of 200 CBCT images, 101 images were selected. The selected images were categorized into five groups with respect to patient age. Each image was evaluated from both sides of the mandible and then recorded in six classes (position I-VI) according to the horizontal position and three classes in the vertical position. Results: In the Saudi Al Hasa population, Type 4 (at the level of 2ndpremolar) was the most common location for mental foramen in the horizontal direction, on the right side (n= 41; 40.6%) and on the left side (n=44; 43.6%). Mental foramen was found in the vertical location, Type 3 (below the apex of 1st and 2nd premolars) was found in the right side (n= 54; 53.5%) and left side (n=56; 55.4%). The position of mental foramen is not constant and changes according to gender and ethnicity. This warrants dentists to evaluate patients individually. Conclusion: Even though the present study was done with a small sample of patients it provides a picture about approximate location of mental foramen among the target group of a population.

Antecedentes: Es esencial que el dentista comprenda las variaciones posicionales del agujero mentoniano para realizar diferentes tipos de procedimientos dentales. Este estudio se realizó para identificar la posición del foramen mental entre la población saudita de Alhasa. Material y Métodos: De acuerdo con los criterios de selección de 200 imágenes CBCT, se seleccionaron 101 imágenes. Las imágenes seleccionadas se categorizaron en cinco grupos con respecto a la edad del paciente. Cada imagen se evaluó desde ambos lados de la mandíbula y luego se registró en seis clases (posición I-VI) según la posición horizontal y tres clases en la posición vertical. Resultados: En la población saudita de Al Hasa, el tipo 4 (al nivel del segundo premolar) fue la ubicación más común para el foramen mental en la dirección horizontal, en el lado derecho (n = 41; 40,6%) y en el lado izquierdo (n = 44; 43,6%). El foramen mental se encontró en la ubicación vertical, el Tipo 3 (debajo del ápice del 1er y 2do premolares) se encontró en el lado derecho (n = 54; 53,5%) y el lado izquierdo (n = 56; 55,4%). La posición del foramen mental no es constante y cambia según el género y la etnia. Esto justifica que los dentistas evalúen a los pacientes individualmente. Conclusión: Aunque el presente estudio se realizó con una pequeña muestra de pacientes, proporciona una imagen sobre la ubicación aproximada del foramen mental entre el grupo objetivo de una población.

Morphomolecular and pathological study of Scaphanocephalus sp. in new host Siganus argenteus in the Arabian Gulf.

In this study, Scaphanocephalus parasite (Platyhelminthes: Heterophyidae) metacercariae were found in Siganus argenteus (forktail rabbitfish or streamlined spinefoot) in the Arabian Gulf of Jubail province, Saudi Arabia. The findings may constitute new host and locality records for this parasite. Based on the number of black spots containing parasite cysts per fish, our study indicated that Siganus argenteus had high infection intensities of encysted metacercariae belonging to the genus Scaphanocephalus. Of the 3500 S. argenteus specimens examined, 800 (22.9%) showed multiple black cysts over the entire body surface, including the membranous parts of fins, while none were seen on the internal organs. The prevalence of infection was highest in summer (June-August) (8.8%). The excysted metacercariae differed morphologically from previously identified Scaphanocephalus spp. Molecular analysis of rDNA showed 100% identity with an unnamed Scaphanocephalus sp. reported in Caribbean fish. Therefore, our findings may indicate a new species of this previously rarely recorded fish parasite. The histopathological examination revealed that the encysted parasites were restricted to the dermal layer of the skin and surrounded by melanophores and a fibrous connective tissue capsule, with focal myositis and Zenker's necrosis in the underlying muscle tissue. The characteristically 'winged' parasite was clearly observed within the cysts. The high prevalence of Scaphanocephalus infection in siganid fish we detected requires further epidemiological study.