scholarly journals Seasonal and Geographical Variation of Dengue Vectors in Narathiwat, South Thailand

Author(s):  
Ornanong Boonklong ◽  
Adisak Bhumiratana

Using GIS-based land use map for the urban-rural division (the relative ratio of population density adjusted to relativelyAedes-infested land area), we demonstrated significant independent observations of seasonal and geographical variation ofAedes aegyptiandAedes albopictusvectors between Muang Narathiwat district (urban setting) and neighbor districts (rural setting) of Narathiwat, Southern Thailand, based on binomial distribution ofAedesvectors in water-holding containers (water storage containers, discarded receptacles, miscellaneous containers, and natural containers). The distribution ofAedesvectors was influenced seasonally by breeding outdoors rather than indoors in all 4 containers. Accordingly, both urban and rural settings elicited significantly seasonal (wet versus dry) distributions ofAe. aegyptilarvae observed in water storage containers (P=0.001andP=0.002) and natural containers (P=0.016andP=0.015), whereas, in rural setting, the significant difference was observed in discarded receptacles (P=0.028) and miscellaneous containers (P<0.001). Seasonal distribution ofAe. albopictuslarvae in any containers in urban setting was not remarkably noticed, whereas, in rural setting, the significant difference was observed in water storage containers (P=0.007) and discarded receptacles (P<0.001). Moreover, the distributions of percentages of container index forAedes-infested households in dry season were significantly lower than that in other wet seasons,P=0.034for urban setting andP=0.001for rural setting. Findings suggest that seasonal and geographical variation ofAedesvectors affect the infestation in those containers in human inhabitations and surroundings.

2008 ◽  
Vol 74 (11) ◽  
pp. 1083-1087 ◽  
Author(s):  
Richard P. Gonzalez ◽  
Glenn R. Cummings ◽  
Herbert A. Phelan ◽  
Madhuri S. Mulekar ◽  
Charles B. Rodning

Fatality rates from rural vehicular trauma are almost double those found in urban settings. Increased emergency medical services (EMS) prehospital time has been implicated as one of the causative factors for higher rural fatality rates. Advanced Trauma Life Support guidelines suggest scene time should not be extended to insert an intravenous catheter (IV). The purpose of this study was to assess the association between intravenous line placement and motor vehicle crash (MVC) scene time in rural and urban settings. An imputational methodology using the National Highway Traffic Safety Administration Crash Outcome Data Evaluation System permitted linkage of data from police motor vehicle crash and EMS records. Intergraph GeoMedia software permitted this linked data to be plotted on digital maps for segregation into rural and urban groups. MVCs were defined as rural or urban by location of the accident using the U.S. Bureau of Census Criteria. Linked data were analyzed to assess for EMS time on-scene, on-scene IV insertion, on-scene IV insertion attempts, and patient mortality. Over a 2-year period from January 2001 through December 2002, data were collected from Alabama EMS patient care reports (PCRs) and police crash reports. A total of 45,763 police crash reports were linked to EMS PCRs. Of these linked crash records, 34,341 (75%) and 11,422 (25%) were injured in rural and urban settings, respectively. Six hundred eleven (1.78%) mortalities occurred in rural settings and 103 (0.90%) in urban settings (P < 0.005). There were 6,273 (18.3%) on-scene IV insertions in the rural setting and 1,290 (11.3%) in the urban setting (P < 0.005). Mean EMS time on-scene when single IV insertion attempts occurred was 16.9 minutes in the rural setting and 14.5 minutes in the urban setting (P < 0.0001). When two attempts of on-scene IV insertion were made, mean EMS time on-scene in the rural setting (n = 891 [2.6%]) was 18.4 minutes and 15.7 minutes in the urban setting (n = 142 [1.2%; P < 0.005). Excluding dead on-scene patients, mean EMS time on-scene when mortalities occurred in rural and urban settings was 18.9 minutes and 10.8 minutes, respectively (P < 0.005). On-scene IV insertion occurred with significantly greater frequency in rural than urban settings. This incurs greater EMS time on-scene and prehospital time that may be associated with increased vehicular fatality rates in rural settings.


2021 ◽  
Vol 4 (2) ◽  
pp. 59-70
Author(s):  
Juliana O.P. ◽  
Adenike B.A.

Microorganisms grow and form biofilms on surfaces of equipment employed in food processing. These biofilms are considered as the major sources of contamination in the food industry. The study determined the bacterial load and composition on surfaces of equipment and utensils employed in tigernut drink production, from a vendor with a production unit located in an open market in Yenagoa, Nigeria. Swabs were taken from different sampling points made of varying materials—the grinding machine (metal), the collection bowls, water storage containers (thick plastic) and retail bottles (light plastic). These were analysed for total heterotrophic bacterial counts (THBC) and bacterial diversity using standard procedures. The THBC of water used in the drink production was also determined. The THBC of the sampling points ranged from log 3.28±0.06 cfu/cm2 to log 5.18±0.05 cfu/cm2, and log 5.13±0.07 cfu/ml for the water sample. The grinder and water recorded higher bacterial load with a statistically significant difference (P<0.05). The retail bottles had the least bacterial count. Shigella spp. were the most isolated (27.451%), then Salmonella spp. (21.568%) and E. coli (15.686%). Streptococcus spp., Staphylococcus spp. and Vibrio spp. were the least isolated (11.765% each). Shigella and Salmonella species occurred at all sampling points but not on the retail bottles. E. coli was present in the water collection bowls and retail bottles while Streptococcus, Staphylococcus and Vibrio were found only in the retail bottles. On diversity, four bacterial genera (39.216%) were isolated from the retail bottles, three (25.490%) from the water storage containers and two (17.647%) from the grinder and collection bowls. The microorganisms possibly had preference for attachment to the surfaces based on the material makeup and nutrient availability. Their occurrence and high numbers reflect the low level of hygiene employed prior to drink production. This could be of public health concern.


2019 ◽  
Vol 10 (1) ◽  
pp. 220
Author(s):  
Muhammad Afzaal ◽  
Kanglong Liu ◽  
Baoqin Wu ◽  
Rahiba Sayyida ◽  
Swaleha Bano Naqvi

This study analyzes the differences between the academic writing of undergraduate students belonging to two Pakistani universities, one located in an urban setting and the other in a rural locale, in an attempt not only to identify why these differences may arise but also how such learners may be encouraged to more readily adopt academic writing techniques in their theses. Data comprises the abstract and discussion sections of undergraduate students&rsquo; dissertations. The study uses Swales&rsquo; CARS model to analyze the academic writing proficiency demonstrated in the selected data. The study finds that the occurrences of a particular move were more frequent in the dissertations of the rural area students. In contrast, the instantiation of hedges was significant in the dissertations of learners from the urban area university. These observed differences confirm the perception that in terms of academic writing &ldquo;quality&rdquo;, the universities in rural settings in Pakistan are not sufficiently competitive with peer institutions in urban settings. The study further reveals that dissertations from rural setting universities reflect poor use of rhetorical moves associated with good academic writing, while in line with Swales&rsquo; CARS model, students from the urban university show significant linear patterns and accuracy in their academic writing.


2021 ◽  
Author(s):  
U. Harikrishnan ◽  
Grace Lalhlupuii Sailo

Abstract Self-reported studies alone cannot be used to deduce the significance of adolescent problems. Therefore, the current study focuses on parents’ and class teachers’ perspectives of school-going adolescents’ emotional and behavioural problems. The objectives are to apprehend the prevalence of adolescent problems, comparisons on gender, school-area; and its association with socio-demographic details. A cross-sectional questionnaire-based study was conducted among 19 schools from government-private and rural-urban schools across Kollam District, Kerala. Malayalam/English version of the Strength and Difficulties Questionnaire (SDQ) was administered among a sample of 600 parents and 60 class teachers of school-going adolescents. Gender correlation with parents’ report found emotional problems (P<0.01), conduct problems (P<0.01), hyperactivity (P<0.001), peer problems (P<0.001) whereas in teachers’ report found relationship with emotional problems (P<0.05) and hyperactivity (P<0.001). Multivariate test results reveal that there is a statistically significant difference in emotional and behavioural problems of school-going adolescents based on school area (government-urban, government-rural, private-urban and private-rural). Multiple linear regression analysis on parents reports is significantly predicted with gender (P<0.01), urban-rural settings (P<0.001) and socioeconomic status (P<0.01). Teachers’ report has significantly been predicted with urban-rural settings (P<0.01) and socioeconomic status (P<0.001). Parents’ reports revealed a less overall prevalence of emotional and behavioural problems than teachers’ reports. Female adolescents tend to have more emotional problems and males were found to be more hyperactive. A significant difference was found with the school-area settings and significant association with socio-demographic details of adolescents. More attention is needed for the protection of adolescents’ mental health and fills mental health gaps in services.


2009 ◽  
Vol 12 (11) ◽  
pp. 2051-2059 ◽  
Author(s):  
Nathalie Pouliot ◽  
Anne-Marie Hamelin

AbstractObjectiveThe present study explores the spatial distribution and in-store availability of fresh fruits and vegetables from a socio-environmental perspective in terms of the type of food store, level of deprivation and the setting (urban/rural) where the food outlets are located.DesignSeven types of fresh fruit and vegetable stores (FVS) were identified then visited in six districts (urban setting) and seven communities (rural setting). The quantity and diversity of fresh fruits and vegetables (F&V) were also assessed.SettingQuébec City, Canada.ResultsThe FVS spatial distribution showed differences between the two settings, with accessibility to supermarkets being more limited in rural settings. The quantity and diversity of fresh F&V in-store availability were associated with the type of FVS, but not with setting or its level of deprivation. Greengrocers and supermarkets offered a greater quantity and diversity of fresh F&V than the other FVS.ConclusionsThe results suggest that inequalities in physical access to fresh F&V across the region could have an impact on public health planning considering that supermarkets, which are one of the excellent sources of F&V, are less prevalent in rural settings.


2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Atem Bethel Ajong ◽  
Nkengazem Nerry Tankala ◽  
Martin Ndinakie Yakum ◽  
Ikei Solange Azenoi ◽  
Bruno Kenfack

Abstract Background Menarche is an expected event that occurs during the development of every normal young girl. We designed this study to evaluate the knowledge of young school girls on puberty, menarche, and menstruation, and to update data on the age at menarche in a rural and urban setting in Cameroon. Methods We conducted a cross-sectional survey from February to March 2017, targeting female students aged 9 to 16 years in Yaoundé (urban) and Bamougoum (rural). Participants were included using a randomised cluster sampling and data collected using an auto-administrable questionnaire. Student t-test or the Kruskal-Wallis test was used to compare means, and the odds ratio used as the measure of association between age at menarche and selected covariates. Results 1157 participants were included in the study; 49.3% from an urban setting and 50.7% from a rural setting. Regarding the knowledge of our participants on puberty, menarche, and menstruation, 67.20% of rural participants had good knowledge, whereas only 46.00% had good knowledge in the urban setting. Mean age at menarche was 12.76 ± 1.33 years, with the mean age at menarche in the urban setting of 12.48 ± 1.12 years and the rural setting of 13.03 ± 1.46 years. Mean age at menarche was significantly lower in participants aged below 14 years (p-value = 0.000), those with both parents alive (p-value = 0.0461), those whose fathers had skilled occupations (p-value = 0.005), those of urban resident (p-value = 0.000), and those who watched TV everyday (p-value = 0.030). Urban residence and age below 14 years were significantly associated with an earlier onset of menarche. Conclusion Rural participants had better knowledge of puberty, menarche, and the menstrual cycle than their counterparts in the urban setting. The mean age at menarche over the last two decades has dropped by 7.4 and 4.2 months per decade in urban and rural Cameroon respectively. Mean age at menarche varies significantly with age group, urban/rural residence, state of both parents (both alive/at least one dead), occupation of the father, and frequency of watching TV. Age and urban/rural residence are associated with age at onset of menarche. The continually declining age at menarche is an alarm for future early menarche-linked morbidities.


2020 ◽  
Vol 14 (12) ◽  
pp. e0008949
Author(s):  
Fatma Saleh ◽  
Jovin Kitau ◽  
Flemming Konradsen ◽  
Ayubo Kampango ◽  
Rahibu Abassi ◽  
...  

Background In Zanzibar, little is known about the arboviral disease vector Aedes aegypti in terms of abundance, spatio-temporal distribution of its larval habitats or factors associated with its proliferation. Effective control of the vector requires knowledge on ecology and habitat characteristics and is currently the only available option for reducing the risk of arboviral epidemics in the island nation of Zanzibar. Methodology We conducted entomological surveys in households and surrounding compounds from February to May 2018 in the urban (Mwembemakumbi and Chumbuni) and rural (Chuini and Kama) Shehias (lowest government administrative unit) situated in the Urban-West region of Unguja island, Zanzibar. Larvae and pupae were collected, transported to the insectary, reared to adult, and identified to species level. Characteristics and types of water containers were also recorded on site. Generalized linear mixed models with binomial and negative binomial distributions were applied to determine factors associated with presence of Ae. aegypti immatures (i.e. both larvae and pupae) or pupae, alone and significant predictors of the abundance of immature Ae. aegypti or pupae, respectively. Results The survey provided evidence of widespread presence and abundance of Ae. aegypti mosquitoes in both urban and rural settings of Unguja Island. Interestingly, rural setting had higher numbers of infested containers, all immatures, and pupae than urban setting. Likewise, higher House and Breteau indices were recorded in rural compared to the urban setting. There was no statistically significant difference in Stegomyia indices between seasons across settings. Plastics, metal containers and car tires were identified as the most productive habitats which collectively produced over 90% of all Ae. aegypti pupae. Water storage, sun exposure, vegetation, and organic matter were significant predictors of the abundance of immature Ae. aegypti. Conclusions Widespread presence and abundance of Ae. aegypti were found in rural and urban areas of Unguja, the main island of Zanzibar. Information on productive habitats and predictors of colonization of water containers are important for the development of a routine Aedes surveillance system and targeted control interventions in Zanzibar and similar settings.


Challenges ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 16
Author(s):  
Farshad Amiraslani

The recent COVID-19 pandemic has revealed flaws in rural settings where most people live without the necessary tools, income, and knowledge to tackle such unprecedented global challenges. Here, I argue that despite the research studies conducted on rural areas, these have not solved rising rural issues, notably poverty and illiteracy. I propound a global institute to be formed by governments that provides a platform for empowering rural communities through better training, skills, and competencies. Such global endeavour will ensure the remaining rural communities withstand future pandemics if they occur.


2021 ◽  
Author(s):  
William Rickard ◽  
Marcos Paradelo Perez ◽  
Aurelie Bacq-Labreuil ◽  
Andy Neal ◽  
Xiaoxian Zhang ◽  
...  

&lt;p&gt;Soil organic matter is associated with important biological and physical functions. There are many theories to interpret this association, as yet there is not a fully developed understanding linking soil properties to nutritional management in arable systems.&lt;/p&gt;&lt;p&gt;We used X-ray computed tomography to analyse soil structure at the core and aggregate scale on the Broadbalk long term experiment (Hertfordshire, England). Here we present results of the treatments that have been under continuous wheat for 175 years. Corresponding to treatments that the only difference between the treatments is the nutrient management regime, with the exception of the baseline, or &amp;#8216;wilderness&amp;#8217; treatment in which the plot was left unmanaged and has returned to mature woodland since 1882. The other nutrient treatments correspond to inorganic fertiliser addition with and without phosphorus, farmyard manure, and no added nutrient.&lt;/p&gt;&lt;p&gt;At core scale (40 &amp;#181;m resolution) we capture macro pore structures that are responsible for convective flow, while the aggregate scale images (1.5 &amp;#181;m resolution) include structures responsible for retention of water by capillary forces.&amp;#160; Therefore, a comparison of images taken at the two resolutions 1.5 &amp;#181;m and 40 &amp;#181;m provides information on how soil partitions between drainage and storage of water, and therefore on the air water balance under different environmental contexts.&lt;/p&gt;&lt;p&gt;The results are presented as a state-space plot of simulated permeability vs. porosity for each treatment. We find that nutrient management resulted in two distinct states at aggregate scale corresponding to water storage potential. Inorganic nutrient management resulted in structures of lower porosity and lower simulated permeability. There was no significant difference between each treatment, or between these treatments and the treatment with no nutrient addition. By comparison, the wilderness and manure treatments had higher porosity and higher permeability, with no significant difference between them.&lt;/p&gt;&lt;p&gt;At core scale, the results are slightly different. Again, the inorganic nutrient management treatments had lower porosity and simulated permeability, with no significant difference between them, and between them and the treatment with no nutrient addition. However, the manure treatment had a significantly lower porosity and permeability than the wilderness treatment. We conclude that long-term cultivation with organic nutrient management results in a similar capacity for water storage and transport to roots than a wilderness control, but that long-term management using a purely inorganic nutrient regime results in a smaller capacity for water storage and a lower transport rate to roots. Organic inputs, roots and plant detritus ploughed into the soil after harvest had no significant impact. Infiltration potential is highest in the wilderness control, lower for the manure treatment, and lowest for the inorganic nutrient management treatment. Again, inputs of organic nutrients from plants had no significant impact. We interpret these findings in terms of a previously hypothesised self-organising feedback loop between microbial activity and soil structure.&lt;/p&gt;


2018 ◽  
Vol 11 (3) ◽  
pp. 459-469 ◽  
Author(s):  
T.C. Murashiki ◽  
C. Chidewe ◽  
M.A. Benhura ◽  
L.R. Manema ◽  
B.M. Mvumi ◽  
...  

There is limited empirical evidence on the efficacy of hermetic storage containers in reducing mycotoxin occurrence in stored maize grain under smallholder field conditions. Levels of aflatoxin B1 (AFB1) and fumonisin B1 (FB1) in maize samples collected from hermetic metal silos (148), hermetic grain bags (121) and conventional stores (179) during 2015 and 2016 storage seasons in two rural districts of Zimbabwe were assessed. AFB1 was determined using high performance liquid chromatography with post-column derivatisation and fluorescence detection, whilst FB1 was determined using direct competitive ELISA. All maize samples collected at harvest in 2015 and 2016 seasons contained FB1 at levels ranging from 10 to 462 μg/kg and 13 to 537 μg/kg, respectively. Use of hermetic containers did not seem to have any effect on the development of FB1 in stored maize grain, as there was no significant difference (P>0.05) in the increase of FB1 contamination in hermetic and conventional stores. Prior to storage, the levels of AFB1 in the maize ranged from below the limit of quantitation (LOQ) to 25.0 μg/kg, whilst levels during storage ranged from <LOQ to 8.60 μg/kg in hermetic silos, <LOQ to 8.37 μg/kg in hermetic bags and <LOQ to 791 μg/kg in conventional stores over the two storage seasons. The occurrence of AFB1 in maize stored in hermetic containers, was significantly (P<0.05) lower than that in conventional stores. Hermetic containers were more effective than conventional stores in limiting contamination of maize with AFB1 and subsequent human exposure to these toxins. Therefore, hermetic storage containers are recommended to smallholder maize producers for safe and effective limitation of AFB1 contamination during storage and hence reduce exposure among consumers.


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