scholarly journals Effectiveness of integrated Aedes albopictus management in southern Switzerland

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Damiana Ravasi ◽  
Diego Parrondo Monton ◽  
Matteo Tanadini ◽  
Eleonora Flacio
Keyword(s):  
Aedes Albopictus ◽  
Public Information ◽  
Control Measures ◽  
Intervention Programme ◽  
Information Campaigns ◽  
Breeding Sites ◽  
Mosquito Abundance ◽  
Adult Females ◽  
Public Areas ◽  
Manageable Level

Abstract Background The exotic invasive tiger mosquito, Aedes albopictus, appeared in southern Switzerland in 2003. The spread of the mosquito has been surveyed constantly since then, and an integrated vector management (IVM) has been implemented to control its numbers. The control measures focus on the aquatic phase of the mosquito with removal of breeding sites and applications of larvicides in public areas whereas private areas are reached through extensive public information campaigns. Here, we evaluated the efficacy of the IVM. Methods Since all the municipalities with Ae. albopictus in southern Switzerland are currently implementing the IVM, Italian municipalities just across the Swiss-Italian border, where Ae. albopictus is present but no coordinated intervention programme is in place, served as control. Ovitraps and adult female traps were used to measure mosquito abundance in 2019. Generalised mixed-effects models were used to model the numbers of Ae. albopictus eggs and adult females collected. These numbers of Ae. albopictus eggs were compared to the numbers of eggs collected in 2012 and 2013 in a previous assessment of the IVM, using a hurdle model. Results Mean numbers of Ae. albopictus eggs and adult females in 2019 were consistently higher in the municipalities not following an IVM programme. In these municipalities, there were about four times (3.8) more eggs than in the municipalities implementing an IVM programme. Also, the numbers of eggs and adult females increased steadily from the beginning of the Ae. albopictus reproductive season, reaching a peak in August. In contrast, the increase in numbers of Ae. albopictus was much more contained in the municipalities implementing an IVM programme, without reaching an evident peak. Comparison with data from 2012 and 2013 indicates that the gap between intervention and non-intervention areas may have almost doubled in the past 6 years. Conclusions The results of the survey strongly support the efficacy of the IVM programme implemented in southern Switzerland compared to municipalities without defined control measures. With the constant implementation of an IVM, it appears possible to contain the numbers of Ae. albopictus at a manageable level, reducing the nuisance for the human population and the risk of arbovirus epidemics. Graphical Abstract

scholarly journals Effectiveness of Integrated Aedes albopictus Management in Southern Switzerland

2020 ◽  
Author(s):  
Damiana Ravasi ◽  
Diego Parrondo Monton ◽  
Matteo Tanadini ◽  
Eleonora Flacio
Keyword(s):  
Aedes Albopictus ◽  
Adult Female ◽  
Control Measures ◽  
Intervention Programme ◽  
Information Campaigns ◽  
Breeding Sites ◽  
Mosquito Abundance ◽  
Adult Females ◽  
Public Areas ◽  
Manageable Level

Abstract BackgroundThe exotic invasive tiger mosquito, Aedes albopictus, appeared in southern Switzerland in 2003. The spread of the mosquito has been surveyed constantly since then and an integrated vector management (IVM) has been implemented to control its numbers. The control measures focus on the aquatic phase of the mosquito with removal of breeding sites and larvicide applications in public areas. Private areas are reached through extensive information campaigns to citizens. Here, we evaluated the efficacy of the IVM.MethodsSince all the municipalities with Ae. albopictus in southern Switzerland are currently implementing the IVM, Italian municipalities just across the Swiss-Italian border, where Ae. albopictus is present but no coordinated intervention programme is in place, served as control. Ovitraps and adult female traps were used to measure mosquito abundance in 2019. Generalised Mixed-Effects Models were used to model the numbers of Ae. albopictus eggs and adult females collected. The numbers of Ae. albopictus eggs were then compared to the numbers of eggs collected in 2012-2013 in a previous assessment of the IVM, using a hurdle model.ResultsMean Ae. albopictus egg and adult female numbers in 2019 were consistently higher in the municipalities not following an IVM programme. In these municipalities, there were about four times (3.8) more eggs than in the municipalities implementing an IVM programme. Also, the numbers of eggs and adult females increased steadily from the beginning of the Ae. albopictus reproductive season, reaching a peak in August. In contrast, the increase in numbers of Ae. albopictus was much more contained in the municipalities implementing an IVM programme, without reaching an evident peak. Comparison with data from 2012 and 2013 showed that the gap between intervention and non-intervention areas has almost doubled in the past six years.ConclusionsThe results of the survey demonstrate the efficacy of the IVM programme implemented in southern Switzerland, compared to municipalities not implementing defined control measures. With the constant implementation of an IVM, it is possible to contain the numbers of Ae. albopictus at a manageable level, reducing the nuisance for the human population and the risk of arbovirus epidemics.

scholarly journals The Impact of Policy Measures on Human Mobility, COVID-19 Cases, and Mortality in the US: A Spatiotemporal Perspective

2021 ◽  
Vol 18 (3) ◽  
pp. 996
Author(s):  
Yun Li ◽  
Moming Li ◽  
Megan Rice ◽  
Haoyuan Zhang ◽  
Dexuan Sha ◽  
...  
Keyword(s):  
Growth Rate ◽  
Human Mobility ◽  
Public Information ◽  
Key Factors ◽  
Information Campaigns ◽  
Rapid Spread ◽  
The Us ◽  
Policy Measures ◽  
The Impact ◽  
At Home

Social distancing policies have been regarded as effective in containing the rapid spread of COVID-19. However, there is a limited understanding of policy effectiveness from a spatiotemporal perspective. This study integrates geographical, demographical, and other key factors into a regression-based event study framework, to assess the effectiveness of seven major policies on human mobility and COVID-19 case growth rates, with a spatiotemporal emphasis. Our results demonstrate that stay-at-home orders, workplace closures, and public information campaigns were effective in decreasing the confirmed case growth rate. For stay-at-home orders and workplace closures, these changes were associated with significant decreases (p < 0.05) in mobility. Public information campaigns did not see these same mobility trends, but the growth rate still decreased significantly in all analysis periods (p < 0.01). Stay-at-home orders and international/national travel controls had limited mitigation effects on the death case growth rate (p < 0.1). The relationships between policies, mobility, and epidemiological metrics allowed us to evaluate the effectiveness of each policy and gave us insight into the spatiotemporal patterns and mechanisms by which these measures work. Our analysis will provide policymakers with better knowledge regarding the effectiveness of measures in space–time disaggregation.

scholarly journals Culturable bacteria associated with Anopheles darlingi and their paratransgenesis potential

2021 ◽  
Vol 20 (1) ◽  
Author(s):  
Elerson Matos Rocha ◽  
Osvaldo Marinotti ◽  
Deidre Machado Serrão ◽  
Laura Viana Correa ◽  
Ricardo de Melo Katak ◽  
...  
Keyword(s):  
Public Health Problem ◽  
Major Public Health Problem ◽  
Culturable Bacteria ◽  
Anopheles Darlingi ◽  
Next Generation ◽  
Bacterial Strains ◽  
Promising Alternative ◽  
Breeding Sites ◽  
Adult Females ◽  
Microbiological Techniques

Abstract Background Malaria remains a major public health problem in South America, mostly in the Amazon region. Among newly proposed ways of controlling malaria transmission to humans, paratransgenesis is a promising alternative. Paratransgenesis aims to inhibit the development of parasites within the vector through the action of genetically modified bacteria. The first step towards successful paratransgenesis in the Amazon is the identification of Anopheles darlingi symbiotic bacteria, which are transmitted vertically among mosquitoes, and are not pathogenic to humans. Methods Culturable bacteria associated with An. darlingi and their breeding sites were isolated by conventional microbiological techniques. Isolated strains were transformed with a GFP expressing plasmid, pSPT-1-GFP, and reintroduced in mosquitoes by feeding. Their survival and persistence in the next generation was assessed by the isolation of fluorescent bacteria from eggs, larvae, pupae and adult homogenates. Results A total of 179 bacterial strains were isolated from samples from two locations, Coari and Manaus. The predominant genera identified in this study were Acinetobacter, Enterobacter, Klebsiella, Serratia, Bacillus, Elizabethkingia, Stenotrophomonas and Pantoea. Two isolated strains, Serratia-Adu40 and Pantoea-Ovo3, were successfully transformed with the pSPT-1-GFP plasmid and expressed GFP. The fluorescent bacteria fed to adult females were transferred to their eggs, which persisted in larvae and throughout metamorphosis, and were detected in adult mosquitoes of the next generation. Conclusion Serratia-Adu40 and Pantoea-Ovo3 are promising candidates for paratransgenesis in An. darlingi. Further research is needed to determine if these bacteria are vertically transferred in nature.

scholarly journals Research on Organizational Communication

2007 ◽  
Vol 28 (1) ◽  
pp. 93-110 ◽  
Author(s):  
Catrin Johansson
Keyword(s):  
Organizational Communication ◽  
Case Study Research ◽  
Public Information ◽  
International Perspective ◽  
Internal Communication ◽  
Information Campaigns ◽  
Research Themes ◽  
Wide Definition ◽  
Definition Of

Abstract Swedish research on organizational communication is characterized by empirical, qualitative research. The tradition of holistic and profound case studies is strong. In this article, a wide definition of organizational communication is employed, including research focusing on both internal and external communication. Research themes and methods are reviewed and discussed. The majority of the studies concern public information, including health communication and crisis communication. Particularly, scholars have studied planning and evaluation of information campaigns concerning health, traffic and environment; and more recently, authority communication during major crises in society. Research focusing on organizations’ internal communication includes topics such as superior-subordinate communication, organizational learning, sensemaking, communication strategies and communication efficiency. Strengths and weaknesses following from this empirical case study research tradition are highlighted. Finally, the contribution of Swedish research in an international perspective is discussed.

Perspective on control options forEchinococcus multiloculariswith particular reference to Japan

Parasitology ◽  
2003 ◽  
Vol 127 (S1) ◽  
pp. S159-S172 ◽  
Author(s):  
A. ITO ◽  
T. ROMIG ◽  
K. TAKAHASHI
Keyword(s):  
Close Contact ◽  
Integrated Control ◽  
Risk Behaviour ◽  
Control Measures ◽  
Domestic Dogs ◽  
Western China ◽  
Preventive Strategies ◽  
Preventive Chemotherapy ◽  
Information Campaigns ◽  
Control Options

Following a brief introduction of recent advances in molecular and immunological technology for detection of persons and animals infected withEchinococcus multilocularisand an overview of the current situation of alveolar echinococcosis (AE) in Japan, perspectives on control options are discussed with reference to different epidemiological situations. AE is considered the most serious parasitic zoonosis in temperate and arctic regions of the northern hemisphere. The number of human cases differs drastically among regions. While high numbers of patients are apparently associated with highE. multilocularisprevalence in domestic dogs, e.g. in parts of Alaska and western China, the number of cases is moderate or low in areas where the parasite is mainly transmitted by wild canid species (e.g. in central Europe or temperate North America). However, the severity of the disease, the absence of curative treatment for most cases, the high cost of long-term chemotherapy and the anxiety caused for the population in highly endemic areas call for the development of preventive strategies even in regions where human AE is rare. Furthermore, in view of (1) drastically increasing numbers and infection rates of foxes involved in transmission ofE. multilocularis, and (2) increasingly close contact between humans and foxes e.g. in Europe and Japan, there is considerable concern that AE incidences may in future increase in these regions. Control options depend on a variety of factors including the species of canid principally responsible for transmission and the socio-economic situation in the region. Where domestic dogs (stray or owned) are the principal hosts forE. multilocularis, control options can include those applicable toE. granulosus, i.e. reduction of the number of stray dogs, registration and regular preventive chemotherapy of owned dogs, and information campaigns for the population promoting low-risk behaviour for man and dogs. WhereE. multilocularisis mainly transmitted by wild canids, the situation is far more difficult with preventive strategies still being in trial stage. Integrated control measures could include prevention information campaigns, restricting access of pet animals (dogs and cats) to rodents, chemotherapy of foxes on local or regional scales, and strategies to minimize contacts between people and foxes.

scholarly journals Biocidal potential of Eugenia pyriformis essential oil in the control of Rhipicephalus (Boophilus) microplus in the free-living cycle

2019 ◽  
Vol 39 (11) ◽  
pp. 879-888
Author(s):  
Jaqueline P. Medeiros ◽  
Wanessa C. Bortollucci ◽  
Eloisa S. Silva ◽  
Herika L.M. Oliveira ◽  
Caio F.A.A. Campo ◽  
...  
Keyword(s):  
Essential Oil ◽  
Immersion Test ◽  
Probit Analysis ◽  
Boophilus Microplus ◽  
Control Measures ◽  
Cattle Tick ◽  
Free Living ◽  
Adult Females ◽  
Southern Cattle Tick ◽  
Cattle Herds

ABSTRACT: Brazil has one of the largest commercial cattle herds in the world, which naturally coexist with an enormous number of parasitic species. Southern cattle tick, Rhipicephalus (Boophilus) microplus, is among these species, interfering with animal productivity and causing losses to the beef and dairy cattle sector. The use of chemical acaricides in the control of this mite has resulted in the emergence of resistant populations. In this sense, alternative control measures using plants as sources of botanical acaricides have shown to be effective. Eugenia pyriformis Cambess is a Brazilian plant with antioxidant and antimicrobial activity; however, there are no reports on its acaricidal activity in the literature. The present study aimed to evaluate the acaricidal and larvicidal potential of E. pyriformis leaf essential oil (EO) on southern cattle tick at different stages of the reproductive cycle. E. pyriformis leaves were collected and dried, and had their EO extracted by hydrodistillation (3h) using a modified Clevenger apparatus. Chemical analysis was performed by gas chromatography coupled with mass spectrometry (GC/MS), and 32 compounds belonging to the sesquiterpene class were identified: hydrocarbons (17.98%) and oxygenated forms (81.96%), with spathulenol (43.65%) and caryophyllene oxide (12.17%) as the most common. The EO was evaluated by the Adult Immersion Test at the concentrations (500.00 to 3.12mg/mL) in which the following parameters were measured: mortality of females (%), hatchability of eggs (%), and product efficiency (%). Larvae were assessed by the Larval Packet Test at concentrations ranging from 25.00 to 0.00004mg/mL. Lethal concentrations (LC) required for killing 50 and 99.9% of adult females and larvae were determined using Probit analysis. LC50 and LC99.9 of EO were 0.06 and 24.60mg/mL and 1,208.80 and 2,538mg/mL for larvae and adult females, respectively. Action of the EO in the free-living cycle of R. (B.) microplus larvae was another parameter assessed. To this end, the larvae were deposited in pots containing Brachiaria decumbens and, after migration to the leaf apex, a solution containing LC99.9 (24.60mg/mL) of the EO was sprayed. After 24h, 72.25% of the larvae had died, indicating stability of the EO when subjected to uncontrolled temperature and humidity conditions. The mechanism of action through which the EO killed the larvae and adult females was investigated by the Bioautographic Method, which showed inhibition of 3.15mg/mL of the EO on the acetylcholinesterase (AChE) enzyme. The results found in the present experiment indicate that E. pyriformis essential oil is an alternative in the control of southern cattle tick in the larval (parasitic) and free-living cycle (non-parasitic) stages under field conditions.

19 Art. 20 GG: Democracy

2019 ◽  
Author(s):  
Bumke Christian ◽  
Voßkuhle Andreas
Keyword(s):  
Public Information ◽  
Voting Rights ◽  
Fundamental Rights ◽  
Constitutional Court ◽  
Political Will ◽  
Information Campaigns ◽  
The People ◽  
State Authority ◽  
Federal Constitutional ◽  
District Assemblies

This chapter discusses the democracy principle as articulated in Art. 20 of the Grundgesetz (GG). Art. 20 para. 2 GG defines democracy in this manner: ‘All state authority is derived from the people. It shall be exercised by the people’. GG associates the concept of democracy with the concept of the state. Although the Federal Constitutional Court has avoided any reference to the principle of democracy, it has interpreted some fundamental rights in light of the principle. The chapter first considers the Court's jurisprudence regarding political will formation in a representative democracy, focussing on cases dealing with voting rights of foreigners, elections to district assemblies, popular referendum, and public-information campaigns. It then examines cases relating to exercise of state authority, with emphasis on the position of Parliament in relation to other branches of government, forms of democratic legitimation, and functional self-government.

scholarly journals Affecting migration: Public information campaigns and the intimate spatialities of border enforcement

2019 ◽  
Vol 38 (7-8) ◽  
pp. 1198-1215 ◽  
Author(s):  
Jill M Williams
Keyword(s):  
Decision Making ◽  
Soft Power ◽  
Public Information ◽  
Border Enforcement ◽  
Gender Ideologies ◽  
Information Campaigns ◽  
Feminist Geopolitics ◽  
Hard Power ◽  
Power Strategies ◽  
Depth Interviews

A broad body of research has examined the shifting spatialities of contemporary border enforcement efforts, drawing particular attention to how border enforcement efforts increasingly take place away from the territorial edges of border enforcing states. However, existing research largely focuses on border enforcement efforts that mobilize strategies of militarization, securitization, and criminalization. In response, this paper draws on work in the fields of emotional and feminist geopolitics, to broaden understandings of the sites, modalities, and spatialities of border governance. Drawing on in-depth interviews, archival research, and discourse analysis, this paper examines public information campaigns launched by US border enforcement agencies between 1990 and 2012. In doing so, I show how these campaigns aim to affect migrant decision-making and reduce unauthorized migration by circulating strategically crafted messages and images into the intimate spaces of everyday life where potential migrants and their loved ones live and socialize. Unlike the hard power strategies of militarized borders and migrant criminalization, public information campaigns work as soft-power tools of governance that target the emotional registers of viewers and both respond to and counter particular gender ideologies. As this analysis suggests, understanding the full complexity of contemporary border governance requires that we broaden the scope of analysis beyond the hard power strategies of militarization, securitization, and criminalization to examine the softer side of border governance, a project that the insights of feminist political geography are particularly well suited for.

scholarly journals Malaria Outbreak Facilitated by Appearance of Vector-Breeding Sites after Heavy Rainfall and Inadequate Preventive Measures: Nwoya District, Northern Uganda, February–May 2018

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Godfrey Nsereko ◽  
Daniel Kadobera ◽  
Denis Okethwangu ◽  
Joyce Nguna ◽  
Damian Rutazaana ◽  
...  
Keyword(s):  
Heavy Rainfall ◽  
Case Control Study ◽  
Preventive Measures ◽  
Case Fatality ◽  
Case Control ◽  
Control Measures ◽  
Northern Uganda ◽  
Entire Study ◽  
Breeding Sites ◽  
Control Study

Background. Malaria is a leading cause of morbidity and mortality in Uganda. In April 2018, malaria cases surged in Nwoya District, Northern Uganda, exceeding expected limits and thereby requiring epidemic response. We investigated this outbreak to estimate its magnitude, identify exposure factors for transmission, and recommend evidence-based control measures. Methods. We defined a malaria case as onset of fever in a resident of Anaka subcounty, Koch Goma subcounty, and Nwoya Town Council, Nwoya District, with a positive rapid diagnostic test or microscopy for malaria from 1 February to 25 May 2018. We reviewed medical records in all health facilities of affected subcounties to find cases. In a case-control study, we compared exposure factors between case-persons and asymptomatic controls matched by age and village. We also conducted entomological assessments on vector density and behavior. Results. We identified 3,879 case-persons (attack rate [AR] = 6.5%) and two deaths (case-fatality rate = 5.2/10,000). Females (AR = 8.1%) were more affected than males (AR = 4.7%) (p<0.0001). Of all age groups, 5–18 years (AR = 8.4%) were most affected. Heavy rain started in early March 2018, and a propagated outbreak followed in the first week of April 2018. In the case-control study, 55% (59/107) of case-persons and 18% (19/107) of controls had stagnant water around households for several days following rainfall (ORM-H = 5.6, 95% CI = 3.0–11); 25% (27/107) of case-persons and 51% (55/107) of controls wore full extremity covering clothes during evening hours (ORM-H = 0.30, 95% CI = 0.20–0.60); 71% (76/107) of case-persons and 85% (91/107) of controls slept under a long-lasting insecticide-treated net (LLIN) 14 days before symptom onset (ORM-H = 0.43, 95% CI = 0.22–0.85); 37% (40/107) of case-persons and 52% (56/107) of controls had access to at least one LLIN per 2 household members (ORM-H = 0.54, 95% CI = 0.30–0.97). Entomological assessment indicated active breeding sites in the entire study area; Anopheles gambiae sensu lato species were the predominant vector. Conclusion. Increased vector-breeding sites after heavy rainfall and inadequate malaria preventive measures were found to have contributed to this outbreak. We recommended increasing coverage for LLINs and larviciding breeding sites in the area.

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