Journal of Vector Borne Diseases最新文献

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Diversity of mosquito natural enemies and their feeding efficacy on Aedes vectors. 蚊子天敌的多样性及其对伊蚊病媒的捕食效果。
IF 0.5 4区 医学
Journal of Vector Borne Diseases Pub Date : 2024-05-20 DOI: 10.4103/JVBD.JVBD_50_24
Dinithi Shamalee Dissanayake, Chandana Dammika Wijekoon, Hemantha Wegiriya
{"title":"Diversity of mosquito natural enemies and their feeding efficacy on Aedes vectors.","authors":"Dinithi Shamalee Dissanayake, Chandana Dammika Wijekoon, Hemantha Wegiriya","doi":"10.4103/JVBD.JVBD_50_24","DOIUrl":"10.4103/JVBD.JVBD_50_24","url":null,"abstract":"<p><strong>Background objectives: </strong>Mosquito-borne diseases are a major health issue among communities in Asia, and dengue has grown up as a serious public health concern in Sri Lanka with varying magnitude since 1960. With the realization of the failures and limitations of current vector control strategies, the authorities are moving towards simple, low-cost, and eco-friendly vector management methods. Thus, the present study was devised to evaluate the potential densities of mosquito natural enemies in natural water habitats in Galle district, Sri Lanka, and to investigate the feeding efficacy of prominent mosquito natural enemies on main dengue vectors ( Aedes sp.) in a laboratory setting.</p><p><strong>Methods: </strong>The survey was carried out using eight sentinel sites in Galle district, and samples of mosquito natural enemies and mosquito larvae were collected, and then they were identified using taxonomic keys.</p><p><strong>Results: </strong>Study records, the aquatic insects of Family Hydrometridae, Belostomatidae, Notonectidae, Nepidae, Ranatridae, and Corixidae as dominant mosquito natural enemies, and Libellulidae and Dytiscidae insects as sub-dominant families. The highest density of the family Hydrometridae was recorded in rural, natural inland, and rocky study sites. The order Hemiptera was recorded as the key order of the mosquitoes natural enemies in Galle district. The family Hydrometridae had the highest density of recorded mosquito natural enemies.</p><p><strong>Interpretation conclusion: </strong>Aedes aegypti and Ae. albopictus were recorded as abundant vector mosquitoes. Family Nepidae is the most effective natural mosquito predator on Ae. aegypti and Ae. albopictus, and this knowledge will be vital for implementing future biological control strategies for Aedes vectors in Sri Lanka.</p>","PeriodicalId":17660,"journal":{"name":"Journal of Vector Borne Diseases","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141260810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Evaluation of InBios Scrub Typhus Detect IgM Rapid Test in Acute Fever Cases from Southwest and East India. 在印度西南部和东部的急性发热病例中评估 InBios 恙虫病检测 IgM 快速检测仪。
IF 0.5 4区 医学
Journal of Vector Borne Diseases Pub Date : 2024-05-20 DOI: 10.4103/JVBD.JVBD_73_22
Punekar Madhura, Anup Jayaram, Prasad Varamballi, Dsa Oliver, Sasidharanpillai Sabeena
{"title":"Evaluation of InBios Scrub Typhus Detect IgM Rapid Test in Acute Fever Cases from Southwest and East India.","authors":"Punekar Madhura, Anup Jayaram, Prasad Varamballi, Dsa Oliver, Sasidharanpillai Sabeena","doi":"10.4103/JVBD.JVBD_73_22","DOIUrl":"10.4103/JVBD.JVBD_73_22","url":null,"abstract":"<p><strong>Background objectives: </strong>Scrub typhus is clinically undifferentiated from other aetiologies for acute febrile illness such as enteric fever, dengue, malaria, and leptospirosis. Rapid ELISA tests are being used as an alternative to immunofluorescence assay in tropical countries.</p><p><strong>Methods: </strong>In this study, we compared and evaluated commercially available InBios Scrub Typhus Detect IgM Rapid Test (USA) for diagnosing human scrub typhus infection using archived and prospectively collected samples against the reference standard, InBios Scrub Typhus Detect IgM ELISA (USA).</p><p><strong>Results: </strong>The data analysis of archived samples on rapid test revealed a moderate sensitivity of 53.92% and a specificity of 100%. Meanwhile, prospective serum samples demonstrated higher sensitivity and specificity of 96.4% and 94.6%, respectively.</p><p><strong>Interpretation conclusion: </strong>The InBios Scrub Typhus Detect IgM rapid test can be a good point-of-care assay during surveillance, outbreak investigations, and case identification.</p>","PeriodicalId":17660,"journal":{"name":"Journal of Vector Borne Diseases","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141261079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Influence of climatic factors on the life stages of Aedes mosquitoes and vectorial transmission: A review. 气候因素对伊蚊生命阶段和病媒传播的影响:综述。
IF 0.5 4区 医学
Journal of Vector Borne Diseases Pub Date : 2024-05-13 DOI: 10.4103/JVBD.JVBD_42_24
Pooja Prasad, Sanjeev Kumar Gupta, Kaushal Kumar Mahto, Gaurav Kumar, Alka Rani, Iyyappan Velan, Deepak Kumar Arya, Himmat Singh
{"title":"Influence of climatic factors on the life stages of Aedes mosquitoes and vectorial transmission: A review.","authors":"Pooja Prasad, Sanjeev Kumar Gupta, Kaushal Kumar Mahto, Gaurav Kumar, Alka Rani, Iyyappan Velan, Deepak Kumar Arya, Himmat Singh","doi":"10.4103/JVBD.JVBD_42_24","DOIUrl":"https://doi.org/10.4103/JVBD.JVBD_42_24","url":null,"abstract":"<p><strong>Background objectives: </strong>Aedes aegypti and Aedes albopictus are two sympatric mosquito species that compete with each other for resources when their breeding habitats overlap. This study examines what happens when sympatric Aedes aegypti and Aedes albopictus mosquitoes' mate with each other and other species by looking at insemination rates, fecundity, and hatchability rate.</p><p><strong>Methods: </strong>We performed controlled mating experiments in laboratory setting, assessing both conspecific and interspecific crosses. We measured insemination rates, egg numbers, and hatching success to examine the reproductive interference dynamics between these two distinct mosquito species.</p><p><strong>Results: </strong>In the context of conspecific mating, it was observed that both female Ae. aegypti and Ae. albopictus exhibited high insemination rates, with percentages of 98% and 94%, respectively. However, interspecific mating exhibited interesting asymmetries: Ae. albopictus males achieved a notable insemination success rate of 28% when mating with Ae. aegypti females, while Ae. aegypti males achieved only 8% insemination success with Ae. albopictus females. Additionally, females that mated with interspecific males had reduced production of viable eggs compared to conspecific mating. Most notably, interspecific mating resulted in the production of infertile eggs, while conspecific mating led to successful hatching.</p><p><strong>Interpretation conclusion: </strong>The study reveals that, Ae. aegypti and Ae. albopictus can asymmetrically interfere with each other's reproduction, causing a 'satyr' effect. This understanding of interspecific competition and reproductive interference in these mosquito species could impact their coexistence in shared breeding habitats.</p>","PeriodicalId":17660,"journal":{"name":"Journal of Vector Borne Diseases","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140958438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Computational design, docking, and molecular dynamics simulation study of RNA helicase inhibitors of dengue virus. 登革热病毒 RNA 螺旋酶抑制剂的计算设计、对接和分子动力学模拟研究。
IF 0.5 4区 医学
Journal of Vector Borne Diseases Pub Date : 2024-05-06 DOI: 10.4103/JVBD.JVBD_188_23
Raghunath Satpathy, Sonali Acharya, Rashmiranjan Behera
{"title":"Computational design, docking, and molecular dynamics simulation study of RNA helicase inhibitors of dengue virus.","authors":"Raghunath Satpathy, Sonali Acharya, Rashmiranjan Behera","doi":"10.4103/JVBD.JVBD_188_23","DOIUrl":"https://doi.org/10.4103/JVBD.JVBD_188_23","url":null,"abstract":"<p><strong>Background and objectives: </strong>RNA viruses are complex pathogens in terms of their genetic makeup, mutation frequency, and transmission modes. They contain the RNA helicase enzyme, which plays a crucial role in the viral genome replication process. This work aims to develop and screen a potential molecule that could function as a dengue virus (DENV) RNA helicase inhibitor.</p><p><strong>Methods: </strong>The present study was performed by taking 26 potential derivatives of gedunin phytochemicals from the PubChem database as ligands. The binding study of the compounds were analyzed by in silico docking method considering DENV RNA helicase enzyme as the receptor.</p><p><strong>Results: </strong>After a thorough analysis of the docking scores, toxicity, and physicochemical properties, compound tetrahydrogedunin was obtained as the best. Based on tetrahydrogedunin molecular structure, 100 drug-like molecules were designed using the Data Warrior tool. After the screening process for drug-likeness and ADMET properties, the derivative number 42 was considered as the promising. Further comparative docking of derivative 42 and a standard inhibitor molecule ST-610 with DENV RNA helicase enzyme showed binding affinity as -10.0 kcal/mol and -9.6 kcal/mol, respectively. The favorable interaction between DENV RNA helicase and derivative 42 was further validated by 50 nanoseconds molecular dynamics simulation and MM-GBSA analysis.</p><p><strong>Interpretation conclusion: </strong>Since the antiviral activity of derivative 42 has not been reported till date, the compound was predicted as a novel therapeutic molecule that can act against the dengue virus (DENV) RNA helicase enzyme.</p>","PeriodicalId":17660,"journal":{"name":"Journal of Vector Borne Diseases","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140849091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Assessment of radiation-induced sterility, longevity, and reproductive characteristics of the Aedes aegypti (Diptera: Culicidae) strain of Swat: A step towards the implementation of SIT in Pakistan. 评估斯瓦特埃及伊蚊(双翅目:库里科)菌株的辐射诱导不育症、寿命和生殖特征:向在巴基斯坦实施 SIT 迈出的一步。
IF 0.5 4区 医学
Journal of Vector Borne Diseases Pub Date : 2024-05-06 DOI: 10.4103/JVBD.JVBD_131_23
Inamullah Khan, Gul Zamin Khan, Jehangir Khan, Muhammad Amin
{"title":"Assessment of radiation-induced sterility, longevity, and reproductive characteristics of the Aedes aegypti (Diptera: Culicidae) strain of Swat: A step towards the implementation of SIT in Pakistan.","authors":"Inamullah Khan, Gul Zamin Khan, Jehangir Khan, Muhammad Amin","doi":"10.4103/JVBD.JVBD_131_23","DOIUrl":"https://doi.org/10.4103/JVBD.JVBD_131_23","url":null,"abstract":"<p><strong>Background objectives: </strong>Biological approaches for vector mosquito control such as sterile insect technique (SIT) requires sterilization of male mosquitoes through specific radiation doses for sterility induction in males. Under the SIT program, the males used must be compatible with the wild males in vigor, flight and selection of mate. Much of this potential is determined by the diet provided in the larval stages and optimizing the irradiation doses that cause complete sterility but have very minimal effect on the lives of irradiated males. The current study is designed to evaluate gamma radiation doses for inducing sterility in male Aedes aegypti mosquitoes with a genomic background from Pakistan (Swat district) and to assess the effects of radiation exposure on the competency of irradiated males and other life traits of irradiated mosquitoes.</p><p><strong>Methods: </strong>Sterilization of 17-hour-old male pupae (groups of 50 pupa/cup in three replicates) of the Ae. aegypti Swat strain was conducted using radiation doses of 30, 60, 70, 90, and 105 gray (Gy) from (Co60) at the Nuclear Institute for Food and Agriculture (NIFA) in Peshawar, Pakistan. Post-irradiated pupae were released in adult cages. Virgin females of the same cohort were released (1:1) to mate with the irradiated males. Mortality, longevity, mating competitiveness of males, and female fecundity were recorded.</p><p><strong>Results: </strong>An average of 71 eggs per female was recorded in control with 86% hatch rate. Individual females mated with a 60 Gy treated males produced 60 ± 0.6 eggs per female with 17% hatch rate, and those mated with 70 Gy males produced 42 ± 0.01 eggs with a nil hatch rate, whereas females mated with males treated with ≥70 Gy doses did not reproduce to next generation. Females in groups of 50 mated with 60, 70 Gy treated males (equal pairs), produced 369±1.3 and 98±0.01 eggs with 15% and zero hatch rate. Significant dose dependent reduction in longevity was observed for >30 Gy doses. The matting competence of irradiated males was about half that of un-irradiated males.</p><p><strong>Interpretation conclusion: </strong>Aedes aegypti with a Pakistani genomic background treated with a ≥70 Gy dose of gamma radiation induced complete sterility in males and provided the first- step foundation for SIT application in Pakistan. Further extensive studies are required to optimize the SIT techniques so that fully sterile males with very minor quality changes can be produced on large scales for field trials.</p>","PeriodicalId":17660,"journal":{"name":"Journal of Vector Borne Diseases","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140852236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dengue dynamics: Prognostic and disease monitoring through molecular and serological profiling of clinical isolates. 登革热动态:通过对临床分离株进行分子和血清学分析,对疾病进行预测和监测。
IF 0.5 4区 医学
Journal of Vector Borne Diseases Pub Date : 2024-04-18 DOI: 10.4103/JVBD.JVBD_202_23
Vikas Tiwari, Mohd Afzal, Abhishek Sharma, Jaishree Tiwari
{"title":"Dengue dynamics: Prognostic and disease monitoring through molecular and serological profiling of clinical isolates.","authors":"Vikas Tiwari, Mohd Afzal, Abhishek Sharma, Jaishree Tiwari","doi":"10.4103/JVBD.JVBD_202_23","DOIUrl":"https://doi.org/10.4103/JVBD.JVBD_202_23","url":null,"abstract":"BACKGROUND OBJECTIVES\u0000Dengue fever is a mosquito-borne illness that affects millions of people worldwide every year. With no vaccination available, early detection and treatment is critical. One-hundred-twelve countries in the world pose a risk to travelers, particularly in metropolitan areas. Laboratory diagnoses vary according to objectives, resources, and schedule, with sensitivity and specificity must be balanced for effective testing.\u0000\u0000\u0000METHODS\u0000The current work is a cross-sectional diagnostic study and samples from suspected patients of dengue was collected from May 15 to November 15 2023 and transported to laboratory, and RT-PCR and Dengue Duo Rapid test diagnosis techniques were used on 48 clinical samples included in this study.\u0000\u0000\u0000RESULTS\u0000Blood was collected from suspected cases of dengue and subjected further to different molecular and serological parameters. Serum was separated from all 48 blood samples. RNA was isolated by silica column extraction method which is further utilized as a template for amplification and detection of dengue serotyping. Master Mix was prepared for the amplification and detection of dengue virus by Rotor-Gene Q Real-Time PCR Machine and further serological profiling of positive dengue cases was studied by conventional PCR.\u0000\u0000\u0000INTERPRETATION CONCLUSION\u0000Our laboratory effectively standardized an RT-PCR-based approach for molecular identification of dengue virus in clinical specimens. This adaptive technique which used numerous primer sets displayed good specificity and sensitivity in serotype detection. The technology provides for quick and reliable identification of dengue virus infections, allowing for targeted treatment and preventative actions for successful disease management in highly populated regions.","PeriodicalId":17660,"journal":{"name":"Journal of Vector Borne Diseases","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140687639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dengue encephalitis: A rare manifestation of dengue fever. 登革脑炎:登革热的一种罕见表现。
IF 0.5 4区 医学
Journal of Vector Borne Diseases Pub Date : 2024-04-18 DOI: 10.4103/JVBD.JVBD_189_23
Hewa Babarandage Chathurika Harshani, D. Ruwan, G. Chathuranga, Dedunu C U Dias Weligamagea, Janaki Abeynayake
{"title":"Dengue encephalitis: A rare manifestation of dengue fever.","authors":"Hewa Babarandage Chathurika Harshani, D. Ruwan, G. Chathuranga, Dedunu C U Dias Weligamagea, Janaki Abeynayake","doi":"10.4103/JVBD.JVBD_189_23","DOIUrl":"https://doi.org/10.4103/JVBD.JVBD_189_23","url":null,"abstract":"Dengue fever, caused by the dengue virus transmitted by mosquitoes, usually manifests as flu-like symptoms and is a prevalent tropical illness. However, there are rare cases where the infection takes an unusual course, resulting in severe complications like dengue encephalitis. This case report delineates an occurrence of dengue encephalitis in a patient from Sri Lanka. This work provides insights into the clinical presentation, diagnostic difficulties, and treatment approaches linked to this uncommon manifestation of dengue fever.","PeriodicalId":17660,"journal":{"name":"Journal of Vector Borne Diseases","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140688697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Social, behavioral and environmental determinants of vector-borne diseases: A narrative review of evidence and implications for integrated control approaches. 病媒传播疾病的社会、行为和环境决定因素:证据综述及对综合控制方法的影响。
IF 0.5 4区 医学
Journal of Vector Borne Diseases Pub Date : 2024-04-18 DOI: 10.4103/JVBD.JVBD_34_24
Ahmad Y Alqassim
{"title":"Social, behavioral and environmental determinants of vector-borne diseases: A narrative review of evidence and implications for integrated control approaches.","authors":"Ahmad Y Alqassim","doi":"10.4103/JVBD.JVBD_34_24","DOIUrl":"https://doi.org/10.4103/JVBD.JVBD_34_24","url":null,"abstract":"Vector-borne diseases exert immense health burdens worldwide. Malaria alone causes over 200 million cases and 600,000 deaths annually. Transmission involves complex drivers requiring examination beyond entomological factors. A systematic literature search across databases identified relevant studies on vector-borne disease determinants published in the last two decades, with priority given to rigorous designs like longitudinal analyses, reviews, and meta-analyses from diverse epidemic regions, allowing narrative synthesis of key determinants, relationships, and gaps. This narrative review synthesizes evidence on social, behavioral, and environmental determinants of major vector-borne disease risks over the past decade. Lower education, poverty, unplanned urbanization, gender inequities, inadequate water and waste management, climate variations, and land-use changes stood out as key determinants. However, significant knowledge gaps remain around quantifying precise threshold effects and impacts of tailored interventions across contexts. A social-ecological perspective recognizing interdependencies between determinants should frame integrated control programs. Multicomponent strategies addressing environmental modifications, protective measures, behavioral motivators, and infrastructure alongside governance and community engagement require implementation research and impact evaluation. Overall, this review highlights priority areas for advancing evidence-based vector control through contextualized, determinant-targeted policies and interventions. Further research incorporating modeling, trials, and cost-effectiveness analyses is critical to validate approaches that address influential drivers, leverage motivators, and reduce the global burden.","PeriodicalId":17660,"journal":{"name":"Journal of Vector Borne Diseases","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140686648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Shifting spatial, temporal and demographic patterns of dengue incidence and associated meteorological factors in Jazan Region of Saudi Arabia from 2015-2020. 2015-2020 年沙特阿拉伯贾赞地区登革热发病率的空间、时间和人口模式变化及相关气象因素。
IF 0.5 4区 医学
Journal of Vector Borne Diseases Pub Date : 2024-04-18 DOI: 10.4103/JVBD.JVBD_15_24
Ahmad Y Alqassim, M. Badedi, Mohammed A. Muaddi, Abdullah A. Alharbi, Mohammad A Jareebi, Anwar M Makeen, M. El-Setouhy, Osama B Albasheer, Abdullah Sabai, Ahmed Sahly
{"title":"Shifting spatial, temporal and demographic patterns of dengue incidence and associated meteorological factors in Jazan Region of Saudi Arabia from 2015-2020.","authors":"Ahmad Y Alqassim, M. Badedi, Mohammed A. Muaddi, Abdullah A. Alharbi, Mohammad A Jareebi, Anwar M Makeen, M. El-Setouhy, Osama B Albasheer, Abdullah Sabai, Ahmed Sahly","doi":"10.4103/JVBD.JVBD_15_24","DOIUrl":"https://doi.org/10.4103/JVBD.JVBD_15_24","url":null,"abstract":"BACKGROUND\u0000Dengue poses a considerable public health threat in Saudi Arabia, with escalating outbreaks in Jazan, where seasonal rains create ideal mosquito breeding conditions. Elucidating local epidemiological dynamics is imperative to strengthen evidence-based prevention policies. This study analyzed the spatiotemporal, demographic, and meteorological patterns of dengue in Jazan from 2015-2020.\u0000\u0000\u0000METHODS\u0000This retrospective cross-sectional study utilized surveillance records for 3427 confirmed dengue cases. Descriptive analyses characterized geographic, seasonal, age, sex, and nationality distributions. Forecasting models project expected epidemics through 2025. Regression analysis identified climate factors associated with monthly case counts.\u0000\u0000\u0000RESULTS\u0000Dengue exhibited shifting seasonal peaks, transitioning into year-round transmission by 2019, indicating endemic establishment. Cases clustered in different high-burden sectors annually, requiring localized vector control. The majority of affected individuals were young male adults, with gender gaps narrowing over time. Saudi nationals had an escalating incidence, but non-citizens showed a higher risk, signaling importation threats. Seasonal outbreaks were associated with temperature, wind speed, and direction.\u0000\u0000\u0000CONCLUSION\u0000Enhanced surveillance, outbreak forecasting, targeted control activities, and integrated prevention policies grounded in continuous evidence assessment can effectively address endemic dengue transmission in Jazan. This study provides key insights to optimize data-driven decision-making for dengue control in Saudi Arabia.","PeriodicalId":17660,"journal":{"name":"Journal of Vector Borne Diseases","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140687665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A comparative study on vector competence of Anopheles stephensi from geographically distinct malarious and a non-malarious urban area to Plasmodium vivax. 关于不同地理位置的恶性和非恶性城市地区的按蚊对间日疟原虫的媒介能力的比较研究。
IF 0.5 4区 医学
Journal of Vector Borne Diseases Pub Date : 2024-04-12 DOI: 10.4103/JVBD.JVBD_7_24
J. Ravindran, Alex Eapen
{"title":"A comparative study on vector competence of Anopheles stephensi from geographically distinct malarious and a non-malarious urban area to Plasmodium vivax.","authors":"J. Ravindran, Alex Eapen","doi":"10.4103/JVBD.JVBD_7_24","DOIUrl":"https://doi.org/10.4103/JVBD.JVBD_7_24","url":null,"abstract":"BACKGROUND OBJECTIVES\u0000Anopheles stephensi is responsible for the transmission of malaria in urban areas. Vector competence of An. stephensi from a non-malarious (Coimbatore) and highly malarious (Chennai) urban areas in Tamil Nadu state of India, was investigated to find the reason for non-transmission of malaria in Coimbatore.\u0000\u0000\u0000METHODS\u0000Vector competence (susceptibility/refractoriness) of An. stephensi mosquitoes from Chennai (malarious) and Coimbatore (non-malarious) to Plasmodium vivax (Chennai) was investigated. Bioassays were carried out concurrently in both these strains by artificial membrane feeding technique using the same malaria-infected blood. An. stephensi were dissected to observe infection in midgut and salivary gland. The parasite infection, oocyst and sporozoite positivity rate, the oocyst load, correlation between male-female gametocyte ratio and infection, and Survival Analysis of parasitic stages during sporogony were analyzed and compared.\u0000\u0000\u0000RESULTS\u0000The overall infection rate was 45.8 and 41.2 percent in Chennai and Coimbatore, respectively. Oocyst count ranged from 1-80 and 1-208 respectively and not statistically significant. Oocyst positivity was high from Day 8-21 in both strains. The Mean Survival Day (MSD) for oocyst was Day 14 in both strains. Sporozoite was observed in four experiments in each of the strains and the MSD for sporozoites was Day 20 in Chennai and Day 17 in Coimbatore.\u0000\u0000\u0000INTERPRETATION CONCLUSION\u0000An. stephensi of Chennai and Coimbatore are equally susceptible to P. vivax infection and non-transmission of malaria in Coimbatore can be attributed to external factors such as the presence of preferential breeding habitat, vector density, vector survival, and weather. The only difference observed was the comparatively shortened oocyst maturation time in the Coimbatore strain which requires further investigation.","PeriodicalId":17660,"journal":{"name":"Journal of Vector Borne Diseases","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140712053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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