Presence Of Aedes Research Articles

Relationship of Water Media Characteristics (pH, Temperature, TDS) to Density of Aedes sp Mosquito Flars in Karanggeneng Village, Lamongan District

DHF (Dengue hemorrhagic fever) is a tropical endemic disease in Indonesia with a fluctuating trend in Lamongan. The main factor under control is the larval breeding habitat. This study aimed to determine the relationship between the characteristics of the water medium and the density of Aedes sp. mosquito larvae in Karanggeneng Village, Lamongan Regency. We conducted this quantitative study using a cross-sectional observational method on a sample of 80 houses in Karanggeneng Village, employing a straightforward random sampling technique. We recorded the data collection in the observation sheet and analyzed it with a chi-square test. The results showed that 37 houses were positive for Aedes sp. larvae based on HI (DF = 6), CI (DF = 6), and BI (DF = 7), so Karanggeneng Village has a high mosquito larval density. There is a significant relationship between water media and the presence of Aedes sp. mosquito larvae. The relationship between pH (p-value = 0.000), temperature (p-value = 0.000), and TDS (p-value = 0.000) is significant. We recommend regularly draining the water container weekly to prevent mosquito larvae from using it as a habitat.

FAKTOR- FAKTOR YANG BERHUBUNGAN DENGAN KEBERADAAN JENTIK NYAMUK AEDES AEGYPTI

The existence of Aedes aegypti larvae is evidence of the discovery of a population of Aedes aegypti mosquitoes that influence the occurrence of Dengue Hemorrhagic Fever. The larvae-free rate in Labuh Baru Timur Subdistrict was found to be 85%, which shows that it has not reached the national standard above or equal to 95%. The research aimed to determine the factors related to the presence of Aedes aegypti mosquito larvae in Labuh Baru Timur Subdistrict, the working area of ​​the Payung Sekaki Community Health Center, Pekanbaru City in 2023. This research method was quantitative using Observational Analytical with a cross-sectional design. The research was carried out in February - July 2023. The sampling technique was quota sampling of 100 heads of families. The data analysis used is univariate and bivariate. The results of the research showed that there was a relationship between knowledge, attitudes, eradicating mosquito nests, the color of the water reservoir, the location of the water reservoir, and the role of larva monitoring cadres (Jumantik) with the presence of Aedes aegypti mosquito larvae. It is hoped that the Payung Sekaki Community Health Center can provide KIE (Communication, Information, and Education) to the community regarding Dengue Hemorrhagic Fever (DHF), especially how to prevent the presence of Aedes aegypti mosquito larvae and the involvement of Jumantik Cadres is expected to be more active and effective.

Atypical Dengue Outbreak in Odisha: Insights from the Entomological Investigations.

An outbreak of dengue fever struck Tikarapada village, Rayagada district (April 2020). Among 117 fever cases, 49 tested positive for the dengue NS1 antigen. To identify mosquito-related factors in the outbreak, a survey of 101 houses found Aedes breeding sites in 11.6% of containers. Aedes aegypti (79%) and Aedes albopictus (21%) emerged from collected pupae. The village exhibited high (house index = 24.8), (container index = 11.6), (pupal index = 32.7), and (Breteau index = 40.6) indices. The findings confirmed the presence of Aedes and ample breeding sites, suggesting their role in the outbreak. A report recommending integrated vector control measures was submitted to district and state health authorities.

Aedes aegypti oviposition dynamics in towns with low human population density in yungas and dry chaco, Salta, Argentina

We assessed the presence of Aedes aegypti in five ecorregions of Salta province and compared the oviposition activity of Ae. aegypti using ovitraps in towns of two contrasting ecoregions (yungas and Chaco dry forests) in the province of Salta, Argentina, a major contrast in these ecoregions are rain patterns and altitude. Our aim was to estimate how oviposition activities were associated with the ecoregion and site scale local environmental variables. Mosquito oviposition activity was monitored weekly during the summer using ovitraps. Predictor variables were ecoregion, town, and meteorological variables. The effect of the predictor variables was measured on the response variables using multi-model inference. Besides yungas, the presence of Aedes aegypti was confirmed in towns of dry Chaco and High Monte. The only factor that had a significant effect on the presence of eggs in the ovitraps was the ecoregion, with the frequency of positives being higher in yungas. For the number of eggs, the ecoregion, the night temperature of the first week and the NDVI would explain said variable. Overall, results indicate that the variations between towns would be more related with their ecological and climatic characteristics than with the more immediate meteorological variations.

Strategic Management of Public Health Risks: Correlation Between Water Quality and Aedes Sp. in South Jakarta

This study focuses on investigating the relationship between water temperature, water pH, and residual water chlorine with the presence of Aedes sp. larvae in the RW 06 area of North Gandaria Village, Kebayoran Baru District, South Jakarta. Utilizing an analytical cross-sectional research design, the study encompasses a population of 667 houses in RW 06, with a sample size of 92 houses determined through Proportional Simple Random Sampling. The analysis employs chi-square tests to examine the associations between the variables. The findings reveal that there is no significant relationship between water temperature and the presence of Aedes sp. larvae (P-value = 0.659) and no significant relationship between water pH and the presence of Aedes sp. larvae (P-value = 0.434). However, the research does identify a noteworthy association between residual water chlorine and the presence of Aedes sp. larvae (P-value = 0.000). This emphasizes the importance of water chlorine levels in influencing the presence of Aedes sp. larvae in the specified area. The study's outcomes contribute valuable insights to the management of water quality in the context of Aedes sp. larvae control.

Stegomyia indices and pattern recognition of Aedes aegypti (Diptera: Culicidae) in selected agrogeoclimatic zones of Punjab, Pakistan

Mosquito-borne diseases especially, dengue is gaining currency nowadays in Pakistan. As there is no approved dengue vaccine available worldwide, prevention and control of vector is the only solution amid prevailing circumstances. The present study is a maiden attempt to screen indoor and outdoor breeding containers for the presence of Aedes (Ae.) aegypti larvae from selected study districts of Punjab, Pakistan i.e., Dera Ghazi Khan (DG Khan), Chakwal, and Faisalabad. A total of 384 houses from each study districts were surveyed for a calendar year. Mosquito larvae were collected, preserved, and identified using standard taxonomic keys. House Index (HI), Container Index (CI), and Breteau Index (BI) were estimated. Chi-square analysis was applied to calculate the association between Ae. aegypti larvae and breeding containers. Chakwal was identified with the highest values of Stegomyia indices (HI = 46.61 %, BI = 91.67 %, and CI = 15.28 %) followed by Faisalabad (HI = 34.11 %, BI = 68.75 % and, CI = 13.04 %) and DG Khan (HI = 28.39 %, BI = 68.23 % and, CI = 11.29 %). Earthen jars, tree holes, and water tanks were found significantly (p < 0.05) associated with the abundance of larvae irrespective of the geographical location. However, flower tubs and plastic buckets were found significantly (p < 0.05) associated in Faisalabad and Chakwal while, tyres and plastic bottles were found associated (p < 0.05) with the abundance of Ae. aegypti larvae in Faisalabad and DG Khan. These findings will help the stakeholders to devise appropriate preventive measures in combating the risk of dengue transmission.

Determinant factor affected the presence of Aedes sp. in a customary village

Vector surveillance and control are the only reliable means for the prevention and control of dengue fever and dengue hemorrhagic fever, such as in Customary Village environments. Indonesia is an archipelagic country that has many Customary Villages, so the variables that affect the breeding of dengue vectors are numerous and complex. This study identifies potential vector breeding places and environmental factors for the presence of Aedes sp. in Customary Villages. A study with a cross-sectional design was conducted in the Segenter Customary Villages, West Nusa Tenggara, Indonesia. Simple and multiple logistic regression analysis to identify risk factors associated with the presence of Aedes larvae. The results showed that the entomological index was in the high category and at risk as a potential breeding place for the Aedes sp. The determinant factor that affects the presence of dengue vectors is the traditional type of house (p-value=0.005; RP=2.138). This factor is strengthened by the 70-90% humidity (p-value= 0.009; RP=1.764), 25-30 &lt;sup&gt;o&lt;/sup&gt;C house temperatures (p-value=0.011; RP=1.650), and mixed type house (p-value=0.067; RP=1.413). These findings contribute to the development of an early warning system regarding the potential spread of Aedes vector-borne diseases, increase awareness, promote and prevention of dengue fever (DF), and its vectors to healthy tourism in Indonesia.

Joint influence of architectural and spatiotemporal factors on the presence of Aedes aegypti in urban environments.

Urbanization has led to the proliferation of high-rise buildings, which have substantially influenced the distribution of dengue vectors, such as Aedes aegypti (L.). However, knowledge gaps exist regarding the individual and combined effects of architectural and spatiotemporal factors on dengue vector. This study investigated the interrelationship between Ae. aegypti presence, building architectural features, and spatiotemporal factors in urban environments. The mosquito Ae. aegypti presence varied by location and seasons, being higher in outdoor environments than in indoor environments. Lingya (Kaohsiung City, Taiwan) had the highest mosquito numbers, particularly in basement and first floor areas. Ae. aegypti was found on multiple floors within buildings, and their presence was greater in summer and autumn. The XGBoost model revealed that height within a building, temperature, humidity, resident density, and rainfall were key factors influencing mosquito presence, whereas openness had a relatively minor impact. To effectively address the problems caused by urbanization, the three-dimensional distribution of Ae. aegypti, including their spatial distribution across heights and areas within the urban environment, must be considered. By incorporating these multiple factors, this approach provides valuable insights for those responsible for urban planning and disease management strategies. Understanding the interplay between architectural features, environmental conditions, and the presence of Ae. aegypti is essential for developing targeted interventions and mitigating the adverse impacts of urbanization on public health. © 2023 Society of Chemical Industry.

Relationship analysis of protection strategy and the number of containers with the existence of Aedes aegypti larvae at Tebing Tinggi city in 2022

Background: Dengue hemorrhagic fever (DHF) is an endemic disease in Tebing Tinggi, the number of DHF cases in 2022 reached 175. Protection strategy and the number of landfills are risk factors for the presence of Aedes aegypti mosquito larvae. This study aimed to analyze the relationship between protection strategy and the number of containers in the presence of Aedes aegypti. Methods: This type of research was an analytic survey with a cross-sectional research design. The study population was all families living in 5 sub-districts in Tebing Tinggi city with 500 houses selected using a cluster sampling technique. Primary data collection used a questionnaire containing questions on protection strategy and location points, also observation sheets containing the type of landfills, and the number and presence of larvae. Data were analyzed by Chi-Square test. Results: The results showed that Aedes aegypti larvae were found in 144 houses and 14% of families had made protection strategies, 41% of houses had more than 4 containers. Protection strategies against the presence of grass bushes within a radius of 100 meters from the house and the number of landfills had a relationship with the presence of Aedes aegypti mosquito larvae (p&lt;0.05). Conclusions: Tebing Tinggi city is an area that has a high potential risk of DHF. Suggestions for increasing DHF protection strategy and eliminating resting places and breeding places are important for empowering jumantik at the family level as well as providing ongoing assistance and education.

Description of Zoonostic Epidemiological Investigations In Dengue Hemorrhagic Fever (DHF) At Community Health Center of Lamaru

Dengue hemorrhagic fever (DHF) is an infectious disease caused by the bite of the Aedes aegypti mosquito. This disease is still a health problem in Indonesia because the seasons are constantly changing and unpredictable, causing the disease to continue to rise and tends to be difficult to minimize. The main cause of this disease is related to the environment and the fact that there are still many mosquito larvae because the community does not carry out PSN (Mosquito Nest Eradication) and 3M Plus measures. And if the vector that causes DHF is not eradicated it can cause an outbreak. Epidemiological investigation activities are a form of community empowerment which aims to examine mosquito larvae which are vectors for DHF disease transmission and increase awareness of community behavior in carrying out DHF control and prevention. The method used was observation by observing the presence of Aedes aegypti mosquito larvae and interviews at RT 16, Lamaru Village, targeting DHF case sufferers and the people who live around it, as well as socialization regarding PSN DHF and 3M Plus and distribution of abate powder door to door. The results of the activities of the 20 houses examined were 75% positive for mosquito larvae in the bathtub and unused items in residents' homes with a larva-free rate of 25% where these results were still very low and did not meet the target of 95%. Efforts to prevent DHF can be increased through this activity with the community doing 3M Plus &amp; PSN routinely every week.

Investigation of The Presence of Aedes aegypti Larvae and Its Related Factors in Air Putih Community Health Center, Samarinda

Dengue Hemorrhagic Fever (DHF) is a public health problem in Indonesia until now because there are still many morbidity and mortality rates every year. DHF cases in the working area of the Air Putih Health Center fluctuate every year, in 2019 there were 109 cases, in 2020 there were 29 cases and in 2021 there were 44 cases. The purpose of this study was to determine the relationship between breeding places and PSN behavior with the presence of Aedes aegypti mosquito larvae in the working area of the Air Putih Public Health Center, Samarinda City. This study used quantitative, analytic survey methods with a cross-sectional approach where the subjects in this study were houses within the working area of the Air Putih Community Health Center with a sample of 59 houses, a sampling technique set by WHO. Collecting data with a questionnaire, check list and analyzed using the fisher's exact test. As for the bivariate test results, it was found that there was a relationship between TPA for daily needs (p-value = 0.00), TPA not for daily needs (p-value = 0.00) and PSN behavior (p-value = 0.05 ) with the presence of Aedes aegypti mosquito larvae in the working area of the Air Putih Public Health Center, Samarinda City. Suggestions in this study, the people in the working area of the Air Putih Health Center can reduce mosquito breeding places, drain the TPA regularly and bury used items that are not used. It is also hoped that the Puskesmas can improve coordination with the community and cadres in checking mosquito larvae regularly so that they can eradicate the DHF vector.

Public Behavior Awareness of Eradicating Mosquito Larvae in Kelambir Village, Pantai Labu District

&lt;p&gt;The existence of Aedes aegypti mosquito larvae that cause dengue fever is caused by the existence of water reservoirs which play a very important role in the density of the Aedes aegypti mosquito vector because the more adequate water reservoirs, the more places Aedes aegypti mosquito larvae can breed. This study aims to discover how the community's knowledge, attitudes, and actions are related to the presence of Aedes aegypti mosquito larvae in Kelambir Village, Pantai Labu District. This research method is a qualitative descriptive study with a population of hamlet I and three kelambir villages. The sample number was 50 respondents with a simple random sampling technique. The results of the study revealed that out of 50 respondents, 32 respondents (64%) had good knowledge, 18 respondents (36) had less knowledge, 29 respondents (58%) had a good attitude, and 21 respondents (42%) had a poor attitude. Twenty-three respondents (46%) lack practice, 27 respondents (54%) have good practice; it is concluded that good knowledge and mosquito larvae are 32 respondents (64%) have a good attitude, and 29 respondents (58%) and good actions. There were larvae as many as 27 respondents (54%).Iit is expected to increase awareness further as well as good and correct actions in overcoming the problem of mosquito larvae which is the cause of the onset of DHF incidence in the community, such as implementing 3M and implementing a clean and healthy lifestyle.Local Government to utilize the results of this study in making a policy for mosquito larvae eradication efforts that are more in-depth and can provide solutions to solving the problem of dengue cases and dengue fever mosquito larvae breeding. It is expected to increase the comparison's awareness and validity to clarify further the research conducted&lt;/p&gt;

Epidemiological, Entomological, and Climatological Investigation of the 2019 Dengue Fever Outbreak in Gewane District, Afar Region, North-East Ethiopia.

Dengue Fever (DF) is an important arthropod-borne viral infection that has repeatedly occurred as outbreaks in eastern and northeastern Ethiopia since 2013. A cross-sectional epidemiological outbreak investigation was carried out from September to November 2019 on febrile patients (confirmed malaria negative) who presented with suspected and confirmed DF at both public and private health facilities in Gewane District, Afar Region, northeastern Ethiopia. Entomological investigation of containers found in randomly selected houses belonging to DF-positive patients was undertaken to survey for the presence of Aedes larvae/pupae. A total of 1185 DF cases were recorded from six health facilities during the 3-month study period. The mean age of DF cases was 27.2 years, and 42.7% of cases were female. The most affected age group was 15-49 years old (78.98%). The total case proportions differed significantly across age groups when compared to the population distribution; there were approximately 15% and 5% higher case proportions among those aged 15-49 years and 49+ years, respectively. A total of 162 artificial containers were inspected from 62 houses, with 49.4% found positive for Aedes&amp;nbsp;aegypti larva/pupae. Aedes mosquitoes were most commonly observed breeding in plastic tanks, tires, and plastic or metal buckets/bowls. World Health Organization entomological indices classified the study site as high risk for dengue virus outbreaks (House Index = 45.2%, Container Index = 49.4%, and Breteau Index = 129). Time series climate data, specifically rainfall, were found to be significantly predictive of AR (p = 0.035). Study findings highlight the importance of vector control to prevent future DF outbreaks in the region. The scarcity of drinking water and microclimatic conditions may have also contributed to the occurrence of this outbreak.

Relationship of Water Temperature and Air Humidity with Aedes Sp. Manggarai Tebet Village South Jakarta in 2022

Environmental-based diseases are still a health problem for the people of Indonesia. One of the diseases caused by environmental sanitation conditions that do not meet health requirements is dengue hemorrhagic fever. Several environmental factors such as temperature, air, and the intensity of lighting that enter the house are thought to strengthen the occurrence of dengue fever. The presence of mosquito larvae is an indicator that will greatly affect the presence of mosquito populations in a place. This study aims to determine the relationship between water temperature and air humidity with the presence of Aedes sp . in RW. 03 Kelurahan Manggarai, Kecamatan Tebet, South Jakarta in 2022. This research is a descriptive analytic study with a cross sectional study design . The research location in RW 03 is located in Manggarai Village. The total population in this study amounted to 298 houses, while the sample in this study amounted to 75 houses. The sampling technique that the writer uses is cluster random sampling . The results of the study were statistically tested with the chi-square test at a 95% confidence level. The result is that there are 8 houses that found larvae (10.70%) and larvae were found in 19 containers (10.74%). The type of landfill that found the most larvae was buckets totaling 16 (9.04%). With the larva-free rate (ABJ) in RW 03 Manggarai Village, Tebet District, South Jakarta of 89.33%, House Index (HI) of 10.67%, Container Index (CI) of 9.73%, and Breteau Index (BI) by 24. Most of the houses found Aedes sp . In containers with non-optimal temperature (&gt;27 o C) as many as 64 houses (85.30%) and optimal humidity (70-80%) for the growth of Aedes sp . A total of 67 houses (10.70%). Statistical analysis showed that there was a relationship between water temperature and the presence of Aedes sp. ( p-value = 0.000) and there is no relationship between air humidity and the presence of Aedes sp larvae . ( p-value = 0.301). To reduce the presence of Aedes sp . It is suggested that every family member must work together to prevent Aedes sp. where people can live a clean and healthy life, by regulating the air circulation in the house and eliminating the Aedes aegypti mosquito breading place .

Epidemiological description of and response to a large yellow fever outbreak in Edo state Nigeria, September 2018 - January 2019

BackgroundEdo State Surveillance Unit observed the emergence of a disease with “no clear-cut-diagnosis”, which affected peri-urban Local Government Areas (LGAs) from September 6 to November 1, 2018. On notification, the Nigeria Centre for Disease Control deployed a Rapid Response Team (RRT) to support outbreak investigation and response activities in the State. This study describes the epidemiology of and response to a large yellow fever (YF) outbreak in Edo State.MethodsA cross-sectional descriptive outbreak investigation of YF outbreak in Edo State. A suspected case of YF was defined as “Any person residing in Edo State with acute onset of fever and jaundice appearing within 14 days of onset of the first symptoms from September 2018 to January 2019”. Our response involved active case search in health facilities and communities, retrospective review of patients’ records, rapid risk assessment, entomological survey, rapid YF vaccination coverage assessment, blood sample collection, case management and risk communication. Descriptive data analysis using percentages, proportions, frequencies were made.ResultsA total of 209 suspected cases were line-listed. Sixty-seven (67) confirmed in 12 LGAs with 15 deaths [Case fatality rate (CFR 22.4%)]. Among confirmed cases, median age was 24.8, (range 64 (1-64) years; Fifty-one (76.1%) were males; and only 13 (19.4%) had a history of YF vaccination. Vaccination coverage survey involving 241 children revealed low YF vaccine uptake, with 44.6% providing routine immunisation cards for sighting. Risk of YF transmission was 71.4%. Presence of Aedes with high-larval indices (House Index ≥5% and/or Breteau Index ≥20) were established in all the seven locations visited. YF reactive mass vaccination campaign was implemented.ConclusionEdo State is one of the states in Nigeria with the highest burden of yellow fever. More males were affected among the confirmed. Major symptoms include fever, jaundice, weakness, and bleeding. Majority of surveillance performance indicators were above target. There is a high risk of transmission of the disease in the state. Low yellow fever vaccination coverage, and presence of yellow fever vectors (Ae.aegypti, Ae.albopictus and Ae.simpsoni) are responsible for cases in affected communities. Enhanced surveillance, improved laboratory sample management, reactive vaccination campaign, improved yellow fever case management and increased risk communication/awareness are very important mitigation strategies to be sustained in Edo state to prevent further spread and mortality from yellow fever.

Faktor yang Berhubungan dengan Pola Pengelompokkan Kasus Demam Berdarah Dengue (DBD) di Temanggung, Jawa Tengah

Dengue Hemorrhagic Fever (DHF) in Central Java Province is in the second position after East Java-based on mortality rates and Temanggung District is one of the areas in Central Java, which is in high endemic status. The level of dependence of DHF in an area can be influenced by DHF in other adjacent areas. The spread of this disease through mosquito bites from one place to another depends on the presence of the cases and the vector of Aedes sp. This study aimed to identify factors related to the clustering pattern of DHF cases in Temanggung, Central Java. This study used a cross-sectional design and was carried out in the Kandangan Health Center Work Area, Temanggung District. The sample of this study was the houses of all DHF cases in 2020 as many as 60 houses with the research variables: the existence of Aedes sp., vector breeding sites, population density, and time of occurrence. This study uses clustering analysis in the form of the Average Nearest Neighbor (ANN) test with =0.05. The results showed that the factors related to the case-grouping pattern in the Kandangan Health Center Work Area were the presence of Aedes sp., vector breeding sites, high population density, and peak dengue cases that occurred in January and February. The results of this study can be used to determine priority areas in controlling dengue cases in an area.

Pengaruh ekstrak daun pepaya (Carica papaya linn) terhadap larvasida Aedes aegypti

Background: Transmission of Dengue Hemorrhagic Fever (DHF) is strongly influenced by the presence of Aedes aegypti mosquito larvae. The most effective method for tackling DHF is by killing the presence of Aedes aegypti larvae. Reducing the negative impact of using chemical larvicides can be done through a safer alternative model, namely natural larvicides from plants. The plant studied with a characteristic ability to kill Aedes aegypti larvae is papaya leaves. Papaya leaf extract contains compounds of alkaloids, flavonoids, papain, saponins, tannins, and papain, which can kill Aedes aegypti larvae.Objective: This study aims to determine the effectiveness of papaya leaf extract (Carica papaya Linn) and the effect of concentration as Aedes aegypti larvicide.Method: The design used in this study was experimental, using 240 Aedes aegypti larvae, three treatments, and three repetitions. The research was carried out at the Laboratory of the Environmental Health Department of Aceh Health Polytechnic, Ministry of Health in 2021. The data was collected through observations every 1 hour for the first 3 hours. The analysis used was the One Way Anova statistical test and continued with the Least Significance Different (LSD) test at 95% CI.Results: The results showed that the average mortality of Aedes aegypti larvae was at a concentration of 10% (10), a concentration of 20% (13), and a concentration of 30% (16). The results of the Anova test showed that giving papaya leaf extract affected the mortality of Aedes aegypti larvae (p = 0.000). The most effective concentrations in killing Aedes aegypti larvae were 20% and 30%.Conclusion: Papaya leaf extract was very effective as a larvacide of Aedes aegypti, and it was found that concentrations of 20% and 30% were the best formulas for larvicides.

Vector Density Analysis of Dengue Hemorrhagic Fever in Tumpok Teungoh Village, Lhokseumawe City

Dengue hemorrhagic fever (DHF) is an infectious disease of the dengue virus, which is transmitted by the Aedes aegypti mosquito as the main vector and Aedes albopictus as a potential vector. Monitoring the population density of Aedes aegypti is very important to assist in evaluating the presence of threats in each city, and so that mosquito eradication measures can be improved. The purpose of this study was to determine the density of the DHF vector in the village of Tumpok Teungoh, Lhokseumawe City. The population in this study were all houses in the village of Tumpok Teungoh, Lhokseumawe City, which amounted to 2,531 houses. The number of samples used is 100 houses which will be carried out by random sampling. Data was collected through direct observation by observing the type and number of containers as well as the presence of Aedes aegypti in water containers/holds in each house. Data analysis was carried out descriptively on the type of container, the number of larva-positive containers, the number of larva-positive houses, and the larval density, which was calculated based on the house index, container index, and Breteau index numbers. The results showed that the House Index (HI) was 29%, the container index (CI) was 20.5%, and the Breteau index (BI) was 41%. In conclusion, the density of DHF larvae in Tumpok Teungoh Village, Lhokseumawe City, is at level 5, which is the category of moderate risk of DHF transmission.

Confirmed presence of aedes (rusticoidus) refiki Medschid, 1928 in a continental dry Mediterranean peri-urban environment in south-central Spain

BackgroundThe ‘snow-melt mosquito’ aedes (rusticoidus) refiki is a rare species with a wide distribution in Europe that is usually defined as an aggressive mosquito for mammals, including humans. During a mosquito survey in a peri-urban area in south-central mainland Spain, adult Ae. refiki females were captured and identified by morphological traits. The presence of this species of mosquito has never been molecularly confirmed under continental dry Mediterranean climatic influence with scarce number of days with snow on soil. The aim of this study was to confirm by amplification and sequencing of mitochondrial cytochrome c oxidase subunit I (COI) and internal transcribed spacer 2 (ITS2) region.ResultsWe also successfully amplified and typed the species molecularly by COI and ITS2 regions. The peri-urban area where Ae. refiki was found contrasts with the reported cold, humid and snowy environments required by the species to breed.ConclusionsThis finding suggests that the species is already adapted to continental dry Mediterranean environments, questioning whether it is a truly stenotopic species of cold snowy environments.

Environmental Factors linked to the Presence of Aedes aegypti Larvae and the Prevalence of Dengue Hemorrhagic Fever

This study aims to examine the effect of climate and the presence of Aedes aegypti larvae on the prevalence of Dengue Hemorrhagic Fever (DHF) in Bukittinggi. In particular, the study was conducted in order to reduce the prevalence of DHF through vector control (Aedes aegypti) guided by the mosquito larvae free rate by proposing a model for environmental management in an Aedes aegypti larva-free area in Bukittinggi. Rainfall, air temperature, and humidity in 2015-2019 in Bukittinggi were measured to analyze their effect on the prevalence of dengue fever. Samples of data on the prevalence of dengue cases were carried out in total population against data on the prevalence of dengue cases, which amounted to 686 cases, and data on mosquito larvae free rates during 2015-2019. By using Pearson correlation analysis, the results show that the average air temperature in Bukittinggi over the last 5 years allows mosquitoes to survive because they have an average air temperature that functions as an optimum breeding vector. High rainfall can be expected to increase the breeding places of the Aedes aegypti so that the population will increase also has an impact on increasing cases in that month and several months later. Furthermore, the results confirm that there is no significant relationship and also no correlation between physical environmental factors, such as air temperature, humidity, and rainfall with the prevalence of dengue cases in Bukittinggi during the 2015-2019 period. Based on the pattern of distribution of DHF cases in Bukittinggi during the 2015-2019 period, controlling the prevalence of DHF cases needs to focus on activities in areas/villages that are endemic for DHF, without neglecting areas/villages where the prevalence of DHF cases is low, both at the temperature of the air and the mosquitoes will cause dengue fever experience optimal development, low, medium, and high rainfall, as well as in humidity where mosquitoes will experience ideal development.