Nutritional Resources Research Articles

Understanding Food Security as a Social Determinant of Diabetes-Related Health during Pregnancy.

Gestational and pregestational diabetes during pregnancy are substantial and growing public health issues. Low-income individuals and individuals who identify as racial and ethnic minorities are disproportionately affected. Food security, which is defined as the degree to which individuals have capacity to access and obtain food, is at the center of nutritional resources and decisions for individuals with diabetes. While increasingly recognized as an important mediator of health disparities in the United States, food insecurity is understudied during pregnancy and specifically among pregnant individuals with diabetes, for whom the impact of food-related resources may be even greater. Previous research has suggested that food insecurity is associated with type 2 diabetes mellitus diagnoses and disease exacerbation in the general adult population. An emerging body of research has suggested that food insecurity during pregnancy is associated with gestational diabetes mellitus diagnoses and adverse diabetes-related outcomes. Additionally, food insecurity during pregnancy may be associated with adverse maternal and neonatal outcomes. Future research and clinical work should aim to further examine these relationships and subsequently develop evidence-based interventions to improve diabetes-related outcomes among pregnant individuals with food insecurity. The purpose of this article is to offer a working definition of food security, briefly review issues of food insecurity and diabetes, summarize research on food insecurity and diabetes-related pregnancy health, and discuss clinical recommendations and areas for future investigation. KEY POINTS: · Research on food insecurity and diabetes-related health is limited.. · The impact of food security on diabetes management and obstetric outcomes is likely significant.. · Future work to evaluate perinatal food security screening is warranted..

Posttranslational regulation of transporters important for symbiotic interactions.

Coordinated sharing of nutritional resources is a central feature of symbiotic interactions, and, despite the importance of this topic, many questions remain concerning the identification, activity, and regulation of transporter proteins involved. Recent progress in obtaining genome and transcriptome sequences for symbiotic organisms provides a wealth of information on plant, fungal, and bacterial transporters that can be applied to these questions. In this update, we focus on legume-rhizobia and mycorrhizal symbioses and how transporters at the symbiotic interfaces can be regulated at the protein level. We point out areas where more research is needed and ways that an understanding of transporter mechanism and energetics can focus hypotheses. Protein phosphorylation is a predominant mechanism of posttranslational regulation of transporters in general and at the symbiotic interface specifically. Other mechanisms of transporter regulation, such as protein-protein interaction, including transporter multimerization, polar localization, and regulation by pH and membrane potential are also important at the symbiotic interface. Most of the transporters that function in the symbiotic interface are members of transporter families; we bring in relevant information on posttranslational regulation within transporter families to help generate hypotheses for transporter regulation at the symbiotic interface.

Content identification for the development of a nutrition resource kit for malnourished and at-risk elderly: A review

Introduction: Elderly population is more likely to suffer from malnutrition, thereby requiring appropriate nutrition education as part of nutrition intervention to overcome this issue. This review aims to identify content suitable for developing a nutrition resource kit that provides nutritional guidance to combat malnutrition among malnourished and at-risk elderly in health clinics setting, particularly in Malaysia. Methods: A literature search was conducted up to 15th December 2019 in four databases: PubMed, Scopus, COCHRANE, and ProQuest Health & Medical Collection. Potential literature on nutrition education, suitable dietary guidelines and existing educational materials for elderly in the community, in English and Malay languages, were searched to identify suitable content for the nutrition resource kit. All relevant documents were included based on inclusion and exclusion criteria. Data were extracted and analysed according to the PRISMA-ScR guidelines. Results: A total of 27 documents consisting of articles, printed materials and guidelines were included for analysis. Suitable content included information related to malnutrition such as definition, signs and symptoms, cause-consequences, and nutrition management, which included food plate, serving size, menu suggestion, examples of recipes, tips to increase energy and protein intakes through food or drink, texture modification, a guide to using oral nutritional supplements, tips for maintaining nutrient content in food and drink, tips to encourage to eat, and oral health. Conclusion: A nutrition resource kit tailored for malnourished and at-risk elderly would be a beneficial nutrition intervention. There is a need to incorporate these information in the development of a nutrition resource kit to improve their dietary intake.

Losses, Gains, and Changes to the Food Environment in a Rural Kentucky County during the COVID-19 Pandemic.

The COVID-19 pandemic has caused alterations to be made in the way many people access, prepare, and consume food. Rural communities are particularly impacted due to pre-existing structural vulnerabilities, i.e., poverty, lack of infrastructure, and limited fresh food options. This study aimed to characterize experiences of one rural Appalachian community’s changes to the food environment during the pandemic. In April 2021, six focus groups were conducted with residents of Laurel County, Kentucky. Using grounded theory, we identified losses, gains, and overall changes to the community food environment since the onset of COVID-19. Seventeen Laurel Countians (17 female; ages 30–74) participated in the six focus groups. Three main themes emerged regarding food environment changes—(1) modifications of community food and nutrition resources, (2) expansion and utilization of online food ordering, and (3) implications of the home food environment. Rural communities faced considerable challenges during the COVID-19 pandemic, in part, due to gaps in existing infrastructure and loss of pre-existing resources. This study illustrates the complexity of changes occurring during COVID-19. Using the preliminary data obtained, we can better understand pre-existing issues in Laurel County and suggestions for future programming to address the inequitable access and response during public health emergencies and beyond.

The ontology of fast food facts: conceptualization of nutritional fast food data for consumers and semantic web applications

BackgroundFast food with its abundance and availability to consumers may have health consequences due to the high calorie intake which is a major contributor to life threatening diseases. Providing nutritional information has some impact on consumer decisions to self regulate and promote healthier diets, and thus, government regulations have mandated the publishing of nutritional content to assist consumers, including for fast food. However, fast food nutritional information is fragmented, and we realize a benefit to collate nutritional data to synthesize knowledge for individuals.MethodsWe developed the ontology of fast food facts as an opportunity to standardize knowledge of fast food and link nutritional data that could be analyzed and aggregated for the information needs of consumers and experts. The ontology is based on metadata from 21 fast food establishment nutritional resources and authored in OWL2 using Protégé.ResultsThree evaluators reviewed the logical structure of the ontology through natural language translation of the axioms. While there is majority agreement (76.1% pairwise agreement) of the veracity of the ontology, we identified 103 out of the 430 statements that were erroneous. We revised the ontology and publicably published the initial release of the ontology. The ontology has 413 classes, 21 object properties, 13 data properties, and 494 logical axioms.ConclusionWith the initial release of the ontology of fast food facts we discuss some future visions with the continued evolution of this knowledge base, and the challenges we plan to address, like the management and publication of voluminous amount of semantically linked fast food nutritional data.

Pollen Feeding Reduces Predation of Northern Corn Rootworm Eggs (Coleoptera: Chrysomelidae, Diabrotica barberi) by a Soil-Dwelling Mite (Acari: Laelapidae: Stratiolaelapsscimitus).

Simple SummaryFlowering plants are used to enhance pest control by predators and parasitoids, but insect herbivores can also use floral resources. We documented the species of adult rootworm beetles on key plants, and found that northern corn rootworm (NCR) adults were commonly associated with sunflower inflorescences while western corn rootworm adults were most abundant in corn and on squash blossoms. Consumption of sunflower and corn pollen by NCR adults did not impact predation of their eggs by an omnivorous mite, but a predatory soil-dwelling mite ate pest eggs less frequently and took longer to feed on eggs when NCR adults had fed on sunflower pollen. While increasing plant diversity can benefit natural enemies and pest control within agroecosystems, it is important to consider how floral resources alter dietary preferences of biocontrol agents.Landscape diversification with flowering plants can benefit pollinators and natural enemies, although insect pests can also use floral resources for nutrition and chemoprotection. Corn rootworms (Coleoptera: Chrysomelidae, Diabrotica spp.) are major pests of corn (Zea mays L.), and while subterranean larvae primarily feed on corn roots, adult rootworms commonly consume floral resources from other plant species. We quantified the species, density, and sex of adult corn Diabroticite rootworm beetles on wild and cultivated sunflower, corn, and squash, quantified pollen within the bodies of adult northern corn rootworms [NCR, D. barberi (Smith & Lawrence)], and investigated how consumption of sunflower and corn pollen by NCR adults impacted predation of their eggs by two soil-dwelling mites with different feeding specialization. NCR were the most common Diabroticite species on sunflower inflorescences and western corn rootworm (WCR, D. v. virgifera LeConte) were more abundant in corn and squash blossoms. Pollen feeding by NCR adults did not impact egg predation by omnivorous Tyrophagus putrescentiae (Schrank) (Acari: Sarcoptiformes, Acaridae), but predatory Stratiolaelaps scimitus (Womersley) (Acari: Mesostigmata, Laelapidae) ate eggs less frequently and took longer to feed on eggs from NCR females that had fed on sunflower pollen. This research suggests pollen feeding by adult NCR can impact predation of their eggs. While increasing plant diversity can benefit natural enemies and pest control within agroecosystems, it is important to consider how floral resources alter dietary preferences of biocontrol agents.

Tissue-specific transcriptional patterns underlie seasonal phenotypes in honey bees (Apis mellifera).

Faced with adverse conditions, such as winter in temperate regions or hot and dry conditions in tropical regions, many insect species enter a state of diapause, a period of dormancy associated with a reduction or arrest of physical activity, development and reproduction. Changes in common physiological pathways underlie diapause phenotypes in different insect species. However, most transcriptomic studies of diapause have not simultaneously evaluated and compared expression patterns in different tissues. Honey bees (Apis mellifera) represent a unique model system to study the mechanisms underpinning diapause-related phenotypes. In winter, honey bees exhibit a classic diapause phenotype, with reduced metabolic activity, increased physiological nutritional resources and altered hormonal profiles. However, winter bees actively heat their colony by vibrating their wing muscles; thus, this tissue is not quiescent. Here, we evaluated the transcriptional profiles of flight muscle tissue and fat body tissue (involved in nutrient storage, metabolism and immune function) of winter bees. We also evaluated two behavioural phenotypes of summer bees: nurses, which exhibit high nutritional stores and low flight activity, and foragers, which exhibit low nutritional stores and high flight activity. We found winter bees and nurses have similar fat body transcriptional profiles, whereas winter bees and foragers have similar flight muscle transcriptional profiles. Additionally, differentially expressed genes were enriched in diapause-related gene ontology terms. Thus, honey bees exhibit tissue-specific transcriptional profiles associated with seasonal phenotypes, laying the groundwork for future studies evaluating the mechanisms, evolution and consequences of this tissue-specific regulation.

Variable intraspecific space use supports optimality in an apex predator

Within optimality theory, an animal’s home range can be considered a fitness-driven attempt to obtain resources for survival and reproduction while minimizing costs. We assessed whether brown bears (Ursus arctos) in two island populations maximized resource patches within home ranges (Resource Dispersion Hypothesis [RDH]) or occupied only areas necessary to meet their biological requirements (Temporal Resource Variability Hypothesis [TRVH]) at annual and seasonal scales. We further examined how intrinsic factors (age, reproductive status) affected optimal choices. We found dynamic patterns of space use between populations, with support for RDH and TRVH at both scales. The RDH was likely supported seasonally as a result of bears maximizing space use to obtain a mix of nutritional resources for weight gain. Annually, support for RDH likely reflected changing abundances and distributions of foods within different timber stand classes. TRVH was supported at both scales, with bears minimizing space use when food resources were temporally concentrated. Range sizes and optimal strategies varied among sex and reproductive classes, with males occupying larger ranges, supporting mate seeking behavior and increased metabolic demands of larger body sizes. This work emphasizes the importance of scale when examining animal movement ecology, as optimal behavioral decisions are scale dependent.

The Roles of Nutrition Education and Food Vouchers in Improving Child Nutrition: Evidence from a Field Experiment in Ethiopia

Mothers’ lack of knowledge about child nutrition and limited resources lead to poor diets among children in developing countries, increasing their risk of chronic undernutrition. We implemented a cluster randomized control trial that randomly provides four-month-long Behavior Change Communication (BCC) and food vouchers in Ethiopia. We find improvements in child-feeding practices and a reduction in chronic child undernutrition only when BCC and vouchers are provided together. BCC or voucher alone had limited impacts. Our results highlight the importance of adding an effective educational component to existing transfer programs.

Monthly anomalies of sea surface chlorophyll-a concentration in the Khanh Hoa waters of Vietnam related to ENSO phenomenon

Based on the monthly averaged sea surface chlorophyll-a concentration data continuously for more than 17 years (Jul. 2002–Dec. 2019), the analyzed results show that the averaged chlorophyll-a concentration in Khanh Hoa waters was 0.58 mg/m3, and the monthly average variation was ± 0.14 mg/m3 (that is equivalent to about ± 24%). Under the impact of ENSO phenomena, in the years when the double La Niña events occurred (two consecutive years in the La Nina event occurs), the chlorophyll-a anomaly index fluctuated from -0.99 mg/m3 to 1.62 mg/m3. These are very strong fluctuation levels, corresponding to the decrease or increase in chlorophyll-a concentration from 86% to 279%. In the El Niño years, the fluctuations of chlorophyll-a concentration were little affected unless the two previous years in which the double La Niña event occurred. These fluctuations have significantly impact nutritional resources and water quality because chlorophyll-a concentration is one of the key indices in studying the health status of any natural marine ecosystem. In addition, chlorophyll-a concentration in Khanh Hoa waters often varies between seasons. The averaged chlorophyll-a concentration reaches its maximum value in the winter, then decreases gradually in the spring and usually reaches the minimum value in the summer, then rises gradually again in the autumn.

Establishing the need for provider education on cancer and nutrition (PECAN): Survey results on nutrition practices at a large community oncology practice.

49 Background: Oncology providers and patients benefit from evidence-based nutritional resources to support cancer care. For patients, proper nutrition care can prevent inappropriate weight loss, improve treatment tolerance, and improve quality of life. Recent literature has noted the lack of both adequate dietitian resources at outpatient centers and comprehensive nutrition guidelines in cancer care. At a large community practice with 210 locations across Texas and Oklahoma, a survey was developed and administered to assess nutrition practices. Methods: Clinic directors in the practice completed a survey to assess for the presence or absence of a malnutrition screen; how nutrition concerns are addressed; and the availability of a dietitian. Results: A total of 26 responses detailed the nutrition processes at 50 unique locations. At 37 (74%) locations, a malnutrition screening tool was utilized and of these, 30 (81%) locations reported utilizing the Malnutrition Screening Tool (MST), a brief, validated tool for outpatient settings including oncology. Seven (19%) sites did not specify what tool was used. Of the clinics that reported completing a malnutrition screen for patients, the screen was completed by the advanced practice provider (APP)/physician in 18 (49%) clinics, a nurse in 4 (11%) clinics, a dietitian in 4 (11%) clinics and a medical assistant in 1 (3%) clinic. At 10 sites more than one provider type was responsible for completing the screen. Nutrition issues were addressed by physicians, APPs, and nurses in 15 (50%), 35 (70%), and 9 (14%) sites respectively (see table). Twenty-two locations (44%) reported referring patients to a dietitian and 10 sites (20%) had a dietitian available in clinic. Forty-one (82%) clinics employed more than one method for addressing nutrition issues. Sixteen of 26 respondents (62%) reported that increased dietitian access would be helpful; this included respondents whose locations already had a dietitian available. Conclusions: Overall, 74% of reporting locations used a malnutrition screening tool and 20% had access to a dietitian on site. Forty-four percent of sites referred to a dietitian if there was a need. This indicates that multiple providers are involved in the nutritional care of oncology patients. In response to these findings, the multidisciplinary PECAN Taskforce was created to develop comprehensive malnutrition screening, implement a referral process for all at-risk patients, enhance nutrition education, and expand dietitian services. Further study will measure the impact of expanded nutrition access on patient outcomes.[Table: see text]

Maternal diet affects utilization of endogenous lipids by red drum Sciaenops ocellatus embryos and early larvae.

Embryonic and early larval development and metabolism of most teleost fishes are fueled entirely by maternally derived nutritional resources (yolk and oil) before the onset of exogenous feeding. The composition of those resources depends, in part, on maternal diet. To examine how diet-induced variations in egg composition affect embryonic and larval utilization of endogenous lipids and fatty acids, we fed red drum (Sciaenops ocellatus) broodstock four different diets to produce distinctive fatty acid compositions in eggs but with no significant difference in total lipid content. We sampled embryos and unfed larvae every 12h from 12h post-fertilization (hpf) until starvation (96-120 hpf; n=5 spawns per diet group). Rates of utilization of the oil globule were significantly different among diet groups, resulting in significant differences in mean oil globule size at the first feeding stage (84 hpf). Utilization rates for 15 fatty acids were significantly different among diet groups and were proportional to their initial concentration. As a result, differences in larval fatty acid compositions among maternal diet groups diminished over time but remained different even at later stages. In addition, larval standard length at 84 hpf was positively correlated with egg total lipid content. This study suggests that the fatty acid composition of yolk and oil affects energy metabolism and tissue composition in red drum larvae. These effects could have consequences for the survival and essential physiological functions of fish larvae during the critical period of transition to exogenous feeding.

FORTIFICATION OF PASTA WITH AMARANTH LEAF POWDER AND DEFATTED SOY FLOUR: EFFECTS ON PHYSICAL, COOKING AND SENSORY CHARACTERISTICS

Natural nutritional resources like cereals, legume, fruits and vegetables contains plenty of nutrients as antioxidants, vitamins, dietary fibres, minerals, proteins and phenolic compounds. Incorporation of these nutritional resources in staple foods like pasta increases nutritional as well as functional value for health improvement or disease prevention. Amaranthus and Soy has been traditionally considered as an important functional component in ancient meals, and are also popular crops due to its high nutritional value and easy availability which suggests their incorporation in main stream meals and snacks to fight malnutrition. In the current study, an attempt has been made to fortify the pasta with varying proportion of Amaranth Leaf Powder (ALP) and Defatted Soy Flour (DSF) alone and in combination with Control pasta to improve the nutritional components. Since, the fortification may affect the different properties of pasta, therefore the sensory, cooking and physical properties (flours) of the Control and fortified pasta were studied. Results of this study indicated that the Control pasta fortified with DSF (16%) and ALP (6%) alone and in-combination {Control: DSF (16%): ALP (6%)} scored highest sensory acceptability in comparison to other combinations. Control pasta with DSF (16%) shown the maximum bulk density and swelling capacity. The maximum gluten content was found in Control pasta as compared to other groups. There was minimum gruel loss observed in case of Control: DSF in comparison to other fortified groups. Taken together, the current study suggested that the fortification of pasta with DSF and ALP could be one of the potential approaches for enhancing the nutritional value with the highest acceptability of staple food like pasta particularly in respect of ease of preparation, sensory appeal, long storage capability and cost effectiveness.

Nutritional resources of the yeast symbiont cultivated by the lizard beetle Doubledaya bucculenta in bamboos

Symbiotic fungi of wood-inhabiting insects are often considered to aid wood digestion of host insects when the associated fungi can assimilate wood-associated indigestible materials. In most cases, however, the components of wood that are utilized by fungal symbionts remain poorly understood. The lizard beetle Doubledaya bucculenta (Coleoptera, Erotylidae, Languriinae) farms the symbiotic yeast Wickerhamomyces anomalus inside the cavity of host bamboo internodes, which serves as food for larvae. To determine the carbon sources of the internodes serving as nutritional substrates for W. anomalus, we used ion exchange chromatography measurements to analyze free and structural sugar compositions in fresh pith (FP), yeast-cultured pith (YP), and larva-reared pith (LP) of internodes. Glucose and fructose were the major free sugars in FP and markedly decreased in YP and LP. For structural sugars, no sugar significantly decreased in YP or LP compared with FP. Carbon assimilation tests showed that W. anomalus assimilated glucose, mannose, fructose, and sucrose strongly, xylose and cellobiose moderately, and xylan weakly. Elemental analysis revealed that the compositions of carbon, hydrogen, and nitrogen were not significantly different among tissue types. These results suggest that W. anomalus does not consume bamboo-associated indigestible sugars but most free sugars, mainly glucose and fructose, in the pith. Our findings suggest that a symbiont’s abilities may not always benefit its host in nature.

Survey of bee friendly flowering plants and bee-plant interaction in an urban green space in Bengaluru, India

Aim: To study bee friendly plant species, nutritional sources, flowering season, and the dynamic relationship between urban flora and native bee species in a centrally located urban green space in Bengaluru, India. Methodology: Flowers of different plant species visited by bees were observed and recorded from September 2018 to August 2019. Based on the foraging pattern of visiting bees, the plants were classified into nectar or pollen or both nectar and pollen species. The monthly abundance of nutritional resources was estimated based on the floral phenology. Results: A total of 51 plant species, from 25 families, were visited by bees for foraging. Polylectic social bees namely Apis florea and Tetragonula iridipennis, visited 45 and 39 plant species, and two species of solitary bees, namely Amigella cingulate and Xylocopa violacea, visited 26 and 23 plant species, respectively. The urban green landscape was dominated by a variety of ornamental plants (49%) and also included vegetables (17.6%), fruit trees (13.7%), and weeds (19.6%). Plants that served as a source of both nectar and pollen (60.8%) were predominant over those that supplied either nectar alone (24.5%) or pollen alone (13.7%). Moreover, 72% of the species bloomed all the year round, which meant that floral resources were available to bees throughout the year. Interpretation: The study underscores the role of bee friendly floral diversity in the urban green spaces in protection and conservation of bee diversity. Efficient management of urban green spaces can provide dynamic habitat for bee conservation and can prevent the loss of biodiversity.

The Specialist Marine Herbivore Elysia papillosa Grows Faster on a Less Utilized Algal Diet.

AbstractMany small specialist herbivores utilize their food resources both for nutrition and as a structural refuge or resource. Trophic linkage cannot solely be inferred from physical association of herbivores with a potential food item, because herbivores may temporarily inhabit algae or plants on which they do not feed. Elysia papillosa, a small sacoglossan sea slug, consumes and sequesters chloroplasts from the siphonaceous, chlorophytic alga Penicillus capitatus; it also maintains moderate densities on this alga. Recently, E. papillosa was also infrequently found in association with the alga Penicillus lamourouxii, which displays density similar to that of P. capitatus. After collecting E. papillosa from each of the two algal species from a shallow-water site along the west central coast of Florida, we used DNA barcoding of the rbcL gene sequences in order to determine whether the slug was consuming both algal species. The molecular data indicated that E. papillosa consumed and sequestered chloroplasts from the same algal species from which they were collected. A laboratory feeding experiment tested whether algal diet (P. capitatus or P. lamourouxii) had an impact on slug growth rate as measured by change in body size (mm). After 3 weeks E. papillosa fed P. lamourouxii achieved a mean body length that was 1.5-2 times that recorded for slugs fed P. capitatus, but maximum growth depended on the original field host. Thus, while the highest densities of E. papillosa in the field occurred on P. capitatus, slugs grew much faster on P. lamourouxii in the laboratory. The observed association of E. papillosa with P. capitatus must be related to other factors, such as foraging efficiency, algal morphology, algal biochemistry, or algal suitability as a refuge.

Local indigenous knowledge of salmea scandens (l.) Dc. (asteraceae), a medicinal and nutritional resource from oaxaca, Mexico

Salmea scandens is a plant that grows in America tropics and is known for its medicinal and nutritional applications. Derived from local indigenous knowledge, the species is used for its analgesic properties, especially as remedy in dentistry in communities of the southern highlands of Oaxaca, Mexico. Important information on local knowledge and uses of S. scandens was gathered using a bibliographic review and with open and semi-structured interviews conducted in a Zapotec community in the Southern Mountains of Oaxaca. In the community studied people recognize and use two morphotypes of the plant that differentiate by the color of the bark (black and white). We reported two not documented uses for this species, one nutritional and one medicinal. In the nutritional form, the plant is used to season traditional dishes and as the main ingredient of other recipes. In medicinal uses, the plant treats dental pain, gastritis, and boils. Community prefer the white morphotype for nutritional use, but there is no preference for any of them for medicinal use. The medicinal use of S. scandens is related to problems that involve an inflammatory process, suggesting that the species has a potential in the search for new products to treat odontalgia.
 
 Salmea scandens es una planta que crece en los trópicos de América y es conocida por sus aplicaciones medicinales y nutricionales. Derivado del conocimiento indígena local, la especie se utiliza por sus propiedades analgésicas, especialmente como remedio en odontología en comunidades de las tierras altas del sur de Oaxaca, México. Se recopiló información importante sobre el conocimiento local y los usos de S. scandens mediante una revisión bibliográfica y con entrevistas abiertas y semiestructuradas realizadas en una comunidad zapoteca en las montañas del sur de Oaxaca. En la comunidad estudiada, las personas reconocen y usan dos morfotipos de la planta que se diferencian por el color de la corteza (blanco y negro). Reportamos dos usos no documentados para esta especie, uno nutricional y uno medicinal. En forma nutricional, la planta se utiliza para sazonar platos tradicionales y como ingrediente principal de otras recetas. En usos medicinales, la planta trata el dolor dental, la gastritis y los forúnculos. La comunidad tiene preferencia por el morfotipo blanco para uso nutricional, pero no hay preferencia por ninguno de ellos para uso medicinal. El uso medicinal de S. scandens está relacionado con problemas que implican un proceso inflamatorio, lo que sugiere que la especie tiene potencial en la búsqueda de nuevos productos para tratar la odontalgia.

Connecting Families to Food Resources amid the COVID-19 Pandemic: A Cross-Sectional Survey of Early Care and Education Providers in Two U.S. States.

Early care and education (ECE) settings are important avenues for reaching young children and their families with food and nutrition resources, including through the U.S. federally funded Child and Adult Care Food Program (CACFP). Researchers conducted a cross-sectional survey of ECE providers in two U.S. states in November 2020 to identify approaches used to connect families with food and nutrition resources amid the COVID-19 pandemic. Logistic regression models were used to estimate odds of sites reporting no approaches and adjusted Poisson models were used to estimate the incidence rate ratio of the mean number of approaches, comparing sites that participate in CACFP to those that did not. A total of 589 ECE sites provided responses. Of those, 43% (n = 255) participated in CACFP. CACFP participating sites were more likely to report using any approaches to connecting families to food resources and significantly more likely to report offering “grab and go” meals, providing meal delivery, distributing food boxes to families, and recommending community food resources than non-CACFP sites. This study suggests that CACFP sites may have greater capacity to connect families to food resources amid emergencies than non-CACFP participating sites.

Genetic and Usurpation Data Support High Incidence of Bumble Bee Nest Invasion by Socially Parasitic Bumble Bee, Bombus insularis.

Cuckoo bumble bees (Psithyrus) (Lepeletier, 1832) (Hymenoptera: Apidae) are a unique lineage of bees that depend exclusively on a host bumble bee species to provide nesting material, nutritional resources, and labor to rear offspring. In this study, we document usurpation incidence and population genetic data of Bombus insularis (Smith, 1861) (Hymenoptera: Apidae), a bumble bee species in the Psithyrus subgenus, on field-deployed B. huntii colonies in northern Utah, United States. Within 12 d of deploying B. huntii Greene, 1860 (Hymenoptera: Apidae) colonies at two field sites, 13 of the 16 colonies contained at least one established B. insularis female. Although our results demonstrate that field-deployed bumble bee colonies are highly susceptible to B. insularis usurpation, applying a fabricated excluder to prevent the inquiline from invading a colony was 100% effective. Sibship analysis using microsatellite genotype data of 59 B. insularis females estimates that they originated from at least 49 unique colonies. Furthermore, sibship analysis found siblings distributed between the field sites that were 7.04 km apart. Our result suggests that B. insularis females have the capacity to disperse across the landscape in search of host colonies at distances of at least 3.52 km and up to 7.04 km. Our study underscores the detrimental impact B. insularis usurpation has on the host bumble bee colony. As B. insularis significantly impacts the success of bumble bee colonies, we briefly discuss how the utilization of excluders may be useful for commercial bumble bee colonies that are used to pollinate open field crops.

Effects of the short- and long-term accumulation of detritus in larval habitats on life history traits of Aedes aegypti in temperate Argentina.

Aedes aegypti larvae that develop in containers largely depend on plant detritus as a source of nutritional resources. However, few studies have evaluated the performance of immature individuals under natural amounts and quality of this food source. Here, we aimed to assess the effect of the variation in the accumulation time and amount of detritus on life history traits of Ae. aegypti under semi-field conditions. Ae. aegypti larvae were raised with detritus collected in different sites to represent natural variability in its amount, simulating short (28 days) and long (70 days) accumulation. A control with optimal food conditions (yeast) was included. Survival, development time and wing length of adults were compared among treatments. Survival was relatively high in all treatments. Development time was similar among treatments but significantly longer and more variable in containers with the lowest detritus amounts. Wing lengths were smaller in the treatments with detritus than in the control, especially in females. The results support the hypothesis that, in a temperate region, Ae. aegypti larvae may have a nutritional limitation, at least in some containers, and emphasize the importance of performing experiments that simulate the environmental conditions to which individuals are exposed in nature.