scholarly journals The Role of Antennae in Heat Detection and Feeding Behavior in the Bed Bug (Hemiptera: Cimicidae)

2020 ◽  
Vol 113 (6) ◽  
pp. 2858-2863
Author(s):  
Sudip Gaire ◽  
Coby Schal ◽  
Russell Mick ◽  
Zachary DeVries
Keyword(s):  
Heat Source ◽  
Antennal Segment ◽  
Well Being ◽  
Radiant Heat ◽  
Bed Bugs ◽  
Host Attraction ◽  
Bed Bug ◽  
The Common ◽  
Health And Well Being

Abstract The common bed bug (Cimex lectularius L.) is an obligate hematophagous ectoparasite that has significant impacts on human health and well-being. All life stages of bed bugs (except eggs) feed solely on blood, which is required to molt and reproduce. Bed bugs use multiple cues to locate their hosts, including heat, CO2, and body odors. Of these cues, detection of heat appears limited to a short distance of <3 cm. However, it remains unclear if bed bugs can detect radiant heat, what structure(s) are responsible for heat detection, and if heat detection via the antennae is required for feeding. In this study, bed bug response to radiant heat was evaluated using the two-choice T-maze assay with the heat source either in contact with the surface (i.e., conduction) or not in contact (i.e., radiation) in nonantennectomized bed bugs. Further, we systematically ablated the bed bug’s antennal segments (distal tip, first segment, and all four segments) and assessed their responses to heat and feeding in a unique two-choice T-maze assay and individual feeding assays, respectively. Our two-choice assays with contact to or no contact with the surface indicated that bed bugs cannot detect radiant heat. Later, we found that the distal tip of the terminal antennal segment is responsible for orientation toward a heat source. However, >50% of the bed bugs fed even when the entire antenna was removed, suggesting redundancy in sensory cues that drive feeding. These results will be used to better understand the role heat plays in bed bug host attraction and design of traps.

The Behavioral Response to Heat in the Common Bed Bug,Cimex lectularius (Hemiptera: Cimicidae)

2021 ◽  
Author(s):  
Raymond Berry
Keyword(s):  
Petri Dish ◽  
Cimex Lectularius ◽  
Bed Bugs ◽  
Bed Bug ◽  
Host Interaction ◽  
Video Images ◽  
Spherical Ball ◽  
The Common ◽  
Vertebrate Hosts

AbstractThe bed bug, Cimex lectularius L., is a common ectoparasite found to live among its vertebrate hosts. Antennal segments in bugs are critical for sensing multiple cues in the environment for survival. To determine whether the thermo receptors of bed bugs are located on their antennae; innovative bioassays were created to observe the choice between heated and unheated stimuli and to characterize the response of bugs to a heat source. Additionally, the effect of complete antenectomized segments on heat detection were evaluated. Heat, carbon dioxide, and moisture are cues that are found to activate bed bug behavior; a temperature at 38°C was used to assess the direction/degree at which the insect reacts to the change in distance from said stimulus. Using a lightweight spherical ball suspended by air through a vacuum tube, bed bugs and other insects are able to move in 360° while on a stationary point. Noldus EthoVision XT was used to capture video images and to track the bed bugs during 5-min bioassays. A bioassay was created using four Petri dish arenas to observe bed bug attraction to heat based on antennae segments at 40°C. The purpose of this study was to evaluate the effects of heat on complete antenectomized segments of the antennae. The results in this experiment suggest that bed bugs detect and are attracted to heat modulated by nutritional status. Learning the involvement of antennae segments in heat detection will help identify the location and role of thermoreceptors for bed bug host interaction.

Gender Equity and the SDGs

2018 ◽  
Author(s):  
Elizabeth Dettori ◽  
Geeta Rao Gupta
Keyword(s):  
Gender Equity ◽  
Adolescent Girls ◽  
Well Being ◽  
Economic Resources ◽  
The Sustainable Development ◽  
Global Partnership ◽  
Development Goals ◽  
Gender Based ◽  
Health And Well Being

This chapter identifies some of the most stubborn gender-based risks and vulnerabilities girls face as a cohort from preadolescence through late adolescence across the domains of personal capabilities, security, safety, economic resources, and opportunities. It reviews progress made during the Millennium Development Goal era in improving girls’ health and well-being and looks to the role of adolescent girls in advancing the Sustainable Development Goals. The chapter concludes by recommending an approach for global partnership that is linked to national and local actions and that is centered on priority interventions that can catalyze change, at scale, for adolescent girls.

Pateicības izpausmes folklorā psiholoģiskā kontekstā

2021 ◽  
pp. 42-53
Author(s):  
Ieva Ančevska
Keyword(s):  
Family Relationships ◽  
Positive Emotions ◽  
Emotional Health ◽  
Human Life ◽  
Well Being ◽  
Psychological Research ◽  
Neuroscience Research ◽  
Health And Well Being

The article examines the depiction of gratitude and related events in Latvian folklore through comparative evaluation. Gratitude is considered in a psychological context, comparing the attitude expressed in folklore with the findings of modern scientific research. Gratitude is a concept that is usually associated with a relationship or a benefit, it is most often aimed outwards, dedicated to someone else, but at the same time, it creates a pleasant feeling within the person. In modern psychology, gratitude is receiving more and more attention from researchers because its manifestations stimulate the formation of positive emotions and contribute to the improvement of the person’s overall well-being. Research and clinical studies in psychotherapy confirm that gratitude plays an important role in improving mental health and reducing depressive, destructive feelings. In turn, neuroscience research shows the potential of a grateful and positive attitude in strengthening psycho-emotional health and well-being in general. In Latvian folklore, gratitude is depicted as an important part of ritual events, which helps to ensure a positive, balanced connection with the forces of nature, gods, and society. In folklore, the importance of gratitude is emphasised more when building family relationships or accepting various situations and occurrences in life. In both psychological research and the practice of systemic therapy, as well as in folklore, gratitude appears as one of the most important values of interpersonal connection, which promotes the formation of harmonious relationships. Similar to the opinions of psychology, the folk world views emphasise the motivational role of gratitude in improving the quality of human life and health in general.

scholarly journals Advancing environmental public health in Latin America and the Caribbean

2021 ◽  
Vol 45 ◽  
pp. 1
Author(s):  
Marcelo Korc ◽  
Fred Hauchman
Keyword(s):  
Public Health ◽  
Latin America ◽  
Health Sector ◽  
Well Being ◽  
Leadership Role ◽  
The Public ◽  
Environmental Public Health ◽  
The Caribbean ◽  
Health And Well Being

This paper highlights the important leadership role of the public health sector, working with other governmental sectors and nongovernmental entities, to advance environmental public health in Latin America and the Caribbean toward the achievement of 2030 Sustainable Development Goal 3: Health and Well-Being. The most pressing current and future environmental public health threats are discussed, followed by a brief review of major historical and current international and regional efforts to address these concerns. The paper concludes with a discussion of three major components of a regional environmental public health agenda that responsible parties can undertake to make significant progress toward ensuring the health and well-being of all people throughout Latin America and the Caribbean.

scholarly journals Bed bugs: The move to humans as hosts

FACETS ◽  
2019 ◽  
Vol 4 (1) ◽  
pp. 105-110 ◽  
Author(s):  
Benoit Talbot ◽  
Nusha Keyghobadi ◽  
Brock Fenton
Keyword(s):  
Rapid Growth ◽  
Host Species ◽  
Blood Feeding ◽  
Living Conditions ◽  
Pest Species ◽  
Insectivorous Birds ◽  
Bed Bugs ◽  
Bed Bug ◽  
Ecological Success ◽  
The Common

Cimicid insects, bed bugs and their allies, include about 100 species of blood-feeding ectoparasites. Among them, a few have become widespread and abundant pests of humans. Cimicids vary in their degree of specialization to hosts. Whereas most species specialize on insectivorous birds or bats, the common bed bug can feed on a range of distantly related host species, such as bats, humans, and chickens. We suggest that association with humans and generalism in bed bugs led to fundamentally different living conditions that fostered rapid growth and expansion of their populations. We propose that the evolutionary and ecological success of common bed bugs reflected exploitation of large homeothermic hosts (humans) that sheltered in buildings. This was a departure from congeners whose hosts are much smaller and often heterothermic. We argue that interesting insights into the biology of pest species may be obtained using an integrated view of their ecology and evolution.

The Role of the Supervisor in Creating and Maintaining an Emotionally Healthy Workplace

2022 ◽  
pp. 1715-1730
Author(s):  
Amy Tureen
Keyword(s):  
Higher Education ◽  
Social Media ◽  
Emotional Health ◽  
Well Being ◽  
Organizational Cultures ◽  
Educational Model ◽  
Positional Power ◽  
The Impact ◽  
Health And Well Being

Supervisors, be they employed in higher education or in other industries, operate in capacities that allow them to shape organizational cultures within their departments, divisions, colleges, or broader units. Within the higher educational model, this means that supervisors are uniquely placed to counteract negative elements within the culture of academia, which historically has tended to prioritize individual competitive output, with alternative models that may offer improvements to the emotional health and well-being of higher education employees. This chapter seeks to describe the impact of stress on the health of workers, the employment stressors that are unique to higher education, and the processes by which supervisors in higher education can use their positional power to counteract said stressors and improve academic organizational cultures. The chapter includes practical suggestions for supervisors to enhance wellness and decrease emotional harm in scenarios common to the higher education workplace as identified via social media crowdsourcing.

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