scholarly journals Sexual Competitiveness and Induced Egg Sterility by Aedes aegypti and Aedes albopictus Gamma-Irradiated Males: A Laboratory and Field Study in Mexico

Insects ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 145
Author(s):  
J. Guillermo Bond ◽  
Santiago Aguirre-Ibáñez ◽  
Adriana R. Osorio ◽  
Carlos F. Marina ◽  
Yeudiel Gómez-Simuta ◽  
...  
Keyword(s):  
Public Health ◽  
Aedes Albopictus ◽  
Sterile Insect Technique ◽  
Irradiation Dose ◽  
Mosquito Vectors ◽  
Field Cage ◽  
Egg Hatching ◽  
Public Health Threat ◽  
Medical Importance ◽  
Gamma Irradiated

The sterile insect technique may prove useful for the suppression of mosquito vectors of medical importance in regions where arboviruses pose a serious public health threat. In the present study, we examined the effects of sterilizing irradiation doses across different ratios of fertile:irradiated males on the mating competitiveness of Ae. aegypti and Ae. albopictus under laboratory and field-cage conditions. For both species, the percentage of females inseminated and the number of eggs laid over two gonotrophic cycles varied significantly in mating treatments involving 1:1, 1:5, and 1:10 fertile:irradiated males compared to controls of entirely fertile or entirely irradiated males but was not generally affected by the irradiation dose. Egg hatching was negatively affected in females exposed to increasing proportions of irradiated males in both laboratory and field cages. Male competitiveness (Fried’s index) values varied from 0.19 to 0.58 in the laboratory and were between 0.09 and 1.0 in field cages, depending on th species. Competitiveness values were negatively affected by th eirradiation dose in both species under field-cage conditions, whereas in the laboratory, Ae. albopictus was sensitive to the dose but Ae. aegypti was not. In general, male competitiveness was similar across all mating regimes. Most importantly, induced egg sterility was positively correlated with the proportion of irradiated males present in the mating treatments, reaching a maximum of 88% under field-cage conditions for both Ae. aegypti and Ae. albopictus males treated with 50 and 40 Gy irradiation, respectively. These results indicate that sterile males produced at our facility are suitable and competitive enough for field pilot SIT projects and provide guidance to decide the optimal sterile:fertile ratios.

scholarly journals New Distribution Record of Aedes albopictus in Quintana Roo, Mexico, and its Importance to Public Health

2020 ◽  
Vol 36 (3) ◽  
pp. 197-200
Author(s):  
Rahuel J. Chan-Chable ◽  
Edgardo Balam-Poot ◽  
Rafael Vázquez-Marroquín ◽  
Arely MartÍnez-Arce ◽  
Pedro C. Mis-Avila ◽  
...  
Keyword(s):  
Public Health ◽  
Aedes Albopictus ◽  
Control Strategies ◽  
Quintana Roo ◽  
Key Factor ◽  
Medical Importance ◽  
First Time ◽  
Distribution Record ◽  
New Distribution ◽  
Single Locality

ABSTRACT Aedes albopictus is an important vector of several arboviruses that affect human health worldwide; thus, knowledge of its distribution is a key factor for the implementation of disease control strategies. In Mexico, Ae. albopictus was recorded for the first time in 1988 in Tamaulipas State (northeast), but currently it has been recorded in 14 of the 32 states in the country. In 2012, it was recorded for the first time in a single locality in Quintana Roo (Cancún). In this study, we provide new distribution information for Ae. albopictus in the center and south of Quintana Roo State and comment on its medical importance.

scholarly journals West Nile Virus: Measures against Emergence in Malaysia

2019 ◽  
Vol 4 (1) ◽  
pp. 1-6
Author(s):  
Yasmin AR
Keyword(s):  
Public Health ◽  
West Nile Virus ◽  
Natural Habitat ◽  
The United States ◽  
Global Public Health ◽  
Mosquito Vectors ◽  
West Nile ◽  
Public Health Threat ◽  
Successful Establishment ◽  
Animal Vaccination

West Nile virus has a potential to emerge in new areas and cause large epidemics as was witnessed in the United States following its introduction in 1999. The virus is now a global public health threat, having been detected on every continent except Antarc tica. Once restricted to Africa, its expansion beyond its natural habitat is related to some viral, vectoral, anthropologic and environmental factors. The successful establishment and spread of the virus depend in part on viral adaptations, availability of competent hosts and mosquito vectors and suitable environmental conditions. A combination of measures can be applied to minimise the likelihood of a WN virus epidemic. Available vaccines are only for veterinary use, human vaccines are still in development . Vector control, animal vaccination, targeted surveillance and strong cooperation between relevant authorities are important in preventing a WN virus epidemic in Malaysia.

scholarly journals Egg Sterilisation of Irradiated Nezara viridula (Hemiptera: Pentatomidae)

Insects ◽  
2020 ◽  
Vol 11 (9) ◽  
pp. 564
Author(s):  
Kiran Jonathan Horrocks ◽  
Taylor Welsh ◽  
Jim E Carpenter ◽  
David Maxwell Suckling
Keyword(s):  
Dose Response ◽  
Sterile Insect Technique ◽  
Irradiation Dose ◽  
Nezara Viridula ◽  
Future Application ◽  
Halyomorpha Halys ◽  
Male And Female ◽  
Wide Range ◽  
Ongoing Development ◽  
Gamma Irradiated

Nezara viridula Linnaeus (Hemiptera: Pentatomidae) is a polyphagous pest of a wide range of economically important crops. Because the control of this species and other pentatomids relies primarily on insecticide application, investigation into the Sterile Insect Technique (SIT) is warranted. We aimed to investigate the irradiation biology of N. viridula for the potential application of SIT against this pest. Male and female N. viridula were gamma-irradiated at doses between 4 and 28 Gy and mated with both irradiated and nonirradiated conspecifics. Sterility of the resulting eggs followed a dose-response in each case. Irradiated males crossed with untreated females showed higher F1 egg sterility than crosses where the female was irradiated. The greatest F1 egg sterility was observed when both parents were irradiated. There was no obvious dose-response for the longevity of irradiated males, and for the fecundity of nonirradiated females mated with irradiated males. The fecundity of irradiated females appeared to decrease with irradiation dose. These results can be applied to a potential future application of SIT against N. viridula, but predominantly supports the ongoing development of SIT for Halyomorpha halys Stål (Hemiptera: Pentatomidae) and hemipteran pests in general.

LGBTQ Intimate Partner Violence

2017 ◽  
Author(s):  
Adam M. Messinger
Keyword(s):  
Public Health ◽  
Intimate Partner Violence ◽  
Partner Violence ◽  
Intimate Partner ◽  
Sexual Relationships ◽  
Evidence Based ◽  
Policy Practice ◽  
The Past ◽  
Victim Services ◽  
Public Health Threat

Many nations today recognize intimate partner violence (IPV) in romantic-sexual relationships as a major public health threat, yet not all victims are treated equally. Contrary to myths, lesbian, gay, bisexual, trans*, and queer (LGBTQ) people are more likely to experience IPV than heterosexual-cisgender people. Unfortunately, LGBTQ victims face major barriers to reaching safety in a world that too often stigmatizes their identities and overlooks their relationships when forming victim services and policies. Offering a roadmap forward, LGBTQ Intimate Partner Violence: Lessons for Policy, Practice, and Research is the first book to synthesize nearly all existing research from the past forty years on this pressing issue. At once highly organized and engaging, it provides evidence-based tips for academic and nonacademic audiences alike.

scholarly journals Descriptive Epidemiology of Rescue-Related Fatal Drowning in Turkey

2021 ◽  
Vol 18 (12) ◽  
pp. 6613
Author(s):  
Ali Işın ◽  
Adnan Turgut ◽  
Amy E. Peden
Keyword(s):  
Public Health ◽  
Retrospective Study ◽  
Relative Risk ◽  
Confidence Interval ◽  
Descriptive Epidemiology ◽  
Death Registry ◽  
Public Health Threat ◽  
Reduction Strategies ◽  
Media Reports ◽  
Risk Reduction Strategies

Drowning is a public-health threat and a leading cause of injury-related death. In Turkey, drowning results in 900 fatalities annually, and the rate is rising. As data on rescue-related drowning are scarce, this retrospective study explores the epidemiology of fatal drowning among rescuers in Turkey. As there are no routinely collected death registry data on drowning in Turkey, data were sourced from media reports of incidents between 2015 and 2019. Rescuer fatalities were analysed by age, sex, activity prior to rescue, location, incident day of week and season, and place of death. Statistical analyses comprised X2 tests of significance (p < 0.05) and calculation of relative risk (95% confidence interval) using fatality rates. In total, 237 bystander rescuers drowned (90% male; 35% 15–24 years). In 33% of cases, the primary drowning victim (PDV) was successfully rescued, while in 46% of cases the rescue resulted in multiple drowning fatalities (mean = 2.29; range 1–5 rescuers). Rescues were more likely to be successful in saving the PDV if undertaken at the beach/sea (X2 = 29.147; p < 0.001), while swimming (X2 = 12.504; p = 0.001), or during summer (X2 = 8.223; p = 0.029). Risk of bystander rescue-related fatal drowning was twice as high on weekdays compared to on weekends (RR = 2.04; 95%CI: 1.56–2.67). While bystanders play an important role in reducing drowning, undertaking a rescue is not without risk and can lead to multiple drowning incidents. Training in rescue and resuscitation skills (especially the prioritization of non-contact rescues) coupled with increasing awareness of drowning risk, are risk-reduction strategies which should be explored in Turkey.

scholarly journals A road-map for addressing antimicrobial resistance in low- and middle-income countries: lessons learnt from the public private participation and co-designed antimicrobial stewardship programme in the State of Kerala, India

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Sanjeev Singh ◽  
Esmita Charani ◽  
Sarada Devi ◽  
Anuj Sharma ◽  
Fabia Edathadathil ◽  
...  
Keyword(s):  
Public Health ◽  
Antimicrobial Resistance ◽  
Antimicrobial Stewardship ◽  
Infection Prevention ◽  
The State ◽  
Action Plans ◽  
Public And Private ◽  
Middle Income ◽  
Middle Income Countries ◽  
Public Health Threat

Abstract Background The global concern over antimicrobial resistance (AMR) is gathering pace. Low- and middle-income countries (LMICs) are at the epicentre of this growing public health threat and governmental and healthcare organizations are at different stages of implementing action plans to tackle AMR. The South Indian state of Kerala was one of the first in India to implement strategies and prioritize activities to address this public health threat. Strategies Through a committed and collaborative effort from all healthcare related disciplines and its professional societies from both public and private sector, the Kerala Public Private Partnership (PPP) has been able to deliver a state-wide strategy to tackle AMR A multilevel strategic leadership model and a multilevel implementation approach that included developing state-wide antibiotic clinical guidelines, a revision of post-graduate and undergraduate medical curriculum, and a training program covering all general practitioners within the state the PPP proved to be a successful model for ensuring state-wide implementation of an AMR action plan. Collaborative work of multi-professional groups ensured co-design and development of disease based clinical treatment guidelines and state-wide infection prevention policy. Knowledge exchange though international and national platforms in the form of workshops for sharing of best practices is critical to success. Capacity building at both public and private institutions included addressing practical and local solutions to the barriers e.g. good antibiotic prescription practices from primary to tertiary care facility and infection prevention at all levels. Conclusion Through 7 years of stakeholder engagement, lobbying with government, and driving change through co-development and implementation, the PPP successfully delivered an antimicrobial stewardship plan across the state. The roadmap for the implementation of the Kerala PPP strategic AMR plan can provide learning for other states and countries aiming to implement action plans for AMR.

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