scholarly journals An evaluation of repellency and feeding inhibition of ethno-medicinal plants against major malaria vectors in southern Ethiopia

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Tekle Olbamo ◽  
Endashaw Esayas ◽  
Tizazu Gebre ◽  
Fekadu Massebo
Keyword(s):  
Medicinal Plants ◽  
Mosquito Control ◽  
Feeding Activity ◽  
Residual Effect ◽  
Malaria Vectors ◽  
Southern Ethiopia ◽  
Control Methods ◽  
Plant Materials ◽  
The Mean ◽  
The Impact

Abstract Background Plant-based mosquito control methods may use as a supplementary malaria vector control strategy. This study aimed to evaluate the effect of smoking ethno-medicinal plants on indoor density and feeding activity of malaria vectors at early hours of the night and its residual effect after midnight in southern Ethiopia. Methods Both field and tent trials were conducted to evaluate the impact of smoking Juniperus procera leaves, Eucalyptus globulus seeds and Olea europaea leaves in Kolla Shara Village from July 2016 to February 2017. For the field trial, five grass-thatched traditional huts (three for ethno-medicinal plants and two as control [only charcoal smoking and non-charcoal smoking]) were used. Indoor host-seeking mosquitoes were collected by CDC light traps. A Latin square design was employed to minimize the bias due to the variation in house location and different sampling nights. For the tent experiment, 25 3–5-day-old starved wild female Anopheles mosquitoes reared from the larvae were released into the tents where a calf was tethered at the mid-point of each tent. Results A total of 614 Anopheles mosquitoes belonging to 5 species were collected from 5 huts, of which 93.4% was An. arabiensis; O. europaea, E. globulus and J. procera reduced the indoor density of An. arabiensis, with the mean percentage drop of 80%, 73% and 70%, respectively. In the tent trial, smoking of these plants had significant knockdown effects and inhibited feeding on the calves (F = 383.5, DF = 3, P < 0.01). The mean knockdown effect due to O. europaea was relatively high (17.7 ± 0.54; 95% CI 16.8–18.6), while it was only 0.9 ± 0.1 (95% CI 0.29–1.52) in the control tents. All the test plants used in the tent trial caused significantly inhibited feeding activity of An. arabiensis on the host (F = 383.5, DF = 3, P < 0.01). About 94.5%, 89.5% and 86% of mosquitoes were unfed because of the smoking effect of O. europaea, E. globulus and J. procera, respectively, whereas only 19.5% were unfed in the control tent. Conclusions Smoking ethno-medicinal plant materials reduced indoor density of malaria vectors and inhibited feeding on calves inside the tents. Thus, plant-based mosquito control methods may play a vital role in reducing mosquito bites in the early hours of the night and thereby reduce residual malaria transmission.

scholarly journals Which indoor residual spraying insecticide best complements standard pyrethroid long-lasting insecticidal nets for improved control of pyrethroid resistant malaria vectors?

PLoS ONE ◽  
2021 ◽  
Vol 16 (1) ◽  
pp. e0245804
Author(s):  
Thomas Syme ◽  
Augustin Fongnikin ◽  
Damien Todjinou ◽  
Renaud Govoetchan ◽  
Martial Gbegbo ◽  
...  
Keyword(s):  
Vector Control ◽  
Mosquito Control ◽  
Indoor Residual Spraying ◽  
Residual Effect ◽  
Blood Feeding ◽  
Additive Effect ◽  
Malaria Vectors ◽  
Vector Population ◽  
Pirimiphos Methyl ◽  
The Impact

Background Where resources are available, non-pyrethroid IRS can be deployed to complement standard pyrethroid LLINs with the aim of achieving improved vector control and managing insecticide resistance. The impact of the combination may however depend on the type of IRS insecticide deployed. Studies comparing combinations of pyrethroid LLINs with different types of non-pyrethroid IRS products will be necessary for decision making. Methods The efficacy of combining a standard pyrethroid LLIN (DuraNet®) with IRS insecticides from three chemical classes (bendiocarb, chlorfenapyr and pirimiphos-methyl CS) was evaluated in an experimental hut trial against wild pyrethroid-resistant Anopheles gambiae s.l. in Cové, Benin. The combinations were also compared to each intervention alone. WHO cylinder and CDC bottle bioassays were performed to assess susceptibility of the local An. gambiae s.l. vector population at the Cové hut site to insecticides used in the combinations. Results Susceptibility bioassays revealed that the vector population at Cové, was resistant to pyrethroids (<20% mortality) but susceptible to carbamates, chlorfenapyr and organophosphates (≥98% mortality). Mortality of wild free-flying pyrethroid resistant An. gambiae s.l. entering the hut with the untreated net control (4%) did not differ significantly from DuraNet® alone (8%, p = 0.169). Pirimiphos-methyl CS IRS induced the highest mortality both on its own (85%) and in combination with DuraNet® (81%). Mortality with the DuraNet® + chlorfenapyr IRS combination was significantly higher than each intervention alone (46% vs. 33% and 8%, p<0.05) demonstrating an additive effect. The DuraNet® + bendiocarb IRS combination induced significantly lower mortality compared to the other combinations (32%, p<0.05). Blood-feeding inhibition was very low with the IRS treatments alone (3–5%) but increased significantly when they were combined with DuraNet® (61% - 71%, p<0.05). Blood-feeding rates in the combinations were similar to the net alone. Adding bendiocarb IRS to DuraNet® induced significantly lower levels of mosquito feeding compared to adding chlorfenapyr IRS (28% vs. 37%, p = 0.015). Conclusions Adding non-pyrethroid IRS to standard pyrethroid-only LLINs against a pyrethroid-resistant vector population which is susceptible to the IRS insecticide, can provide higher levels of vector mosquito control compared to the pyrethroid net alone or IRS alone. Adding pirimiphos-methyl CS IRS may provide substantial improvements in vector control while adding chlorfenapyr IRS can demonstrate an additive effect relative to both interventions alone. Adding bendiocarb IRS may show limited enhancements in vector control owing to its short residual effect.

scholarly journals Ethnoveterinary Practices of Medicinal Plants and Non-plant Remedies Used in Animal Health Management in Dawuro Zone, Southern Ethiopia

2020 ◽  
Author(s):  
Tegegn Dilbato Dinbiso ◽  
Tadele Tolesa Tolosa ◽  
Feyissa Deressa Begna
Keyword(s):  
Medicinal Plants ◽  
Indigenous Knowledge ◽  
Reproductive System ◽  
Local Community ◽  
Animal Health ◽  
Conservation Strategy ◽  
Southern Ethiopia ◽  
Ethnoveterinary Medicine ◽  
Plant Resources ◽  
Plant Materials

Abstract Background: Ethnoveterinary medicine is frequently used for treating various livestock diseases by many different ethnic groups in Ethiopia. To this end, the indigenous knowledge on medicinal plants and non-plant remedies has not been systematically documented and studied in the Dawuro zone. Therefore, a community based cross-sectional study design was conducted from November, 2017 to September, 2018 in order to identify and document medicinal plants and non-plant ethnoveterinary practices in Dawuro zone, Southern Ethiopia.Methods: Relevant ethnoveterinary data was collected from purposively selected 115 key informants using semi-structured questionnaire, focus group discussions, observations and field guided walk methods. The obtained data was analyzed using descriptive statistics, quantitative ethnobotanical methods and T-test and significantly test was set to p < 0.05. The plants claimed having medicinal value were collected and botanically identified.Results: The study revealed 103 plant species belong to 47 families and 11 non-plant remedies used to manage 36 different livestock ailments. Family Asteraceae accounted for 11.5% of the total species recorded. The majority of plants (56.2%) were harvested from wild habitat. Herbs (33.8%) were the main source of medicine followed by tree (30.6%). Leaves (43.6%) and roots (27.5%) were the main plant parts used while pounding was the major form in remedy preparation. The highest Informant Consensus Factor (0.83) value was scored for the diseases of reproductive system. Cyphostema sp., Calpurina aurea and Pentas schimperiana were showed the highest Fidelity Level (100%) to treat diseases of reproductive system, ectoparasites, and emaciation and bone broken as plant materials whereas Bear faeces, sharp hot iron or wire/knife, and salt were non-plant remedies used as treatment, respectively. Azadirachta indica was the most preferred species to treat blackleg and also with highest use-value (UVs = 0.25).Conclusion: The study revealed that the local community of the study areas was used with a rich of indigenous knowledge of ethnoveterinary medicinal plants. The loss of valuable medicinal plant resources of the area calls for urgent and coordinated actions to develop conservation strategy.

scholarly journals Bio-Efficacy of Commercially Available Residual Insecticides for the Control of Aedes aegypti in Mexico

2020 ◽  
Vol 36 (1) ◽  
pp. 16-21 ◽  
Author(s):  
S. Dzib-Florez ◽  
G. Ponce-García ◽  
A. Che-Mendoza ◽  
A. Medina-Barreiro ◽  
L. Gray ◽  
...  
Keyword(s):  
Aedes Aegypti ◽  
Mosquito Control ◽  
Indoor Residual Spraying ◽  
Residual Effect ◽  
Community Based ◽  
Surface Type ◽  
Residual Efficacy ◽  
The Mean

ABSTRACT Commercial aerosolized insecticides can be implemented as a community-based approach to targeted indoor residual spraying against Aedes aegypti, but their efficacy on pyrethroid-resistant mosquitoes has not yet been evaluated. Two commercial aerosolized products (H24 Poder Fulminante Ultra Eficaz®, carbamate, and Baygon Ultra Verde®, pyrethroid) were sprayed on common indoor surfaces e.g., cement, plywood, and cloth, and tested for their residual efficacy on susceptible and field-derived pyrethroid-resistant Ae. aegypti strains using the WHO cone bioassays. Overall, ≥80% 24-h mortality was observed for both products for at least 4 wk regardless of the mosquito strain or surface type used. H24 Poder Fulminante Ultra Eficaz showed the highest residual potency, sustaining &gt;80% mortality for 7-wk posttreatment regardless of mosquito strain and surface type. For Baygon Ultra Verde, the mean mortality of female Ae. aegypti remained &gt;80% for a shorter period (4–6 wk). Nonpyrethroid commercial aerosolized formulations can provide a lasting residual effect indoors compatible with the need for rapid and lasting mosquito control during outbreaks and may be suitable for community-based targeted indoor residual spraying.

scholarly journals Ethnoveterinary Practices of Medicinal Plants and Non-plant Remedies Used in Animal Health Management in Dawuro Zone, Southern Ethiopia

2021 ◽  
Author(s):  
Tegegn Dilbato Dinbiso ◽  
Tadele Tolesa Fulasa ◽  
Feyissa Deressa Begna
Keyword(s):  
Medicinal Plants ◽  
Indigenous Knowledge ◽  
Reproductive System ◽  
Health Management ◽  
Animal Health ◽  
Conservation Strategies ◽  
Southern Ethiopia ◽  
Common Salt ◽  
Plant Materials ◽  
Significant Difference

Abstract Background: Ethnoveterinary medicine is frequently used for treating various livestock diseases by many different ethnic groups in Ethiopia. To this end, the indigenous knowledge of medicinal plants and non-plant remedies has not been systematically documented and studied in the Dawuro zone. Therefore, a community based cross-sectional study design was conducted from November, 2017 to September, 2018 in order to identify and document medicinal plants and non-plant remedies used in animal health management.Methods: Relevant information on ethnoveterinary practice was collected from purposively selected 115 key informants using semi-structured questionnaire, focus group discussions, observations and field guided walk methods. The obtained data were analyzed using descriptive statistics, quantitative ethnobotanical methods and t-test and significantly test was set to p< 0.05. The plants claimed having medicinal value were collected and botanically identified.Results: The study revealed 103 plant species belong to 47 families and 11 non-plant remedies used to manage 36 different livestock ailments. Family Asteraceae accounted for 11.5% of the total species recorded. The majority of plants (56.2%) were harvested from wild habitat. Herbs (33.8%) were the main source of medicine followed by tree (30.6%). Leaves (43.6%) and roots (27.5%) were the main plant parts used while pounding was the major form in remedy preparation. The highest Informant Consensus Factor (0.83) value was scored for the disease of the reproductive system. Significant difference (P<0.05) was observed in average number of therapeutic plants reported by illiterate higher than literate groups. Cyphostemma flavicans (Baker) Desc. and Pentas schimperi were showed the highest Fidelity Level (100%) to treat disease of the reproductive system, and emaciation and bone fracture as plant materials whereas Bear faeces, sharp hot iron or wire/knife, and common salt were non-plant remedies used in the study area.Conclusion: The study revealed that the local community of in the study areas was used with a rich of indigenous knowledge of ethnoveterinary medicinal plants. The loss of valuable medicinal plant resources of the area calls for urgent and coordinated actions to develop conservation strategies.

Asteroid and Comet Impact Speeds upon Mars: Significance for Panspermia and the Supply of Organics

1997 ◽  
Vol 161 ◽  
pp. 197-201 ◽  
Author(s):  
Duncan Steel
Keyword(s):  
Probability Distributions ◽  
Regions Of Interest ◽  
Significant Fraction ◽  
Organic Chemicals ◽  
Impact Speed ◽  
The Mean ◽  
The Impact

AbstractWhilst lithopanspermia depends upon massive impacts occurring at a speed above some limit, the intact delivery of organic chemicals or other volatiles to a planet requires the impact speed to be below some other limit such that a significant fraction of that material escapes destruction. Thus the two opposite ends of the impact speed distributions are the regions of interest in the bioastronomical context, whereas much modelling work on impacts delivers, or makes use of, only the mean speed. Here the probability distributions of impact speeds upon Mars are calculated for (i) the orbital distribution of known asteroids; and (ii) the expected distribution of near-parabolic cometary orbits. It is found that cometary impacts are far more likely to eject rocks from Mars (over 99 percent of the cometary impacts are at speeds above 20 km/sec, but at most 5 percent of the asteroidal impacts); paradoxically, the objects impacting at speeds low enough to make organic/volatile survival possible (the asteroids) are those which are depleted in such species.

Sound Production Treatment for Acquired Apraxia of Speech: An Examination of Dosage in Relation to Probe Performance

2020 ◽  
pp. 1-16
Author(s):  
Julie L. Wambaugh ◽  
Lydia Kallhoff ◽  
Christina Nessler
Keyword(s):  
Retrospective Analysis ◽  
Sound Production ◽  
Apraxia Of Speech ◽  
Practice Schedule ◽  
Practice Schedules ◽  
Baseline Performance ◽  
The Mean ◽  
Number Of Treatment ◽  
The Impact

Purpose This study was designed to examine the association of dosage and effects of Sound Production Treatment (SPT) for acquired apraxia of speech. Method Treatment logs and probe data from 20 speakers with apraxia of speech and aphasia were submitted to a retrospective analysis. The number of treatment sessions and teaching episodes was examined relative to (a) change in articulation accuracy above baseline performance, (b) mastery of production, and (c) maintenance. The impact of practice schedule (SPT-Blocked vs. SPT-Random) was also examined. Results The average number of treatment sessions conducted prior to change was 5.4 for SPT-Blocked and 3.9 for SPT-Random. The mean number of teaching episodes preceding change was 334 for SPT-Blocked and 179 for SPT-Random. Mastery occurred within an average of 13.7 sessions (1,252 teaching episodes) and 12.4 sessions (1,082 teaching episodes) for SPT-Blocked and SPT-Random, respectively. Comparisons of dosage metric values across practice schedules did not reveal substantial differences. Significant negative correlations were found between follow-up probe performance and the dosage metrics. Conclusions Only a few treatment sessions were needed to achieve initial positive changes in articulation, with mastery occurring within 12–14 sessions for the majority of participants. Earlier occurrence of change or mastery was associated with better follow-up performance. Supplemental Material https://doi.org/10.23641/asha.12592190

Impact of changing rainfall conditions on surface and groundwater resources in an experimental watershed in Greece

2013 ◽  
Vol 12 (2) ◽  
pp. 119-125
Keyword(s):  
Groundwater Resources ◽  
Annual Runoff ◽  
Annual Rainfall ◽  
Rainfall Regime ◽  
Winter Rainfall ◽  
Rainfall Depth ◽  
Rainfall Volume ◽  
The Mean ◽  
Groundwater Reserves ◽  
The Impact

The present study concerns the impact of a change in the rainfall regime on surface and groundwater resources in an experimental watershed. The research is conducted in a gauged mountainous watershed (15.18 km2) that is located on the eastern side of Penteli Mountain, in the prefecture of Attica, Greece and the study period concerns the years from 2003 to 2008. The decrease in the annual rainfall depth during the last two hydrological years 2006-2007, 2007-2008 is 10% and 35%, respectively, in relation to the average of the previous years. In addition, the monthly distribution of rainfall is characterized by a distinct decrease in winter rainfall volume. The field measurements show that this change in rainfall conditions has a direct impact on the surface runoff of the watershed, as well as on the groundwater reserves. The mean annual runoff in the last two hydrological years has decreased by 56% and 75% in relation to the average of the previous years. Moreover, the groundwater level follows a declining trend and has dropped significantly in the last two years.

Pemanfaatan Tumbuhan Obat Tradisional oleh Etnis Sangihe di Kepulauan Sangihe Bagian Selatan, Sulawesi Utara (The Usage of Traditional Medicinal Plants by Sangihe Ethnic in the Southern Sangihe Islands, North Sulawesi)

2018 ◽  
Vol 8 (2) ◽  
pp. 45
Author(s):  
Chrisye Yustitia Pelokang ◽  
Roni Koneri ◽  
Deidy Katili
Keyword(s):  
Medicinal Plants ◽  
Traditional Medicine ◽  
Plant Species ◽  
Structured Interviews ◽  
Active Components ◽  
Plant Materials ◽  
Medical Practitioners ◽  
North Sulawesi ◽  
Traditional Medicinal Plants ◽  
Plant Families

Abstrak Tumbuhan obat merupakan tumbuhan yang menghasilkan satu atau lebih komponen aktif yang dipercaya oleh penduduk berkhasiat obat sehingga dimanfaatkan dalam pengobatan tradisional. Penelitian ini bertujuan untuk mengidentifikasi dan mengkaji spesies tumbuhan yang digunakan sebagai obat tradisional oleh Etnis Sangihe di Kepulauan Sangihe bagian Selatan, Sulawesi Utara. Pengambilan data dilakukan melalui wawancara terstruktur  yang diajukan kepada pengobat tradisional. Hasil penelitian menunjukkan adanya 38 spesies dari 25 famili tumbuhan yang dimanfaatkan sebagai tumbuhan obat oleh Etnis Sangihe bagian Selatan. Herba merupakan habitus tumbuhan yang banyak dimanfaatkan untuk bahan pengobatan. Bagian tumbuhan yang paling banyak digunakan sebagai obat yaitu daun. Cara pengolahan yang paling banyak digunakan adalah direbus. Jenis penyakit yang dapat diobati dengan tumbuhan obat sebanyak 22 jenis penyakit. Kata kunci: tumbuhan obat, obat tradisional, habitus, Kepulauan Sangihe Bagian Selatan Abstract             Medicinal plants are plants that produce one or more active components that are believed by local people as medicinal plants for traditional medicine practices. This study aimed to identify and to assess the plant species that used as traditional medicine by the Sangihe Ethnic in the Southern Sangihe Islands, North Sulawesi. Data collection was conducted by structured interviews to the indigenous medical practitioners. The results showed that 38 plant species from 25 plant families were used as medicinal plants by the Southern Sangihe Ethnic people. Herbs were plant habitus that were widely used for medicinal ingredients. The leaves were widely used as medicinal plant materials. Boiling was the most processing method for preparing medicinal herbs. There were 22 types of diseases that could be treated using medicinal plants. Keywords: medicinal plants, traditional medicine, habitus, Southern Sangihe Islands

(Preprint)

2018 ◽  
Author(s):  
Natalia Banasik ◽  
Dariusz Jemielniak ◽  
Wojciech P?dzich
Keyword(s):  
Medical Condition ◽  
Extended Period ◽  
Well Being ◽  
Marginal Effect ◽  
Life Duration ◽  
Significant Difference ◽  
The Mean ◽  
Academic Teachers ◽  
Length Of Life ◽  
The Impact

BACKGROUND There have been mixed results of the studies checking whether prayers do actually extend the life duration of the people prayed for. Most studies on the topic included a small number of prayers and most of them focused on people already struggling with a medical condition. Intercessory prayer’s influence on health is of scholarly interest, yet it is unclear if its effect may be dependent on the number of prayers for a named individual received per annum. OBJECTIVE We sought to examine if there is a noticeable increased longevity effect of intercessory prayer for a named individual’s well-being, if he receives a very high number of prayers per annum for an extended period. METHODS We retrieved and conducted a statistical analysis of the data about the length of life for 857 Roman Catholic bishops, 500 Catholic priests, and 3038 male academics from the US, France, Italy, Poland, Brazil, and Mexico. We obtained information for these individuals who died between 1988 and 2018 from Wikidata, and conducted an observational cohort study. Bishops were chosen for the study, as they receive millions of individual prayers for well being, according to conservative estimates. RESULTS There was a main effect for occupation F(2, 4391) = 4.07, p = .017, ηp 2 = .002, with pairwise comparisons indicating significant differences between the mean life duration of bishops (M=30489) and of priests (M=29894), but none between the academic teachers (M=30147) and either of the other groups. A comparison analysis between bishops from the largest and the smallest dioceses showed no significant difference t(67.31)=1.61, p = .11. Our main outcome measure is covariance of the mean length of life in each of the categories: bishops, priests, academic teachers, controlled for nationality. CONCLUSIONS The first analysis proved that bishops live longer than priests, but due to a marginal effect size this result should be treated with caution. No difference was found between the mean length of life of bishops from the largest and the smallest dioceses. We found no difference between bishops and male academics. These results show that the impact of intercessory prayers on longevity is not observable.

scholarly journals Mean Empirical Likelihood Inference for Response Mean with Data Missing at Random

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Hanji He ◽  
Guangming Deng
Keyword(s):  
Empirical Likelihood ◽  
Missing At Random ◽  
Confidence Regions ◽  
Likelihood Inference ◽  
High Dimensional ◽  
Finite Sample ◽  
The Mean ◽  
Data Missing ◽  
Consistency And Asymptotic Normality ◽  
The Impact

We extend the mean empirical likelihood inference for response mean with data missing at random. The empirical likelihood ratio confidence regions are poor when the response is missing at random, especially when the covariate is high-dimensional and the sample size is small. Hence, we develop three bias-corrected mean empirical likelihood approaches to obtain efficient inference for response mean. As to three bias-corrected estimating equations, we get a new set by producing a pairwise-mean dataset. The method can increase the size of the sample for estimation and reduce the impact of the dimensional curse. Consistency and asymptotic normality of the maximum mean empirical likelihood estimators are established. The finite sample performance of the proposed estimators is presented through simulation, and an application to the Boston Housing dataset is shown.

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