BackgroundJapanese encephalitis has become a public health threat in Indonesia. Three genotypes have been recorded in Indonesia, i.e. genotype II (GII), genotype III (GIII) and genotype IV (GIV). Genotype I (GI) and genotype V (GV) have never been reported in Indonesia.ResultsA Japanese encephalitis virus (JEV) belonging to the genotype I-a (GI-a) has been isolated for the first time from a Culex gelidus mosquito in the Province of Jambi, Indonesia. This virus is related to a 1983 isolate from Thailand whereas the infected Cx. gelidus mosquito belonged to a Chinese haplotype.ConclusionsSurveillance of JEV and mosquito dissemination is recommended.
A Study of The Effect of Mass Treatment of Repellent on Aedes aegypti (L.) (Diptera: Culicidae). Larval populations was carried out during 14-week period at Laladon village Bogor. A total of 3684 respondents were treated and 202 houses were surveyed for house index (HI), container index (CI), and breteau index (BI). The results showed that long-term mass treatments were effective to decrease 64.85% of the HI, 27.15% CI and 13.57% of BI, up to three weeks after the last application of the repellent. Final checks which were done four weeks later resulted HI as low as 13.86%, CI 7.68%, and BI 3.84%, compared to those at the beginning of the survey which were 73.27%, 31.87% and 15.93%, respectively. KEY WORDS: Aedes aegypti, repellent, breteau index, container index, house index PENDAHULUAN Nyamuk Aedes aegypti (L.) Diptera : Culicidae), yang merupakan serangga vektor penyakit demam berdarah dengue (DBD) berkembangbiak pada permukiman manusia. Penyakit DBD sejauh ini menjadi masalah kesehatan masyarakat di kota-kota besar. Penanggulangan dan pencegahannya lebih banyak mengandalkan pada pemutusan rantai penularan melalui pengendalian A. aegypti dan A. albopictus yang keduanya berperan sebagai vektor penular DBD (WHO 2000). Upaya pengendalian nyamuk A. aegypti saat ini yang terpopuler adalah pengasapan dengan menggunakan insektisida dan gerakan 3 M yaitu menutup, menguras dan menimbun lokasi yang dapat menjadi tempat perkembangbiakan larva nyamuk. Bahkan sekarang, upaya tersebut telah berkembang menjadi 3M plus yaitu disertai dengan cara perlindungan diri lainnya yang dapat dilakukan oleh masyarakat seperti penggunaan anti nyamuk bakar, aerosol, repelen dan lainnya. Umumnya repelen adalah insektisida yang dapat mencegah gigitan nyamuk. Berbagai ragam formulasi produk repelen yang ada di
Several methods exist to collect and assess the abundance of dengue vector mosquitoes, i.e., morning adult collection, pupal collection, ovitraps, human landing, and larval collection. Several of these methods are officially implemented to monitor mosquito density and make decisions on treatments for dengue control. This monitoring is also constrained by the need to conduct this assessment on a “one point/one day” process, meaning that once the threshold of 100 households is reached, the assessment is made, and the collectors teams move to another place, thus preventing the use of long-term sampling methods. This diversity of methods might be a source of variability and lack of statistical significance. There is also a lack of published data regarding the efficacy of these methods. Furthermore, the Stegomyia indices are shown to be not reliable for assessing the risk of dengue outbreaks. A mosquito survey was, thus, conducted in 39 locations corresponding to 15 dengue endemic provinces in Indonesia by using the different adult and larval collection methods recommended nationwide. A total of 44,675 mosquitoes were collected. The single larva method was the most efficient. Out of a total of 89 dengue-positive pools, the most frequently encountered virus was DENV2, which made up half of the positive samples, followed by DENV3 and DENV1, respectively. Factor analysis of mixed data showed that no correlation could be found between any methods and the presence of dengue virus in mosquitoes. Moreover, no correlation could be found between any methods and the incidence of dengue. There was no consistency in the efficacy of a given method from one site to another. There was no correlation between any of the parameters considered, i.e., method, incidence of dengue, location, and the presence of dengue virus in mosquitoes.
The combination of temephos and attractants from O.sativa was effective for lethal ovitrap in laboratory testing. However, the effectiveness of the field application needs further investigation. The study’s objective was to determine the influence of ovitrap installation sites, season variation, and attractant on lethal ovitrap efficacy. The study used a quasi-experimental design. Lethal ovitraps were installed indoors and outdoors in 102 houses and observed for 14 weeks. Statistical analysis was conducted with univariate analysis, independent t-test, and Mann-Whitney Test. The statistical analysis results showed no significant difference in positive ovitraps between LOA and LONA on indoor and outdoor applications. The number of positive ovitraps and trapped eggs was not affected by the attractant applied to the LO during indoor and outdoor observations. Lethal ovitrap can be used as a vector control instrument without the addition of attractants. The application of lethal ovitrap is more effective in the dry season when the mosquito population is lower than in the rainy season
Abstract Vector control that used insecticides need to be substituted, because it has a negative impact for the environment and have been resistance for some areas, so it was necessary to find alternative insecticides. One of the natural insecticides was tobacco (Nicotiana tabacum). The chemical content of tobacco leaves included alkaloids, saponins, and flavonoids. Nicotine was an alkaloid group compound in tobacco, thatwas a nerve poison that reacts quickly and can act as a contact poison in insects, to add the effectiveness it’s necessary change to nano particle with silver. Besides, this test used two solvents with different contains of mineral to compare the effectiveness. This study aimed to test effication of nanoinsecticide from formulation tobacco (Nicotiana tabacum) and silver particle for vector control of larvae Ae.aegypti. It was held at the Center for Research and Development of Disease Vector and Reservoir (B2P2VRP) with an experimental method. The results of the study showed 1,153 ppm LC50, 1,719 ppm LC90 and 1,925 ppm LC90 on solvent distilled water. LC50 of 1,641 ppm, LC90 of 10,741 ppm and LC90 of 18,295 ppm in solvent aquademineralization. Measurements of tobacco nanoinsecticides are known to be 89,2 – 112,0 run in aquadest and 89,2 -112,0 μm in aquademineralization solvents 79,0 – 143,7μm. Abstrak Pengendalian vektor menggunakan insektisida kimiawi perlu disubstisusi karena berdampak buruk pada lingkungan dan menyebabkan resistensi di beberapa daerah, sehingga perlu untuk mendapatkan insektisida alternatif yang ramah lingkungan. Salah satu tanaman insektisida alam, adalah tembakau (Nicotiana tabacum). Kandungan kimia tembakau meliputi alkaloid, saponin, dan flavanoid. Nikotin termasuk senyawa alkaloid dalam tembakau merupakan racun syaraf dengan reaksi cepat serta dapat berfungsi sebagai racun kontak serangga. Namun, untuk menambah daya bunuhnya sebagai larvasida maka ukuran partikel alkaloid perlu dipecah contohnya dengan penambahan perak. Pemilihan perak sebagai pembentuk molekul nano, sedangkan pelarut yang digunakan yaitu akuades dan akuademineralisasi. Kedua pelarut yang digunakan merupakan pelarut standar yang mempunyai daya kelarutan tinggi dengan perbedaan kandungan mineral. Penelitian ini bertujuan untuk uji efikasi nanoinsektisida tembakau (Nicotiana tabacum) yang diformulasikan dengan perak sebagai sarana pengendalian Aedes aegypti stadium pradewasa. Penelitian dilaksanakan di Balai Besar Penelitian dan Pengembangan Vektor dan Reservoir Penyakit (B2P2VRP) dengan metode eksperimental murni. Hasil penelitian didapatkan LC50 1,153 ppm, LC90 1,719 ppm pada pelarut akuademineraliasi dan LC90 1,925 ppm pada pelarut akuades. LC50 1,641 ppm, LC90 10,741 ppm dan LC90 18,295 ppm pada pelarut akuademineralisasi. Pengukuran partikel nanoinsektisida daun tembakau diketahui berukuran 89,2 - 112,0 nm pada pelarut akuades dan 89,2 -112,0 nm pada pelarut akuademineralisasi 79,0 - 143,7nm.
Hantavirus infection is one of zoonotic diseases as a major global threat for human health. Anthropologic, biologic, and cultural factors contribute in the transmission of the infection in Sulawesi. In Sulawesi, some communities have a tradition of eating rat meat. A total of 52 endemic rats species is found in the area. The objective of this study were to identify the species of rats acting as hantavirus reservoir and the percentage of hantavirus seropositive in domestic, peridomestic and silvatic rats in the area. The study was conducted in four provinces, namely Central (year of 2015), North and South East (2016) and South Sulawesi (2017). Three districts of each provinces were selected. The rats captured were identified, and blood sample from each was drawn. Hantavirus infection was identified by an Elisa. The data obtained were presented descriptively. A total of 1259 rats were captured, consisted of eight genus and 27 species, ten of which were seropositive, for hantavirus infection. Six out of ten seropositive rats were record as new record of hantavirus reservoir, namely B. coelestis, B. chyssocomus, B. fratotum, B. prolatus, R. nitidus, and R. hoffmanni. The highest percentage of seropositive Hantavirus was found in peridomestic rats (5.06), while in silvic rats 4.60 and domestic rats 3.46. It is necessary to do hygiene and sanitation campaign and socialization of risks for hantavirus transmission. Abstrak Infeksi hantavirus adalah zoonosis yang telah menjadi ancaman kesehatan global dengan tikus sebagai reservoir utama zoonosis ini. Secara biologi dan antropologi penularan hantavirus rentan terjadi di Pulau Sulawesi karena di pulau ini mempunyai 52 spesies tikus endemik dan sebagian kecil masyarakat di Sulawesi mempunyai kebiasaan mengonsumsi daging tikus. Penelitian ini bertujuan untuk mengidentifikasi spesies-spesies tikus yang berperan sebagai reservoir hantavirus dan menghitung persentase seropositif hantavirus pada tikus domestik, peridomestik dan silvatik di Pulau Sulawesi. Penelitian dilakukan pada tahun 2015 di Provinsi Sulawesi Tengah, tahun 2016 di Provinsi Sulawesi Utara dan Sulawesi Tenggara, serta tahun 2017 di Sulawesi Selatan. Penangkapan tikus dilakukan di tiga kabupaten pada setiap provinsi. Tikus tertangkap diidentifikasi dan diambil spesimen darahnya. Pemeriksaan serologi dengan menggunakan teknik Elisa. Data dianalisis secara deskriptif. Hasil penelitian menunjukkan tikus tertangkap sebanyak 1.259 ekor yang terdiri dari delapan genus dan 27 spesies. Sepuluh spesies seropositif terhadap hantavirus, enam diantaranya merupakan catatan baru sebagai reservoir hantavirus. Keenam spesies tersebut adalah Bunomys coelestis, B. chyssocomus, B. fratotum, B. prolatus, R. nitidus, dan R. hoffmanni. Persentase tikus seropositif terhadap hantavirus tertinggi ditemukan pada tikus peridomestik (5,06), sedangkan pada tikus silvatik 4,60 dan tikus domestik 3,46. Perlu dilakukan kampanye peningkatan sanitasi serta sosialisasi ke masyarakat terkait risiko penularan hantavirus.
Since 2016, there has been an increase in cases of malaria sufferers mostly from the Army Infantry Battalion 411 Pandawa based in Salatiga City. Based on data from the Salatiga District Health Service, number of cases reached 93 people who were positively malaria in 2016 and 84 positive cases in 2017. The purpose of this study was to determine the potential for malaria transmission to the the Indonesian Armed Forces (TNI) 411 Pandawa Battalion in Salatiga City. This research was a descriptive analytic type research with crossectional approach. The results of the study obtained a blood sample of 66 people and were willing to be interviewed. Chi-square test results are known to travel outside the area significantly associated with the incidence of malaria with a value of p <0,05. The results of this study interview, most of the soldiers were exposed to malaria while serving in the inland of Papua Province, in 2015. The results of blood tests found the Plasmodium vivax malaria parasite with a young trophozoite stage in the blood of three soldiers. The potential for transmission in the Infantry Battalion 411 in Salatiga City is nothing and the location of the soldier's dormitory does not reseptive because there are no malaria vectors.
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